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1.
Pesqui. bras. odontopediatria clín. integr ; 24: e220113, 2024. tab, graf
Article in English | LILACS, BBO | ID: biblio-1529140

ABSTRACT

Abstract Objective: To evaluate the effect of different pressures of an oral irrigation device (OID) and the irrigation solution type on the surface roughness of the giomer restorative material. Material and Methods: In this in vitro study, disk-shaped giomer samples were fabricated and assigned to 5 groups (n=23): Group 1, storage in distilled water (control); Group 2, OID #7 pressure/ water; Group 3, OID #10 pressure/ water; Group 4, OID #7 pressure/ 0.05% CHX; Group 5, OID #10 pressure/ 0.05% CHX. The samples' treatment simulated a one-year application of OID. Surface roughness (Ra) and topography of the giomer were evaluated using profilometry and scanning electron microscopy. The data were analyzed with Paired t-test, Tukey, and ANOVA tests (α=0.05). Results: The Ra of the samples increased significantly after treatment with OID (p<0.001). The roughness increase in groups with a pressure of 10 was higher than those with a pressure of 7 (p<0.001). The effect of pressure on surface changes was significant (p<0.001). However, the solution type and the cumulative effect of these two factors were insignificant (p=0.08 and p=0.43, respectively). Conclusion: Oral irrigation device with both solutions significantly increased the surface roughness and topographic changes of the giomer. The severity of these changes was related to the device's pressure.


Subject(s)
Biguanides , Distilled Water , Chlorhexidine/adverse effects , Composite Resins , Surface Properties , In Vitro Techniques/methods , Analysis of Variance , Hardness Tests/methods
2.
Pesqui. bras. odontopediatria clín. integr ; 24: e220171, 2024. tab, graf
Article in English | LILACS, BBO | ID: biblio-1529141

ABSTRACT

Abstract Objective: To compare the clinical effect of two desensitizing agents used before the application of a bleaching gel based on 35% hydrogen peroxide (HP). Material and Methods: 30 patients were selected, and two desensitizing agents with different mechanisms of action were applied: Fluorine Neutral 2% (FN), which acts by blocking dentinal canaliculi while Potassium Nitrate 5% with 2% Sodium Fluoride (PN/SF) that acts in nerve transmission and blockade. Desensitizers were used before the application of 35% HP. For whitening, three clinical sessions were performed, with an interval of seven days, with three applications of the bleaching gel for 15 minutes, totaling 45 minutes/session. Tooth sensitivity (TS) was assessed with the numerical analog scale, and a spectrophotometer was used to obtain the color variation (ΔE). ΔE were submitted to ANOVA and Tukey test (p<0.05), and TS data were submitted to a two-way ANOVA analysis. Results: For sensitivity experience, the Tukey test indicated differences between PN/SF and the placebo I, but there was no statistically significant difference between FN and the placebo II. The TS was lower when the desensitizing gel was used during the bleaching procedure compared to after treatment, regardless of the desensitizing agents. Conclusion: PN/SF before in-office tooth bleaching can reduce TS intensity, and the use of desensitizing gel before bleaching did not affect the bleaching efficacy.


Subject(s)
Humans , Male , Female , Adult , Dentin Desensitizing Agents/adverse effects , Hydrogen Peroxide/adverse effects , Sodium Fluoride/adverse effects , Spectrophotometers , Analysis of Variance , Fluorine
3.
RFO UPF ; 27(1)08 ago. 2023. ilus, tab
Article in Portuguese | LILACS, BBO | ID: biblio-1511047

ABSTRACT

Objetivo: avaliar in vitro o polimento sobre resina acrílica quimicamente ativada (RAQA), por meio da rugosidade de superfície (Ra). Materiais e Método: Foram confeccionadas 40 amostras de RAQA, com dimensões de 10 a 10 x 2 mm, e foram divididas em quatro grupos (n=10): ausência do acabamento (AA); Ausência de polimento (AP); Polimento químico (PQ); Polimento com borrachas siliconadas + Escovas (PM). Os espécimes foram avaliados no quanto a rugosidade média (Ra) antes e após o envelhecimento em água destilada em uma estufa por 60 dias. Três medições de Ra (µm), na horizontal foram realizadas e calculada uma média para cada espécime. Os dados foram analisados de forma descritiva e inferencial, ANOVA de medidas repetidas e teste de Tukey com nível de significância de 5%. Resultados: Inicialmente, o grupo AA teve os menores valores de Ra e o grupo AP os maiores valores de rugosidade, com média e desvio padrão respectivamente 0,17 (±0,11) e 0,52 (±0,10). Após o envelhecimento, o grupo AA teve as menores médias e o grupo PQ os maiores valores de Ra, sendo 0,38 (±0,20) e 1,33 (±0,32), respectivamente. Os resultados evidenciaram diferença estatística significante quando as amostras foram submetidas ao acabamento com brocas. Conclusão: A RAQA necessita de polimento após acabamento com brocas, uma vez que a ausência de polimento comprometerá a lisura de superfície do material.(AU)


Objective: to evaluate in vitro polishing on chemically activated acrylic resin (RAQA), using surface roughness (Ra). Materials and Method: 40 RAQA samples were made, measuring 10 to 10 x 2 mm, and divided into four groups (n=10): absence of finishing (AA); Lack of polishing (AP); Chemical polishing (PQ); Polishing with silicone rubbers + Brushes (PM). The specimens were evaluated for their average roughness (Ra) before and after aging in distilled water in an oven for 60 days. Three horizontal Ra (µm) measurements were taken and an average was calculated for each specimen. Data were analyzed descriptively and inferentially, using repeated measures ANOVA and Tukey test with a significance level of 5%. Results: Initially, the AA group had the lowest Ra values and the AP group the highest roughness values, with mean and standard deviation respectively 0.17 (±0.11) and 0.52 (±0.10). After aging, the AA group had the lowest averages and the PQ group the highest Ra values, being 0.38 (±0.20) and 1.33 (±0.32), respectively. The results showed a statistically significant difference when the samples were finished with drills. Conclusion: RAQA requires polishing after finishing with drills, as the lack of polishing will compromise the surface smoothness of the material.(AU)


Subject(s)
Acrylic Resins/chemistry , Dental Polishing/methods , Reference Values , Silicone Elastomers , Surface Properties , Time Factors , Analysis of Variance , Evaluation Study
4.
RFO UPF ; 27(1): 41-57, 08 ago. 2023. tab, graf
Article in Portuguese | LILACS, BBO | ID: biblio-1509383

ABSTRACT

Objetivo: o presente estudo teve como objetivo avaliar, in vitro, o potencial erosivo para o esmalte dentário de bebidas ácidas, comumente ingeridas pela população e encontradas com frequência no comércio da grande Florianópolis, SC, Brasil. Método: a mensuração do potencial erosivo das bebidas foi realizada através da detecção do potencial hidrogeniônico (pH) e acidez titulável (AT). A amostra foi composta por refrigerantes à base de cola, Coca-Cola® e Pepsi®; isotônicos Gatorade®-morango e maracujá e Powerade®-mix de frutas; Chás industrializados Natural Tea®-limão e Chá Matte Leão®-natural; energéticos Red Bull® e Monster Energy®; sucos naturais de Laranja Pera e de Limão Taiti; água saborizada H2OH!®-sabor limão; e água mineral, para o grupo controle. O pH foi aferido com pHmetro digital (Sensoglass SP1800) e para a AT foi utilizado o método padronizado pelo Instituto Adolfo Lutz, todos os ensaios foram realizados em triplicata. Para a análise estatística descritiva, foram empregados teste t e a ANOVA. Resultados: os menores valores de pH foram encontrados para a bebida Coca-Cola® e suco de limão com 2,3. Para AT, as amostras que apresentaram os maiores valores foram os sucos naturais, com 35,1 para o suco de limão e 13,5 para o suco de laranja. Todas as bebidas analisadas possuem potencial erosivo ao esmalte dental, por apresentarem valores de pH menores que 5,5. Quanto as mensurações de AT, os sucos naturais apresentaram os maiores valores. Conclusão: todas as bebidas do estudo foram consideradas iminentemente erosivas à estrutura dental.(AU)


Objetivo: o presente estudo teve como objetivo avaliar, in vitro, o potencial erosivo para o esmalte dentário de bebidas ácidas, comumente ingeridas pela população e encontradas com frequência no comércio da grande Florianópolis, SC, Brasil. Método: a mensuração do potencial erosivo das bebidas foi realizada através da detecção do potencial hidrogeniônico (pH) e acidez titulável (AT). A amostra foi composta por refrigerantes à base de cola, Coca-Cola® e Pepsi®; isotônicos Gatorade®-morango e maracujá e Powerade®-mix de frutas; Chás industrializados Natural Tea®-limão e Chá Matte Leão®-natural; energéticos Red Bull® e Monster Energy®; sucos naturais de Laranja Pera e de Limão Taiti; água saborizada H2OH!®-sabor limão; e água mineral, para o grupo controle. O pH foi aferido com pHmetro digital (Sensoglass SP1800) e para a AT foi utilizado o método padronizado pelo Instituto Adolfo Lutz, todos os ensaios foram realizados em triplicata. Para a análise estatística descritiva, foram empregados teste t e a ANOVA. Resultados: os menores valores de pH foram encontrados para a bebida Coca-Cola® e suco de limão com 2,3. Para AT, as amostras que apresentaram os maiores valores foram os sucos naturais, com 35,1 para o suco de limão e 13,5 para o suco de laranja. Todas as bebidas analisadas possuem potencial erosivo ao esmalte dental, por apresentarem valores de pH menores que 5,5. Quanto as mensurações de AT, os sucos naturais apresentaram os maiores valores. Conclusão: todas as bebidas do estudo foram consideradas iminentemente erosivas à estrutura dental.(AU)


Subject(s)
Sodium Hydroxide/analysis , Tooth Erosion/chemically induced , Beverages , Analysis of Variance , Statistics, Nonparametric , Dental Enamel , Hydrogen-Ion Concentration
5.
RFO UPF ; 27(1)08 ago. 2023. tab
Article in Portuguese | LILACS, BBO | ID: biblio-1516336

ABSTRACT

Introdução: A cárie dentária é uma doença multifatorial que compreende vários fatores biológicos e sociais. A superfície proximal dos dentes é uma região de difícil visualização que pode esconder pequenas lesões cariosas no esmalte dentário, impossibilitando o diagnóstico através de inspeções visuais e táteis. Objetivo: O objetivo deste trabalho foi avaliar a profundidade da cárie proximal nos exames radiográficos convencionais e digitais, comparando as profundidades das lesões consideradas nestes exames às do exame histológico. Método: Foram utilizados exames radiográficos interproximais de 40 dentes humanos, 20 pré-molares e 20 molares, com alterações clínicas em uma das superfícies proximais, como lesões de mancha branca ou acastanhada e pequenas cavitações. Três profissionais especializados em radiologia odontológica com mais de cinco anos de experiência clínica mediram a profundidade das lesões pelos exames radiográfico e digital das amostras. Para obter os resultados, utilizou-se a técnica de análise de variância (ANOVA). Resultados: Constatou-se um nível de significância de 5% nas mensurações dos exames radiográficos convencionais e digitalizados, mostrando a fidelidade das imagens radiográficas em relação a real profundidade da lesão. Conclusão: Conclui-se que os exames de imagem avaliados foram eficientes na determinação da profundidade das lesões de cárie proximal.


Introduction: Dental caries is a multifactorial disease that comprises several biological and social factors. The proximal surface of the teeth is a region of difficult visualization that can hide small carious lesions in the dental enamel, making diagnosis through visual and tactile inspection infeasible. Objective: The objective of this study was to evaluate the depth of proximal caries in the conventional and digitized radiographic examinations, comparing the depths of the lesions considered in these examinations to those of the histological examination. Method: Interproximal radiographic examinations of 40 human teeth, 20 premolars and 20 molars, with clinical alterations on one of the proximal surfaces, such as white or brown spot lesions and small cavitations, were used. Three professionals specialized in dental radiology with more than five years of clinical experience measured the depth of the lesions by radiographic examination of the samples. To obtain the results, we used the technique of analysis of variance (ANOVA). Results: A level of significance of 5% was found in conventional and digitized radiographic measurements, showing the fidelity of the radiographic images in relation to the actual depth of the lesion. Conclusion: It was concluded that the imaging tests evaluated were efficient in determining the depth of proximal caries lesions.


Subject(s)
Radiography, Bitewing/methods , Radiography, Dental, Digital/methods , Dental Caries/diagnostic imaging , Reference Values , Bicuspid/diagnostic imaging , Observer Variation , Analysis of Variance , Molar/diagnostic imaging
6.
Int. j. morphol ; 41(4): 1107-1111, ago. 2023. tab
Article in English | LILACS | ID: biblio-1514329

ABSTRACT

SUMMARY: The aim of this research is to introduce the ideal lecture technique to the literature by explaining the anatomy of the skeletal system using the classical method, video-assisted method and 3D imaging techniques. The research was carried out with 180 students. The number of samples was determined by power analysis (a=0.05,b=0.20, effect size=0.25). Participants were pre-screened and divided into 4 groups with the closest group mean (group 1: control group: the group that did not take anatomy lessons, group 2: video-assisted anatomy education, group 3: 3D anatomy course, group 4: classical anatomy education group). The courses in the training groups were organised as 4 hours/day, 2 days/week for 5 weeks. At the end of the course, the students were re-examined and scaled to determine the difference in scores and self-efficacy between the groups. A one-way ANOVA test was performed because the data were normally distributed when comparing between groups. The mean scores were calculated as group 1=30.22±6.24, group 2=39.02±9.15, group 3=49.77±9.20 and group 4=59.28±8.95. In the post hoc comparison, in pairwise comparisons between all groups, the differences were highly significant (pgroup 3>group 2>group 1 (p<0.001). According to the results of this study, the laboratory method in skeletal anatomy teaching is the best alternative to 3D anatomy teaching.


El objetivo de esta investigación es introducir la técnica de lectura ideal en la literatura, explicando la anatomía del sistema esquelético, utilizando el método clásico, el método asistido por video y las técnicas de imágenes en 3D. La investigación se llevó a cabo con 180 estudiantes. El número de muestras se determinó mediante análisis de potencia (a=0,05, b=0,20, tamaño del efecto=0,25). Los participantes fueron preseleccionados y divididos en 4 grupos con la media de grupo más cercana (grupo 1: grupo de control: el grupo que no tomó lecciones de anatomía, grupo 2: educación de anatomía asistida por video, grupo 3: curso de anatomía 3D, grupo 4: grupo de educación en anatomía clásica). Los cursos en los grupos de formación se organizaron con 4 horas/día, 2 días/semana durante 5 semanas. Al final del curso, los estudiantes fueron reexaminados y escalados para determinar la diferencia en puntajes y autoeficacia entre los grupos. Se realizó una prueba de ANOVA de una vía debido a que los datos se distribuyeron normalmente al comparar entre grupos. Las puntuaciones medias se calcularon como grupo 1=30,22±6,24, grupo 2=39,02±9,15, grupo 3=49,77±9,20 y grupo 4=59,28±8,95. En la comparación post hoc, en comparaciones por pares entre todos los grupos, las diferencias fueron altamente significativas (pgrupo 3>grupo 2>grupo 1 (p<0,001). Según los resultados de este estudio, el método de laboratorio en la enseñanza de la anatomía esquelética es la mejor alternativa a la enseñanza de la anatomía en 3D.


Subject(s)
Humans , Imaging, Three-Dimensional , Education, Medical/methods , Video-Assisted Techniques and Procedures , Anatomy/education , Learning , Musculoskeletal System/anatomy & histology , Surveys and Questionnaires , Analysis of Variance , Educational Measurement , Musculoskeletal System/diagnostic imaging
7.
Rev. ADM ; 80(4): 190-196, jul.-ago. 2023. ilus, tab
Article in Spanish | LILACS | ID: biblio-1525858

ABSTRACT

Introducción: la adaptación marginal e interna de nuestras restauraciones fabricadas por fundición sistemas de fresado y sinterización láser es uno de los factores clínicos más importantes para el éxito de las prótesis fijas, previniendo el riesgo de microfiltración y enfermedad periodontal. Objetivo: evaluar la adaptación marginal e interna de cofias metálicas en aleación Cr-Co confeccionadas por técnicas convencionales, CAD/ CAM de fresado y sinterizado por láser. Material y métodos: estudio de tipo experimental, comparativo e in vitro. Se imprimió un modelo maestro en Cr-Co, proveniente del escaneo de un premolar preparado para corona completa, sobre el cual se diseñaron 30 cofias divididas en tres grupos: el primero que corresponde al grupo cofias fundidas fresadas en disco de cera A (A = 10), el segundo grupo cofias fresadas en disco de metal presinterizado B (B = 10) y el tercer grupo cofias impresas por sinterización láser C (C = 10). Se empleó la réplica de silicona, colocando silicona al interior de cada cofia, sobre el modelo maestro, simulando al cemento, mediante una máquina de ensayo universal se realizó una compresión de 50 N. Luego de retirar cada cofia se rellenaron con silicona pesada de adición, obteniendo una réplica de silicona. Se efectuaron dos cortes transversales en sentido vestíbulolingual y mesiodistal. Se observó el espesor de silicona VPS (vinil poliéter silicona) mediante un estereomicroscopio (Nikon SMZ745T), obteniendo valores en micrómetros. Para el análisis estadístico se utilizó el software SPSS 25 con el fin de realizar la prueba de normalidad y ANOVA de dos vías bajo un nivel de confianza del 95%. Resultados: el menor gap lo obtuvo el grupo de fresadas, seguido de las impresas y por último las fundidas por métodos convencionales. ANOVA de dos vías reveló diferencias estadísticamente significativas entre los tres grupos (p < 0.0001). Conclusiones: se encontró que el gap varía con cada método de fabricación, la técnica convencional de fundido mostró un mayor gap, ninguna excediendo el rango clínicamente aceptable (AU)


Introduction: the marginal and internal adaptation of our restorations manufactured by casting, milling systems and laser sintering is one of the most important clinical factors for the success of fixed prostheses, preventing the risk of microleakage and periodontal disease. Objective: evaluate the marginal and internal adaptation of metal copings in Cr-Co alloy made by conventional techniques, CAD/CAM milling and laser sintering. Material and methods: an experimental, comparative and in vitro study, a Cr-Co master model was printed from the scan of a premolar prepared for a full crown. An experimental, comparative and in vitro study, a Cr-Co master model was printed from the scan of a premolar prepared for a full crown, on which 30 caps divided into three groups were designed; the first group corresponds to the cast copings milled on a wax disc A (A = 10), the second group milled copings on a presintered metal disc B (B = 10) and the third group printed by laser sintering copings C (C = 10). The silicone replica was used, placing silicone inside each coping, on the master model, simulating cement, using a universal testing machine, a 50 N compression was performed. After removing each coping, they were filled with heavy addition silicone, obtaining a silicone replica. Two cross-sections were made in the buccolingual and mesiodistal direction., observing the thickness of the VPS (vinyl polyeter silicone) silicone using a stereomicroscope (Nikon SMZ745T), obtaining values in micrometers. For the statistical analysis, the SPSS 25 software was used in order to perform the normality and two-way ANOVA tests under a 95% confidence level. Results: the smallest gap was obtained by the milled group, followed by the printed ones and finally those cast by conventional methods. Two-way ANOVA revealed statistically significant differences between the three groups (p < 0.0001). Conclusions: the gap was found to vary with each fabrication method, the conventional casting technique showed a larger gap, none exceeding the clinically acceptable range (AU)


Subject(s)
Chromium Alloys , Computer-Aided Design , Dental Marginal Adaptation , Crowns , Lasers , In Vitro Techniques , Analysis of Variance
8.
Psicol. teor. prát ; 25(3): 15070, 10 jul. 2023.
Article in English, Portuguese | LILACS | ID: biblio-1451198

ABSTRACT

The purpose of this study was to test the effectiveness, and the sustained effect (follow-up) of a fourweek mindfulness intervention in reducing anxiety and stress in a group of Brazilian university students, the intervention was adapted to be made available through the application Neurosaúde, created as part of this work to serve as a platform for intervention. The research as a whole took place in a virtual environment, with forty-eight participants recruited who were randomly allocated to the intervention group or to the waiting list control. Measures were used to access the levels of mindfulness, anxiety and stress before, after the intervention and at the 4-week follow-up. Applying the intention-to-treat analysis, we found significant differences between the groups for the measurement of anxiety in the follow-up with a large feat size (F (2.92) = 10.275, p = 0.000, η2 = 0.183). Our results suggest that the 4-week mindfulness intervention through a mobile application was able to act as a protective factor against the anxiety developed by university students during the occurrence of the pandemic caused by Covid-19, whereas while the treatment group maintained levels reduced anxiety the control group demonstrated a continuous increase in anxiety in the post-test and follow-up that coincided with the first wave of Covid-19 in the region where the participants lived.


El propósito de este estudio fue probar la eficacia y el efecto sostenido (seguimiento) de una intervención de atención plena de cuatro semanas para reducir la ansiedad y el estrés en un grupo de estudiantes universitarios brasileños, la intervención se adaptó para estar disponible a través del app. Neurosaúde, creada como parte de este trabajo para servir como plataforma de intervención. La investigación en su conjunto se llevó a cabo en un entorno virtual, siendo reclutados cuarenta y ocho participantes que fueron asignados aleatoriamente al grupo de intervención o al control en lista de espera. Se utilizaron medidas para evaluar los niveles de atención plena, ansiedad y estrés antes, después de la intervención y en el seguimiento a las 4 semanas. Al aplicar el análisis por intención de tratar, encontramos diferencias significativas entre los grupos para la medida de ansiedad en el seguimiento con un tamaño de efecto grande (F (2.92) = 10.275, p = 0.000, η2 = 0.183). Nuestros resultados sugieren que la intervención de mindfulness de 4 semanas a través de una aplicación móvil fue capaz de actuar como factor protector contra la ansiedad desarrollada por estudiantes universitarios durante la ocurrencia de la pandemia de Covid-19, ya que mientras el grupo de tratamiento mantuvo niveles, el grupo control demostró un aumento continuo de la ansiedad en el postest y seguimiento que coincidió con la primera ola de Covid-19 en la región donde residían los participantes.


O propósito deste estudo foi testar a eficácia e o efeito sustentado (follow-up) de uma intervenção de mindfulness de quatro semanas na redução da ansiedade e estresse em um grupo de estudantes universitários brasileiros. A intervenção foi adaptada para ser disponibilizada pelo aplicativo Neurosaúde, criado como parte deste trabalho para servir de plataforma para a intervenção. A pesquisa como um todo ocorreu em ambiente virtual, sendo recrutados 48 participantes que foram alocados randomicamente para o grupo intervenção ou para o controle de lista de espera. Medidas foram utilizadas para acessar os níveis de mindfulness, ansiedade e estresse antes, após a intervenção e no follow-up de quatro semanas. Aplicando a análise por intenção de tratar, encontramos diferenças significativas entre os grupos para a medida de ansiedade no follow-up com um tamanho de efeito grande (F (2.92) = 10.275, p = 0.000, η2 = 0.183). Nossos resultados sugerem que a intervenção de mindfulness de quatro semanas por meio de um aplicativo móvel foi capaz de agir como um fator protetor contra a ansiedade desenvolvida pelos estudantes universitários durante a ocorrência da pandemia causada pelo Covid-19, visto que, enquanto o grupo tratamento manteve níveis reduzidos de ansiedade, o grupo controle demonstrou um contínuo aumento de ansiedade no pós-teste e follow-up que coincidiu com a primeira onda de Covid-19 na região onde os participantes residiam.


Subject(s)
Humans , Male , Female , Adolescent , Adult , Young Adult , Anxiety/therapy , Stress, Psychological/therapy , Mindfulness/standards , Internet-Based Intervention , Anxiety/prevention & control , Stress, Psychological/prevention & control , Students/psychology , Analysis of Variance , COVID-19/psychology
9.
Int. j. morphol ; 41(3): 901-909, jun. 2023. ilus, tab
Article in English | LILACS | ID: biblio-1514281

ABSTRACT

SUMMARY: To evaluate the histological adverse effects of alendronate administered systemically and topically in combination with orthodontic movement by intense force. Thirty-six 24-week-old female Wistar rats, ovariectomized, were used and divided into three groups (n = 12/group): control, locally treated with saline (0.07 ml/kg/week) (group 1) and experimental, treated with alendronic acid systemically (0.07 mg/kg/week) (group 2) and locally (7 mg/kg/week) (group 3). At 14 days, an orthodontic anchor was installed in the right first molar, and a force of 144 cN was applied for 28 days. The samples were processed for histological evaluation. Descriptive statistics, Shapiro-Wilk tests, one-way ANOVA with Bonferroni correction, one-way repeated measures ANOVA and chi-square tests were performed. All tests were statistically significant at p <0.05. The adverse events found in all groups were inflammation and osteoclastic activity. In the bisphosphonate-treated groups, there were statistically significant differences (p = 0.005) in the osteoclastic activity between the two hemiarcates. All rats in group 2 presented paralytic ileus. Compared to local administration, systemic treatment with alendronic acid produces more adverse effects, such as inflammation, fibrinoid necrosis, and osteoclastic activity. During the application of intense forces, it was not possible to show that there is necrosis associated with bisphosphonates.


Evaluar los efectos adversos histológicos del alendronato administrado sistémica y tópicamente en combinación con movimientos ortodóncicos de fuerza intensa. Treinta y seis ratas Wistar hembras de 24 semanas de edad, ovariectomizadas, fueron utilizadas y divididas en tres grupos (n = 12/grupo): control, tratado localmente con solución salina (0,07 ml/kg/semana) (grupo 1) y experimental, tratados con ácido alendrónico por vía sistémica (0,07 mg/kg/semana) (grupo 2) y local (7 mg/kg/semana) (grupo 3). A los 14 días se instaló un anclaje de ortodoncia en el primer molar derecho y se aplicó una fuerza de 144 cN durante 28 días. Las muestras fueron procesadas para evaluación histológica. Se realizó estadística descriptiva, pruebas de Shapiro-Wilk, ANOVA de una vía con corrección de Bonferroni, ANOVA de medidas repetidas de una vía y pruebas de chi-cuadrado. Todas las pruebas fueron estadísticamente significativas con un p <0,05. Los eventos adversos encontrados en todos los grupos fueron inflamación y actividad osteoclástica. En los grupos tratados con bisfosfonatos hubo diferencias estadísticamente significativas (p = 0,005) en la actividad osteoclástica entre los dos hemiarcados. Todas las ratas del grupo 2 presentaron íleo paralítico. En comparación con la administración local, el tratamiento sistémico con ácido alendrónico produce más efectos adversos, como inflamación, necrosis fibrinoide y actividad osteoclástica. Durante la aplicación de fuerzas intensas, no fue posible demostrar que existe necrosis asociada con los bisfosfonatos.


Subject(s)
Animals , Female , Rats , Tooth Movement Techniques/instrumentation , Alendronate/adverse effects , Bone Density Conservation Agents/adverse effects , Maxilla/pathology , Bone Resorption/chemically induced , Ovariectomy , Analysis of Variance , Rats, Wistar , Orthodontic Anchorage Procedures , Inflammation/chemically induced
10.
Psico USF ; 28(1): 103-116, Jan.-Mar. 2023. tab, graf, il
Article in Portuguese | LILACS, INDEXPSI | ID: biblio-1431093

ABSTRACT

O Instrumento para Breve Avaliação da Leitura, Escrita e Compreensão (IBALEC) se propõe a avaliar o desempenho de alunos de escola pública no domínio das habilidades básicas de alfabetização. Após a validação de conteúdo, por meio da análise de um grupo de especialistas, o IBALEC foi aplicado individualmente em 825 alunos (439 do sexo masculino e 386 do sexo feminino) do 1º ao 5º ano do ensino fundamental em duas escolas públicas, a fim de realizar a análise de sua estrutura interna. As análises fatoriais efetuadas demonstraram bom ajustamento do instrumento a um modelo de estrutura interna composto por cinco fatores correlacionados, correspondentes aos construtos teóricos que subsidiaram a sua construção: leitura de palavras, escrita de palavras, escrita de frases, leitura/compreensão de frases e, leitura/compreensão de texto. Esses resultados constituem forte evidência da validade de construto do IBALEC, para avaliar as habilidades a que se propõe. (AU)


The Instrument for Brief Assessment of Reading, Writing, and Comprehension (IBALEC) aims to assess the performance of public school students in the mastery of basic literacy skills. After content validation, based on the analysis of a group of specialists, the IBALEC was applied individually to 825 students (439 boys and 386 girls) from the 1st to the 5th year of Elementary Education in two public schools, to analyze its internal structure. The factorial analyses performed demonstrated a good fit of the instrument to an internal structure model composed of five correlated factors, corresponding to the theoretical constructs that subsidized its construction: word reading, word writing, sentence writing, sentence reading comprehension, and reading/understanding text. These results are strong evidence of the construct validity of IBALEC, to assess the proposed skills. (AU)


El Instrumento de Evaluación Breve de Lectura, Escritura y Comprensión (IBALEC) tiene como objetivo evaluar el desempeño de los estudiantes de escuelas públicas en las competencias básicas de alfabetización. Después de la validación del contenido, mediante el análisis de un grupo de especialistas, el IBALEC se aplicó de forma individual a 825 alumnos (439 niños y 386 niñas) de 1º a 5º año de primaria de dos centros públicos, con el fin de realizar el análisis de su estructura interna. Los análisis factoriales ejecutados demostraron un buen ajuste del instrumento a un modelo de estructura interna compuesto por cinco factores correlacionados, correspondientes a los constructos teóricos que subsidiaban su construcción: lectura de palabras, escrita de palabras, escrita de oraciones, lectura/comprensión de oraciones, y lectura/comprensión de texto. Estos resultados constituyen una fuerte evidencia de la validez de constructo del IBALEC para evaluar las habilidades propuestas. (AU)


Subject(s)
Humans , Male , Female , Child , Reading , Handwriting , Learning Disabilities , Students , Reproducibility of Results , Analysis of Variance , Factor Analysis, Statistical , Education, Primary and Secondary , Literacy , Memory and Learning Tests , Academic Performance , Correlation of Data
11.
Psico USF ; 28(1): 135-148, Jan.-Mar. 2023. tab
Article in English | LILACS, INDEXPSI | ID: biblio-1431098

ABSTRACT

Our aim was to understand to what extent the characteristics of psychopathy are correlated with personality traits and human values in a sample of imprisoned inmates. To this end, a total of 56 prisoners were evaluated, predominantly female (80.4%) with a mean age of 33.44 (SD=7.15). The following instruments were employed: (1) Hare scale, (2) Human Values Questionnaire (BVQ), (3) Big Five Personality Traits Inventory (BFI-S) and (4) Demographic Questionnaire. Descriptive statistics and Spearman's rank correlation coefficient were applied. The results indicated a positive correlation between a socially deviant/antisocial lifestyle (Factor 2) and the dimensions of neuroticism (r s =0.44; p<0.001), openness to experience in the BFI-S (r s =0.26; p<0.05) and experimentation in the BVQ (r s =0.36; p<0.001). It was concluded that the present study contributes to an understanding of personality traits and values related to psychopathy, expanding the nomological network of this construct. (AU)


Objetivou-se conhecer em que medida o traço de psicopatia correlaciona-se com os traços de personalidade e os valores humanos em uma amostra carcerária. Para tanto, avaliou-se 56 detentos, a maioria mulheres (80,4%), com média de idade de 33,44 (DP=7,15). Foram utilizados os seguintes instrumentos: (1) Escala Hare, (2) Questionário de Valores Humanos (QVB), (3) Inventário dos Cinco Grandes Fatores de Personalidade (IGFP - 5) e (4) Questionário Demográfico. Foram aplicadas estatísticas descritivas e correlação rho de Spearman. Os resultados indicaram uma relação positiva entre o estilo de vida socialmente desviante/antissocial (Fator 2) e as dimensões de neuroticismo (r s =0,44; p<0,001), abertura a mudança do IGFP-5 (r s =0,26; p<0,05) e experimentação do QVB (r s =0,36; p<0,001). Conclui-se que o presente estudo contribui para o conhecimento dos traços de personalidade e valores relacionados a psicopatia, ampliando a rede nomológica deste construto. (AU)


El objetivo de la presente investigación fue conocer en qué medida el rasgo de la psicopatía se correlaciona con los rasgos de personalidad y valores humanos en una muestra penitenciaria. Para ello, fueron evaluados 56 detenidos, en su mayoría mujeres (80,4%), con una media de edad de 33,44 años (DS=7,15). Se utilizaron los siguientes instrumentos: (1) Escala Hare, (2) Cuestionario de valores humanos (QVB), (3) Inventario de los Cinco Grandes Factores de Personalidad (IGFP-5) y (4) Cuestionario demográfico. Se aplicaron estadísticas descriptivas y la correlación rho de Spearman. Los resultados indicaron una relación positiva entre conducta socialmente desviada/antisocial (Factor 2) y las dimensiones de neuroticismo (r s =0,44; p<0,001), apertura al cambio en el IGFP-5 (r s =0,26; p<0,05) y experimentación de QVB (r s =0,36; p<0,001). Se concluye que el presente estudio contribuye al conocimiento de los rasgos y valores de personalidad relacionados con la psicopatía, ampliando la red nomológica de este constructo. (AU)


Subject(s)
Humans , Male , Female , Adult , Middle Aged , Young Adult , Personality , Prisoners , Social Values , Mental Disorders , Personality Inventory , Personality Tests , Behavior , Interviews as Topic , Surveys and Questionnaires , Analysis of Variance , Statistics, Nonparametric , Recidivism , Correlation of Data , Sociodemographic Factors
12.
Psico USF ; 28(1): 79-90, Jan.-Mar. 2023. tab
Article in English | LILACS, INDEXPSI | ID: biblio-1431101

ABSTRACT

This cross-sectional study aimed to analyze the association of religiosity with behaviors and perceptions in the context of social distancing measures during the COVID-19 pandemic, as well as mental health outcomes, in a university community in Central-West Brazil. A sample of 1,796 subjects responded to an online form with socio-demographic questions and the DASS-21 and PWBS scales. Religion was associated with the frequency of interactions, perceptions of the duration of the social distancing measures, changes in emotional state and history of psychological illness. The prevalence of symptoms of depression, anxiety and stress was lower among people with religion and their scores in psychological well-being were higher. (AU)


Trata-se de um estudo transversal com o objetivo de analisar a associação entre religiosidade e comportamentos e percepções frente ao distanciamento social decorrente da pandemia de Covid-19 e estado de saúde mental em uma comunidade universitária do Centro-Oeste brasileiro. Participaram do estudo 1796 sujeitos, os quais responderam a um formulário online com questões sociodemográficas e às escalas DASS-21 e EBEP. Observou-se associação entre religião e frequência de interações, percepção sobre a duração do distanciamento social e mudanças no estado emocional e histórico de alterações psicológicas. Constatou-se menor prevalência de sintomas relacionados à depressão, à ansiedade e ao estresse e maiores escores de bem-estar psicológico entre aqueles com religião. (AU)


Se trata de un estudio transversal con el objetivo de analizar la asociación entre religiosidad, comportamientos y percepciones frente al distanciamiento social resultante de la pandemia Covid-19 y el estado de salud mental en una comunidad universitaria de la región Centro-Oeste de Brasil. Participaron en el estudio 1796 sujetos, que respondieron un formulario en línea con preguntas sociodemográficas y las escalas DASS-21 y EBEP. Se observó asociación entre religión y frecuencia de interacciones, la percepción de la duración del aislamiento social y los cambios en el estado emocional y el historial de cambios psicológicos. Se observó una menor prevalencia de síntomas relacionados con la depresión, la ansiedad y el estrés, y puntuaciones más altas de bienestar psicológico entre quienes profesaban una religión. (AU)


Subject(s)
Humans , Male , Female , Adolescent , Adult , Middle Aged , Aged , Aged, 80 and over , Young Adult , Religion , Mental Health , Physical Distancing , COVID-19 , Chi-Square Distribution , Cross-Sectional Studies , Surveys and Questionnaires , Reproducibility of Results , Statistics as Topic , Analysis of Variance , Factor Analysis, Statistical , Faculty , Sociodemographic Factors , Psychological Well-Being
13.
Psico USF ; 28(1): 13-29, Jan.-Mar. 2023. tab, graf
Article in Portuguese | LILACS, INDEXPSI | ID: biblio-1431102

ABSTRACT

O objetivo deste artigo foi propor padrões normativos para a Career Adapt-Abilities Scale (CAAS-Brasil) considerando diferenças em função das variáveis sociodemográficas: sexo, estado civil, faixa etária, escolaridade e faixa de rendimento. A amostra foi composta por 2.999 indivíduos, idades variando de 14 a 77 anos, maioria do sexo feminino (63%) e representantes de 21 estados brasileiros. As propriedades psicométricas da CAAS-Brasil foram investigadas por meio de Teoria de Resposta ao Item e coeficiente ômega. Os resultados evidenciaram invariância para a CAAS-Brasil e maiores diferenças de médias nas variáveis faixa etária, escolaridade e faixa de rendimento. A partir disso, foram apresentados padrões normativos para a amostra geral e dividida, considerando as variáveis que apresentaram diferenças. Os padrões normativos apresentados neste artigo possibilitarão que profissionais de orientação profissional e de carreira interpretem, com base em normas, os escores de adaptabilidade de carreira de seus orientandos, tornando a avaliação mais substantiva. (AU)


This article aimed to propose normative standards for the Career Adapt-Abilities Scale (CAAS-Brazil) considering differences in terms of sociodemographic variables: gender, marital status, age group, education level, and income. The sample consisted of 2999 individuals, within the age range of 14 to 77 years, mostly women (63%) from 21 Brazilian states. The psychometric properties of CAAS-Brazil were investigated using Item Response Theory and the Omega coefficient. Results showed invariance for the CAAS-Brazil and greater mean differences in the variables age group, education, and income. From this, normative standards for the overall sample were presented and divided considering the variables that showed differences. The normative standards presented in this article will enable career guidance professionals to interpret the career adaptability scores of their students, making the assessment more robust. (AU)


El objetivo de este artículo fue proponer estándares normativos para la Career Adapt-Abilities Scale (CAAS-Brasil) considerando diferencias en términos de variables sociodemográficas: género, estado civil, grupo de edad, escolaridad y rango de ingresos. La muestra estuvo constituida por 2.999 individuos, con edades comprendidas entre 14 y 77 años, en su mayoría mujeres (63%) y representantes de 21 estados brasileños. Las propiedades psicométricas de CAAS-Brasil se investigaron mediante la Teoría de Respuesta al Ítem y el coeficiente Omega. Los resultados mostraron invarianza para el CAAS-Brasil y mayores diferencias de medias en las variables edad, escolaridad e ingresos. A partir de esto, se presentaron estándares normativos para la muestra general y se dividieron considerando las variables que manifestaron diferencias. Los estándares normativos presentados en este artículo permitirán a los profesionales de la orientación profesional interpretar y la orientación interpretar, basándose en normas, las puntuaciones de adaptabilidad profesional de sus alumnos, haciendo que la evaluación sea más sustantiva. (AU)


Subject(s)
Humans , Male , Female , Adolescent , Adult , Middle Aged , Aged , Young Adult , Psychometrics , Work , Adaptation, Psychological , Vocational Guidance , Career Choice , Surveys and Questionnaires , Analysis of Variance , Sociodemographic Factors
14.
Int. j. morphol ; 41(1): 90-95, feb. 2023. tab
Article in English | LILACS | ID: biblio-1430541

ABSTRACT

SUMMARY: The main goal of this research was to determine whether there is a statistically significant difference in the anthropometric characteristics of fourth grade elementary school students, who live in different demographic environments in Montenegro. The research was conducted on a sample of 120 students, fourth grade elementary school, male (60 students from urban areas and 60 students from rural areas). To measure anthropometric characteristics, 12 measures were applied (Body height, arm length, leg length, shoulder width, elbow diameter, knee diameter, body weight, upper arm circumference, lower leg circumference, skin fold of the back, skin fold of the upper arm, skin fold of the abdomen). After conducting research with the application of appropriate statistical procedures: descriptive analysis, multivariate analysis of variance (MANOVA) and analysis of variance (ANOVA), it was noticed that there is a statistically significant difference in the treated space of anthropometric characteristics. Boys from rural areas are more dominant than boys from urban areas in the longitudinal and transverse dimensionality of the skeleton and in volume on certain body segments, and boys from urban areas are more dominant than boys from rural areas in body weight and subcutaneous fat, which puts them at risk for obesity.


El objetivo principal de esta investigación fue determinar si existe una diferencia estadísticamente significativa en las características antropométricas de los estudiantes de cuarto grado de primaria, que viven en diferentes entornos demográficos en Montenegro. La investigación se realizó sobre una muestra de 120 estudiantes, cuarto grado de primaria, sexo masculino (60 estudiantes de zona urbana y 60 estudiantes de zona rural). Para medir las características antropométricas se aplicaron 12 medidas (Altura del cuerpo, longitud del brazo, longitud de la pierna, ancho del hombro, diámetro del codo, diámetro de la rodilla, peso corporal, circunferencia del brazo, circunferencia de la pierna, pliegue de la piel de la espalda, pliegue de la piel de la parte superior brazo, pliegue cutáneo del abdomen). Después de realizar la investigación con la aplicación de los procedimientos estadísticos apropiados: análisis descriptivo, análisis de varianza multivariante (MANOVA) y análisis de varianza (ANOVA), se observó que existe una diferencia estadísticamente significativa en el espacio tratado de características antropométricas. Los niños de áreas rurales son más dominantes que los niños de áreas urbanas en la dimensionalidad longitudinal y transversal del esqueleto y en volumen en ciertos segmentos del cuerpo, y los niños de áreas urbanas son más dominantes que los niños de áreas rurales en peso corporal y grasa subcutánea, lo que los pone en riesgo de obesidad.


Subject(s)
Humans , Male , Female , Child , Students , Anthropometry , Socioeconomic Factors , Rural Areas , Analysis of Variance , Urban Area , Education, Primary and Secondary , Montenegro
15.
Article in English | LILACS, BBO | ID: biblio-1431043

ABSTRACT

ABSTRACT Objective: To determine caries prevalence and its association with body mass index in school children between 9-12 years of age in Hail, Saudi Arabia. Material and Methods: This descriptive cross-sectional study included 524 school children 9-12 years of age. These children were selected from 9 Public schools in Hail Province. Dental caries was recorded as per criteria established by the World Health Organization using assessment form for children 2013. Children were weighed using an electronic scale nearest to 0.1 kg with children attired in light clothing and wearing no shoes. The height was measured using a stadiometer to the nearest full centimeter with the children in a standing position. Body Mass Index (BMI) was determined using the formula BMI = kg/m2. Results: Caries prevalence in the population was 86%. The comparisons of mean DMFT between the groups demonstrate higher scores in the overweight group (mean=2.43) compared to normal weight (mean=1.85) and underweight children (mean=1.56) which is statistically significant (p=0.000). Bonferroni Post hoc test to compare the underweight and overweight group (p=0.000) and overweight and normal weight (p=0.000) were highly significant. Conclusion: A positive correlation of caries severity, namely DMFT, with BMI is established.


Subject(s)
Humans , Male , Female , Child , Body Mass Index , Child , DMF Index , Prevalence , Dental Caries/prevention & control , Chi-Square Distribution , Public Health , Cross-Sectional Studies/methods , Analysis of Variance , Statistics, Nonparametric , Dental Caries/etiology , Social Determinants of Health , Sociodemographic Factors
16.
Pesqui. bras. odontopediatria clín. integr ; 23: e210147, 2023. tab, graf
Article in English | LILACS, BBO | ID: biblio-1431045

ABSTRACT

Abstract Objective: To determine the effect of ozonated water on the color stability of denture tooth and denture bases. Material and Methods: Thirty denture base discs consisting of 15 Acropars and 15 ProBase Hot specimens with the dimensions of 40 × 5 mm were prepared. Fifteen denture teeth in shade A1 (Ivoclar Vivadent, Schaan, Liechtenstein) were mounted in a specific acrylic jig. All specimens were immersed in three solutions (1% sodium hypochlorite, ozonated water, and distilled water) for four months (one year of clinical use). Color measurements were done with a spectrophotometer and assessed using the CIE L*a*b* colorimetric system (0, 4, 8, 12, and 16 weeks). Data were analyzed using the three-way ANOVA and Tukey test (α=0.05). Results: Tukey's post hoc test revealed a significant change in color in the Acropars denture base for the distilled water group compared to the ozonated water and 1% hypochlorite (p<0.05). Regarding the ProBase Hot denture base, significantly less color change was observed in the 1% hypochlorite group compared to the ozonated water and distilled water (p≤0.001). For the denture teeth, significantly less color change was seen in the distilled water group than in the ozonated water (p=0.015) and 1% hypochlorite (p<0.05) groups. Conclusion: The color change of denture bases and denture tooth in ozonated water are acceptable. Ozonated water can be considered a good disinfectant for cleaning dentures.


Subject(s)
Ozone/therapeutic use , Color , Dental Polishing , Denture, Complete , Acrylic Resins , Distilled Water , Analysis of Variance , Denture Cleansers/adverse effects , Polymerization
17.
Rev. odontol. UNESP (Online) ; 52: e20220054, 2023. tab, ilus
Article in English | LILACS, BBO | ID: biblio-1442090

ABSTRACT

Introduction: fluoride toothpaste is widely used by the population. Objective: dentifrices with a high concentration of sodium fluoride and the presence of tricalcium phosphate were developed, providing additional protection to patients vulnerable to the development of caries. This study aimed to evaluate the influence of different dentifrices on the surface and internal hardness and enamel wear after artificial caries, pH cycling, and toothbrushing. Material and method: enamel blocks (4x4 mm) were obtained from 20 bovine teeth. The specimens were submitted to artificial caries lesion and then to pH cycling and brushing according to the dentifrice: Colgate Total 12 and Clinpro + Tricalcium Phosphate. Result: after this period, they were submitted to analysis of superficial and internal hardness and profilometry. Scanning Electron Microscopy (SEM) was performed. The data obtained were evaluated by one-way Analysis of Variance (ANOVA) to evaluate the mineral recovery and profilometry, and two-way repeated measures ANOVA to evaluate the superficial and internal hardness. Conclusion: analyzing the surface hardness, after caries induction, there was a significant reduction in hardness that was partially recovered regardless of the dentifrice used. For internal hardness, Clinpro obtained lower values on the control side and up to 90 micrometers on the test side. As for profilometry, Colgate Total 12 showed greater wear when compared to Clinpro. It was concluded that Clinpro promoted lower internal hardness, however, Colgate Total 12 resulted in greater surface wear of tooth enamel.


Introdução: dentifrícios fluoretados são amplamente utilizados pela população. Foram desenvolvidos dentifrícios com alta concentração de fluoreto de sódio e presença de tricálcio fosfato, fornecendo proteção adicional a pacientes vulneráveis ao desenvolvimento da cárie. Objetivo: o objetivo deste estudo foi avaliar a influência de diferentes dentifrícios na dureza superficial, interna e desgaste do esmalte após cárie artificial, ciclagem de pH e escovação. Material e método: blocos de esmalte (4x4 mm) foram obtidos a partir de 20 dentes bovinos. Os espécimes foram submetidos à lesão de cárie artificial e, em seguida, à ciclagem de pH e escovação de acordo com o dentifrício: Colgate Total 12 e Clinpro + Tricálcio Fosfato. Após este período, foram submetidos à análise de dureza superficial e interna e perfilometria. Foi realizada microscopia eletrônica de varredura. Resultado: os dados obtidos foram avaliados por ANOVA um critério para avaliar a recuperação mineral e perfilometria, ANOVA dois critérios medidas repetidas para avaliar a dureza superficial e interna. Conclusão: analisando a dureza superficial, após a indução da cárie houve uma redução significativa na dureza que foi parcialmente recuperada independente do dentifrício utilizado. Para dureza interna, Clinpro obteve valores menores no lado controle e até 90 micrômetros no lado teste. Quanto à perfilometria, o Colgate Total 12 apresentou maior desgaste quando comparado ao Clinpro. Concluiu-se que Clinpro promoveu menor dureza interna, porém, o Colgate Total 12 resultou em maior desgaste superficial do esmalte dentário.


Subject(s)
Animals , Cattle , Tooth Remineralization , Toothpastes , Microscopy, Electron, Scanning , Analysis of Variance , Dental Enamel , Fluorine , Dental Caries , Dentifrices
18.
Rev. odontol. UNESP (Online) ; 52: e20230005, 2023. tab
Article in English | LILACS, BBO | ID: biblio-1522087

ABSTRACT

Introduction: Dentin adhesives provide union between the dental substrate and composite resin, but this union can be influenced by the cleaning agent. Objective: Evaluate the use of ozonated water as a cavity cleaning solution. Material and method: 40 bovine dental crowns were selected, divided into four groups: AD (dentin cleaning with distilled water) and AO (dentin cleaning with ozonized distilled water). Each group was divided into two storage periods (24h and 30 days) kept at 37 °C. The selected universal system adhesive was employed according to the manufacturer's instructions and light cured for 20 seconds. At that time, three cylinders were made (Tygon matrix with an internal diameter of 2 mm and a height of 2 mm) of composite resin in the crowns in the cervical, médium, and incisal regions and light cured for 30 seconds. After storage, the bonding strength was tested by micro-shear, and fracture type analysis was performed. The data were submitted to statistical analysis using the Shapiro-Wilk test with a significance level of 95%, ANOVA, and Turkey. Result: There was a statistically significant difference between the bond strength values, only in the intergroup analysis for the time of 24 hours, between the middle third of the groups (LDAO24 = 2.70 (± 2.39); LDAO30 = 3.82 (± 2.31)). The predominant fracture type for both groups was an adhesive fracture, except in the medium and incisal thirds of the AD, which was a cohesive dentin fracture. Conclusion: The utilization of ozone did not change the bond strength adhesive.


Introdução: Os adesivos dentinários proporcionam união entre o substrato dental e resina composta, porém esta união pode ser influenciada pelo agente de limpeza. Objetivo: Avaliar a influência na resistência de união (RU) de um sistema adesivo universal associado à da água ozonizada como solução de limpeza cavitária. Material e método: Foram selecionadas 40 coroas de dentes anteriores bovinos divididos em 4 grupos: AD (limpeza dentinária com água destilada) e AO (limpeza dentinária com água destilada ozonizada). Cada grupo foi subdividido em outros dois grupos de acordo com o tempo de armazenamento (24h e 30 dias) armazenados a 37ºC. A limpeza dentinária foi realizada por meio de uma seringa de 60mL de cada solução e fricção por 10 segundos. O sistema adesivo universal selecionado foi aplicado de acordo com as instruções do fabricante e fotoativado por 20 segundos. Em seguida, foram confeccionados 3 cilindros (matriz Tygon com um diâmetro interno de 2 mm e 2 mm de altura) de resina composta nas coroas nas regiões cervical, média e incisal e fotoativados por 30 segundos. Após o armazenamento foi realizado o teste de RU por microcisalhamento e análise do tipo de fratura. Os dados coletados foram submetidos a análise estatística através do teste de Shapiro Wilk com nível de significância de 95%, ANOVA e Tukey. Resultado: Houve diferença estatística significativa entre os valores de RU apenas na análise intergrupos para o tempo de 24 horas, entre o terço médio dos grupos (LDAO24 = 2,70 (± 2,39); LDAO30 = 3,82 (± 2,31)). O tipo de fratura predominante para ambos os grupos em todos os tempos foi de fratura adesiva, com exceção ao terço médio e incisal do AD, que foi fratura coesiva de dentina. Conclusão: A utilização do ozônio não alterou a resistência de união adesiva.


Subject(s)
Animals , Cattle , Ozone , Analysis of Variance , Dentin-Bonding Agents , Composite Resins , Shear Strength
19.
Pesqui. bras. odontopediatria clín. integr ; 23: e210236, 2023. tab, graf
Article in English | LILACS, BBO | ID: biblio-1521298

ABSTRACT

ABSTRACT Objective: To analyze the transversal and anterior-posterior changes obtained in patients treated only with the Damon system. Material and Methods: 51 patients with either class I or class II division 1 sagittal relationship treated with the Damon system and the same archwire sequence were retrospectively selected. Dental casts of each patient before (T0) and after treatment (T1) were scanned and analyzed using NEMOCAST 3D software. Inter-molar, inter first-premolar, inter-second premolar and inter-canine distances were measured in both upper and lower arches. Initial and final lateral cephalograms were traced using the OrisCeph program. Pre and post-treatment measurements were compared using the t-test for repeated measurements. The Pearson Correlation Index and Linear Regression Analysis were used to determine the dependence between continuous variables. The significance level was set at 0.05. Results: Transversal diameters in the upper arch increase statistically significantly, especially in the bicuspid area. Initial intra-arch diameter was the only statistically significant variable correlated with the final expansion obtained. A linear negative correlation between the initial latero-posterior torque and the final expansion was observed in both arches. Conclusion: Using identical arches in patients with very different initial characteristics, the changes in bicuspids' diameters remain the most predominant. Patients with initial more negative torque in the posterior region had a higher expansion amount.


Subject(s)
Humans , Male , Female , Orthodontics, Corrective , Orthodontic Brackets , Torque , Malocclusion, Angle Class I/diagnostic imaging , Cephalometry/instrumentation , Cross-Sectional Studies/methods , Regression Analysis , Retrospective Studies , Analysis of Variance
20.
Article in English | LILACS, BBO | ID: biblio-1521296

ABSTRACT

ABSTRACT Objective: To evaluate the efficacy of crestal anesthesia compared to the inferior alveolar nerve block (IANB) in 6-9-year-old children undergoing tooth extraction. Material and Methods: This case-control study was conducted on 70 children who needed bilateral mandibular primary molar extractions. The Faces Pain Scale was used to determine the efficacy of the anesthetic technique. Demographic data, onset time of anesthesia, duration of anesthesia, and blood pressure were also recorded. The data were analyzed using SPSS 25 and analytical tests: t-test, chi-squared test, and one-way ANOVA. The level of significance was set at p<0.05. Results: The efficacy of the IANB was significantly higher than the crestal anesthesia (p<0.05). The duration of IANB anesthesia was significantly more than the crestal anesthesia (p<0.05). The two anesthetic techniques showed no significant differences in pediatric blood pressure as a determinant of the pain evoked in children during the injection (p>0.05). Conclusion: Crestal anesthesia proved an effective method to extract primary molars. However, further studies are necessary to confirm this.


Subject(s)
Humans , Male , Female , Child , Tooth Extraction , Child , Anesthesia, Dental/methods , Molar/anatomy & histology , Nerve Block , Case-Control Studies , Chi-Square Distribution , Analysis of Variance
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