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Article in Spanish | LILACS-Express | LILACS, BDNPAR | ID: biblio-1423752


Introducción: El tratamiento de los canales radiculares de molares temporales con pulpas infectadas ha sido ampliamente descrito y motivo de discusión por muchos años, no existiendo aún un consenso en cuanto al material de obturación. La pasta CTZ (cloranfenicol, tetraciclina y óxido de zinc más eugenol) acompañada de la Técnica de Endodoncia No Instrumentada ha mostrado una alta efectividad clínica y radiográfica para el tratamiento de molares temporales con compromiso pulpar. Se ha propuesto el reemplazo del componente Tetraciclina por Doxiciclina de la formulación, por las implicancias de un posible amelo-génesis imperfecta y la coloración en la corona de dicho componente. Objetivo. Evaluar la efectividad clínica de la pasta CDZ en el tratamiento endodóntico de dientes primarios necrosados con una técnica mínimamente invasiva. Metodología. Estudio de intervención en el que se incluyeron pacientes que presentaban dientes temporales con indicación de terapia pulpar y en quienes se utilizó la pasta CDZ. El éxito del tratamiento se midió por la desaparición de la sintomatología. Resultados. Se incluyeron en el estudio 76 pacientes entre 2 a 9 años. La eficacia del tratamiento con CDZ fue del 97,6% en 125 dientes. Conclusiones. Los hallazgos son comparables a los estudios que utilizaron el CTZ. Debido a las características biológicas del material, su bajo costo, fácil manipulación y excelentes resultados clínicos, se considera una opción en la terapia pulpar en dientes temporales, como una alternativa en el uso de programas de salud pública.

Introduction: Treatment of root canals of primary molars with infected pulps has been widely described and has been the subject of discussion for many years, and there is still no consensus regarding the filling material. The CTZ paste (chloramphenicol, tetracycline and zinc oxide plus eugenol) accompanied by the Non-Instrumented Endodontic Technique has shown high clinical and radiographic effectiveness for the treatment of primary molars with pulp involvement. The replacement of the Tetracycline component by Doxycycline of the formulation has been proposed, due to the implications of a possible amelogenesis imperfecta and the coloration in the crown of said component. Goal. To evaluate the clinical effectiveness of CDZ paste in the endodontic treatment of necrotic primary teeth with a minimally invasive technique. Methodology: Intervention study in which patients with temporary teeth with an indication for pulp therapy and in whom CDZ paste was used were included. Treatment success was measured by the disappearance of symptoms. Results. 76 patients between 2 and 9 years old were included in the study. The efficacy of CDZ treatment was 97.6% in 125 teeth. Conclusions: The findings are comparable to studies using CTZ. Due to the biological characteristics of the material, its low cost, easy handling and excellent clinical results, it is considered an option in pulp therapy in primary teeth, as an alternative in the use of public health programs.

Tooth , Amelogenesis Imperfecta , Staining and Labeling
The Nigerian Health Journal ; 23(1): 473-477, 2023. tables, figures
Article in English | AIM | ID: biblio-1425497


Background: The aim of this study is to determine sexual dimorphism using anterior teeth measurements and its use as an ancillary tool for sexual determination. Methods:In this study, the measurements of the anterior teeth were carried out on one hundred and forty students (80M: 60F) of the University of Port-Harcourt ranging from 15-30 years. The mesiodistal diameter of the central and lateral incisors, right and left canines and their inter-canine distance were measured. These measurements were done with the aid ofa digital Vernier caliper. Also, the percentages of sexual dimorphism were calculated. The values were subjected to statistical analysis.Results:The mean mesiodistal central incisor (MDCI) value for males was 9.78 ± 0.47mm while that of the females was 9.29±0.46mm. The mean mesiodistal lateral incisor (MDLI) value for males was 7.80 ±0.54mm while that of the females was 7.40±0.54mm. The mean mesiodistal right canine (MDRC) value for males was 7.43±0.49mm while that of the females was 7.04±0.40mm. The mean mesiodistal left canine (MDLI) value for males was 7.39±0.51mm while that of the females was 7.03±0.55mm. The mean mandibular inter-canine distance (MICD) value for males was 33.73±1.15mm while that of the females was 32.23±0.98mm. They were all statistically significantat p<0.05.Conclusion:It can be concluded that the incisors and the canines are useful tools in sex determination. The data obtained can be useful in maxillofacial reconstructive surgery

Humans , Tooth , Sex Characteristics , Oral Surgical Procedures , Anthropology, Medical
Braz. dent. sci ; 26(1): 1-9, 2023. ilus
Article in English | LILACS, BBO | ID: biblio-1413593


Although much progress has been obtained in terms of the Endodontic treatment, the literature shows that true success can be only achieved with adequate coronal seal to avoid bacterial contamination, and protect the tooth structure from fracture. There are many options available to the clinician to restore the endodontically treated tooth; however, there is not much evidence available on what alternative is better than another. This review will critically present the current knowledge on restorative choices, including posts and endocrowns, showing advantages and disadvantages of different treatment forms. With this knowledge, we will also introduce the concept of biomimetics to endodontically treated teeth, and how the nature of their remaining tooth structure can benefit from this approach. This concept entails the use of mechanisms and biologically produced materials to restore a tooth in a way that would mimic its natural structure, with the purpose of achieving better long-term prognosis (AU)

Embora tenha se obtido progresso em relação ao tratamento endodôntico, a literatura mostra que o sucesso real só pode ser atingido com o selamento coronal adequado, para evitar-se a contaminação bacteriana e proteger-se a estrutura dental de fraturas. Há muitas opções disponíveis para o clínico para a restauração do dente tratado endodonticamente; entretanto, não há muita evidência disponível sobre qual alternativa é melhor que a outra. Esta revisão apresentará criticamente o conhecimento atual sobre opções restauradoras, incluindo retentores intraradiculares e endocrowns, mostrando vantagens e desvantagens das diferentes formas de tratamento. Com esse conhecimento, também introduziremos o conceito de biomimética, uma vez que dentes tratados endodonticamente, devido a natureza de sua estrutura dental remanescente, podem se beneficiar desta abordagem. Esse conceito envolve o uso de mecanismos e materiais produzidos biologicamente para restaurar um dente de forma a imitar a estrutura natural, com o objetivo de alcançar melhor prognóstico de longo-prazo.(AU)

Tooth , Biomimetics , Endodontics , Fractures, Bone
Braz. j. oral sci ; 21: e222812, jan.-dez. 2022. tab
Article in English | LILACS, BBO | ID: biblio-1348712


Aim: To evaluate the influence of the parameters L* a* b* on the variation of the color of bovine tooth enamel submitted to artificial darkening, after simulated brushing, with whitening toothpastes containing blue covarine. Methods: To undertake this study in vitro, 60 specimens (SP) were divided into 6 groups (n=10): control group (CGwater) and 5 test groups (GT1-Colgate Total 12, GT2-Oral-B 3D White Perfection, GT3- Colgate Luminous Instant White, GT4-CloseUp White Diamond Attraction, GT5-Sorriso Xtreme White). The specimens were darkened with coffee and submitted to simulated brushing for 6, 12, and 24 months. The alteration in the color was evaluated using CIELAB parameters and the ΔL, Δa, Δb and ΔE were calculated. The data was analyzed through generalized linear models using the R program and considering a level of significance of 5%. Results: The parameters L*, a* and the ΔL, Δa obtained better results in the test group than in the control group. There were no statistical differences between CG and the test groups for the evaluation of the b* parameter. In the evaluation of the Δb, the GT3 differed statistically from the CG. In relation to the ΔE, all the group tests showed a variation in color statistically greater than that of the CG and the GT4 showed the greatest variation, not differing from the GT3 during the periods studied. Conclusion: The mechanical and optical whitening agents positively influenced the values L*a* and b*, as well as in its variations and in the ΔE. It is important to emphasize, however, that to analyze tooth whitening it is necessary to evaluate their parameters together

Tooth , Toothpastes , Color , Bleaching Agents
J. Health Biol. Sci. (Online) ; 10(1): 1-5, 01/jan./2022.
Article in English | LILACS | ID: biblio-1411517


Objective: Understand whether the collection site (toothless or toothless) influences the frequency of bacteria in the oral cavity. It was performed as an observational, prospective, and cross-sectional study. Methods: Clinical samples of the oral surfaces of the teeth and/or cheek mucosa were collected in the oral cavity of 37 patients who underwent elective cardiac surgery in the preoperative period from May to July 2019. The clinical samples collected were subjected to identification of colonies and antimicrobial sensitivity tests. Results: It was observed that regardless of whether the collection site is toothless or toothless, the microbial profile, socio-demographic variables, comorbidities, and risk factors do not statistically influence the choice of the collection site. Conclusions: there wasn't statistical difference between the strains found at the collection sites. Practical Implications: the result found is relevant for other researchers that will work with oral cavity collections since the chosen collection site will not influence the frequency of strains found.

Objetivo: Compreender se o local de coleta (com dentes ou desdentado) influencia na frequência de bactérias na cavidade oral. Foi realizado como um estudo observacional, prospectivo e transversal. Métodos: Amostras clínicas das superfícies orais dos dentes e/ou mucosa jugal foram coletadas na cavidade oral de 37 pacientes submetidos à cirurgia cardíaca eletiva no período pré-operatório de maio a julho de 2019. As amostras clínicas coletadas foram submetidas à identificação de colônias e testes antimicrobianos de sensibilidade. Resultados: Observou-se que independente do local de coleta ser dentado ou desdentado, o perfil microbiano, variáveis sociodemográficas, comorbidades e fatores de risco não influenciam estatisticamente na escolha do local de coleta. Conclusões: Não houve diferença estatística entre as cepas encontradas nos locais de coleta. O resultado encontrado é relevante para outros pesquisadores que trabalharão com coletas de cavidade oral, pois o local de coleta escolhido não influenciará na frequência de cepas encontradas.

Dental Plaque , Mouth , Bacteria , Tooth , Oral Health , Biofilms , Infections
Acta odontol. Colomb. (En linea) ; 12(2): 61-77, Jul-Dec. 2022. tab, graf
Article in Spanish | LILACS | ID: biblio-1397171


Objetivo: establecer los parámetros para la evaluación visual e instrumental del color dental en estudios in-vitro a partir de la literatura científca publicada entre 2015 y 2021. Métodos: se realizó la búsqueda en las bases de datos: PubMed, Web of Science, Science Direct, Scopus, Scielo y Lilacs; también en el motor de búsqueda Google Académico y las bibliotecas de las editoriales Wiley y Springer. Las palabras clave utilizadas fueron tooth, color, in-vitro, color perception, shade matching, thresholds, appearance, surrounding, "CIELAB" y "CIEDE2000". Teniendo en cuenta los criterios de elegibilidad, se seleccionaron los estudios de acuerdo al título, resumen y texto completo. Resultados: la búsqueda arrojó un total de 37 publicaciones que se agruparon en tres tópicos: 1. toma de color visual: condiciones ambientales, observadores y nivelación; 2. toma de color instrumental: instrumentos; y 3. procesamiento de datos: cálculo de la diferencia de color y umbrales de perceptibilidad (PT) y aceptabilidad (AT). Conclusiones: los aspectos más importantes en la evaluación visual son la iluminación, el ambiente para registro (sitio, entorno y fondo alrededor de la muestra), las condiciones geométricas de visualización, los observadores y el uso de guías. En la evaluación instrumental es relevante elegir el aparato apropiado de acuerdo con su precisión y reproducibilidad, como los espectroradiómetros y los espectrofotómetros de uso clínico. Se presenta el procesamiento de datos para establecer las variaciones de cada coordenada, las diferencias de color (ΔE): CIELAB y CIEDE2000, los umbrales y los lineamientos.

Objective: To establish the parameters for the visual and instrumental evaluation of tooth color in in-vitro studies based on the scientifc literature published between 2015 and 2021. Methods: The search was carried out in the databases of PubMed, Web of Science, Science Direct, Scopus, Scielo, Lilacs; search engine Google Scholar and publishers' library of Wiley and Scielo, using the keywords "tooth", "color", "in vitro", "color perception", "shade matching", "thresholds", "appearance", "surrounding", "CIELAB", and "CIEDE2000". The literature was selected according to the title, abstract and full text taking into the eligibility criteria. Results: It yielded a total of 37 publications, which were grouped into three topics: 1. visual color acquisition: environmental conditions for color acquisition, observers and levelling. 2. instrumental color sampling: instruments. 3. Data processing: Calculation of color diference and perception thresholds (PT) and acceptability thresholds (AT). Conclusions: The most important aspects in the visual assessment are lighting, the environment for color registration (site, environment and background around the sample), the geometric conditions of visualization, the observers and the use of guides. Regarding the instrumental assessment of color, the appropriate devices must be chosen according to its precision and reproducibility, being the spectrophotometers and spectroradiometers the most precise ones. It is presented how the data processing is carried out to establish the variations of each coordinate, the color diferences (ΔE): CIELAB and CIEDE2000, thresholds and guidelines.

Tooth , Color Perception , In Vitro Techniques , Differential Threshold
An. Fac. Cienc. Méd. (Asunción) ; 55(2): 105-111, 20220801.
Article in Spanish | LILACS | ID: biblio-1380455


Introducción: El presente artículo ahonda en las teorías más aceptadas sobre el proceso de erupción dental en la literatura de hoy en día y, desde este enfoque, expone el caso clínico de una paciente de 12 años de edad que presentaba retención de caninos y molares temporales. A dicha paciente se le trató clínicamente mediante exodoncias seriadas y se muestra su evolución posterior al tratamiento dental. Objetivos: Lograr entender de mejor manera el proceso de la erupción dental en base a la actual bibliografía. Materiales y métodos: Se realizó una revisión bibliográfica con palabras claves: "erupción dental", "extracciones seriadas", "retención dental" y "evolución dental". La paciente fue evaluada y tratada ortodóncicamente, mediante extracciones seriadas y se realizaron controles dentales periódicos con toma de radiografía panorámica para evaluar su evolución. Conclusión: El folículo dental y el retículo estrellado son las estructuras encargadas de generar el proceso eruptivo del diente mediante la interacción de diversas moléculas. Estas moléculas deben encajar dentro de un contexto para que cada diente erupcione de manera independiente.

Introduction: This article delves into the most accepted theories about the dental eruption process in today's literature and, from this perspective, presents the clinical case of a 12-year-old patient who presented retention of temporary canines and molars. This patient was treated clinically by means of serial extractions and her evolution after dental treatment is shown. Objectives: This article delves into the most accepted theories about the dental eruption process in today's literature and, from this perspective, presents the clinical case of a 12-year-old patient who presented retention of temporary canines and molars. This patient was treated clinically by means of serial extractions and her evolution after dental treatment is shown. Materials and methods: A bibliographic review was carried out with key words: "dental eruption", "serial extractions", "dental retention" and "dental evolution". The patient was evaluated and treated orthodontically by serial extractions and periodic dental check-ups were carried out with panoramic radiography to evaluate her evolution. Conclusion: The dental follicle and the stellate reticulum are the structures responsible for generating the eruptive process of the tooth through the interaction of various molecules. These molecules must fit into a context for each tooth to erupt independently.

Tooth Eruption , Tooth
Rev. Círc. Argent. Odontol ; 80(231): 19-23, jul. 2022. ilus
Article in Spanish | LILACS | ID: biblio-1392286


En el campo de la odontología, prevalecen actualmente alternativas terapéuticas con una filosofía conservadora. Sin embargo, con el advenimiento de los tratamientos con células madre (CM), se amplían las posibilidades terapéuticas, que buscan la combinación y el equilibrio entre la intervención tradicional y las posibilidades de reposición de estructuras anatómicas dañadas, a través de la regeneración de tejidos utilizando células madre o sus derivados (AU)

In the dentistry field, therapeutic alternatives with a conservative philosophy currently prevail. However, with the advent of stem cell (SC) treatments, therapeutic possibilities are expanding, seeking a combination and balance between traditional intervention and the pos- sibility of replacing damaged anatomical structures through tissue regeneration, using stem cells or their derivatives (AU)

Humans , Stem Cells , Tissue Engineering , Mesenchymal Stem Cells/physiology , Periodontal Ligament/physiology , Regeneration/physiology , Tooth/cytology , Tooth Germ/physiology , Biocompatible Materials/therapeutic use , Bone Regeneration/physiology , Dental Pulp/physiology , Tissue Scaffolds , COVID-19/therapy
Rev. cuba. estomatol ; 59(2): e3743, abr.-jun. 2022. graf
Article in Spanish | LILACS, CUMED | ID: biblio-1408390


Introducción: El "diente rosado" es un fenómeno post mortem. Se caracteriza por una tonalidad rosa, rojiza y hasta púrpura, que puede observarse en los dientes. Su primera referencia se remite a 1829, cuando Thomas Bell lo describió, y genera polémica desde hace casi dos siglos. La temática plantea varias interrogantes: ¿sería más lógico nombrarlo "red teeth" o "purple teeth"?, ¿qué provoca esa tonalidad más intensa?, ¿la coloración rosada indica determinada causa de muerte?, ¿queda para siempre o puede desaparecer por diversos factores? Objetivo: Describir los indicadores de que el "diente rosado" o "pink teeth" pueda aún ser considerado un elemento importante para la investigación forense actual. Comentarios principales: Luego de la experiencia acumulada con los casos trabajados durante los últimos 20 años y la revisión bibliográfica realizada, se evidencia que el fenómeno aparece sobre todo en las piezas dentales anteriores y premolares monorradiculares. Además, puede verse tanto ante mortem como post mortem. Por causas diferentes el post mortem necesita de varios días para instaurarse y es un evento tafonómico, evidenciable tanto en muertes violentas como naturales, aunque la variación en su tonalidad depende de diversos factores. Consideraciones globales: Teniendo en cuenta la experiencia obtenida por los autores, y lo referido en la bibliografía sobre el tema, se evidencia que este signo, fenómeno o hallazgo (al aclararse las interrogantes planteadas) aún puede ser muy significativo y orientador en el contexto forense actual(AU)

Introduction: "Pink teeth" are a post-mortem phenomenon characterized by a rose, reddish and even purple shade of color which may be observed in teeth. Their first reference dates back to 1829, when Thomas Bell described them. They have been a topic of debate for almost two centuries. The subject poses several questions: Would it be more logical to name them "red teeth" or "purple teeth"? What causes the increase in color intensity? Does the pink shade signal a specific cause of death? Does it remain forever or may it disappear for a variety of reasons? Objective: Describe the indicators that "pink teeth" may still be considered an important element in current forensic research. Main remarks: Based on the experience gathered from the cases analyzed in the last 20 years and the bibliographic review conducted, it is evident that the phenomenon appears mainly in anterior teeth and single-rooted premolars. On the other hand, pink teeth may be observed ante mortem as well as post mortem. For a number of reasons, post mortem pink teeth take several days to form, and they are a taphonomic phenomenon, present in violent as well as natural deaths, though their change in tone depends on various factors. General considerations: Founded on the experience obtained by the authors and the bibliography about the topic, it is evident that this sign, phenomenon or finding (upon clarification of the questions posed) may still be very significant and enlightening in the current forensic context(AU)

Humans , Postmortem Changes , Tooth/pathology , Forensic Dentistry/methods , Chronology as Topic
Rev. cienc. salud (Bogotá) ; 20(2): 1-16, 20220510.
Article in Spanish | LILACS, COLNAL | ID: biblio-1427181


Introducción: este trabajo buscó determinar la exactitud y precisión de los métodos dentales para estimar la edad, basados en la transparencia de la dentina radicular. Materiales y métodos: estudio transversal de tipo comparativo en el que se evaluaron 90 dientes unirradiculares de una muestra peruana de 90 cadáveres adultos masculinos. En cada diente se midió la altura de la periodontosis, altura radicular y longitud de la transparencia de la dentina radicular. Con estas medidas se hallaron las edades dentales de acuerdo con los métodos de Prince-Ubelaker, Ubelaker-Parra y Vilcapoma, y se compararon los resultados entre sí y con la edad cronológica (edad real). Debido a la normalidad de los datos y a su homocedasticidad, se utilizó la prueba de Pearson, el Anova de un factor para muestras relacionadas y la prueba de Tukey. La exactitud se evaluó mediante las diferencias entre las edades cronológicas y las estimadas por cada método, y la precisión se obtuvo del análisis de confiabilidad y repetibilidad, mediante diagramas de Bland-Altman. El nivel de significancia fue 0.05. Resultados: las exactitudes y precisiones fueron de 0.15-0.14, 2.18-2.07, 3.5-3.11 y 9.92-9.82 para los métodos de Vilcapoma, Ubelaker-Parra, Prince-Ubelaker para masculinos blancos y Prince-Ubelaker para para masculinos negros, respectivamente. Conclusiones: el método de Vilcapoma tuvo mayor exactitud y precisión para estimar la edad.

Objective: To determine the accuracy and precision of dental methods for age estimation based on transparency of root dentin. Materials and Methods: Transversal study of comparative type where 90 uniradicular teeth of a Peruvian sample of 90 male adult corpses were evaluated. In each tooth was mea-sured: height of periodontosis, root height and height of transparency of root dentin. With these mea-surements the dental ages were found according to the methods of Prince-Ubelaker, Ubelaker-Parra and Vilcapoma, comparing the results with each other and with the chronological age (real age). Due to the normality of the data and its homocedasticity, the Pearson test, the one-factor Anova for related samples and the Tukey test were used. Accuracy was evaluated by differences between chronological and esti-mated ages for each method and accuracy was obtained from reliability and repeatability analysis using Bland-Altman diagrams. The significance level was 0.05. Results: Accuracy and precision were 0.15-0.14, 2.18-2.07, 3.5-3.11 and 9.92-9.82 for the Vilcapoma, Ubelaker-Parra, Prince-Ubelaker for white males and Prince-Ubelaker for black males, respectively. Conclusions: The Vilcapoma method had greater accuracy and precision in estimating age.

Objetivo: determinar a precisão e a exatidão dos métodos odontológicos para a estimativa da idade com base na transparência da dentina radicular. Materiais e métodos: estudo transversal comparativo onde foram avaliados 90 dentes uniradiculares de uma amostra peruana de 90 cadáveres masculinos adultos. Cada dente foi medido para: altura da periodontose, altura da raiz e comprimento da transparência da dentina radicular. Com estas medidas foram encontradas as idades dentárias de acordo com os métodos de Prince-Ubelaker, Ubelaker-Parra e Vilcapoma, comparando os resultados entre si e com a idade cro-nológica (idade real). Devido à normalidade dos dados e sua homocedasticidade, foram utilizados o teste Pearson, a anova de um fator para amostras relacionadas e o teste Tukey. A exatidão foi avaliada pelas diferenças entre as idades cronológicas e as estimadas por cada método e a exatidão foi obtida a partir da análise de confiabilidade e repetibilidade usando diagramas de Bland-Altman. O nível de significância foi de 0,05. Resultados: precisão e exatidão foram 0,15-0,14, 2,18-2,07, 3,5-3,11 e 9,92-9,82 para os métodos Vilcapoma, Ubelaker-Parra, Prince-Ubelaker para os homens brancos e Prince-Ubelaker para os homens negros, respectivamente. Conclusões: o método Vilcapoma foi mais preciso e exato na estimativa da idade.

Humans , Adult , Tooth , Health , Analysis of Variance , Dentin , Men , Methods
Rev. Flum. Odontol. (Online) ; 1(57): 1-8, jan.-abr. 2022.
Article in Portuguese | LILACS, BBO | ID: biblio-1391233


O Banco de Dentes Humanos (BDH) é uma instituição sem fins lucrativos, vinculada a uma faculdade, universidade ou instituição com o propósito de suprir as necessidades acadêmicas, através do fornecimento de dentes humanos para estudo e treinamento laboratorial dos alunos dos cursos de graduação e pós-graduação. Assim, o presente trabalho teve como objetivo relatar os métodos utilizados para captação, tratamento, seleção, preservação, armazenamento e reutilização de dentes humanos extraídos, realizados por alunos da Faculdade de Odontologia (FO) da Universidade Federal Fluminense (UFF) através de dois projetos deferidos junto a PROAES-UFF. Para isso, foram realizadas campanhas de conscientização e programas de divulgação para a doação de dentes humanos extraídos permanentes e decíduos tanto para a comunidade científica odontológica como para a comunidade leiga. Após 24 meses, foram captados um total de 2.536 dentes, sendo 346 molares superiores, 279 molares inferiores, 262 pré-molares superiores, 418 pré-molares inferiores, 343 caninos, 296 incisivos superiores e 592 incisivos inferiores. As campanhas e ações dos projetos da PROAES-UFF foram eficientes para coletar dentes humanos, suprindo as atividades laboratoriais de diversas disciplinas na graduação e também servindo de estoque para a futura implementação do BDH da FO-UFF.

The Human Teeth Bank (HTB) is a non-profit institution, linked to a college, university or institution with the purpose of meeting academic needs, through the provision of human teeth for study and laboratory training of undergraduate and postgraduate students. Thus, this study aimed to report the methods of capture, treatment, selection, preservation, storage and reuse of extracted human teeth, carried out by students from the Faculty of Dentistry (FO) of Universidade Federal Fluminense (UFF) through two projects approved by PROAES-UFF. To this end, awareness campaigns and outreach programs were carried out for the donation of human teeth extracted, permanent and deciduous, both for the dental scientific community and for the lay community. After 24 months, a total of 2,536 teeth were captured, with 346 upper molars, 279 lower molars, 262 upper premolars, 418 lower premolars, 343 canines, 296 upper incisors and 592 lower incisors. The campaigns and actions of PROAES-UFF projects were efficient in collecting human teeth, supplying the laboratory activities of several disciplines during graduation and also serving as a stock for a future implementation of the HTB of FO-UFF.

Schools, Dental , Specimen Handling , Tooth , Planning Techniques
African Journal of Dentistry and Implantology ; 22: 8-12, 2022. tales, figures
Article in French | AIM | ID: biblio-1399959


Le diastème du grec diastèmà (interstice) se définit comme étant l'existence d'espace entre les dents d'une même arcade. Les objectifs de l'étude étaient de déterminer le profil épidémiologique des diastèmes; décrire les formes cliniques rencontrées, assurer une prise en charge. PATIENTS ET MÉTHODE: Il s'agissait d'une étude prospective de type descriptif effectuée à l'hôpital national Donka, elle avait duré sept mois, allant du 1er Mars au 30 septembre 2019. RÉSULTATS: Le sexe féminin prédominait avec 77,7% contre 22,2 % de sexe masculin, donnant un ratio (f/h) = 3,5. La tranche d'âge de 21-23 ans (tout sexe confondu) était la plus représentée avec un pourcentage de 44,4%. La tonicité du frein labial médian avec 29,62% était l'étiologie principale du diastème inter incisif. Le diastème était plus fréquent au maxillaire avec des valeurs respectives de 33,33% de diastème des dents du bloc incisivo canin et 29,62% de diastème inter incisif soit au total 62,96 %. Le traitement fut chirurgical, orthodontique et prothétique. CONCLUSION:Le diastème reste l'une des anomalies orthodontiques fréquente dans nos pays. Considéré par certains comme un excès de place sur l'arcade dentaire, il est cependant apprécié par d'autres, surtout en Afrique de l'ouest où il est souvent considéré par la population comme signe de chance, de beauté, d'où son impact socio-culturel.

Humans , Tooth , Diastema , Therapeutics , Health Profile , Off-Label Use
Rev. odontopediatr. latinoam ; 12(1): 202522, 2022. tab, graf
Article in Spanish | LILACS, COLNAL | ID: biblio-1417074


El cepillado dental es el método tradicional reconocido para eliminar la biopelícula. Objetivo: Evaluar la relación entre edad y cepillado dental, así como la asociación entre hábitos de cepillado dental y presencia de caries en un grupo de escolares de Montevideo, Uruguay. Material y métodos: Se realizó un estudio observacional, transversal, analítico, en 127 escolares de 4 a 11 años de edad, en Montevideo, Uruguay. Se realizó una encuesta a los padres en relación a los hábitos de cepillado dental de sus hijos y se estudiaron las variables tiempo de cepillado, Índice de Higiene Oral simplificado y se registró el índice para caries dental ICDAS. Resultados: La edad media de los participantes fue 7,93 años (DS ± 1,95). El tiempo promedio de cepillado fue de 47 segundos (DS ± 27 segundos). Los tiempos de cepillado que reportaron los padres difirieron significativamente de los observados en los niños. Al aumentar la edad, el tiempo de cepillado también aumentaba. Se ajustó un modelo de regresión múltiple para analizar la relación entre la disminución en la magnitud del IHOS debido al cepillado y las variables edad, género, tiempo de cepillado y ayuda en el cepillado. Se verificó asociación entre las variables ayuda y/o supervisión en el cepillado y presencia o no de caries dental. Conclusiones: Se encontró una relación significativa entre cepillado dental, edad y tiempo de cepillado en la población estudiada. A mayor edad, mayor tiempo de cepillado y mejor resultado en el índice de higiene oral. Los niños que recibían supervisión o ayuda de los padres fueron los que presentaron menos lesiones de caries.

A escovação dentária é o método tradicional reconhecido para a remoção do biofilme. Objetivo: Avaliar a relação entre idade e escovação dentária, bem como a associação entre hábitos de escovação dentária e a presença de cáries em um grupo de escolares em Montevidéu, Uruguai. Material e métodos: Um estudo observacional, transversal, analítico foi realizado em 127 escolares de 4 a 11 anos, em Montevidéu, Uruguai. Foi realizada um levantamento dos pais sobre os hábitos de escovação dentária de seus filhos e as variáveis foram estudadas para o tempo de escovação, índice simplificado de higiene bucal e o índice de cárie dentária do ICDAS. Resultados: A idade média dos participantes foi de 7,93 anos (DS s 1,95). O tempo médio de escovação foi de 47 segundos (DS x 27 segundos). Os tempos de escovação relatados pelos pais diferiram significativamente daqueles observados nas crianças. À medida que a idade aumentava, o tempo de escovação também aumentava. Um modelo de regressão múltipla foi ajustado para analisar a relação entre a diminuição da magnitude do IHOS devido à escovação e as variáveis de idade, sexo, tempo de escovação e auxílio de escovação. Houve associação entre as variáveis ajuda e/ou supervisão na escovação e presença ou não de cárie dentária Conclusões: Verificou-se uma relação significativa entre escovação dentária, idade e tempo de escovação na população estudada. Quanto mais velho, maior o tempo de escovação e melhor resultado no índice de higiene bucal. As crianças que receberam a supervisão ou a ajuda dos pais eram essas com menos os ferimentos da cavidade

Dental brushing is the recognized traditional method for removing the biofilm. Objective: To evaluate the relationship between age and toothbrushing, as well as the association between toothbrushing and caries lesions in schoolchildren in Montevideo, Uruguay. Material and methods: An observational, cross sectional and analytic study was carried on 127 schoolchildren aged 4 to 11 years old, in Montevideo, Uruguay. The parents were asked about the oral health habits of their children through a questionnaire, and the variables toothbrushing time, Simplified Oral Hygiene Index and ICDAS index were registered. Results: Mean age of the children was 7,93 years (SD ± 1,95). Mean time of toothbrushing was 47 seconds (DS ± 27 seconds). The toothbrushing times reported by the parents differed significantly from those observed in the children. As age increased, brushing time also increased. A multiple regression model was adjusted to analyze the relationship between the decrease in the magnitude of IHOS due to toothbrushing and the variables age, toothbrushing time and brushing aid. There was an association between the variables help and / or supervision in brushing and presence or not of dental caries. Conclusions: A significant relationship was found between toothbrushing, age, gender and brushing time in this group of children. When the age was higher, they spent more time brushing their teeth and they had better results in oral hygiene index. Children who had parents help or supervision had lower caries lesions

Humans , Male , Female , Child, Preschool , Child , Toothbrushing , Oral Hygiene Index , Oral Hygiene , Tooth , Oral Health , Biofilms , Richter Scale , Dental Caries , Insemination, Artificial, Heterologous
Int. j. morphol ; 40(2): 407-413, 2022. ilus
Article in English | LILACS-Express | LILACS | ID: biblio-1385603


SUMMARY: This study aims to extract teeth and alveolar bone structures in CBCT images automatically, which is a key step in CBCT image analysis in the field of stomatology. In this study, semantic segmentation was used for automatic segmentation. Five marked classes of CBCT images were input for U-net neural network training. Tooth hard tissue (including enamel, dentin, and cementum), dental pulp cavity, cortical bone, cancellous bone, and other tissues were marked manually in each class. The output data were from different regions of interest. The network configuration and training parameters were optimized and adjusted according to the prediction effect. This method can be used to segment teeth and peripheral bone structures using CBCT. The time of the automatic segmentation process for each CBCT was less than 13 min. The Dice of the evaluation reference image was 98 %. The U-net model combined with the watershed method can effectively segment the teeth, pulp cavity, and cortical bone in CBCT images. It can provide morphological information for clinical treatment.

RESUMEN: El objetivo del presente estudio fue extraer estructuras dentarias y óseas alveolares desde imágenes CBCT automáticamente, lo cual es un paso clave en el análisis de imágenes CBCT en el campo de la estomatología. En este estudio, se utilizó la segmentación de tipo emántica para la segmentación automática. Se ingresaron cinco clases de imágenes CBCT marcadas, para el entrenamiento de la red neuronal U-net. El tejido duro del diente (incluidos esmalte, dentina y cemento), la cavidad de la pulpa dentaria, hueso cortical, hueso esponjoso y otros tejidos se marcaron manualmente en cada clase. Los datos se obtuvieron de diferentes regiones de interés. La configuración de la red y los parámetros de entrenamiento se optimizaron y ajustaron de acuerdo con un análisis predictivo. Este método se puede utilizar para segmentar dientes y estructuras óseas periféricas mediante CBCT. El tiempo del proceso de segmentación automática para cada CBCT fue menor a 13 min. El "Dice" de evaluación de la imagen de referencia fue de 98 %. El modelo U-net combinado con el método "watershed"puede segmentar eficazmente los dientes, la cavidad pulpar y el hueso cortical en imágenes CBCT. Puede proporcionar información morfológica para el tratamiento clínico.

Humans , Tooth/diagnostic imaging , Dental Pulp/diagnostic imaging , Cone-Beam Computed Tomography , Tooth/anatomy & histology , Artificial Intelligence , Dental Pulp/anatomy & histology , Nerve Net
Int. j. morphol ; 40(2): 530-539, 2022. ilus, tab
Article in Spanish | LILACS-Express | LILACS | ID: biblio-1385613


RESUMEN: En salmonicultura se utilizan imágenes de rayos X, para evaluar la columna vertebral y las aletas, pero estas no permiten cuantificar los minerales que constituyen el hueso, para esto se utilizan otras técnicas que son destructivas. La Microscopía Electrónica de Barrido de presión variable (VP SEM) acoplada al detector espectroscopia de rayos X de energía dispersiva (EDX) acoplado, nos permite analizar la microestructura y a la vez determinar elementos químicos, porcentaje y distribución presentes en puntos específicos en una muestra. Se utilizaron 5 truchas control y 5 con deformidad mandibular, de agua dulce en etapa de smolt, se analizó la estructura y mineralización del hueso, se eligieron en promedio 6 puntos de cuantificación por región de interés y se analizaron mediante Microscopía Electrónica de Barrido (VP SEM-EDX). Los datos obtenidos muestran porcentaje en masa de Ca promedio en hueso articular de truchas fueron de 8.07 % y de 14.48 % en truchas con deformidad mandibular y control respectivamente y el porcentaje en masa promedio de P es de 4.07 % y 7.60 %, en truchas con deformidad mandibular y control respectivamente. Se identificó además otros elementos presentes en la muestra como Mg, Na, C, O, N, S, F, Zn, Al y Fe, con especial interés en el aumento de carbono en las muestras analizadas con deformidad mandibular y la presencia de aluminio en todas las muestras. La Técnica de VP SEM-EDX, permite evaluar de forma directa, sin destrucción de la muestra y con una preparación mínima de la muestra. En el hueso, la aplicación más frecuente de SEM-EDX es la medición del contenido de Ca y P y la relación que existe entre estos elementos Ca/P, en la muestra. Paralelamente la técnica nos permite la detección de otros microelementos provenientes del agua o de la alimentación y que eventualmente pueden provocar alteraciones en los peces, confirmando la hipótesis que el microanálisis elemental tiene utilidad para la salmonicultura.

SUMMARY: In salmon farming systems, X-ray images are used to evaluate the spine and fins, but these do not allow quantifying the minerals that make up the bone, for different techniques that are destructive are used. Variable Pressure Scanning Electron Microscopy (VP SEM) coupled to an Energy Dispersive X-ray spectroscopy detector (EDX), allows us to analyze the microstructure and at the same time determine chemical elements, percentages, and distribution present at specific points in a sample. Five control and five jaw deformity trout, from freshwater and in the smolt stage were used. The structure and mineralization of the bone were analyzed, an average six quantification points were chosen per region of interest (ROI) and then they were analyzed by Scanning Electron Microscopy (VP SEM-EDX). The data obtained have shown the average mass percentage of calcium in trout joint bone was 8.07 % and 14.48 % in jaw deformity and control trout, respectively; and the average mass percentage of phosphorus is 4.07 % and 7.60 %, in jaw deformity and control trout, respectively. Other elements present in the sample were also identified, such as magnesium, sodium, carbon, oxygen, nitrogen, sulphur, fluorine, zinc, aluminium, and iron, with special interest the increase of carbon in the analyzed samples with mandibular deformity and the presence of aluminum in all samples. The VP SEM-EDX Technique allows direct evaluation, without destruction of the sample and with minimal sample preparation. In bone, the most frequent application of SEM-EDX is the measurement of the content of calcium (Ca) and phosphorus (P) and the relationship that exists between these elements, calcium/phosphorus (Ca/P), in the sample. At the same time, the technique allows us to detect other microelements from water or food that can eventually cause alterations in fish, confirming the hypothesis that elemental microanalysis is useful for salmon farming.

Animals , Tooth/chemistry , Oncorhynchus mykiss , Mandible/chemistry , Minerals/analysis , Spectrometry, X-Ray Emission , Tooth/ultrastructure , Microscopy, Electron, Scanning , Mandible/ultrastructure
Braz. J. Pharm. Sci. (Online) ; 58: e19501, 2022. graf
Article in English | LILACS | ID: biblio-1383974


Abstract This study reviews the knowledge on the use of conventional dental whitening and the use of enzymes as a new approach in bleaching. A review of the literature was based on academic articles and on patents related to the use of enzymes in dental bleaching. Tooth whitening techniques used nowadays are well reported in the literature, and its mechanism of action consists of an oxidoreduction reaction with the release of free radicals. The great instability of radicals, when in contact with the tissues, promotes oxidation and reduction in the size of the pigment chains incorporated into them. These pigments are eventually broken down into smaller and smaller molecular chains and end up being diffused from the dental structure. In turn, the use of enzymes aimed at tooth whitening can be a less harmful alternative to the tooth because their specificity regarding the substrate makes them of great interest to perform specific reactions, reducing collateral effects. The use of proteolytic enzymes and oxidoreductases paired with the application of peroxides, can be a promising alternative for obtaining even better results in the dental bleaching process.

Enzymes/analysis , Tooth Bleaching Agents/analysis , Oxidoreductases/administration & dosage , Tooth , Dentistry/classification , Literature
Rev. Ateneo Argent. Odontol ; 66(1): 48-51, 2022.
Article in Spanish | LILACS | ID: biblio-1380370


Los dientes animales de las diferentes especies (hu- mano, equino, cerdo, etc.) están constituidos histológi- camente por cuatro tejidos fundamentales. Ellos son: esmalte, dentina, cemento y pulpa dental. Su compo- sición, estructura, morfología y tamaño son disímiles para cada género. Según numerosas investigaciones, los dientes de bovino serían los de elección por ser de fácil obtención y por tener muy pocas, o ninguna, diferencias tanto a nivel macro como microscópico con respecto a los dientes humanos. El objetivo de la presente revisión es aportar información actualizada acerca de las características histológicas de los tejidos dentarios bovinos y profundizar el conocimiento de las similitudes y diferencias de los dientes bovinos y humanos dando soporte a otros estudios compa- rativos y promoviendo la utilización de las piezas dentarias bovinas en trabajos de investigación en odontología (AU)

The animal teeth of the different species (human, equine, pig, etc.) are histologically constituted by four fundamental tissues: enamel, dentin, cement and dental pulp. Their composition, structure, morphology and size are dissimilar for each gender. According to numerous investigations, bovine teeth would be the ones of choice because they are easy to obtain and have very few or no differences, both at the macro and microscopic levels, with respect to human teeth. The objective of this review is to provide updated information about the histological characteristics of bovine dental tissues and deepen the knowledge of the similarities and differences between bovine and human teeth, supporting other comparative studies and promoting the use of bovine dental pieces in research work in dentistry (AU)

Humans , Animals , Cattle , Tooth/anatomy & histology , Cattle , Dental Research , Dental Cementum/anatomy & histology , Dental Enamel/anatomy & histology , Dental Pulp/anatomy & histology , Dentin/anatomy & histology
Article in Chinese | WPRIM | ID: wpr-936134


OBJECTIVE@#To automatically construct lips symmetry reference plane (SRP) based on posed smile, and to evaluate its advantages over conventional digital aesthetic design.@*METHODS@#Eighteen subjects' three-dimensional facial and dentition data were gathered in this study. The lips SRP of experimental groups were used with the standard weighted Procrustes analysis (WPA) algorithm and iterative closest point (ICP), respectively. A reference plane defined by experts based on regional ICP algorithm, served as the truth plane. The angle error values between the lips SRP of WPA algorithm in the experimental groups and the truth plane were evaluated in this study, and the lips SRP of ICP algorithm of the experimental groups was calculated in the same way. The lips SRP based on posed smile as a reference for aesthetic design and evaluate preliminary clinical application.@*RESULTS@#The average angle error between the lips SRP of WPA algorithm and the truth plane was 1.78°±1.24°, which was smaller than that between the lips SRP of ICP and the truth plane 7.41°±4.31°. There were significant differences in the angle errors among the groups (P < 0.05). In the aesthetic design of anterior teeth, automatically constructing the lips SRP of WPA algorithm based on posed smile and the original symmetry plane by re-ference compared with the prosthetic design, the subjects' scores on the lips SRP of WPA algorithm based on posed smile (8.48±0.57) were higher than those on the original symmetry plane (5.20±1.31).@*CONCLUSION@#Automatically constructing the lips SRP of WPA algorithm based on posed smile was more accurate than ICP algorithm, which was consistent with the truth plane. Moreover, it can provide an important reference for oral aesthetic diagnosis and aesthetic analysis of the restoration effect. In the aesthetic design of anterior teeth, automatically constructing the lips SRP of WPA algorithm based on posed smile can improve the patients' satisfaction in esthetic rehabilitation.

Esthetics, Dental , Humans , Lip , Smiling , Tooth , Workflow
Chinese Journal of Stomatology ; (12): 495-502, 2022.
Article in Chinese | WPRIM | ID: wpr-935892


Objective: To screen and analyze the factors affecting the prognosis of replacing single missing tooth by autograft tooth, so as to provide reference for clinical judgment of surgical prognosis. Methods: A total of 176 patients (188 teeth) underwent autotransplantation of teeth in the Department of Oral & Maxillofacial Surgery, School of Stomatology, The Fourth Military Medical University from January 2017 to December 2019, including 85 teeth of males and 103 teeth of females were involved. The age was (33.0±9.8) years (16-65 years). The possible factors affecting the prognosis of replacing single missing tooth by autograft tooth were summarized and grouped, and the clinical and imaging data were recorded and judged. The surgical records and photographic data from the patients' previous medical records were retrospectively analyzed. The survival analysis method was used for statistical analysis to screen out the factors affecting the cumulative survival rate of transplanted teeth. Results: The 5-year cumulative survival rate of 188 transplanted teeth was 88.4%. Univariate Log-Rank analysis showed that age (P<0.001), sex (P=0.008), smoking (P<0.001), position of recipient area (P<0.001), height of alveolar bone in recipient area (P<0.001), time of donor tooth in vitro (P<0.001), use of donor model (P<0.001) and initial stability (P<0.001) were significantly correlated with cumulative survival rate of transplanted teeth. Multivariate Cox proportional hazard regression analysis showed that smoking (β=-2.812, P=0.049), alveolar bone height (β=1.521, P=0.020), donor time (β=-2.001, P=0.019), use of donor model (β=1.666, P=0.034) and initial stability (β=-1.417, P=0.033) were significantly correlated with the cumulative survival rate of transplanted teeth. Conclusions: The prognosis of autogenous tooth transplantation can be predicted by smoking, height of alveolar bone in recipient area, time of donor teeth in vitro, use of donor model and initial stability. Good prognosis of transplanted teeth can be obtained by using donor model during operation, reducing the time of donor teeth in vitro, taking effective methods to restore alveolar bone height, maintaining good initial stability, and good oral health education after operation.

Adult , Female , Humans , Male , Prognosis , Retrospective Studies , Tooth/transplantation , Tooth Loss , Transplantation, Autologous , Treatment Outcome , Young Adult
Rev. Asoc. Odontol. Argent ; 109(3): 158-163, dic. 2021. tab
Article in Spanish | LILACS | ID: biblio-1370768


Objetivo: El objetivo del presente estudio fue analizar el grado de concordancia entre alumnos y docentes de dife- rentes unidades académicas en la evaluación radiográfica de tratamientos endodónticos realizados en dientes humanos "ex vivo". Materiales y métodos: Un docente y un alumno de grado pertenecientes a siete unidades académicas, dos cáte- dras de Endodoncia de Argentina y una de México, Ecuador, España, Chile y Portugal evaluaron radiográficamente 357 tratamientos endodónticos realizados "ex vivo" por estu- diantes de grado. De acuerdo con su criterio individual, de- terminaron si cada uno de esos tratamientos podía ser con- siderado como correcto o incorrecto. El coeficiente Kappa fue utilizado para el análisis estadístico. Resultados: El valor de Kappa fue entre 0,04 y 0,30 considerado como indicador de escasa concordancia y varió según la unidad académica en la que se habían registrado los datos. Conclusión: El nivel de concordancia en la categoriza- ción del resultado de la evaluación radiográfica de tratamien- tos endodónticos varía entre alumnos de grado y docentes de las distintas unidades académicas (AU)

Aim: To analyse the degree of agreement between stu- dents and teachers at different academic units regarding the radiographic evaluation of endodontic treatments performed on human teeth "ex vivo". Materials and methods: One teacher and one student from seven Academic units, two Departments of Endodontics in Argentina and one each in Mexico, Ecuador, Spain, Chile and Portugal conducted a radiographic evaluation of 357 endodontic treatments performed by undergraduate students. According to their individual criteria, they determined wheth- er the treatments were adequate or inadequate. Kappa coeffi- cient was used for statistical analysis. Results: The Kappa value was between 0.04 and 0.30, considered as an indicator of poor agreement, and varied ac- cording to the academic institution where the data had been recorded. Conclusion: The level of agreement in classifying the re- sults of the radiographic evaluation of endodontic treatments varies between undergraduate students and teachers at the different academic units (AU)

Humans , Root Canal Therapy/statistics & numerical data , Students, Dental , Tooth/diagnostic imaging , Education, Dental , Educational Measurement , Faculty, Dental , Argentina , Portugal , Schools, Dental , Spain , Chile , Ecuador , Mexico