Your browser doesn't support javascript.
loading
Show: 20 | 50 | 100
Results 1 - 9 de 9
Filter
1.
Dental press j. orthod. (Impr.) ; 28(2): e2321167, 2023. tab, graf
Article in English | LILACS-Express | LILACS, BBO | ID: biblio-1439985

ABSTRACT

ABSTRACT Objective: To evaluate the pulp chamber temperature rise (PCTR) in light-cure bonding of brackets with and without primer, in intact and restored mandibular central incisors (M1), maxillary first premolars (Mx4), and mandibular third molars (M8). Material and Methods: Ninety human teeth were included: M1 (n=30), Mx4 (n=30), and M8 (n=30). Light-cure bonding of brackets was performed in intact (n=60) and restored (n=30) teeth, with primer (n=60) or without (n=30) primer. PCTR was defined as the difference between initial (T0) and peak temperatures (T1), recorded with a thermocouple during light-cure bonding. Differences on PCTR between bonding techniques (primer vs. no primer), teeth types (M1 vs. Mx4 vs. M8), and teeth condition (intact vs. restored) were estimated by ANCOVA, with α=5%. Results: PCTR was significantly higher with the use of primer (2.05 ± 0.08oC) than without primer (1.65 ± 0.14oC) (p=0.02), and in M1 (2.23 ± 0.22oC) compared to Mx4 (1.56 ± 0.14oC) (p<0.01). There was no difference in the PCTR in M8 (1.77 ± 0.28oC) compared to M1 or Mx4 (p>0.05), and no difference between intact (1.78 ± 0.14oC) and restored (1.92 ± 0.08oC) teeth (p=0.38). There was no influence of dentin enamel thickness in the PCTR (p=0.19). Conclusion: PCTR was higher in light-cure bonding of brackets with primer, especially in M1. Light-cure bonding seems less invasive without primer.


RESUMO Objetivo: Comparar o aumento na temperatura da câmara pulpar (ATCP) na colagem de braquetes com fotoativação usando ou não primer, em dentes hígidos versus dentes restaurados, em incisivos centrais inferiores (ICI), primeiros pré-molares superiores (1PMS) e terceiros molares inferiores (3MI). Métodos: Foram incluídos noventa dentes humanos: ICI (n=30), 1PMS (n=30) e 3MI (n=30). A colagem de braquetes com fotoativação foi realizada em dentes hígidos (n=60) ou dentes restaurados (n=30), com primer (n=60) ou sem (n=30) primer. O ATCP foi definido como a diferença entre as temperaturas inicial (T0) e máxima (T1) registradas com um termômetro durante a colagem com fotoativação. As diferenças no ATCP entre as técnicas de colagem (com primer vs. sem primer), diferentes dentes (ICIvs.1PMSvs.3MI) e condição dos dentes (hígidos vs. restaurados) foram estimadas por ANCOVA, com α=5%. Resultados: O ATCP foi significativamente maior com o uso de primer (2,05 ± 0,08oC) do que sem primer (1,65 ± 0,14oC) (p=0,02), e no ICI (2,23 ± 0,22oC) do que no 1PMS (1,56 ± 0,14oC) (p<0,01). Não houve diferença no ATCP do 3MI (1,77 ± 0,28oC) em comparação com ICI ou 1PMS (p>0,05), e não houve diferença entre dentes hígidos (1,78 ± 0,14oC) e restaurados (1,92 ± 0,08oC) (p=0,38). Não houve influência da espessura da dentina e do esmalte no ATCP (p=0,19). Conclusão: O ATCP foi maior na colagem de braquetes com fotoativação usando primer, principalmente no ICI. A colagem com fotoativação parece ser menos invasiva sem primer.

2.
RFO UPF ; 24(3): 334-339, 2019. ilus, tab
Article in English | LILACS, BBO | ID: biblio-1357639

ABSTRACT

Objective: To assess the apical transportation in simulated root canals with different curvature angles prepared using manual instrumentation and rotary and reciprocating motions. Methods: Sixty simulated root canals were prepared using manual instrumentation (Flexofile K-file) (MT), continuous rotation (HyFlex CM) (HF), and reciprocating motion (WaveOne Gold) (WG). A trained operator prepared the canals, and the apical enlargement was standardized up to a #25 file in all systems tested. Two different curvature angles of the simulated root canals were tested: 70° and 50°. Overlapping photographs of the simulated root canals, before and after root canal preparation, were used to measure the apical transportation (mm), using the ImageJ software. Descriptive statistics (mean and standard deviation) were analyzed and the groups were compared with two-way ANOVA followed by Tukey's post-hoc, with α=5%. Results: There was a statistically significant interaction between the effects of group and angle in the apical transportation (F = 3.740; p = 0.031). Simple main effects analysis showed that HyFlex CM produced a significantly lower apical transportation when compared to WaveOne Gold (p = 0.02) and the manual technique (p < 0.01), regardless of the angle. However, there were no differences between WaveOne Gold and manual technique in canals with the 70° angle (p>0.05). The group with the highest mean apical transportation was the MT, with 0.0917 mm, followed by WG and HF, with 0.0633 and 0.0325, respectively. Conclusion: Simulated root canals prepared with rotary motion (HyFlex CM) showed the lowest apical transportation, followed by the reciprocating motion (WaveOne Gold). The manual technique showed the most unfavorable results, with the highest apical transportation.(AU)


Objetivo: avaliar o transporte apical em canais radiculares simulados com diferentes ângulos de curvatura preparados por meio de instrumentação manual e dos movimentos rotativo e reciprocante. Métodos: sessenta canais simulados foram preparados usando instrumentação manual (Flexofile K- -file) (MT), rotação contínua (HyFlex CM) (HF) e movimento reciprocante (WaveOne Gold) (WG). O preparo do canal radicular foi realizado por um operador treinado, e o alargamento apical foi padronizado até o instrumento #25 em todos os sistemas testados. Dois diferentes ângulos de curvatura dos canais simulados foram testados: 70° e 50°. Fotografias sobrepostas dos canais simulados, antes e após o preparo do canal radicular, foram utilizadas para medir o transporte apical (mm), utilizando o software ImageJ. Estatísticas descritivas (média e desvio padrão) foram analisadas e as comparações entre os grupos foram realizadas através de ANOVA de duas vias, seguido por post-hoc de Tukey, com α=5%. Resultados: houve interação estatisticamente significativa entre os efeitos do grupo e do ângulo no transporte apical (F = 3,740; p = 0,031). A análise simples dos efeitos principais mostrou que o sistema Hy- Flex CM produziu um transporte apical significativamente menor quando comparado ao sistema WaveOne Gold (p = 0,02) e à Técnica Manual (p <0,01), independentemente do ângulo. No entanto, não houve diferenças entre o WaveOne Gold e a Técnica Manual em canais com ângulo de 70 ° (p> 0,05). O grupo que apresentou maior transporte apical médio foi o MT, com 0,0917 mm, seguido pelo WG e pela HF, com 0,0633 e 0,0325, respectivamente. Conclusão: canais radiculares simulados preparados com movimento rotatório (HyFlex CM) mostraram o menor transporte apical, seguido de movimento reciprocante (WaveOne Gold). A técnica manual revelou os resultados mais desfavoráveis, com maior transporte apical.(AU)


Subject(s)
Root Canal Preparation/instrumentation , Tooth Apex/anatomy & histology , Dental Instruments , Random Allocation , Reproducibility of Results , Analysis of Variance , Equipment Design
3.
Braz. oral res. (Online) ; 33: e007, 2019. tab
Article in English | LILACS | ID: biblio-989471

ABSTRACT

Abstract The aim of this study was to assess self-reported history of root canal treatment (SRHRCT) as a method for detecting the presence of root canal treatment (RCT) and apical periodontitis (AP) in a southern Brazilian subpopulation. In this cross-sectional study, 136 military police officers from the city of Porto Alegre, Brazil, were included. The participants were interviewed and full-mouth periapical radiographs were taken. A calibrated examiner determined the presence of RCT and AP by applying standardized criteria. The diagnostic accuracy of SRHRCT was calculated separately for RCT and AP. Accuracy, sensitivity, specificity, positive and negative predictive values (+PV and -PV), efficiency, and positive and negative likelihood ratios (+LR and -LR) were estimated. The mean age of the participants was 34.1 ± 10.4 years and 88.2% were males. Overall, SRHRCT demonstrated high sensitivity and specificity for RCT, but not for AP: sensitivity (RCT = 0.960, AP = 0.757) and specificity (RCT = 0.835, AP = 0.631). The estimated values for PV and LR were: +PV (RCT=0.777, AP=0.396), -PV (RCT = 0.972, AP = 0.890), +LR (RCT = 5.853, AP = 2.057), and -LR (RCT = 0.046, AP = 0.383). SRHRCT proved to be a good predictor of the presence of RCT, but a weak predictor of AP in this subpopulation.


Subject(s)
Humans , Male , Female , Adult , Periapical Periodontitis/epidemiology , Root Canal Therapy/statistics & numerical data , Self Report/standards , Periapical Periodontitis/diagnostic imaging , Reference Values , Brazil/epidemiology , Radiography, Dental , Prevalence , Cross-Sectional Studies , Reproducibility of Results , Sensitivity and Specificity , False Negative Reactions , False Positive Reactions , Middle Aged
4.
Rev. bras. neurol ; 54(3): 28-34, jul.-ago. 2018. tab
Article in Portuguese | LILACS | ID: biblio-948094

ABSTRACT

A associação entre saúde bucal e desfechos de saúde geral vem sendo estudada de modo crescente nas últimas décadas, com ênfase na relação entre doenças inflamatórias crônicas bucais e doenças cardiovasculares (DCV) de origem aterosclerótica. OBJETIVO: revisar a literatura, atualizando os conhecimentos sobre a associação entre parâmetros de saúde bucal (doença periodontal (DP), periodontite apical (PA) e perda dentária) e a ocorrência de acidente vascular encefálico isquêmico (AVEI). METODOLOGIA: foram pesquisadas as seguintes bases eletrônicas, sem restrições de idiomas ou data: PubMed/ MEDLINE, LILACS, Scielo e ISI Web of Science e Schoolar Google, além de buscas manuais. Estudos realizados em animais ou in vitro, relatos e séries de casos foram excluídos. RESULTADOS: a presente revisão identificou e incluiu 11 estudos clínicos observacionais avaliando a associação entre diferentes indicadores de saúde bucal e AVEI, além de uma meta-analise sobre o assunto. Nenhum estudo de intervenção foi identificado. CONCLUSÃO: a evidência disponível, oriunda de estudos observacionias, sugere que as principais doenças inflamatórias crônicas bucais (DP e PA) estão associadas de modo independente com DCV de origem aterosclerótica. A relação entre DP e AVEI parece consistente, porém há carência de estudos analisando a associação entre AVEI e outros parâmetros de saúde bucal, especialmente cárie e PA. Até o momento, uma relação de causalidade entre DP, PA e AVEI não pode ser confirmada ou rejeitada, em face à ausência de estudos de intervenção. Futuros estudos deverão contribuir para o esclarecimento dos mecanismos biológicos que embasam a associação entre as doenças crônicas bucais e o AVEI.


The association between oral health and general health has been under study for decades, with emphasis on the relationship between chronic oral inflammatory diseases and atherosclerotic cardiovascular diseases (ACVD). OBJECTIVE: to review the literature, updating the knowledge about the association between oral health (periodontal disease (PD), apical periodontitis (AP) and tooth loss) and the occurrence of ischemic stroke (IS). METHODOLOGY: the following electronic databases were searched, without language or date restrictions: PubMed/MEDLINE, LILACS, Scielo, ISI Web of Science and Schoolar Google, as well as manual searches. Studies in animals or in vitro, reports and series of cases were excluded. RESULTS: the present review identified and included 11 clinical observational studies evaluating the association between different indicators of oral health and IS, and one meta-analysis on the field. No interventional studies were identified. CONCLUSION: the available evidence from observational studies suggests that the main chronic oral inflammatory diseases (PD and PA) are independently associated with ACVD. In addition, the relationship between PD and IS seems consistent, but there is a lack of studies analyzing the association between IS and other oral health parameters, such as caries and AP. To now, a causal relationship between DP, PA and IS cannot be confirmed or rejected, considering the lack of interventional studies on the area. Future studies should contribute to the comprehension of the biological mechanisms underlying the association between the main chronic oral diseases and IS.


Subject(s)
Humans , Male , Periodontal Diseases/complications , Periodontal Diseases/epidemiology , Cardiovascular Diseases/epidemiology , Stroke/epidemiology , Periapical Periodontitis/complications , Review Literature as Topic , Epidemiologic Studies , Incidence , Risk Factors , Dental Caries , Atherosclerosis
5.
Braz. oral res ; 26(5): 436-442, Sept.-Oct. 2012. tab
Article in English | LILACS | ID: lil-649368

ABSTRACT

Previous studies have suggested that oral diseases may influence the development of atherosclerosis. The aim of this study was to test the hypothesis that poor self-reported oral health (SROH) and tooth loss are positively associated with coronary atherosclerotic burden (CAB). 382 consecutive subjects undergoing coronary angiography were included. Socio-demographic characteristics, cardiovascular risk factors and oral health status were collected using a standardized questionnaire, including data on SROH and use of dental prosthesis. Number of teeth and anthropometric measures were collected through clinical examinations. CAB at coronary angiography was quantified using the Friesinger score (FS). Prevalence ratios (PR) were calculated with Poisson regression analyses. Mean age was 60.3 ± 10.8 years, with 63.2% males. In the bivariate analysis, there was a significant association (p < 0.05) between CAB and age (> 60y) (PR = 1.01, 95%CI = 1.02-1.16), male gender (PR = 1.11, 95%CI = 1.03-1.19), smoking (PR = 1.08, 95%CI = 1.01- 1.16), hypertension (PR = 1.12, 95%CI = 1.03-1.22), diabetes (PR = 1.17, 95%CI = 1.05-1.21), poor SROH (PR = 1.22, 95%CI = 1.02-1.46) and tooth loss (< 20teeth present) (PR = 1.10, 95%CI = 1.02-1.19). The use of dental prosthesis was not associated with CAB. The multivariate models, adjusted for age, gender, smoking, hypertension, diabetes and dyslipidemia showed that poor SROH (p = 0.03) and tooth loss (p = 0.02) were independently associated with CAB, confirming the study hypothesis.


Subject(s)
Adult , Aged , Aged, 80 and over , Female , Humans , Male , Middle Aged , Young Adult , Coronary Artery Disease/complications , Dental Health Surveys/methods , Oral Health , Self Report , Tooth Loss/complications , Age Distribution , Age Factors , Brazil , Cross-Sectional Studies , Coronary Artery Disease/epidemiology , Diagnostic Self Evaluation , Epidemiologic Methods , Health Status , Sex Distribution , Tooth Loss/epidemiology
6.
Rev. Fac. Odontol. Porto Alegre ; 51(1): 5-10, jan.-abr. 2010. ilus, tab, graf
Article in Portuguese | LILACS, RHS | ID: lil-719563

ABSTRACT

O objetivo deste estudo foi analisar o impacto do estágio supervisionado (ES) de alunos da FO-UFRGS, com enfoque nos resultados, no desempenho da Policlínica Odontológica Central (POC) da Brigada Militar (BM) no período de abril de 2008 a dezembro de 2009. Para tanto, foi realizado um levantamento mensal do número de pacientes atendidos (PA) e do número de procedimentos odontológicos (PO) realizados por estagiários (E) e por cirurgiões-dentistas (CD) do serviço no período estudado. A partir da comparação de PA e PO realizados por E e CD, foram criados indicadores de produtividade do ES (IPE) em relação a PA (IPE-pa) e PO (IPE-po), bem como um indicador de produtividade geral do ES (IPE-g). Os resultados demonstraram médias de IPE-pa = 1,63 (±0,74), IPE-po = 1,48 (±0,49) e IPE-g = 1,55 (±0,57), indicando que o ES proporcionou acréscimo de produtividade geral equivalente a mais de um e meio (1,5) CD por mês para o serviço da POC, revelando aumento médio mensal de 10,46% na produtividade geral do serviço.


The aim of this study was to analyze the impact of supervised internship (ES) of students from FO-UFRGS, focusing on results, on the performance of the Dental Central Polyclinic (POC) of Brigada Militar (BM) in the period between April-2008 and December-2009. To do so, a monthly survey of the number of treated patients (PA) and the number of dental procedures (PO) performed by trainees (E) and dentists (CD) of the service during the period was conducted. From the comparison of PA and PO performed by E and CD, productivity indicators of the ES (IPE) for PA (IPE-pa) and PO (IPE-po) were proposed and calculated, as well as an indicator of overall productivity of the ES (IPE-g). The results showed average values of IPE-pa = 1.63 (± 0.74), IPE-po = 1.48 (± 0.49) and IPE-g = 1.55 (± 0.57), indicating that the ES provided a general increase in productivity equivalent to more than one and a half (1.5) CD per month for the service of POC, showing average monthly increase of 10.46% in the overall productivity of the service.


Subject(s)
Employee Performance Appraisal , Health Human Resource Evaluation , Education, Dental , Efficiency, Organizational , Training Support , Dental Health Services
7.
J. appl. oral sci ; 15(5): 429-436, Sept.-Oct. 2007. ilus, tab
Article in English | LILACS | ID: lil-465926

ABSTRACT

Coronal leakage is an important factor affecting the outcome of endodontic therapy. This study evaluated the microbial leakage (ML) and the apical inflammatory response (AIR) in dog's teeth after root canal filling with three endodontic sealers, post preparation and exposure to the oral environment, testing the hypothesis that there is a positive correlation between these two histological parameters (ML and AIR). Sixty-four root canals of 8 mongrel dogs were cleaned, shaped and randomly distributed into groups according to the sealer to be used: Sealer 26 (n=18); AH Plus (n=18); RoekoSeal (n=19); no sealer - control group (n=9). Root canals were filled by the lateral condensation technique. Post space preparation left 4 mm of filling material in the apical root third, and specimens were exposed to the oral environment for 90 days. The dogs were killed and jaw blocks were histologically processed using Brown & Brenn and HE staining techniques. ML and AIR were scored from 1 to 4. Results were analyzed statistically using ANOVA, Duncan's post-hoc test and Spearman's correlation. ML and AIR score means were: Sealer 26 - 2.44±0.98 and 2.50±0.70; AH Plus - 2.50±0.78 and 2.22±0.54; RoekoSeal - 1.84±0.95 and 2.63±0.83; Control - 2.56±1.23 and 3.11±0.60. Statistically significant differences in AIR scores were found between the AH Plus and control groups (p<0.05). Although RoekoSeal had the lowest ML means, and AH Plus, the lowest AIR means after 90-day exposure to the oral environment, no statistically significant differences were found between the three sealers under study, and no correlation was found between ML and AIR.

8.
RPG rev. pos-grad ; 7(3): 219-224, jul.-set. 2000. tab, graf
Article in Portuguese | LILACS, BBO | ID: lil-308307

ABSTRACT

O presente estudo buscou relacionar a presença clínica de fístula com o aspecto microscópico de lesöes periapicais. Para tanto, foram examinados 72 lesöes apicais relacionadas com dentes com indicaçäo para exodontia por apresentarem grande destruiçäo coronária por cárie e necrose pulpar, sem possibilidade de reconstruçäo protética, com ou sem fístula associada. Radiograficamente, a lesäo apical traduzia-se pela presença de área radiolúcida localizada junto à porçäo apical do dente, independentemente de tamanho, forma, contorno ou área de esclerose óssea. Após a exodontia, as lesöes foram curetadas e processadas por métodos rotineiros de fixaçäo, inclusäo em parafina e coloraçäo por H. E. O exame histopatológico analisou a presença de supuraçäo, tecido de granulaçäo e epitélio odontogênico hiperplásico revestindo cavidade. Os resultados mostraram que 38,9 por cento eram abscessos crônicos, 29,2 por cento cistos abscedados, 19,4 por cento cistos inflamatórios e 12,5 por cento granulomas apicais. Clinicamente, 12,5 por cento das lesöes apresentavam fístula e, destas, 66,67 por cento eram cistos abscedados e 33,33 por cento eram abscesos crônicos. Os resultados, submetidos à análise estatística pelo teste qui-quadrado, mostraram uma relaçäo de dependência entre o diagnóstico da lesäo e a presença clínica de fístula: o diagnóstico de cisto abscedado tende a apresentar uma maior freqüência de fístula (p= 0,04). Dentre as lesöes clinicamente näo fistuladas (87,5 por cento), 63,49 por cento apresentam supuraçäo ao exame microscópico


Subject(s)
Humans , Periapical Diseases/diagnosis , Fistula , Microscopy , Suppuration
9.
Rev. Fac. Odontol. Porto Alegre ; 38(2): 11-8, dez. 1997. ilus, tab, graf
Article in Portuguese | LILACS, BBO | ID: lil-230170

ABSTRACT

Este estudo avaliou, "in vitro", a radiopacidade dos cimentos endodônticos Sealapex e Sealer-26 quando a estes foram acrescentadas diferentes proporçöes de iodofórmio, tendo como controle o cimento Fillcanal. Os resultados foram obtidos através do sistema Accu-Ray de imagem digitalizada e de testes colorimétricos. Para ambos os cimentos testados, a proporçäo de 1/2 de iodofórmio para uma de cimento foi a que, com a menor quantidade de iodofórmio adicionado, igualou-se estatisticamente ao cimento controle Fillcanal


Subject(s)
Dental Cements , In Vitro Techniques , Root Canal Obturation
SELECTION OF CITATIONS
SEARCH DETAIL