Daniela Araújo Veloso Popoff

Repair of amalgam restorations with conventional and bonded amalgam: an in vitro study

Purpose: This study evaluated microleakage on amalgam restorations repaired by amalgam and bonded amalgam. Methods: Thirty extracted human pre-molars were restored by amalgam. A simulated defect was prepared and assigned to two treatment groups (n=15): G1 - repaired by amalgam (Permite C-SDI); G2 - repaired by bonded amalgam (Caulk 34% Tooth Conditioner Gel – Dentsply + Prime & Bond 2.1 – Dentsply + Permite C- SDI). The teeth were immersed in a 50% silver nitrate solution, thermocycled and then, sectioned longitudinally through the restoration center and examined by 3 examiners using a stereomicroscope. Microleakage was evaluated in a 0-4 scale for dye penetration. Microleakage data were analyzed by Kruskal Wallis and Dunn test. Results: The bonded amalgam technique was significantly the most effective in repair/tooth interfaces sealing (score 0=53.3%, P=0.0012). For repair/restoration interfaces, conventional amalgam was also statistically more effective in the sealing (score 0=86.7%, P<0.001). Conclusion: None of materials eliminated microleakage completely. The use of adhesive systems had significant effect on the ability to seal the repair/tooth interface, however, for repair/restoration interface, it can increase microleakage.

Repair of amalgam restorations with composite resin and bonded amalgam: a microleakage study.

BACKGROUND Total replacement is the most common technique for defective amalgam restorations, and it represents a major part of restorative dental treatment. Repair is an alternative option for amalgam restorations with localized defects. AIMS This study compared microleakage of amalgam restorations repaired by bonded amalgam or composite resin. MATERIALS AND METHODS Thirty extracted human pre-molars were prepared and restored with class I amalgam. A simulated defect was prepared that included the cavosurface margin on restorations, and the pre-molars were assigned to two treatment groups (n=15): In group 1, premolars were treated by composite resin (34% Tooth Conditioner Gel + Adper Single Bond 2 + Z100) and in group 2, premolars were repaired by bonded amalgam (34% Tooth Conditioner Gel + Prime and Bond 2.1 + Permite C). The teeth were immersed in a 50% silver nitrate solution, thermocycled, sectioned longitudinally and then observed by three examiners using a stereomicroscope. Microleakage was evaluated using a 0-4 scale for dye penetration, and data was analyzed by Kruskal Wallis and Dunn tests. RESULTS Neither of the two methods eliminated microleakage completely. Composite resin was significantly the most effective for repair/tooth interface sealing (score 0 = 80.0%; P=0.0317). For the repair/restoration interface, composite resin was also statistically more effective as a sealant (score 0=66%; P=0.0005) when compared to the bonded amalgam technique (score 0=13%; P=0.0005). CONCLUSIONS The use of adhesive systems significantly affected the ability to seal the repair/ tooth interface. However, at the level of the repair/restoration interface, the bonded amalgam technique may increase microleakage.

Ophthalmic changes in cleft lip and palate

The current study aimed to analyze through a literature review evidence of association between ocular changes and non-syndromic cleft lip and/or palate (NSCL/P). A literature review was carried out in accordance with the Cochrane Collaboration Group protocol. PubMed, Scopus, Academic Google and ISI Web of Science databases were systematically searched. A total of 16 studies were accessed, and three made up the final sample.All three studied ocular abnormalities in patients with NSCL/P.The articles found ocular abnormalities in 6.21%, 17.54% and 1.03% of patients respectively.The presence of ocular abnormalities in patients with NSCL/P was significant in this systematic review, but the articles all agreed that future studies should explore the possibility of a greater occurrence of ocular changes in individuals with NSCL/P.

Comportamentos e conhecimentos de cirurgiões-dentistas da atenção primária à saúde quanto ao câncer bucal

Introduction Considering the importance of prevention and early diagnosis of oral cancer, the Primary Health Care is an ambience suitable for the development of these actions, and dental attention plays a strategic role in this confrontation. Therefore, this study aimed to identify the knowledge and behaviors of dental surgeons of the Primary Health Care on oral cancer. Methods: This is a cross-sectional study conducted using interviews with dentists of the Family Health Strategy. The Mann-Whitney test was used for comparison between independent and dependent variables. Results: Most of the 70 dentists evaluated were identified with satisfactory knowledge (82.6%) on oral cancer; however, differences were observed with respect to the ability to provide preventive information (p<0.001); perform exfoliative cytology (p=0.011), and the level of education on oral cancer obtained at graduation (p<0.001). Most of the professionals were identified with unsatisfactory behavior (52.2%), with differences with regard to the importance given to the examination of soft tissues in the initial queries (p=0.005); the investigation of risk factors (p=0.002); providing information on self-examination of the mouth (p<0.001), and preventive activities (p=0.029). Conclusion: Most of the dentists evaluated present satisfactory knowledge on oral cancer, but this knowledge has not been put into practice in their activities.

A produção científica brasileira em Odontopediatria em um contexto internacional

As variaveis foram o numero de artigos cientificos publicados em cada revista, instituicao de origem, autoria dos artigos e o envolvimento de parcerias nacionais e internacionais. Resultados: Dos 2.428 artigos analisados, 315 eram de autores brasileiros, com uma media de 26,25 artigos por ano. Conclusoes: A participacao de pesquisadores brasileiros aumentou de 2000 para 2011. A maioria dessa producao ocorre em instituicoes publicas de ensino superior do Sudeste do pais, sendo poucos os estudos realizados em parceria com pesquisadores de diferentes instituicoes, nacionais ou internacionais. O desenvolvimento de redes de colaboracao entre pesquisadores de diferentes instituicoes deve ser encorajado como forma de aumentar a producao cientifica de alto impacto em Odontopediatria.