ABSTRACT
O objetivo deste estudo clínico controlado, aleatorizado e com duplo-maascaramento, foi comparar o desempenho clínico de uma resina à base de silorano com uma resina à base de metacrilato, em restuarações Classe II, compostas e complexas, ao longo de 18 meses. Após obtenção do consentimento livre e esclarecido, 33 participantes receberam 100 restuarações (n=50), alocadas aleatoriamente em grupo teste (Resina Filtek P90® e Sistema Adesivo Silorano - 3M ESPE) ou grupo controle (Resina Filtek P60® e Adesivo Adper SE Plus® - 3M ESPE). Após uma semana, as restuarações receberam acabamento e polimento. Um único operador realizou todos os procedimentos restuaradores. Dois examinadores calibrados (kappa ponderado ≥0,7) avaliaram as restaurações no baseline e após 18 meses, de acordo com os critérios United States Public Health Service (USPHS) modificados...
Subject(s)
Humans , Male , Female , Composite Resins/analysis , Dental Restoration, Permanent , Comparative Effectiveness ResearchABSTRACT
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.
Subject(s)
Acetone/chemistry , Composite Resins/chemistry , Copper/chemistry , Dental Amalgam/chemistry , Dental Bonding/methods , Dental Cavity Preparation/classification , Dental Cements/chemistry , Dental Etching/methods , Dental Leakage/classification , Dental Materials/chemistry , Dental Restoration Repair , Humans , Materials Testing , Polymethacrylic Acids/chemistry , Silicon Dioxide/chemistry , Silver/chemistry , Silver Staining , Temperature , Time FactorsABSTRACT
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.
Objetivo: Avaliar a microinfiltração em restaurações de amálgama com reparo em amálgama ou amálgama adesivo. Métodos: Trinta pré-molares humanos extraídos foram restaurados com amálgama. Simulou-se um defeito nas restaurações reparado com: G1 - amálgama (n=15) (Permite C-SDI); G2 - amálgama adesivo (n=15) (Caulk 34% Condicionador dentário Gel - Dentsply + Prime & Bond 2.1 - Dentsply + Permite C-SDI). Os dentes foram imersos em solução de nitrato de prata a 50%, termociclados e então, secionados longitudinalmente através da restauração e examinados por três examinadores usando um estereomicroscópio. A microinfiltração foi avaliada pela penetração de corante com uma escala de 0 a 4. Diferenças entre os grupos foram verificadas pelos testes Kruskal Wallis e Dunn. Resultados: Na interface reparo/dente, a técnica de reparo com amálgama adesivo foi significativamente mais efetiva, apresentando menor microinfiltração (escore 0=53.3%, P= 0,0012). Já na interface reparo/restauração, houve menor microinfiltração nas restaurações reparadas com amálgama convencional (escore 0=86.7%, P<0,001). Conclusão: Nenhum dos materiais eliminou a microinfiltração completamente. O uso de sistemas adesivos tem efeito significativo no selamento da interface reparo/dente, entretanto para interface reparo/restauração, ele pode aumentar a microinfiltração.
Subject(s)
Humans , Dental Amalgam , Dental Restoration Failure , In Vitro Techniques , Dental Leakage/therapy , Dental Restoration, PermanentABSTRACT
O presente trabalho teve como objetivo ofertar estágio profissionalizante para a educação profissional na área de prótese fixa, bem como suprir carências relacionadas à confecção técnica e laboratorial de elementos protéticos, para o desenvolvimento e suporte de clínicas de extensão e projetos de pesquisa da Faculdade de Odontologia da Universidade Federal de Uberlândia (FOUFU), por meio da elaboração de trabalhos protéticos na área de prótese fixa nas dependências do Curso Técnico em Prótese Dentária da Escola Técnica de Saúde (CTPD/ESTES). Os trabalhos foram realizados em forma de estágio supervisionado, pelos estudantes da ESTES, que além de se capacitarem por meio de treinamento teórico/ prático, na confecção de diversos tipos de próteses, interagiram com trabalhos de pesquisa e ofertaram à comunidade carente a oportunidade de usufruírem de aparelhos de qualidade e sem custos (AU).
The present work aimed to offer professional training for professional education in the area of fixed prosthesis, and to address the technical and laboratorial deficiencies in making prosthetic elements, for the development and support of extension clinics and research projects of the Dental School of the Federal University of Uberlândia (FOUFU), by performing prosthetic work in the area of fixed prosthesis at the Technical Dental Prostheses Course facilities of the Technical School of Health (CTPD/ESTES). The work was performed as supervised training for the students of ESTES, who not only were qualified to make several types of prostheses through theoretical / practical training, but also based themselves on research work. They then offered the poor community the opportunity to use these quality devices at no cost (AU).