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Avaliação da microinfiltração em restaurações classe II com várias técnicas de colocação de compósitos: estudo in vitro
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| Projeto de pós-graduação_41352 | 1.67 MB | Adobe PDF |
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Objetivo: O presente estudo teve como objetivo avaliar a infiltração marginal em restaurações classe II com resina composta nano-híbrida 3M™ Filtek™ Supreme XTE Universal Restorative, comparando três técnicas distintas de inserção do compósito: incremental horizontal, incremental oblíqua e técnica em bloco. A finalidade foi identificar qual abordagem proporciona menor infiltração marginal.
Materiais e métodos: Foi realizado um estudo in vitro com 45 dentes posteriores humanos extraídos. Foram preparadas duas cavidades classe II (mesial e distal) em cada dente e restauradas com resina 3M™ Filtek™ Supreme XTE Universal Restorative. Foram realizadas 90 restaurações, divididas aleatoriamente por ter 3 grupos (n=30): Grupo I (Técnica em Bloco); Grupo II (Técnica Incremental Horizontal); Grupo III (Técnica Incremental Oblíqua) As amostras foram submetidas a termociclagem e posteriormente imersas em solução azul de metileno 2%, cortadas e observadas com lupa para análise da microinfiltração marginal. A infiltração foi medida nas paredes gengival e axial, sendo atribuídas pontuações em SCORE e analisadas estatisticamente com o programa IBM Corp. Released 2023. IBM SPSS, Version 30.0.0.0.
Resultados: No estudo 1 a técnica incremental oblíqua e bloco apresentaram menor infiltração gengival (mediana=0,0), enquanto a técnica horizontal exibiu maior infiltração (mediana=1,5). A infiltração axial foi mínima em todos os grupos experimentais (mediana=0,0). A análise estatística pelo teste de Kruskal-Wallis não revelou diferenças significativas entre as técnicas restauradoras tanto para infiltração gengival quanto axial (p=0,236).
Conclusão: Os resultados revelaram que, embora a técnica incremental horizontal tenha apresentado uma mediana mais elevada de microinfiltração gengival, não foram observadas diferenças estatisticamente significativas entre as técnicas restauradoras (p>0,05). Assim, nenhuma das técnicas restauradoras testadas influenciou significativamente a microinfiltração marginal.
Objective: The present study aimed to evaluate marginal microleakage in class II restorations using the nano-hybrid composite resin 3M™ Filtek™ Supreme XTE Universal Restorative, by comparing three distinct composite placement techniques: horizontal incremental, oblique incremental, and bulk-fill technique. The goal was to determine which approach results in the least marginal microleakage. Materials and Methods: An in vitro study was conducted using 45 extracted human posterior teeth. Two class II cavities (mesial and distal) were prepared on each tooth and restored with 3M™ Filtek™ Supreme XTE Universal Restorative resin. A total of 90 restorations were performed, randomly assigned into three groups (n=30): Group I (Bulk-fill Technique), Group II (Horizontal Incremental Technique), and Group III (Oblique Incremental Technique). The samples underwent thermocycling and were subsequently immersed in a 2% methylene blue solution, then sectioned and examined under a magnifying lens to assess marginal microleakage. Infiltration was measured on the gingival and axial walls, scored accordingly, and statistically analysed using IBM Corp. Released 2023. IBM SPSS, Version 30.0.0.0. Results: In Study 1, the oblique incremental and bulk-fill techniques showed lower gingival microleakage (median = 0.0), while the horizontal technique exhibited higher infiltration (median = 1.5). Axial infiltration was minimal across all experimental groups (median = 0.0). Statistical analysis using the Kruskal Wallis test revealed no significant differences between the restorative techniques for both gingival and axial infiltration (p = 0.236). Conclusion: The results showed that although the horizontal incremental technique presented a higher median of gingival microleakage, no statistically significant differences were observed between the restorative techniques (p > 0.05). Therefore, none of the tested restorative techniques significantly influenced marginal microleakage.
Objective: The present study aimed to evaluate marginal microleakage in class II restorations using the nano-hybrid composite resin 3M™ Filtek™ Supreme XTE Universal Restorative, by comparing three distinct composite placement techniques: horizontal incremental, oblique incremental, and bulk-fill technique. The goal was to determine which approach results in the least marginal microleakage. Materials and Methods: An in vitro study was conducted using 45 extracted human posterior teeth. Two class II cavities (mesial and distal) were prepared on each tooth and restored with 3M™ Filtek™ Supreme XTE Universal Restorative resin. A total of 90 restorations were performed, randomly assigned into three groups (n=30): Group I (Bulk-fill Technique), Group II (Horizontal Incremental Technique), and Group III (Oblique Incremental Technique). The samples underwent thermocycling and were subsequently immersed in a 2% methylene blue solution, then sectioned and examined under a magnifying lens to assess marginal microleakage. Infiltration was measured on the gingival and axial walls, scored accordingly, and statistically analysed using IBM Corp. Released 2023. IBM SPSS, Version 30.0.0.0. Results: In Study 1, the oblique incremental and bulk-fill techniques showed lower gingival microleakage (median = 0.0), while the horizontal technique exhibited higher infiltration (median = 1.5). Axial infiltration was minimal across all experimental groups (median = 0.0). Statistical analysis using the Kruskal Wallis test revealed no significant differences between the restorative techniques for both gingival and axial infiltration (p = 0.236). Conclusion: The results showed that although the horizontal incremental technique presented a higher median of gingival microleakage, no statistically significant differences were observed between the restorative techniques (p > 0.05). Therefore, none of the tested restorative techniques significantly influenced marginal microleakage.
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Restaurações classe II Resina composta “Microinfiltração “Técnica em bloco Técnica incremental horizontal Técnica incremental oblíqua Class II restorations Composite resin Microleakage Bulk-fill technique Horizontal incremental technique Oblique incremental technique