Radiographic view of adhesive layer and relationship with marginal leakage in class II composite resin restorations

  • Márcia Bueno Universidade Federal de Pelotas - UFPel
  • Rafael Ratto de Moraes Universidade Estadual de Campinas -UNICAMP
  • Eduardo Costa de Azevedo Universidade Federal de Pelotas - UFPel
  • Rudimar Antônio Baldissera Universidade Federal de Pelotas - UFPel

Resumo

This study assessed the influence of the application of bonding agents prior to or after matrix and wedge placement in the radiographic view of the adhesive layer in cervical walls of Class II composite resin restorations and correlated the findings with marginal leakage. Standard cavities were prepared in the mesial
and distal faces of human molars, with cervical margins placed in dentin/cementum. Restorations were made using metallic matrix bands and wooden wedges. The microhybrid composite Filtek Z250 (3M ESPE) and two
adhesive systems – Single Bond 2 (SB-3M ESPE) and Scotchbond Multi-Purpose (SMP-3M ESPE) – were used, thus defining five groups (n= 12): [SB1] and [SMP1]- matrix and wedge placed after bonding application; [SB2] and [SMP2]-matrix and wedge placed prior to bonding application; [Control] – restorations without adhesive system. Bitewing radiographs from each tooth were obtained and the view or not of the adhesive layer in the cervical wall of each restoration was observed under magnification (40x). Specimens were thermalcycled and dye penetration (0.5% basic fuchsine) evaluated under magnification (40x). Data were submitted to Kruskal-Wallis and Spearman correlation tests (p=0.05). The placement of matrix and wedge before bonding agent application increased the view of the adhesive layer only for SB (p<0.001). Matrix did
not influence marginal leakage, and no significant relationship between radiographic view of adhesive layer and marginal leakage (r=-0.020; p =0.877) could be observed. In conclusion, SB presented better sealing ability than SMP (p<0.01).
Uniterms: Dentin-bonding agents. Dental leakage. Dental restoration permanent.

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Biografia do Autor

Márcia Bueno, Universidade Federal de Pelotas - UFPel
Professor; UFPel
Rafael Ratto de Moraes, Universidade Estadual de Campinas -UNICAMP
Graduate Student, UNICAMP
Eduardo Costa de Azevedo, Universidade Federal de Pelotas - UFPel
Graduate Student; UFPel
Rudimar Antônio Baldissera, Universidade Federal de Pelotas - UFPel
Professor; UFPel

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Publicado
2016-03-14
Como Citar
Bueno, M., Moraes, R. R. de, Azevedo, E. C. de, & Baldissera, R. A. (2016). Radiographic view of adhesive layer and relationship with marginal leakage in class II composite resin restorations. Arquivos Em Odontologia, 43(4). Recuperado de https://periodicos.ufmg.br/index.php/arquivosemodontologia/article/view/3453
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Artigos