RESUMO
In this study, stress of traumatized incisor and the effect of stress on tooth and alveolar bone was studied with two-dimensional photoelasticity. Two homogeneous two-dimensional maxillary central incisor models were prepared. Loads were applied to the labial side of incisal edge and middle third of the crown at angles of 45 degrees and 90 degrees. It was observed that stress was increased on teeth and alveolar bone when load was applied 90 degrees on labial side of incisal edge.
Assuntos
Análise do Estresse Dentário , Incisivo/lesões , Traumatismos Dentários/fisiopatologia , Processo Alveolar/fisiopatologia , Birrefringência , Análise do Estresse Dentário/métodos , Elasticidade , Humanos , Maxila , Estresse Mecânico , Coroa do Dente/lesões , Raiz Dentária/fisiopatologiaRESUMO
The aim of this study was to evaluate, in vitro, the early tensile bond strength values of three dentin bonding agents (Scotchbond, Tenure and Gluma) to dentin. Fifteen non-carious, extracted, human third molars were used in this study. The bond strengths were calculated in an Instron test machine and expressed in MN/m2. The results were evaluated statistically using the Student-test. The in vitro tensile bond strengths of the three bonding agents to dentin showed higher values than the tensile bond strength of composite resin alone and differences among the bond strengths were significant (P < 0.05). Greater bond strength values were obtained with the Gluma bonding system than with Scotchbond or Tenure systems.