Polymerization shrinkage stresses in a premolar restored with different composite resins and different incremental techniques.

摘要: Purpose To investigate how the incremental filling technique, elastic modulus, and post-gel shrinkage of different dental composite resins affect residual stress in a restored premolar. Materials methods Sixteen composites indicated for restoring posterior teeth were tested. Elastic modulus Knoop hardness measured using indentation tests (n = 10). A strain gauge test was used to measure Two techniques, horizontal or oblique, applied finite element model premolar combination with experimentally determined properties assess conditions along interface restoration within material structures. Linear regressions between values. Results The mechanical varied significantly among calculated showed strong correlation weaker modulus. oblique technique resulted lower enamel dentin enamel/composite compared technique. Conclusion Residual contemporary teeth. Shrinkage tooth correlated shrinkage. In general, stresses than did increments.