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

Carlos José Soares, Aline Aredes Bicalho, Daranee Versluis, Antheunis Versluis

Research output: Contribution to journalArticle

35 Citations (Scopus)

Abstract

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

Original languageEnglish (US)
Pages (from-to)341-350
Number of pages10
JournalJournal of Adhesive Dentistry
Volume15
Issue number4
DOIs
StatePublished - Jan 1 2013

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Composite Resins
Bicuspid
Polymerization
Elastic Modulus
Gels
Tooth
Dental Enamel
Hardness
Dentin
Linear Models

All Science Journal Classification (ASJC) codes

  • Medicine(all)

Cite this

Polymerization shrinkage stresses in a premolar restored with different composite resins and different incremental techniques. / Soares, Carlos José; Bicalho, Aline Aredes; Versluis, Daranee; Versluis, Antheunis.

In: Journal of Adhesive Dentistry, Vol. 15, No. 4, 01.01.2013, p. 341-350.

Research output: Contribution to journalArticle

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