Dynamics of composite polymerization mediates the development of cuspal strain.
作者： S. Bouillaguet , J. Gamba , J. Forchelet , I. Krejci , J.C. Wataha
DOI: 10.1016/J.DENTAL.2005.11.017
关键词: Deformation (engineering) 、 Composite material 、 Restorative material 、 Materials science 、 Polymerization 、 Resin composite 、 Strain (chemistry) 、 Composite number 、 Shrinkage 、 Electronic speckle pattern interferometry
摘要: Abstract Objectives In the current study, we used electronic speckle pattern interferometry (ESPI) to measure tooth deformation in response polymerization of five resin composites with a range shrinkage. Our hypothesis was that higher shrinkage should cause more cuspal strain as measured by ESPI. Methods Standardized MOD cavities were prepared and placed into ESPI apparatus before filled (n = 10). The constructed out-of-plane displacement lingual cusps teeth during restorative material. A thermocouple attached specimen monitor thermal changes throughout process. Results Experiments empty preparations demonstrated technique temporally responsive sensitive dimensional changes. However, correlation between composite resins ESPI-measured not straightforward. particular, flowable material did deform significantly conventional hybrid. Further, an experimental silorane (with lowest axial shrinkage) induced least deformation. Significance We concluded is viable method for assessing bonded restorations, but data may overestimate shrinkage-induced rate appeared mediate development strain.
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