Dental Materials Journal
Online ISSN : 1881-1361
Print ISSN : 0287-4547
ISSN-L : 0287-4547
Original Paper
Three-dimensional X-ray micro-computed tomography analysis of polymerization shrinkage vectors in flowable composite
Yukihiko TAKEMURAKoji HANAOKARyota KAWAMATATakashi SAKURAIToshio TERANAKA
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JOURNAL FREE ACCESS

2014 Volume 33 Issue 4 Pages 476-483

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Abstract

The polymerization shrinkage of flowable resin composites was evaluated using air bubbles as traceable markers. Three different surface treatments i.e. an adhesive silane coupling agent, a separating silane coupling agent, and a combination of both, were applied to standard cavities. Before and after polymerization, X-ray micro-computed tomography images were recorded. Their superimposition and comparison allowed position changes of the markers to be visualized as vectors. The movement of the markers in the resin composite was, therefore, quantitatively evaluated from the tomographic images. Adhesion was found to significantly influence shrinkage patterns. The method used here could be employed to visualize shrinkage vectors and shrinkage volume.

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© 2014 The Japanese Society for Dental Materials and Devices
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