title: Three-dimensional X-ray micro-computed tomography analysis of polymerization shrinkage vectors in flowable composite.
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.
authors.affiliation: Department of Cariology and Restorative Dentistry, Graduate School of Dentistry, Kanagawa Dental University.
authors.forename: Yukihiko
authors.initials: Y
authors.lastname: Takemura
authors.forename: Koji
authors.initials: K
authors.lastname: Hanaoka
authors.forename: Ryota
authors.initials: R
authors.lastname: Kawamata
authors.forename: Takashi
authors.initials: T
authors.lastname: Sakurai
authors.forename: Toshio
authors.initials: T
authors.lastname: Teranaka
mesh_terms: D003188:Composite Resins; D003764:Dental Materials; D008422:Materials Testing; D058105:Polymerization; D055114:X-Ray Microtomography / Q000379:methods*
chemical_list: D003188:Composite Resins; D003764:Dental Materials