Evaluation of crack propagation in dental composites by optical coherence tomography

被引：42

作者：

Braz, Ana K. S. ^{[1
]}

Kyotoku, Bernardo B. C.

Braz, Rodivan ^{[2
,3
]}

Gomes, Anderson S. L. ^{[1
]}

机构：

[1] Univ Fed Pernambuco, Grad Program Odontol, BR-54510440 Recife, PE, Brazil

[2] Univ Pernambuco, Grad Program Odontol, Recife, PE, Brazil

[3] Univ Fed Pernambuco, Dept Phys, BR-54510440 Recife, PE, Brazil

来源：

DENTAL MATERIALS | 2009年 / 25卷 / 01期

关键词：

Optical coherence tomography; Crack propagation; Dental composites; RESTORATIVE MATERIALS; FATIGUE BEHAVIOR; ULTRAHIGH-RESOLUTION; FLEXURAL PROPERTIES; RESIN COMPOSITE; ORAL-CAVITY; SOFT-TISSUE; FIBER; GLASS; HARD;

D O I：

10.1016/j.dental.2008.04.011

中图分类号：

R78 [口腔科学];

学科分类号：

1003 ;

摘要：

Objectives. The purpose of this study was to image the sites of fracture initiation and slow crack propagation in a fiber reinforced composite, using the optical coherence tomography (OCT) technique. Methods. Bar specimens (2 mm x 3 mm x 25 mm) of fiber reinforced composite were mechanically and thermally cycled to emulate oral conditions. The interior of these samples was analyzed prior to and after loading, using OCT. The device used was a home-built Fourier domain OCT setup working at 800 nm with 6 mu m spatial resolution. Results. Intact specimens after load cycling were analyzed. It was clearly seen that OCT images provide an insight into crack propagation, which is not seen by the naked eye. Significance. By using OCT the possibility of analyzing the fracture propagation quantitatively, and in depth, was added, opening up possibilities to quantitative studies. (C) 2008 Academy of Dental Materials. Published by Elsevier Ltd. All rights reserved.

引用

页码：74 / 79

页数：6

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