Mechanical properties of glass fiber-reinforced endodontic posts

被引：33

作者：

Cheleux, Nicolas ^{[2
]}

Sharrock, Patrick J. ^{[1
]}

机构：

[1] Paul Sabatier Univ Toulouse, LERISM, Castres Inst Technol, F-81104 Castres, France

[2] Univ Toulouse 3, Fac Odontol, F-31062 Toulouse, France

来源：

ACTA BIOMATERIALIA | 2009年 / 5卷 / 08期

关键词：

Composites; Endodontic posts; Glass fibers; Mechanical strength; 3-POINT BENDING TEST; TREATED TEETH; STRUCTURAL CHARACTERISTICS; FLEXURAL PROPERTIES; FATIGUE-RESISTANCE; FRACTURE; SYSTEMS; STRENGTH; RESIN; DESIGN;

D O I：

10.1016/j.actbio.2009.04.008

中图分类号：

R318 [生物医学工程];

学科分类号：

0831 ;

摘要：

Five types of posts from three different manufacturers (RTD, France, Carbotech, France and Ivoclar-Vivadent, Liechenstein) were subjected to three-point bending tests in order to obtain fatigue results, flexural strength and modulus. Transverse and longitudinal polished sections were examined by scanning electron microscopy and evaluated by computer-assisted image analysis. Physical parameters, including volume % of fibers, their dispersion index and coordination number, were calculated and correlated with mechanical properties. The weaker posts showed more fiber dispersion, higher resin contents, larger numbers of visible defects and reduced fatigue resistance. The flexural strength was inversely correlated with fiber diameter and the flexural modulus was weakly related to coordination number, volume % of fibers and dispersion index. The interfacial adhesion between the silica fibers and the resin matrix was observed to be of paramount importance. (C) 2009 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

引用

页码：3224 / 3230

页数：7

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