Mechanical properties of glass fiber-reinforced endodontic posts.

Abstract

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.

• Authors: Nicolas Cheleux, Patrick J Sharrock
• Journal: Acta biomaterialia (Acta Biomater) Vol. 5 Issue 8 Pg. 3224-30 (Oct 2009) ISSN: 1878-7568 [Electronic] England
• PMID: 19428317 (Publication Type: Evaluation Study, Journal Article)

Chemical References

• Dental Materials
• fiberglass

Topics

• Adhesiveness
• Compressive Strength
• Dental Implantation, Endosseous, Endodontic
• Dental Materials (chemistry)
• Dental Stress Analysis
• Elastic Modulus
• Glass (chemistry)
• Hardness
• Materials Testing
• Post and Core Technique (instrumentation)
• Tensile Strength