SEDL / STP / STP1272-EB / STP16074S

Methods of Detecting and Predicting Microfracture in Titanium

Kohn, DH
Assistant Professor, and Graduate Research Fellows, School of Dentistry, and Bioengineering Program, University of Michigan, Ann Arbor, MI

Ko, CC
Assistant Professor, and Graduate Research Fellows, School of Dentistry, and Bioengineering Program, University of Michigan, Ann Arbor, MI
Research Associate, Minnesota Dental Research Center for Biomaterials and BiomechanicsUniversity of Minnesota, Minneapolis, MN

Hollister, SJ
Assistant Professor, University of Michigan, Ann Arbor, MI

Snoeyink, D
Assistant Professor, and Graduate Research Fellows, School of Dentistry, and Bioengineering Program, University of Michigan, Ann Arbor, MI

Awerbuch, J
Professor, Drexel University, Philadelphia, PA

Ducheyne, P
Professor, University of Pennsylvania, Philadelphia, PA

Pages: 19    Published: Jan 1996

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Abstract

The mechanics governing the interface between implant surfaces and tissues or between coatings and bulk implant materials is important, particularly for titanium alloys, because of their notch sensitivity. Our work on porous coated titanium has focused on three areas related to interfaces: determining the governing mode of fatigue, detecting incipient damage and monitoring damage accumulation, and quantifying, analytically, stresses at regions of local stress intensification. In this paper, we review our work on fatigue of titanium, extend our acoustic emission (AE) work, in which a protocol for analyzing AE signals in the frequency domain is presented, and introduce a coupled global/local finite element (FE) approach to determine local stresses at any region of an implant.