SYMPOSIA PAPER Published: 01 January 1983
STP28939S

Comparison of the Fatigue Strength of Femoral Prosthesis Stems Made of Forged Ti-Al-V and Cobalt-Base Alloys

Source

No breakage of femoral prosthesis stems made of hot-forged cobalt-base or titanium-base alloys has been reported since 1972, in spite of their being loosened and severely overstressed. The minimum requirements imposed on fracture-resistant femoral prosthesis stems were established in laboratory tests and studies lasting several years. The results of these time-consuming and costly efforts have been confirmed by the nonoccurrence of fatigue fractures in more than 350 000 original Mueller and Weber hip joint prostheses with stems made of hot-forged, high-strength Co-Ni-Cr-Mo Protasul-10 alloy, one of the future-oriented alloys used for biocompatible and highly stressed long-term implants. Straight-stem hip prostheses made of hot-forged Ti-Al-V alloy in combination with ceramic Biolox ball heads give promising results, as has been demonstrated by extensive laboratory tests. This must be further confirmed, however, in long-term field studies.

Author Information

Semlitsch, MF
Sulzer Brothers Limited, Winterthur, Switzerland
Panic, B
Sulzer Brothers Limited, Winterthur, Switzerland
Weber, H
Sulzer Brothers Limited, Winterthur, Switzerland
Schoen, R
Sulzer Brothers Limited, Winterthur, Switzerland
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Details
Developed by Committee: B10
Pages: 120–135
DOI: 10.1520/STP28939S
ISBN-EB: 978-0-8031-4862-8
ISBN-13: 978-0-8031-0241-5