Biomechanics: Basic and Applied Research pp 365-372 | Cite as
On Laboratory Experiences in Endurance Testing of Anchorage Stems of Hip Joint Endoprostheses
Chapter
Abstract
High dynamic bending and torsional stresses may give rise to fatigue and stress corrosion failures of prosthetic stems of total hip joint devices in case of loosening, which up till now remains one of the major problems of hip joint replacement. A safety limit of 3–5 million cycles has been settled upon the basis of clinical experience with loosened femoral components /1/ and should contribute to preventing the removal of distal stem fragments involving aggravated conditions to reoperation.
Keywords
Femoral Component Torsional Moment Torsional Stress Cobalt Chromium Stem Design
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References
- 1.Semlitsch, M.: Mechanical Properties of Selected Implant Metals Used for Artificial Hip Joints. CRC Press Boca Raton, Vol. II (1984), 1–21Google Scholar
- 2.Plitz W: Prüfung mechanischer Eigenschaften orthopädischer Implantate, insbesondere von Gelenkprothesen. BMFT Forschungsbericht T 81–016 (1981), 13–17, 41–42Google Scholar
- 3.Ungethüm, M.: Technologische und biomechanische Aspekte der Hüft- und Kniealloarthroplastic; Statisch-biomechanische Spannungsanalysen und dynamische Prüfungen von Hüftprothesen. Verlag Hans Huber, Bern, Stuttgart, Wien (1978), 90–110Google Scholar
Copyright information
© Martinus Nijhoff Publishers, Dordrecht 1987