Fatigue resistance analysis of tibial baseplate in total knee prosthesis—An in vitro biomechanical study

Yu, Tzai Chiu; Huang, Chang Hung; Hsieh, Chia Hsun; Liau, Jiann‐Jong; Huang, Chin Chou; Cheng, Cheng‐Kung

doi:10.1016/j.clinbiomech.2005.08.009

Cited by 6 publications

(2 citation statements)

References 19 publications

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“…However, no loads are specified within these documents. There is only secondary literature available on this purpose, where unicondylar loads of 500 or 900 N are recommended for fatigue testing (Ahir et al, 1999;Yu et al, 2006). We consider these loads to be too low to evaluate the special design features of the instrumented tibial tray.…”

Section: Pre-clinical Testingmentioning

confidence: 97%

Design, calibration and pre-clinical testing of an instrumented tibial tray

Heinlein

Graichen

Bender

et al. 2007

Journal of Biomechanics

123

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Section: Pre-clinical Testingmentioning

confidence: 97%

Design, calibration and pre-clinical testing of an instrumented tibial tray

Heinlein

Graichen

Bender

et al. 2007

Journal of Biomechanics

123

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“…Loss of bony support, due to stress shielding bone remodeling, osteolysis, severe varus or valgus deformities, poor fixation or axial malalignment, is the main cause affecting the fatigue performance, as it results in overloading of the component. The design and the manufacturing process are the crucial parameters influencing the tibial tray fatigue limit [13][14][15][16].…”

Section: Mechanical Characterizationmentioning

confidence: 99%

Tribological and mechanical performance evaluation of metal prosthesis components manufactured via metal injection molding

Melli

Juszczyk²,

Sandrini³

et al. 2015

J Mater Sci: Mater Med

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The increasing number of total joint replacements, in particular for the knee joint, has a growing impact on the healthcare system costs. New cost-saving manufacturing technologies are being explored nowadays. Metal injection molding (MIM) has already demonstrated its suitability for the production of CoCrMo alloy tibial trays, with a significant reduction in production costs, by holding both corrosion resistance and biocompatibility. In this work, mechanical and tribological properties were evaluated on tibial trays obtained via MIM and conventional investment casting. Surface hardness and wear properties were evaluated through Vickers hardness, scratch and pin on disk tests. The MIM and cast finished tibial trays were then subjected to a fatigue test campaign in order to obtain their fatigue load limit at 5 millions cycles following ISO 14879-1 directions. CoCrMo cast alloy exhibited 514 HV hardness compared to 335 HV of MIM alloy, furthermore it developed narrower scratches with a higher tendency towards microploughing than microcutting, in comparison to MIM CoCrMo. The observed fatigue limits were (1,766 ± 52) N for cast tibial trays and (1,625 ± 44) N for MIM ones. Fracture morphologies pointed out to a more brittle behavior of MIM microstructure. These aspects were attributed to the absence of a fine toughening and surface hardening carbide dispersion in MIM grains. Nevertheless, MIM tibial trays exhibited a fatigue limit far beyond the 900 N of maximum load prescribed by ISO and ASTM standards for the clinical application of these devices.

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