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Broken Austin Moore's Prosthesis - a fatigue or failure

by orthopaedic surgeon at Choithram Hospital & Research Centre on Oct 03, 2013

  • 637 views

broken AMP, Calcar hypertrophy, lateral wall thickening, Austin Moore prosthesis long term follow up, AMP with anterior thigh pain

broken AMP, Calcar hypertrophy, lateral wall thickening, Austin Moore prosthesis long term follow up, AMP with anterior thigh pain

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  • naneria Vinod Naneria, orthopaedic surgeon at Choithram Hospital & Research Centre 'Modes of failure' of cemented stem-type femoral components: a radiographic analysis of loosening.
    Gruen TA, McNeice GM, Amstutz HC.
    Clin Orthop Relat Res. 1979 Jun;(141):17-27.

    Prosthesis & nails are different ball games.
    Can galvanic corrosion play a role?
    Scratches occurred at screw holes during insertional attempts of interlocking screws with screw hole acting as a stress riser. Many a times the nail may have broken long before,Its perceived on the xrays only later.
    Prosthesis on the other hand is continuously subjected to cyclical loading.Distally well fixed prosthesis(typical Gruen's type IV) failure occurs ultimately when the fatigue limit of the metal exceeds the no. of cyclical loads it can bear.Laser etching marks(company marks etc)exactly at the high stress zones(i.e upper 1/3 rd & lower 2/3rd area) , air bubbles in the metal alloy typically as occurs in stainless steel(316L) make the prosthesis more prone to #.
    Dr. Mohan M Desai
    Professor,Seth GSMC,KEMH,Mumbai
    4 months ago
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  • naneria Vinod Naneria, orthopaedic surgeon at Choithram Hospital & Research Centre 'Modes of failure' of cemented stem-type femoral components: a radiographic analysis of loosening.
    Gruen TA, McNeice GM, Amstutz HC.
    Clin Orthop Relat Res. 1979 Jun;(141):17-27.
    PMID: 477100 [PubMed - indexed for MEDLINE]
    4 months ago
    Are you sure you want to
    Your message goes here
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Broken Austin Moore's Prosthesis - a fatigue or failure Broken Austin Moore's Prosthesis - a fatigue or failure Presentation Transcript