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Ann R Coll Surg Engl ; 104(5): e128-e132, 2022 May.
Article in English | MEDLINE | ID: mdl-34939858

ABSTRACT

Total hip arthroplasty, one of the most successful orthopaedic procedures, is influenced by several variables. Corrosion at the modular junction is known as trunnionosis. Despite being reported infrequently, corrosion between the femoral head and the Morse taper can result in severe complications. Fracture of the femoral component in primary metal-on-metal (MoM) total hip arthroplasty at the Morse taper is an extremely rare event and can be associated with several risk factors. We report a case of corrosion at the Morse taper in a hybrid primary MoM total hip arthroplasty, resulting in Morse taper fracture with consequent femoral head entrapment inside the acetabular component. We hypothesise that some risk factors, such as age over 60years, active male patients, body mass index above 30kg/m2, large femoral heads, high-offset stems, 9/10 Morse taper and MoM-bearing surfaces, are associated with this mode of failure.


Subject(s)
Arthroplasty, Replacement, Hip , Fractures, Bone , Hip Prosthesis , Metal-on-Metal Joint Prostheses , Arthroplasty, Replacement, Hip/adverse effects , Arthroplasty, Replacement, Hip/methods , Fractures, Bone/etiology , Hip Prosthesis/adverse effects , Humans , Male , Metal-on-Metal Joint Prostheses/adverse effects , Metals , Middle Aged , Prosthesis Design , Prosthesis Failure , Reoperation
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