Abstract
This case report follows a woman who had a total hip replacement in 1992 when she was 45 years old. Six serial computed tomography (CT) examinations over a period of 13 years provided information that allowed her revision surgery to be limited to liner replacement as opposed to replacement of the entire prosthesis. Additionally, they provided data that ruled out the presence of osteolysis and indeed none was found at surgery. In 2004, when the first CT was performed, the 3D distance the femoral head had penetrated into the cup was determined to be 2.6 mm. By 2017, femoral head penetration had progressed to 5.0 mm. The extracted liner showed wear at the thinnest part to be 5.5 mm, as measured with a micrometer. The use of modern CT techniques can identify problems, while still correctable without major surgery. Furthermore, the ability of CT to assess the direction of wear revealed that the liner wear changed from the cranial to dorsal direction.
Highlights
Millions of people worldwide have had total hip replacements and especially in younger patients like ours, predominately uncemented prosthetic replacements were used
Prosthetic liner wear and osteolysis can be assessed with clinically acceptable accuracy at a Computed tomography (CT) radiation level on par with conventional plain radiographic examination [6]
This study presents a case of a woman who, in 1992, at the age of 45, had a total hip arthroplasty (THA) and who was subsequently followed with CT
Summary
Prosthetic liner wear in total hip replacement: a longitudinal 13-year study with computed tomography. Lars Weidenhielm1 & Henrik Olivecrona1 & Gerald Q. Received: 6 October 2017 / Revised: 3 January 2018 / Accepted: 4 January 2018 / Published online: 23 January 2018 # The Author(s) 2018.
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