Abstract
BackgroundCeramic bearings in total hip arthroplasty (THA) have been introduced in clinical practice to minimize the problem of polyethylene particle–induced osteolysis. The aim of the study is to report the results of 68 consecutive alumina-on-alumina THAs done in 61 patients for avascular necrosis (AVN) of the femoral head.Materials and methodsIn all implants a press-fit cup was used; it was combined with a 32-mm alumina head and with titanium-alloy stems. The mean age at surgery was 50 years. At an average follow-up of 13 years two hips have been revised, one for periprosthetic infection and one for excessive abduction of the cup.ResultsNo revision for aseptic loosening is recorded; one anatomical cementless femoral stem had radiological evidence of definite aseptic loosening. No dislocations occurred, and no osteolysis was observed.ConclusionsThe results support the application of alumina-alumina THA for long-lasting replacements.
Highlights
Avascular necrosis (AVN) of the femoral head is due to a compromised blood supply to the femoral head, leading to necrosis of osteocytes, localized resorption and collapse of bone
Background Ceramic bearings in total hip arthroplasty (THA) have been introduced in clinical practice to minimize the problem of polyethylene particle–induced osteolysis
The aim of the study is to report the results of 68 consecutive alumina-on-alumina THAs done in 61 patients for avascular necrosis (AVN) of the femoral head
Summary
Avascular necrosis (AVN) of the femoral head is due to a compromised blood supply to the femoral head, leading to necrosis of osteocytes, localized resorption and collapse of bone. Pulsed electromagnetic field treatment may be indicated in the early stages of osteonecrosis to either preserve the hip or delay the time until surgery. Massari et al [2] showed that pulsed electromagnetic fields preserved 94% of Ficat stage I or II hips. For late stages of the disease, THA, providing early pain relief and good functional outcome, is claimed to be the treatment of choice; some studies have reported high mechanical failure rates, indicating that osteonecrosis itself could represent a risk factor [4,5,6]. The aim of the study is to report the results of 68 consecutive alumina-on-alumina THAs done in 61 patients for avascular necrosis (AVN) of the femoral head. At an average follow-up of 13 years two hips have been revised, one for periprosthetic infection and one for excessive abduction of the cup
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