Midterm Results of Metasul Metal-on-Metal Total Hip Arthroplasty

  • Saito S.
  • Ryu J.
  • Watanabe M.
 et al. 
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Abstract

We assessed 106 total hip arthroplasties performed with a new metal-on-metal hip system; the patients were monitored for at least 5 years. The average Harris Hip Score of the patients was 39.5 points before surgery and 87.8 points at final follow-up evaluation. Radiographically, the acetabular component was stable in 103 hips and possibly unstable in 3 hips. The femoral component was bone ingrown in 97 hips and stable and fibrous in 9. After surgery, 6 hips dislocated. The polyethylene liner dissociated in one patient. No patient exhibited clear signs of loosening, migration, or osteolysis. Distal femoral cortical hypertrophy was seen in 35.8% of the cases. Survival at the mean follow-up point (6.4 years) was 99.1%. There was no significant difference in serum chromium concentration between metal-on-metal bearings and polyethylene-on-metal bearings (control subjects). This study found that metal-on-metal total hip arthroplasty produces excellent midterm results. (copyright) 2006 Elsevier Inc. All rights reserved.

Author-supplied keywords

  • Adult
  • Aged
  • Chromium
  • Female
  • Femur
  • Harris hip score
  • Hip
  • Hip Dislocation
  • Male
  • Metasul
  • Osteolysis
  • Polyethylene
  • Radiography
  • Survival Rate
  • Treatment Outcome
  • article
  • controlled study
  • follow up
  • human
  • joint stability
  • major clinical study
  • metal
  • outcome assessment
  • prosthesis loosening
  • statistical significance
  • total hip prosthesis

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Authors

  • Saito S.

  • Ryu J.

  • Watanabe M.

  • Ishii T.

  • Saigo K.

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