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Successful hip arthroplasty using cementless titanium implants in rheumatoid arthritis
Harald Effenberger1, Thomas Ramsauer, Gerhard Böhm
1Department of Orthopaedics, Salzburg General Hospital, Müllner Hauptstrasse 48, 5020 Salzburg, Austria. h.effenberger@telering.at
Archives of Orthopaedic and Trauma Surgery
|March 7, 2002
Summary
Cementless hip arthroplasty in rheumatoid arthritis patients significantly improves hip function. Titanium implants demonstrate excellent medium-term outcomes with high rates of bone ingrowth and minimal complications.
Area of Science:
- Orthopedic Surgery
- Biomaterials Science
- Rheumatology
Background:
- Rheumatoid arthritis (RA) frequently affects the hip joint, necessitating surgical intervention.
- Cementless hip arthroplasty is a common treatment option for RA patients.
- Evaluating the long-term efficacy and radiographic outcomes of cementless implants is crucial.
Purpose of the Study:
- To assess the clinical and radiographic outcomes of cementless hip prostheses in patients with rheumatoid arthritis.
- To evaluate bone ingrowth and radiolucency around threaded cups and stems.
- To analyze femoral bone remodeling and its correlation with clinical symptoms.
Main Methods:
- Retrospective analysis of 76 cementless hip prostheses implanted over eight years.
- Clinical assessment using the Harris Hip Score (HHS).
- Radiographic evaluation for bone ingrowth, radiolucency, and femoral remodeling.
Main Results:
- Significant improvement in mean HHS from 33 to 85 after an average of 49 months.
- High rates of bone ingrowth for Hofer-Imhof threaded cups (88% Type 0).
- Low rates of radiolucency around stems (83% Type 0) and moderate femoral remodeling.
Conclusions:
- Cementless hip arthroplasty with titanium implants yields excellent medium-term clinical and radiographic results in RA patients.
- Hofer-Imhof threaded cups demonstrate favorable bone ingrowth.
- The observed bone remodeling and radiolucency did not correlate with adverse clinical symptoms.