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Hydroxyapatite-coated total knee arthroplasty in rheumatoid arthritis patients: a short-term follow-up study
Najam Siddiqi1, Hajime Sugiyama, Tadahiro Horiuchi
1Department of Orthopaedic Surgery, Foundation University Medical College, Rawalpindi, Pakistan. najami69@hotmail.com
Objective:
To determine the outcome of cementless hydroxyapatite-coated total knee prosthesis in rheumatoid patients.
Design:
Analytical.
Place And Duration Of Study:
University of Yamanashi Hospital, Japan, from October 1999 to September 2002.
Patients And Methods:
Twenty total knee arthroplasties using HA-coated Scorpio Superflex CR and Delta 7000 series were performed in 17 rheumatoid patients. Pre and postoperative results were compared using JOA scores.
Results:
Male: female ratio was 16:1, average age was 67 years and mean duration of follow-up was two years. JOA scores improved significantly (p<0.05) postoperatively from an average of 37 to 80. Varus and valgus angular deformities improved significantly and 90% of the knees had alignment between zero and 5 degrees of valgus angulation with an average tibiofemoral angle (FTA) of 172. The radiographic findings revealed no radiolucent lines at two years follow-up. Distal femur osteolysis was not observed.
Conclusion:
The clinical results were excellent at 2-year follow-up, which are in agreement with other reports using hydroxyapatite-coated knee prosthesis.