Long-term comparison of porous and hydroxyapatite sleeves in femoral revision using the S-ROM modular stem.
We prospectively evaluated the results of a single-surgeon series of 28 femoral revision arthroplasties using the S-ROM modular stem with either a porous-coated sleeve (15 hips) or a hydroxyapatite-coated sleeve (13 hips) after a mean of 10 years (range, 8-14 years). Three femoral stems underwent repeat femoral revision for aseptic loosening in association with Paprosky type III bone defects after a mean of 9 years in vivo (range, 8-10 years). One on these 3 had a porous-coated sleeve and the other 2 had a hydroxyapatite-coated sleeve. With repeat revision for any reason as the end point, femoral component survival was 83.8% at 10 years for the entire series, and 93.3% for the porous-coated sleeve group and 76.2% for the hydroxyapatite-coated sleeve group, respectively (log-rank test, P=0.588). No significant difference was detected between the 2 groups regarding postoperative Harris hip scores, bone ingrowth, stress-shielding, osteolysis, or complication rates. At a mean of 10 years postoperatively, hydroxyapatite-coated sleeves offered no clinical benefit over porous-coated sleeves for revision hip replacement using the S-ROM modular stem. Our findings also indicate that hydroxyapatite-coated sleeves did not reduce late mechanical stem failures in cases with a deficient femur.
Park
Youn-Soo
YS
Department of Orthopaedic Surgery, Sungkyunkwan University School of Medicine, Samsung Medical Center, Seoul, South Korea.
Lim
Seung-Jae
SJ
D000328:Adult; D000368:Aged; D019644:Arthroplasty, Replacement, Hip / Q000295:instrumentation*; D017886:Durapatite; D004867:Equipment Design; D019544:Equipment Failure Analysis; D005260:Female; D006801:Humans; D053208:Kaplan-Meier Estimate; D008297:Male; D008875:Middle Aged; D016062:Porosity; D011446:Prospective Studies; D012086:Reoperation / Q000295:instrumentation
D017886:Durapatite