Total hip arthroplasty with the MS-30 polished surface cemented stem: a single surgeon consecutive series study at 10 year follow-up

Abstract

The Morscher-Sportorno femoral stem is a stainless steel, straight, three-dimensionally tapered, collarless implant for cemented fixation in total hip replacement. The clinical and radiographic results of this implant at a minimum of 5-year follow-up have been extremely encouraging. However, the results at 10 years have yet to be reported. Therefore, we wished to establish the clinical performance and survival of the polished surface MS-30 femoral stem at a minimum of 10-year follow-up. We report the results at a minimum follow-up of 10 years of a single surgeon series of 55 total hip replacements with the polished surface MS-30 cemented femoral component in 48 consecutive patients aged between 50 and 64. The median period of observation was 12 years (inter-quartile range, 10-13). Six patients died with their implant in situ, and one patient was unable to attend for follow-up. All the remaining 41 patients with 47 total hip replacements were reviewed. All patients were assessed clinically with the use of the Oxford hip score, and radiographs taken at the latest follow-up were evaluated by an independent specialist hip surgeon. To date, none of the implants have been revised. The median Oxford hip score was 13 (inter-quartile range, 12-14). Radiologically, no stems had evidence of loosening on assessment by the Harris criteria, and only 4 hips (8.5 %) had osteolysis adjacent to the stem, mostly in Gruen zone 7. The results of the polished surface MS-30 femoral stem were satisfactory with survivorship at a minimum of 10 years of 100 %. These findings support the continued use of this femoral component.