Uncemented femoral revision arthroplasty using a modular tapered, fluted titanium stem: 5- to 16-year results of 163 cases

Wirtz DC, Gravius S, Ascherl R, Thorweihe M, Forst R, Noeth U, Maus UM, Wimmer MD, Zeiler G, Deml MC (2014)

Publication Type: Journal article

Publication year: 2014

Journal

Acta Orthopaedica Informa Healthcare

Publisher: Informa Healthcare

Book Volume: 85

Pages Range: 562-9

Journal Issue: 6

DOI: 10.3109/17453674.2014.958809

Abstract

Due to the relative lack of reports on the medium- to long-term clinical and radiographic results of modular femoral cementless revision, we conducted this study to evaluate the medium- to long-term results of uncemented femoral stem revisions using the modular MRP-TITAN stem with distal diaphyseal fixation in a consecutive patient series.We retrospectively analyzed 163 femoral stem revisions performed between 1993 and 2001 with a mean follow-up of 10 (5-16) years. Clinical assessment included the Harris hip score (HHS) with reference to comorbidities and femoral defect sizes classified by Charnley and Paprosky. Intraoperative and postoperative complications were analyzed and the failure rate of the MRP stem for any reason was examined.Mean HHS improved up to the last follow-up (37 (SD 24) vs. 79 (SD 19); p<0.001). 99 cases (61%) had extensive bone defects (Paprosky IIB-III). Radiographic evaluation showed stable stem anchorage in 151 cases (93%) at the last follow-up. 10 implants (6%) failed for various reasons. Neither a breakage of a stem nor loosening of the morse taper junction was recorded. Kaplan-Meier survival analysis revealed a 10-year survival probability of 97% (95% CI: 95-100).This is one of the largest medium- to long-term analyses of cementless modular revision stems with distal diaphyseal anchorage. The modular MRP-TITAN was reliable, with a Kaplan-Meier survival probability of 97% at 10 years.

Authors with CRIS profile

Raimund Forst Departement of Orthopaedic Surgery

Involved external institutions

Zeisigwaldkliniken Bethanien Chemnitz DE Germany (DE) Pius-Hospital Oldenburg DE Germany (DE) Krankenhaus Rummelsberg DE Germany (DE)

How to cite

APA:

Wirtz, D.C., Gravius, S., Ascherl, R., Thorweihe, M., Forst, R., Noeth, U.,... Deml, M.C. (2014). Uncemented femoral revision arthroplasty using a modular tapered, fluted titanium stem: 5- to 16-year results of 163 cases. Acta Orthopaedica, 85(6), 562-9. https://dx.doi.org/10.3109/17453674.2014.958809

MLA:

Wirtz, Dieter C., et al. "Uncemented femoral revision arthroplasty using a modular tapered, fluted titanium stem: 5- to 16-year results of 163 cases." Acta Orthopaedica 85.6 (2014): 562-9.

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