TY  - JOUR
A1  - Wirtz, Dieter C.
A1  - Gravius, Sascha
A1  - Ascherl, Rudolf
A1  - Thorweihe, Miguel
A1  - Forst, Raimund
A1  - Noeth, Ulrich
A1  - Maus, Uwe M.
A1  - Wimmer, Matthias D.
A1  - Zeiler, Guenther
A1  - Deml, Moritz C.
T1  - Uncemented femoral revision arthroplasty using a modular tapered, fluted titanium stem 5-to 16-year results of 163 cases
JF  - Acta Orthopaedica
N2  - Background and purpose - 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. 
Patients and methods - 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. 
Results - 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). 
Interpretation - This is one of the largest medium- to longterm 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.
KW  - follow-up
KW  - distal fixation
KW  - bone loss
KW  - replacement
KW  - register
KW  - junction
KW  - cement
KW  - prosthesis
KW  - roentgenographic assessment
KW  - total HIP-arthroplasty
Y1  - 2014
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-114555
SN  - 1745-3674
VL  - 85
IS  - 6
ER  -