The cement-free modular revision prosthesis MRP-hip revision stem prosthesis in clinical follow-up

Zeitschrift für Orthopädie und ihre Grenzgebiete
T MummeD C Wirtz

Abstract

We present prospective medium-term results of the modular revision prostheses "MRP-TITANIUM". 45 patients (n = 48 prostheses) were evaluated. The mean follow-up was 4.7 years (min.-max.: 1.0-9.0 years). Pre- and postoperatively the Harris hip score (differentiated to Paprosky I-III) was examined. 66.67 % of the cases had extensive bony defects (> or = Paprosky II b). By means of X-ray examinations, the stability of the prostheses, periprosthetic bone remodelling, the presence of radiolucent lines as well as bone defect regeneration were assessed postoperatively. The mean Harris hip score improved from 25.6 preoperative to 71.4 postoperative (p < or = 0.05). In 44 cases the X-ray showed stable fixation without secondary migration. In one case the stem (stand time 2.36 years) was revised due to secondary migration (> or = 5 mm). The survival rate (Kaplan-Meier) was 97 %. Bone transplantation with consecutive defect regeneration was (n = 30) complete in all cases. In six cases (12.5 %) a postoperative dislocation occurred with subsequent successful closed reposition four times (8.3 %). In two cases (4.2 %) an open reposition was done with correction of the antetorsion angle of the prostheses. The "MRP-TITANIUM modular revision pro...Continue Reading

Citations

Apr 17, 2010·Der Orthopäde·M ThomsenE Jakubowitz
Jan 5, 2014·International Orthopaedics·Stefan KinkelEike Jakubowitz
Feb 19, 2015·International Orthopaedics·Maik HobergMaximilian Rudert
Jul 15, 2015·International Orthopaedics·Stefan KinkelEike Jakubowitz
Sep 29, 2009·Der Orthopäde·M D SchoferJ Schmitt
Dec 25, 2013·Clinical Orthopaedics and Related Research·Kevin L GarvinElizabeth R Lyden

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