Figures & data
Figure 1. The MRP-TITAN curved stem, shown with and without proximal extension and distal locking bolts.
Table 1. Patient data
Table 2. Pre- and postoperative Harris hip score in relation to Charnley classification and to the prevailing bone defects classified by the criteria of Paprosky et al.
Figure 2. Pre- and postoperative HHS values according to the Charnley classification.
Figure 3. Pre- and postoperative HHS values according to the Paprosky classification.
Table 3. Complications
Figure 4. Subsidence with aseptic loosening of an MRP stem 2 years after revision. Revision of an aseptic loosened cementless stem and rough-surfaced Judet cup was performed with a curved MRP stem and a cementless cup in a 77-year-old man. 2 years after revision, there was a proximal 15 mm of subsidence with clinically almost fully impaired function. After exclusion of a periprosthetic infection by joint aspiration and microbiological investigation, a re-revision of the stem was performed. The cup showed a proper thigh ingrowth. A thicker MRP stem was implanted, showing good osseous integration 8 years postoperatively.
Figure 5. A 75-year-old male patient with periprosthetic infection 13.8 years after revision surgery. Explantation with a femoral fenestration and a wide debridement was performed. Two months later, the infection consolidated; thus, a re-revision with a curved MRP stem and a cementless cup could be performed. The previously performed fenestration was secured with 2 wires around the femur.
Table 4. Failures
Figure 6. Kaplan-Meier overall survival rate.
Table 5. Details of Kaplan-Meier overall survival rate
Figure 7. Kaplan-Meier survival rate according to size of the femoral defect (Paprosky).
Figure 8. Kaplan-Meier survival rate according to comorbidities (Charnley classification).
Table 6. Details of Kaplan-Meier survival rate according to size of the femoral defect (Paprosky)
Table 7. Details of Kaplan-Meier survival rate according to comorbidities (Charnley classification)