Results
Mean subsidence among all implants was 0.3 cm (range, 0.0–1.2 cm); subsidence averaged 0.28 cm and 0.38 cm for nonmodular and modular implants, respectively. No re-revisions were performed for stem subsidence.
Leg-length discrepancy improved from a mean 1.5 cm preoperatively to 0.79 cm postoperatively for all implants. The average preoperative leg-length discrepancies among patients treated with modular and nonmodular implants were 2.6 and 1.1 cm, respectively; the average postoperative leg-length discrepancy was 1.6 and 0.5 cm, respectively. The mean difference in preoperative and postoperative leg-length discrepancy measured 0.99 cm and 0.61 cm for modular and nonmodular implants, respectively. There were no re-revisions performed for leg-length inequality.
Postoperative dislocation occurred in two patients, both with type IV femoral defects treated with a nonmodular implant. There were no cases of stem loosening or taper fracture.