Prospective study of 100 consecutive Harris-Galante porous total hip arthroplasties. 4- to 8-year follow-up study.

Abstract

This prospective study evaluates 100 consecutive Harris-Galante Porous (Zimmer, Warsaw, IN) noncemented femoral prostheses 4 to 8 years after surgery. Two femoral components were revised for aseptic loosening. The mean Harris hip score was 56 before surgery and 92 at final follow-up evaluation, with moderate thigh pain seen in 6%. Ingrowth was classified as bony (89%), stable fibrous (8%), and unstable (3%). A pedestal formed in 18%, measurable subsidence occurred in 22%, and endosteal erosion occurred in 12%. Patients with pedestal formation had a higher incidence of unstable growth pattern (P < .05). Patients with bony ingrowth had a lower mean subsidence (0.38 mm) than those with fibrous stable ingrowth (3 mm) and unstable ingrowth (7.5 mm) (P < .05). Thigh pain correlated with the type of ingrowth, and endosteal erosion with the linear polyethylene wear. Survival analysis was 97.5% at 8 years.