title: Cementless Gustilo-Kyle and BIAS total hip arthroplasty: 2- to 5-year results.
abstract: We conducted extensive radiographic and clinical examination of 58 cementless total hip arthroplasties. Forty BIAS femoral stems had heads made of Co-base F 75 alloy and 18 Gustilo-Kyle femoral stems had Ti6A14V alloy heads. The cross-sectional geometry and location of the porous coating pads of the two stem types was identical, the BIAS component being slightly shorter. At the last follow-up, 27.8% of the Gustilo-Kyle femoral components and 2.5% of the BIAS femoral components were unstable. None of the acetabular components in the BIAS group as against 38.9% of the acetabular components in the Gustilo-Kyle group demonstrated wear of more than 1 mm. All unstable components which did not suffer intraoperative fracture had also acetabular wear of more than 1 mm. The only case with endosteal erosion was seen in a patient with an unstable implant displaying the most extensive wear. Nonparametric statistical analysis showed that the patients with Ti6A14V/polyethylene bearing surfaces had a statistically significantly higher extent of wear and a statistically significant higher incidence of femoral component loosening than patients with CrCoMo/polyethylene bearing surfaces.
authors.affiliation: Department of Orthopedic Surgery, Rush University, Rush-Presbyterian St. Luke's Medical Center, Chicago, Illinois.
authors.forename: H
authors.initials: H
authors.lastname: Kienapfel
authors.forename: J
authors.initials: J
authors.lastname: Martell
authors.forename: A
authors.initials: A
authors.lastname: Rosenberg
authors.forename: J
authors.initials: J
authors.lastname: Galante
mesh_terms: D000328:Adult; D000368:Aged; D001843:Bone Cements; D005260:Female; D005500:Follow-Up Studies; D006615:Hip / Q000000981:diagnostic imaging / Q000601:surgery; D006622:Hip Prosthesis / Q000295:instrumentation; D006801:Humans; D008297:Male; D008875:Middle Aged; D011474:Prosthesis Design; D011475:Prosthesis Failure; D011859:Radiography
chemical_list: D001843:Bone Cements