title: The effect of collar on aseptic loosening and proximal femoral bone resorption in hybrid total hip arthroplasty.
abstract: This study compared proximal femoral bone resorption in hybrid total hip arthroplasty cases that had poor or good contact between the collar and proximal medial femoral neck. A total of 94 patients (102 hips) comprised the study group. Mean patient age was 52 years, and mean follow-up was 4.86 years. Bone resorption of the proximal femur was evaluated with immediate postoperative and follow-up anteroposterior and lateral radiographs. Statistical analysis using the Mann-Whitney test showed no significant difference between the groups that had good or poor contact. The collar did not prevent calcar resorption even when ideal contact was achieved.
authors.affiliation: Department of Orthopedics and Traumatology, Hacettepe University Faculty of Medicine, 06100, Sihhiye, Ankara, Turkey.
authors.forename: Omur
authors.initials: O
authors.lastname: Caglar
authors.forename: Bulent
authors.initials: B
authors.lastname: Atilla
authors.forename: Mazhar
authors.initials: M
authors.lastname: Tokgozoglu
authors.forename: Mumtaz
authors.initials: M
authors.lastname: Alpaslan
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D019644:Arthroplasty, Replacement, Hip / Q000009:adverse effects*; D001862:Bone Resorption / Q000000981:diagnostic imaging* / Q000209:etiology*; D019544:Equipment Failure Analysis; D005260:Female; D005269:Femur / Q000000981:diagnostic imaging* / Q000601:surgery*; D006801:Humans; D007593:Joint Instability / Q000000981:diagnostic imaging* / Q000209:etiology*; D008297:Male; D008875:Middle Aged; D011475:Prosthesis Failure; D011859:Radiography; D055815:Young Adult