title: A randomized clinical trial of cementless femoral stems with and without hydroxyapatite/tricalcium-phosphate coating: an 8- to 12-year follow-up study.
abstract: To evaluate the effect of hydroxyapatite coating on cementless femoral stem, a prospective randomized clinical trial was conducted. A total of 84 hips from 69 patients were assigned to a hydroxyapatite/tricalcium-phosphate-coated group or a noncoated group. Thirty-two patients (37 hips) who received hydroxyapatite/tricalcium-phosphate-coated stems and 31 patients (38 hips) who received noncoated stems were followed for an average of 127 months. Forty-nine patients (78%) were men, and the average age was 45.5 years. Preoperative diagnosis was osteonecrosis in 62 hips (83%). The mean Harris hip score at the time of final follow-up was 91 points in the coated group and 90 points in the noncoated group. Six acetabular components (3 in each group) were revised. One femoral stem in the noncoated group was loose. There was no statistical difference in the survival distributions of the implants between the 2 groups.
authors.affiliation: Department of Orthopaedic Surgery, Seoul National University College of Medicine, Seoul, South Korea.
authors.forename: Kang Sup
authors.initials: KS
authors.lastname: Yoon
authors.forename: Hee Joong
authors.initials: HJ
authors.lastname: Kim
authors.forename: Ji Ho
authors.initials: JH
authors.lastname: Lee
authors.forename: Seung Baik
authors.initials: SB
authors.lastname: Kang
authors.forename: Nak Hoon
authors.initials: NH
authors.lastname: Seong
authors.forename: Kyung-Hoi
authors.initials: KH
authors.lastname: Koo
mesh_terms: D000328:Adult; D000368:Aged; D019644:Arthroplasty, Replacement, Hip; D002130:Calcium Phosphates; D005260:Female; D005271:Femur Head Necrosis / Q000601:surgery*; D005500:Follow-Up Studies; D006622:Hip Prosthesis; D006801:Humans; D006882:Hydroxyapatites; D008297:Male; D008875:Middle Aged; D011474:Prosthesis Design
chemical_list: D002130:Calcium Phosphates; D006882:Hydroxyapatites; C094280:hydroxyapatite-tricalciumphosphate composite