A randomized clinical trial of cementless femoral stems with and without hydroxyapatite/tricalcium-phosphate coating: an 8- to 12-year follow-up study.
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.
Yoon
Kang Sup
KS
Department of Orthopaedic Surgery, Seoul National University College of Medicine, Seoul, South Korea.
Kim
Hee Joong
HJ
Lee
Ji Ho
JH
Kang
Seung Baik
SB
Seong
Nak Hoon
NH
Koo
Kyung-Hoi
KH
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
D002130:Calcium Phosphates; D006882:Hydroxyapatites; C094280:hydroxyapatite-tricalciumphosphate composite