title: Osteointegration of 96 cementless hip prostheses with hydroxyapatite coating; 5 years follow-up.
abstract: Since 1988 at total of 96 hip prostheses with hydroxyapatite coating (HA) for both the acetabular and the femoral components have been used. HA is considered to be a biocompatible material, with a considerable capacity for osteointegration with evident osteophilia. Close integration between this material and bone tissue is determined by the formation of chemical bonds, and this leads to the development of osteoid tissue and newly-formed bone trabeculae. Based on the radiographic evaluation criteria described by Engh in 1990 and with reference to the concepts of stability and fixation of the prosthesis to the bone, it was observed that radiographic signs of osteointegration are manifested as early as 1 year after surgery, and, in particular, that the formation of bone bridges (spot welds) in the interface increases in time.
authors.affiliation: Cattedra di Clinica Ortopedica II, Università degli Studi, Milano.
authors.forename: E C
authors.initials: EC
authors.lastname: Marinoni
authors.forename: A
authors.initials: A
authors.lastname: Fontana
authors.forename: S
authors.initials: S
authors.lastname: Castellano
mesh_terms: D000328:Adult; D000368:Aged; D017886:Durapatite; D005260:Female; D005500:Follow-Up Studies; D006622:Hip Prosthesis; D006801:Humans; D008297:Male; D008875:Middle Aged; D015207:Osteoarthritis, Hip / Q000601:surgery; D011474:Prosthesis Design; D013997:Time Factors
chemical_list: D017886:Durapatite