title: [Radiographic study of bone resorption at the proximal end of the femur after total hip replacements].
abstract: Radiography following cemented total hip replacement (THR) often revealed progressive bone resorption at the proximal end of the femur. The purpose of this study is to clarify the relation between this bone resorption and loosening of the acetabular component. The radiographic analysis was done using radiographs of two hundred and ninety-nine Müller type THR for osteoarthritis with minimum five years follow-up at regular intervals. The bone resorption at the proximal end of the femur appeared frequently in cases of loosened acetabular component. As acetabular loosening progressed, the bone resorption increased accordingly. Further study revealed that incidences of loosened acetabular component were statistically higher in cases of progressive bone resorption than in cases of non-progressive, 5.2 years after operation. This study indicates that progressive bone resorption might be a histological reaction caused by debris of pulverized bone cement generated by loosening acetabular component. The degree to which bone resorption progresses, therefore, directly reflects the amount of loosening of the acetabular component and should be a indicator for surgery to reconstruct loosened acetabular component.
authors.affiliation: Department of Orthopaedic Surgery, Nagoya National Hospital, Aichi.
authors.forename: N
authors.initials: N
authors.lastname: Miyake
mesh_terms: D000077:Acetabulum / Q000473:pathology; D000368:Aged; D001172:Arthritis, Rheumatoid / Q000601:surgery; D001862:Bone Resorption / Q000000981:diagnostic imaging* / Q000209:etiology / Q000473:pathology; D005260:Female; D005269:Femur / Q000000981:diagnostic imaging* / Q000473:pathology; D005500:Follow-Up Studies; D006622:Hip Prosthesis; D006801:Humans; D007592:Joint Diseases / Q000601:surgery; D007594:Joint Loose Bodies / Q000473:pathology; D008297:Male; D008875:Middle Aged; D011859:Radiography