title: Cementless acetabular fixation in total hip arthroplasty using polyglycolide-lactide screws: an in vivo canine study.
abstract: Bone ingrowth into cementless acetabular components was evaluated in a canine total hip arthroplasty model, comparing components initially stabilized with polyglycolide-lactide screws with those initially stabilized with titanium screws. The acetabular shell was anchored with 2 polyglycolide-lactide screws in 16 dogs and with 2 titanium screws in 12 dogs. The dogs were followed and sacrificed at 7 weeks, 14 weeks, 10 months, or 15 months. Histomorphometric analysis of bone ingrowth into the weight-bearing dome of the acetabular shell was conducted. No difference was detected in mean bone ingrowth into the acetabular shell comparing the 2 screw groups. The results of this study do not support a significant advantage to the use of biodegradable screws for the initial stabilization of cementless acetabular components in canine total hip arthroplasty.
authors.affiliation: Division of Orthopaedic Surgery, Toronto Hospital, Western Division, Ontario, Canada.
authors.forename: A J
authors.initials: AJ
authors.lastname: Yee
authors.forename: K
authors.initials: K
authors.lastname: Protzner
authors.forename: V L
authors.initials: VL
authors.lastname: Fornasier
authors.forename: A G
authors.initials: AG
authors.lastname: Binnington
authors.forename: E
authors.initials: E
authors.lastname: Bogoch
authors.forename: J R
authors.initials: JR
authors.lastname: Davey
mesh_terms: D000077:Acetabulum / Q000033:anatomy & histology / Q000000981:diagnostic imaging; D000818:Animals; D019644:Arthroplasty, Replacement, Hip / Q000379:methods*; D001696:Biomechanical Phenomena; D001863:Bone Screws; D004285:Dogs; D006622:Hip Prosthesis; D016348:Osseointegration; D011474:Prosthesis Design; D011859:Radiography; D014025:Titanium
chemical_list: D014025:Titanium