title: Radiographic evaluation of HDPE cemented and cementless Lord and An.C.A. screwed acetabular models.
abstract: A total of 187 alumina screwed porous-ceramic coated sockets (An.C.A.), 48 screwed smooth-surfaced Lord sockets, and 251 cemented polyethylene sockets were radiographically evaluated at an average follow-up of 30, 51 and 96 months respectively. After 6 years the Lord prostheses revealed a 38% incidence of loosening, similar to that observed for cemented sockets 10-12 years after surgery. The An.C.A. prostheses revealed radiographic loosening equal to 12% (6 cases) in the first 50 implants, and only 0.7% in the remaining 137 cases: overall, the An.C.A. acetabular prosthesis revealed an index of radiographic loosening equal to 3.3% (7/187). To guarantee "osteointegration" of the porous coating of An.C.A. sockets optimal stability must be obtained when the prosthesis is screwed in. Because the mid-term follow-up for this clinical experience is relatively short (30 months), an opinion on the reliability of the screwed "porous" sockets must await confirmation.
authors.affiliation: Clinica Ortopedica dell'Università di Bologna.
authors.forename: A
authors.initials: A
authors.lastname: Toni
authors.forename: A
authors.initials: A
authors.lastname: Sudanese
authors.forename: M
authors.initials: M
authors.lastname: Viceconti
authors.forename: P P
authors.initials: PP
authors.lastname: Montina
authors.forename: D
authors.initials: D
authors.lastname: Ciaroni
authors.forename: F
authors.initials: F
authors.lastname: Calista
authors.forename: S
authors.initials: S
authors.lastname: Terzi
authors.forename: A
authors.initials: A
authors.lastname: Giunti
mesh_terms: D000077:Acetabulum; D000328:Adult; D000368:Aged; D001843:Bone Cements; D001863:Bone Screws / Q000706:statistics & numerical data; D005500:Follow-Up Studies; D006621:Hip Joint / Q000000981:diagnostic imaging*; D006622:Hip Prosthesis / Q000706:statistics & numerical data; D006801:Humans; D008875:Middle Aged; D011474:Prosthesis Design / Q000706:statistics & numerical data; D011475:Prosthesis Failure; D011859:Radiography
chemical_list: D001843:Bone Cements