Radiographic evaluation of HDPE cemented and cementless Lord and An.C.A. screwed acetabular models.
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.
Toni
A
A
Clinica Ortopedica dell'Università di Bologna.
Sudanese
A
A
Viceconti
M
M
Montina
P P
PP
Ciaroni
D
D
Calista
F
F
Terzi
S
S
Giunti
A
A
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
D001843:Bone Cements