New experience with alumina-on-alumina ceramic bearings for total hip arthroplasty.
A major challenge for total hip arthroplasty is to minimize wear and osteolysis in young, active patients. Alumina ceramic bearings have shown superior wear resistance and lubrication and do not carry the risk of ion release. In a prospective randomized study, 514 hips were implanted. All patients (average age, 53 years) received the same press-fit hydroxyapatite coated femoral stem; two thirds (345 hips) received alumina ceramic bearings, and one third (169 hips) received a cobalt-chrome-on-polyethylene bearing. At a mean follow-up of 35.2 months (range, 24-48 months), there was no significant difference in clinical performance between the patient cohorts. No ceramic fracture or alumina ceramic bearing failure occurred. This new experience involves the use of improved ceramic materials and new design considerations that eliminate the risks and complications of past experiences with ceramic implants and provides a safe bearing option for young patients.
D'Antonio
James
J
Sewickley Valley Hospital, Sewickley, Pennsylvania, USA. hahip@aol.com
Capello
William
W
Manley
Michael
M
Bierbaum
Benjamin
B
D000537:Aluminum Oxide; D019644:Arthroplasty, Replacement, Hip; D002516:Ceramics; D002857:Chromium; D003035:Cobalt; D005500:Follow-Up Studies; D006622:Hip Prosthesis; D006801:Humans; D008875:Middle Aged; D020959:Polyethylene; D011446:Prospective Studies; D011474:Prosthesis Design; D013997:Time Factors
D002857:Chromium; D003035:Cobalt; D020959:Polyethylene; D000537:Aluminum Oxide