Severe wear from retrieved alumina-on-alumina coupled implant: a case report.
This study details the in vivo wear behavior of an alumina acetabular cup and a femoral head on a retrieved non-cemented hip prosthesis. A commercial alumina ceramic-on-ceramic prosthesis was retrieved from a patient previously treated for bilateral hip arthrosis in "coxa profunda". Massive wear was found on the retrieved alumina ceramic head and acetabular cup. The total measured penetration depth was 1.9 mm while the total calculated weight loss for the acetabular cup was 6.06 g. The study underlines the head-cup instability caused by cup loosening as major cause of severe ceramic wear.
Affatato
S
S
Laboratorio di Tecnologia Medica, Istituti Ortopedici Rizzoli, Bologna, Italy. affatato@tecno.ior.it
Sudanese
A
A
Brizio
L
L
Squarzoni
S
S
Toni
A
A
D000537:Aluminum Oxide; D001672:Biocompatible Materials; D006622:Hip Prosthesis; D006801:Humans; D008297:Male; D008875:Middle Aged; D015207:Osteoarthritis, Hip / Q000601:surgery; D019736:Prostheses and Implants; D011475:Prosthesis Failure
D001672:Biocompatible Materials; D000537:Aluminum Oxide