Is it advantageous to strengthen the cement-metal interface and use a collar for cemented femoral components of total hip replacements?
The mechanism of initiation of loosening of cemented femoral components is now known. It is debonding at the cement-metal interface. Current data strongly support the concept that a collar and improvement of the cement-metal interface are valuable. Precoating and having a roughened surface proximally and distally on the stem contribute to extended longevity of the cement-metal interface. Using contemporary instrumentation, collar-calcar contact can be achieved regularly and, once achieved, is well maintained for years.
Harris
W H
WH
Orthopaedic Biomechanics Laboratory, Massachusetts General Hospital, Boston 02114.
D001178:Arthroplasty / Q000379:methods; D001696:Biomechanical Phenomena; D001843:Bone Cements; D005269:Femur / Q000601:surgery; D006622:Hip Prosthesis; D006801:Humans; D011475:Prosthesis Failure
D001843:Bone Cements