Compliant prestress fixation in tumor prostheses: interface retrieval data.
This article reports the first available human retrieval data following the use of a new fixation system for tumor prostheses. The compliant prestress (CPS) fixation system obviates the need for long intramedullary stems. The CPS was designed to provide a stable, high-pressure, motion-free bone-implant interface that would prevent aseptic loosening and allow osseointegration at the bone-implant interface. At 10 months, the fourth patient in the human trial required amputation. Backscatter electron microscopy revealed a buttress of new bone had formed along 70% of the bone-metal interface, with excellent bony ingrowth (average: 42%) into the transverse, porous-coated titanium interface.
Bini
S A
SA
Kaiser Permanente Medical Center, Redwood City, Calif, USA.
Johnston
J O
JO
Martin
D L
DL
D000293:Adolescent; D000671:Amputation, Surgical; D005266:Femoral Neoplasms / Q000188:drug therapy / Q000473:pathology* / Q000601:surgery*; D005269:Femur / Q000473:pathology; D006801:Humans; D008297:Male; D009364:Neoplasm Recurrence, Local / Q000473:pathology / Q000601:surgery*; D016348:Osseointegration; D012516:Osteosarcoma / Q000188:drug therapy / Q000473:pathology* / Q000601:surgery*; D011474:Prosthesis Design; D019919:Prosthesis Implantation / Q000295:instrumentation* / Q000379:methods; D016879:Salvage Therapy / Q000379:methods*