Comparison of Autogenous Cortical Graft and Demineralized Allogenic Bone Matrix (DABM) in the Fixation of Segmental Prosthesis
Numerous options are available today to reconstruct large bony defects after tumor resection, failed total joint arthroplasty, or trauma. Custom-designed segmental bone and joint implants  are being used widely, but the conventional prosthetic fixation method may lead to stem loosening or fracture after prolonged in vivo utilization. Since these late complications are mainly attributed to failure of the bone cement , biological fixation. using porous implants has been advocated. Porous coating applied to the stems to achieve biological fixation of segmental prostheses has several disadvantages which may predispose the implants to stem fracture or cause bone resorption. A new concept of prosthetic fixation through extracortical bone bridging and growth over the porous-coated segmental portion of the implant has been introduced [4–6]. Morselized corticocancellous autogenous bone grafts are applied over the porous-coated segment and adjacent to cortex to induce bone formation. The stems of these implants are solid and are cemented to achieve initial implant stability.
KeywordsTitanium Porosity Torque Tetracycline Eosin
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