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Sintered Fiber Metal Composites as a Basis for Attachment of Implants to Bone
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From the Department of Orthopaedic Surgery, Abraham Lincoln School of Medicine, and Department of Materials Engineering, University of Chicago, Chicago
1971 by The Journal of Bone and Joint Surgery, Incorporated
J Bone Joint Surg Am, 1971 Jan 01;53(1):101-114
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A fiber titanium composite has been developed and its potential application as a method of skeletal fixation for internal prosthetic devices has been studied.

Titanium fibers, 0.19 millimeter in diameter, were cut in short lengths, compressed in dies to predetermined densities, and sintered under vacuum.

The composite exhibited adequate strength and its compliance was larger than bone.

Samples were implanted in the trochanteric and in the supracondylar areas of the femora of rabbits and dogs. Peripheral bone formation was evident at ten days, bone ingrowth was demonstrated at two weeks, and penetration deep into the samples was seen three weeks following implantation.

The shear strength of the bond at the implant bone interface in the trochanteric region of dogs was measured hs tensile tests. The strength increased significantly until the second week and remained constant thereafter until twelve weeks following implantation. Average values were in the range of 20 kg/cm2.

These findings are discussed in terms of the configuration of a prosthetic device. A fiber metal composite in the form of a thin sleeve surrounding ansd bonded to a central solid metal core would provide fixation to bone and uniform stress distribution at the implant bone interface.

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    These activities have been planned and implemented in accordance with the Essential Areas and policies of the Accreditation Council for Continuing Medical Education (ACCME) through the joint sponsorship of the American Academy of Orthopaedic Surgeons and The Journal of Bone and Joint Surgery, Inc. The American Academy of Orthopaedic Surgeons is accredited by the ACCME to provide continuing medical education for physicians.
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