EFFECT OF PROXIMALLY AND FULLY POROUS-COATED CANINE HIP STEM DESIGN ON BONE MODELING.

J. D. Bobyn, R. M. Pilliar, A. G. Binnington, John Szivek

Research output: Contribution to journalArticle

72 Citations (Scopus)

Abstract

Porous coated canine femoral hip replacement implants were evaluated for biological fixation by bone ingrowth and the effect of the extent of porous coating on bone modeling. The Co-Cr alloy implants were either fully porous coated or coated only on the proximal 40% of the stem. Two implants of each type were studied 9, 16, and 36 months after surgery. Implant fixation and bone modeling were assessed radiographically throughout the implant periods and histologically after the test animals were killed. All 12 implants appeared stably fixed within the femur and were bone-ingrown in the porous region. Radiographic features such as proximal medial and anterior cortical thinning, proximal cancellous bone hypertrophy, and new endosteal bone formation near the stem tip were noted within the first postoperative year, with no appreciable change thereafter. These results indicate that the proximally porous-coated implant design causes increased proximal stress transfer, but this does not necessarily preclude proximal cortical resorption.

Original languageEnglish (US)
Pages (from-to)393-408
Number of pages16
JournalJournal of Orthopaedic Research
Volume5
Issue number3
StatePublished - Sep 1987
Externally publishedYes

Fingerprint

Scanning Transmission Electron Microscopy
Canidae
Hip
Bone and Bones
Hyperostosis
Thigh
Osteogenesis
Femur

ASJC Scopus subject areas

  • Orthopedics and Sports Medicine

Cite this

EFFECT OF PROXIMALLY AND FULLY POROUS-COATED CANINE HIP STEM DESIGN ON BONE MODELING. / Bobyn, J. D.; Pilliar, R. M.; Binnington, A. G.; Szivek, John.

In: Journal of Orthopaedic Research, Vol. 5, No. 3, 09.1987, p. 393-408.

Research output: Contribution to journalArticle

Bobyn, J. D. ; Pilliar, R. M. ; Binnington, A. G. ; Szivek, John. / EFFECT OF PROXIMALLY AND FULLY POROUS-COATED CANINE HIP STEM DESIGN ON BONE MODELING. In: Journal of Orthopaedic Research. 1987 ; Vol. 5, No. 3. pp. 393-408.
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