Bioceramics. Proceedings of the 4th International Symposium by W. Bonfield, G. W. Hastings and K.E. Tanner (Eds.)

By W. Bonfield, G. W. Hastings and K.E. Tanner (Eds.)

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The basis of the phalanx is osteotomized perpendicularly to the phalangeal Alumina Total Joint Replacement of the First Metatarso-Phalangeal Joint: S. Giannini et al. 43 longitudinal axis. The medullary canal is drilled and reamed by particular devices and the phalangeal prosthetic component is implanted. The metatarsal distal metaphysis is osteotomized 15° anteriorly and distally obliquely to the longitudinal metatarsal axis. Subsequently the metatarsal prosthetic component is implanted. Both the prosthetic components are implanted without bone cement.

9% of the patients showed no clinical degradation of any etiology (fig. 2). FIGURE 2 RADIOLOGICAL RESULT AFTER 10 YEARS EXCELLENT CLINICAL STATUS Ten Year Survivorship of Cemented Ceramic-Ceramic Total Hip Replacement: L. Sedel et al. 31 Roentgenographic analysis 68 patients were evaluated Socket : bone-cement demarcation as well as ceramic-cement demarcation were noticed. 8 average follow-up, the remaining 4 had still good clinical results and were not reoperated. 6%) showed minor changes (calcar résorption less than 5mm (8), or moderate cortical thickning), one femoral component was loosed, and another showed cortical thinning due to endosteal cysts (3%), these two major femoral changes were always associated with a socket migration.

After décalcification, the acetabulum was sectioned vertically and perpendicular to the joint surface, that is related to the loading directions of the pelvis. These sections were stained with hematoxylin-eosin and Mellory's azan for microscopy. Acetabular surface was stained with H-E and A-M and acetabular medullary cavity with H-E for histological examination. The extracted prostheses were examined for roundness and surface roughness to investigate changes in their appearances. RESULTS The animals walked with a quadripedal gait about 2 weeks after the operation.

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