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THE REPAIR OF EXPERIMENTAL DEFECTS IN RABBIT SKULLS

M. H. Young 1

1 The Departtnent of Pathology, University of Sheffield

1. Experimental defects in the cranial vaults of young adult rabbits were implanted with decalcified, deproteinised and deep frozen homogenous whole bone. The experiments were similar to those of Ray and Holloway (1957) except that these workers used rats as the experimental animals. In addition, six control defects were made and not implanted.

2. All animals were killed six weeks after operation and thirty-four defects were studied by radiology and by histology.

3. All implants became surrounded by connective tissue and in all cases some new bone formed in apposition to implanted fragments. The degree of incorporation of the implants in new bone varied widely, not only between the three implanted groups, but also within each group. In general, new bone formation was greatest in defects implanted with deproteinised and whole bone, least in defects implanted with decalcified bone.

4. The fate of bone implants and the extent to which they can be said to induce osteogenesis are discussed.
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Hip, Knee, Trauma, Upper limb, Foot & Ankle, Paediatrics, Oncology, Spine, Arthroplasty, General