BONE REPAIR FOLLOWING DEFECTS MADE IN THE SKULL OF CATS BY MEANS OF DIFFERENT INSTRUMENTS

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Abstract
Otologists have shown an ever increasing interest in examining the fundamental morphologic response which occurs in bone after injury by the use of various instruments. More and more clinicians are going back to the laboratory to test the hypotheses which direct their efforts in dealing with the difficult problem of otosclerosis. Recently, for example, attempts have been made to determine the histologic changes which take place in injury of the periosteal bone by different instruments. Canfield1made defects with sharp and dull instruments in the skull of the cat, and his observations on 2 week old specimens led him to state: The defect cut with the sharp saw was partially filled with fibrous tissue, with many osteoblasts producing new bone. The defect made with dull drill showed, however, almost no fibrous tissue, no new bone and almost no osteoblasts. Sections of the defects made with a sharp cutting burr

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