NINE PLATES (FOURTEEN FIGURES)
THE OBJECTThe object of paper is the presentation of evidence which supports the ,ollr)wiiig findings, namely :1. That, under the adequate mechanical conditions produced by an intact, normally mobile knee-joint and its related soft parts, patellar cartilage and bone will regenerate from young connective-tissue cells which had not been destined as specific formers of bone.2. That, where the adequate mechanical conditions are altered by means of immobilizing the knee-joint, with the patella left intact, patellar cartilage and bone will atrophy.3. That, mhere the patella is excised in toto and the adequate mechanical conditions are altered by means of kneejoint fixation, patellar cartilage and bone will not regenerate, even with the tendon of the quadriceps extensor femoris muscle and the patellar ligament united by suture.
The advantages of ivory plates in transverse fractures are; they fit closely into the fragments; do not loosen up; they are strong enough to withstand any pull made by muscles attached to the fragments; they will not allow angulation, especially if put in at right angles to the greatest tendency of displacement, or, better, at right angles to the greatest pull of the muacles, they will be gradually absorbed, and never act as a foreign body in the bone.4137 South Ualsted Street.ABSTRACT OK DISCUSSION DR. F. J. Cotton, Boston : The first of those plates did not show an osteoblastic absorption, hut, rather, a granulation absorption.Db. Paul B. Maonuson, Chicago: This plate was practically translucent when I took it out. In six weeks it had softened so much from the absorption of fluids and become tightened into the bone so firmly that it was difficult to get it out. It is eroded at both ends, but little in Pig, 8.-Fracture of both bones of the leg.1« lg. 9.-Same as Fig. 8, one day after operation. Ivory plate In tibia. Peg« seen as faint shadows on each side of fracture.the middle, at the seat of the fracture. It was just outside the seat of fracture that the greatest erosion took place. Dr. D. B. I'm:mister, Chicago: Most of the osteoclusts producing absorption of dead bone or ivory are not giant cells, but the ordinary fibroblasta. In my histologie work I have observed extensive lacunar absorption where giant cells were entirely absent.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.