Surgery; its theory and practice . Diagram of the fragments a few hours aftersimple fracture. The periosteum is tornand ragged, and separated from the bonefor a slight distance above and below thefracture. Blood is extravasated betweenthe fragments, in the medullary canal, andin the periosteum and other soft tissuessurrounding the Diagram of the process of repair in simplefracture. A. Ensheathing callus; B. In-ternal ; c. Permanent callus. Com-mencing ossification of the ensheathingcallus is indicated by the darker shading atthe angle between the periosteum and thebone. jacen
Surgery; its theory and practice . Diagram of the fragments a few hours aftersimple fracture. The periosteum is tornand ragged, and separated from the bonefor a slight distance above and below thefracture. Blood is extravasated betweenthe fragments, in the medullary canal, andin the periosteum and other soft tissuessurrounding the Diagram of the process of repair in simplefracture. A. Ensheathing callus; B. In-ternal ; c. Permanent callus. Com-mencing ossification of the ensheathingcallus is indicated by the darker shading atthe angle between the periosteum and thebone. jacent soft tissues. It is found (i) replacing the periosteum, andextending for some distance around the bone, above and belowthe hne of fracture, forming a spindle-shaped tumor, by whichthe ends of the fragments are surrounded, as it were, with a fer-rule {ensheaihing callus, Fig. 45, a) ; (2) replacing the medullafor some little distance up and down the medullary canal {internalcallus, Fig. 45, b) ; and later (3) between the ends of the frag-ments {pertnanent inlermediate o?- definite callus. Fig. 45, c). Theensheathing callus and internal callus are gradually organized intofibrous tissue, becoming harder and firmer, and in animals, and, insome instances, in children, are converted into cartilage, or fibro-cartilage. The outermost layer
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectsurgery, bookyear1896
