. Orthopaedic surgery for students and general practitioners : preliminary considerations and diseases of the spine : 114 original illustrations. pathological function. Or we could expressit that, pathological function produces a physiological bonetransformation to meet new static demands. The great value of Wolffs research is borne out conclu-sively by anatomical and pathological findings, and theauthor has deemed it of sufficient importance to go intothe subject thus briefly to correct in the minds of hisreaders preconceived ideas of the older theory of atrophyand hypertrophy in bone accordi
. Orthopaedic surgery for students and general practitioners : preliminary considerations and diseases of the spine : 114 original illustrations. pathological function. Or we could expressit that, pathological function produces a physiological bonetransformation to meet new static demands. The great value of Wolffs research is borne out conclu-sively by anatomical and pathological findings, and theauthor has deemed it of sufficient importance to go intothe subject thus briefly to correct in the minds of hisreaders preconceived ideas of the older theory of atrophyand hypertrophy in bone according to the Volkmann-Huetertheory. Viewing the example cited of knock-knees from Wolffsstandpoint, it will be found on section that instead of anatrophy of the external condyle there has been a bonetransformation and condensation or osteosclerosis and theinternal condyle has not hypertrophied, but undergone anosteoporosis, as the greater strength and weight-bearing insuch a case falls on the outer side of the bone. In fact, thecortex above and below the knee will be found thicker onthe outer side, to withstand greater strain, than the Fig. 22. K\ock-Knee is especially called to the thickened cortex on the concave side of tli bones. 66 ORTHOPEDIC SURGERY. whereas we know that in the normal bones the cortex isapproximately equal on the external and medial sides in atransverse section. (Fig. 22.) One so often hears explanations advanced, chiefly byparents, as to why a child is bandy-legged, on the groundthat the child is so heavy; one is therefore apt to fall intothe error that the superincumbent weight is entirely respon-sible for the deformity and not the physiological bone trans-formation to meet faulty or pathological static habits. Wolffs law is most important of application in thetreatment of various orthopaedic affections and especiallyin the post-operative treatment of them, to allow sufficienttime to elapse for this bone transformation in the directi
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