Identifier: lecturesonortho00ridl (find matches)
Title: Lectures on orthopedic surgery
Year: 1899 (1890s)
Authors: Ridlon, John, 1852-1936 Thomas, Hugh Owen, 1834-1891 Jones, Robert, joint author
Subjects: Orthopedics
Publisher: Philadelphia, E. Stern & Co., Inc.
Contributing Library: The Library of Congress
Digitizing Sponsor: The Library of Congress

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dolescent and the infantile forms may beseen in the Rontgen pictures of these two deformities.Adolescent knockknees do not show the peculiarities-equally well. The deformity seems to begin in theupper end of the tibia, but as soon as any deformityhas developed the line of gravity falls too far to theouter side of the joint, the inner lateral ligamentsstretch, the line of gravity goes farther out, weight i&carried on the outer femoral condyle and its growth isretarded while the inner condyle relieved from weight-bearing grows abnormally long. Similar changes takeplace in the articular surface of the tibia. Coxa varaconsists of a change in the relation of the head of thefemur to the shaft of that bone. The head graduallysinks to or below the level of the greater trochanterand nearer to the shaft of the bone. In some cases thefemoral neck seems to bend, while in others it seemsto actually disappear to a very considerable extent andthe globular head may appear to lie against the inner
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282 surface of the upper end of the shaft of the bone. Attimes the trochanteric region appears thickened. Theprocess is usually a gradual one and is unaccompaniedwith pain or any special sensitiveness. The main characteristics of this so-called adolescentrickets are: The condition appears somewhat laterthan the usual period of infantile rickets, and in chil-

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