. A radiographic atlas of the pathologic changes of bones and joints . nts (Plate L). As a result of the changes which take place in the basementmembrane and in the cartilages, the latter become destroyed frompressure during the movements of the joint and the bone is laidbare. This is shown in the skiagraph by disappearance of thenormal articular shadow (Plate LI). The ends of the bones are much deformed. They are flattenedand made broader by irregular new growth of bone, while at thesame time they atrophy. The new growth of bone starts from thearticular cartilage. 142 — PLATE L. RHEUMATOID AR
. A radiographic atlas of the pathologic changes of bones and joints . nts (Plate L). As a result of the changes which take place in the basementmembrane and in the cartilages, the latter become destroyed frompressure during the movements of the joint and the bone is laidbare. This is shown in the skiagraph by disappearance of thenormal articular shadow (Plate LI). The ends of the bones are much deformed. They are flattenedand made broader by irregular new growth of bone, while at thesame time they atrophy. The new growth of bone starts from thearticular cartilage. 142 — PLATE L. RHEUMATOID ARTHRITIS OP THE WRIST—IIYPERTROrHIC TYPE. There is a marked deformity of the wrist. The articular cartilage of the radius is destrojed. The normal inter-articular shadows are absent. The carpal bones can-not be made out from each other, and they can barely be separated fromthe radius and ulna above and the metacarpal bones below. New growth formations, starting from the margins of the articularcartilages of the radius and ulna and from the ligaments, can be PLATE L. — 144 PLATE LI. RHEUMATOID ARTHKITIS OF THE KNEE—ATROPHIC TYPE, The inter-articular sliadow in tlic external half of the joint is darkerthan normal. In the inner half the absence of the inter-articular clear shadow indi-cates the almost complete destruction and disappearance of the articularcartilage.
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Keywords: ., bo, bookcentury1900, bookdecade1910, bookidradiographicatla00gran
