[Plastic deformity of the long tubular bones].

This paper presents a special reaction of long tubular bone to a singular compression or bending stress. The reaction is defined as "plastic deformation". The characteristics of this reaction are permanent bowing of a long tubular bone without fracture and the lack of periosteal reactions in follow-up roentgenograms. In the forearm the deformation leads to loss of function, in the tibia and femur a lasting deformation may lead to late arthrosis of the adjacent joints, therefore it should be corrected. Experiences in eight own patients and bibliographical data are discussed.