Abstract
As to the treatment of periosteal callus in the fracture, out of clinical cases 50 ones administered non-bloody and bloody operation respectively, totalling 100 ones, were chosen and mainly observed from the roentgenographical point of view in the Ist Section, while calluses formed in the periosteum conser ved region and the periosteum removed region of experimental fracture in mature rabbits were observed by the microradiography in the 2 nd Section. Results thus obtained are as follows.
(1)Cases administered non-bloody treatment have not only a better periosteal callus formed from the roentgenographical standpoint, but also cause the union of fracture at earlier date than those administered bloody treatment.
(2)The periosteal callus is greatly influenced by the detachment, laceration and crush of periosteum owing to the primary and secondary injury. In other words, the callus is unlikely to be formed in cases presumed to be remarkably injured in the periosteum in view of the dislocation, or in regions given operative impetuses. In these cases the reduction in the reproductivity of periosteum owing to the periosteal injury is presumed to be responsible for delay of the therapy.
(3)The experiment demonstrates that the callus is formed more quickly and more quantitatively in the periosteum conserved region than in the periosteum removed region.
(4)The more approximate to the normal periosteum as well as to the detached and swollen periosteum a new bone is, the more compact it becomes and the more distribution of salt of lime it contains, thereby suggesting the reproductivity of periosteum.
(5)The progress of calcification is concluded from the increase in salt of lime in the callus, and indicates clearly the weekly course of osteogenesis.
(6)The salt of lime is also distributed in the cartilage layer of callus.
(7)It ensues that the recovery of fracture in juveniles is recognized to coincide with the period of its union indicated by Gurlt, but in adults requires 1.5-3 times the period.
