[Intervertebral disc calcification in childhood]. / Az intervertebralis discus kalcifikációja gyermekkorban.

Author describes a case of calcification of the intervertebral disk in a child, observed simultaneously in two segments on the dorsal spine. During a long observation the signs of remission were observed. The case was thought worthy to be published because of the rare occurrence and the problematic differential diagnosis.

The treatment of Perthes' disease.

The results of surgical and conservative treatments of a total of 235 patients with unilateral Legg-Calvé-Perthes disease are reported. Results of the two modes of treatment with those of an untreated patient group are presented. The long periods of follow-up have shown that surgical treatment yielded better results than the weight-relief of the hip by a splint. Following femoral osteotomy, the course of the disease became more rapid. Based on their experiences, authors recommend the surgical treatment of Legg-Calvé-Perthes disease.

Effect of growth zone injury on growth in the tibia of rabbits.

Damaging the ossification centre of the proximal epiphysis of the tibia, the articular disc and the metaphysis of rabbits, the effect of injury on growth and the capacity for tissue regeneration during growth were studied radiologically and histologically. The injury penetrating into the metaphysis, directly damaging the articular disc gave rise to a more serious growth disturbance at the proximal end of the tibia than did the injury localized to the epiphyseal ossification centre. Tissue regeneration resulted in a richly vascularized granulation tissue in the injured region, with subsequent spongy bone formation. The hyaline cartilage did not regenerate.

Degenerative deformations of the acromioclavicular joint in the elderly.

The authors performed radiological and locomotor examinations of the acromioclavicular joint in relatively high numbers of unselected elderly patients. Data are presented on the incidence, distribution by age, localization and clinical symptoms of arthrosis. Finally the gerontological importance of this particular region is stressed.

Results of the Putti-Platt operation for recurrent anterior dislocation of the shoulder.

The results of the follow-up studies of 152 Putti-Platt operations are presented. The procedure, if preceded by correct indication and performed with exact technique, proved successful for the prevention of recurrent anterior dislocation of the shoulder. Eighty-nine % of the operated patients returned to their former jobs even if it was hard physical work. Recurrence of the dislocation was noted only in less than 2% of all cases.

[Polyarthrosis of the hand (author's transl)]. / Die Polyarthrose der Hand.

The polyarthrosis of the hand is a typical disease of the old age. Its banal form is more frequent in women, its erosive type in men. It can be demonstrated not only on the interphalangeal joints but on the metacarpophalangeal joints as well. The degenerative process of the basal-joints of the first ray of the hand is often seen in polyarthrosis. Most frequently diagnostic problems are caused by the erosive arthrosis however first of all polyarthrosis has to be differentiated from the p.c.p.

Effect of diaphyseal injury on the proximal growth zone of the tibia in rabbits.

In 130 growing chinchilla rabbits, the effect of various diaphyseal injuries--periosteal stripping, cortical drilling and fracture--on the growth plate and the metaphysis of the tibia was studied histologically and radiographically and with the aid of 51Cr labelled erythrocytes and the 85Sr isotope. It was found that the disturbed circulation and the venous stasis may have a marked effect on osteogenesis and bone growth but other factors are probably also involved. In the early stage after the injury an increase in the ground substance, widening of the zone of germinative and proliferative cells in the growth plate and a reticular arrangement of the bony trabeculae in the metaphysis were observed. In the late stage, along with a return to normal circulation, normalization of the osteogenesis and bone growth was also found.

Quantitative analysis of the growth of the hip joint. A radiological study.

Growth of the hip joint is described on the basis of annual radiographs taken of the intact hip joints of 50 boys aged between 5-15 years. The ossification centre of the femoral head grows at a faster rate in breadth than in height. The growth rate in breadth of the bony centrum exceeds also that of the proximal metaphysis and, accordingly, in the case of normal ossification, the radio-anatomical condition of these two parts is characteristic of the age of the individual. The osseous acetabulum also grows at a faster rate in breadth than in depth. In the period studied up until the 15th year the width of the "articular space" gradually decreases. The ossification rate in the age group examined manifests--with slower and faster periods--a gradually declining tendency. The changes revealed by the radiographs have been interpreted from the viewpoint of bone development and an analysis is also given of the spatial conditions of ossification.

Purification and phosphate content of slow-twitch human myosin and its possible role in the maintenance of muscle function.

In the present study the phosphate content of a slow-twitch human muscle myosin was investigated and compared with other myosins. It was found that, similar to myosin of the skeletal muscle of the rabbit, the total and labile phosphate content of this human myosin varied depending on the load previously imposed on the muscle. The labile phosphate content thought to be important in the course of contraction ranged between 4 and 8 mol, which might be explained by the different load applied on the preparations in study. These data were compared with those obtained in a fast-twitch human myosin and the changes in its phosphate content appeared to support the hypothesis put forward on the basis of recent studies on slow-twitch myosin.

[Results of orthopedic and radiological investigations on the knee joint of old age patients (author's transl)]. / Idös korúak térdízületén végzett ortopédiai és radiológiai vizsgálatok eredményei.

Orthopedic and radiological investigations were performed on the knee joint of 200 old age patients. The majority of them had no or minute signs, and were free of symptoms. The X-ray characteristics of the degenerative changes of the old age patient's knee joints, and their relationship with the clinical findings are discussed too. The authors point to the relevance of prearthritic conditions in the pathogenesis of those serious osteo-arthritic changes, which become evident in advanced ages.

Effect of denervation on the longitudinal growth of tubular bones.

The effect of sciatic nerve lesion on the longitudinal growth of tubular bones of the affected extremity has been studied in adolescent rabbits. For the observation of circulation in the bones, intravenously injected Sr85Cl2 solution was used. A retardation of longitudinal growth of the tibia and of the femur on the operated side was noted. Radioactivity in the bones of the operated extremity was always lower than on the control side. For the retarded longitudinal growth, a circulatory disturbance may have been responsible.