[Wolff's law of transformation after 100 years].

J Hert

Acta Chir Orthop Traumatol Cech. 1990; 57(6):465-476

In the introduction to the article the author briefly describes the history of the Wolff's invention that under the influence of the function the bone structure is restructuring. This functional adaptation however, has not been fully clarified until these days. At present the general scheme of the fundamental adaptation mechanism has been generally adopted according to which the bone responds to the inner strain by aposition of the new bone while inactivity results in resorption. The author's own experiment as well as modern experiments carried out by the Lanyon group have proved that the starting point for reaction is intermittent loading in which...

[Limited arthrodesis of the wrist].

V Frühaufová

Acta Chir Orthop Traumatol Cech. 1990; 57(6):477-488

[Sonographic examination of children's hip joints. Initial experience].

D Ostrý, I Vaněcek

Acta Chir Orthop Traumatol Cech. 1990; 57(6):489-495

The authors present their first experience with sonographic examination of children's hip joints. Between May 1988 and the end of 1989 they examined in total 4000 children's hip joints. They made a group of patients comprising 1500 hip joints in 750 children. The examination was performed by a portable sonographic 5 MHz probe. In the given group there occurred the decrease of the number of pathological x-ray findings in the 3rd month to 6.6 per cent as compared to 14.1 per cent in the control group. The authors explain this decrease by a timely treatment also of clinically negative findings in case of the pathological sonographic finding in the maternity...

[Spondyloepimetaphyseal dysplasia. Case report].

M Matějícek

Acta Chir Orthop Traumatol Cech. 1990; 57(6):496-505

Skeletal dysplasia represents a wide range of congenital diseases diagnosed mostly on the basis of a clinical and x-ray picture, exceptionally on the basis of the finding of biochemical changes of metabolism (e.g. mucopolysaccharidosis). The author presents a clinical and x-ray picture of a skeletal disease in two gypsy children (brother and sister) which differed from any other regularly described congenital bone dysplasia. The mentioned finding most of all resembled a rarely described disease (or rather only theoretically presupposed) in which there occur combined symptoms of spondylo-, epi-, spondylometa- and physeal dysplasia (= spondylo-epimetaphyseal...

[Response to the discussion of "Experience with 3-stage screening for the detection of congenital hip dysplasia"].

J Komprda

Acta Chir Orthop Traumatol Cech. 1990; 57(6):506-507