[Idiopathic femur head necrosis in the adult--relation to clinical and pathologic-anatomic findings].

For the research here presented, a total of 15 femoral heads with idiopathic necrosis in 15 patients, ranging in the age from 28 to 59 years, were available. In 7 of the histologically examined, in the occasion of endoprosthetic obtained femoral heads, a singular necrosis was to be discovered. In 6 items two attacks of necrosis, in 2 even three attacks could be confined.

[Epiphyseolysis of the hip joint and prearthrosis (author's transl)].

The question whether disturbances of hormonal regulation influence the development of the hip joint, is examined on the basis of roentgenographs in 25 patients with epiphyseolysis. We can conclude from the numerous collected data that gross anatomy (especially the harmonic development between head and acetabulum) is largely normal. A change of the abductor angle of Debrunner in the sense of a reduction may exercise an unfavorable influence on the load which the entire hip joint has to bear (due to reduction of the lever arm of the musculature with an abductor effect).

[Insertion of Judet's prosthesis in high-region dislocation of the hip (author's transl)].

Osteoarthrosis of the hip (also known as coxarthrosis) as a result of a high-region dislocation of the hip, presents a difficult task for the orthopaedic surgeon, the solution of which is still under frequent and intense discussion. Total hip replacemnt (hip endoprosthesis) involves technical difficulties which result on the one hand, from the underdeveloped anatomic conditions (underdeveloped primary acetabulum with soft spongiosa on valgus position of the highly sclerosed secondary acetabulum associated with underdeveloped shaft of the femur); on the other hand, a repositioning is difficult if anchoring of the prosthesis is effected at the level of the primary acetabulum. For this reason, we developed an original operation method requiring two sessions: in a first operation, an extended arthrolysis is performed via an anterior access, whereas at the same time an extension is carried out by means of the distraction apparatus according to Wagner.