Hans K. Uhthoff

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To elucidate the pathogenesis of calcifying tendinitis, clinical and morphological investigations were done on 46 surgically treated cases. Contrary to the prevalent concept of degeneration preceding dystrophic calcification, we found no evidence for an active or a healed degenerative process. The affected tendon was transformed into fibrocartilage with a(More)
We describe a new method for the accurate measurement of the angle of anteversion of an acetabular cup from standard anteroposterior radiographs, and provide the conversion tables required. The effect of the centering of the radiograph is discussed and a method of distinguishing between anteversion and retroversion by using a caudally directed x-ray beam is(More)
We report a clinicopathological study of 90 patients who had calcifying tendinitis, and propose a rationale for its treatment based upon pathogenetic mechanisms. Pain, the cardinal symptom of calcifying tendinitis, is probably subclinical before and during calcification, when tissue hypoxia is primarily responsible for the structural alterations. The pain(More)
OBJECTIVES To test the hypotheses that contractures progress at different rates in relation to the time after immobilization, that immobilization in flexion leads to loss of extension range of motion, and that joints of sham-operated animals are better controls than the contralateral joint of experimental animals. STUDY DESIGN Experimental, controlled(More)
Changes of the coracoacromial ligament (CAL) at its insertion into the undersurface of the acromion were studied radiologically and histologically in 76 autopsy specimens. Two changes were noted: (1) a downward, bony projection of the acromion, an anatomic variant limited to the area covered by the CAL, which might reduce the height of the subacromial(More)
Calcifying tendinitis of the shoulder was studied in 57 patients before and after surgical removal of the calcified material. Many patients with an acute flare of pain prior to surgery also had a "fluffy" calcific deposit on radiograph and histologic evidence of calcium resorption. Conversely, patients with no acute preoperative symptom flare were more(More)
Metaphyseal fractures having different degrees of stability were produced in rats, rabbits, and dogs. The progress of healing various radiologic patterns, observed by correlated roentgenographic and histologic observations, show that the appearance on radiographs of one or two broad, ill-defined bands of increased density indicates a normal healing process.(More)
Metal plates for internal fixation of fractures have been used for more than 100 years. Although initial shortcomings such as corrosion and insufficient strength have been overcome, more recent designs have not solved all problems. Further research is needed to develop a plate that accelerates fracture healing while not interfering with bone physiology. The(More)