[Free bone transplant as mandibular substitute with special reference to chin reconstruction].
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Biomedical subjects
Publications and source records attributed to A Rehrmann.
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A concept for repair of double clefts is described. In the primary operations at the age of six months on the first side, and six weeks later on the other, it is important to supply the prolabial mucosa by muscular vermilion flaps from the lateral sides, crossing the midline. Thus a muscular ring in the vermilion is obtained. At the age of 3-4 years both remaining muscular halves of the lip are united. This is achieved togeather with lengthening of the columella, using broadened prolabium to a natural looking philtrum. Lips repaired this way are satisfying with regard to both appearance and function.
Long-term results in 23 cases with condylar fractures are presented. The method of treatment consisted in forward extension of the mandible by means of a long rubber bridle stretched between a steel hook at the chin and a strong sagittal wave-like, bent wire incorporated in a head cap. Strength and direction of the bridle can be modified. It provieds perfect repositioning of the mandible and a normal occlusion within some hours. The idea of this functional method is to eliminate the displacing muscular pull and dorsally-directed deviation of the mandible, and to restore muscular balance even with full range of mouth-opening. The distraction of the mandible from the glenoid fossa creates space and enables the dislocated condyles to upright themselves spontaneously. In cases of intracapsular or subcondylar fracture the active movements of the mandible, under the conditions of equilibrium, lead to a remodelling of the damaged condylar heads to a new form, induced by function. Ankylosis is avoided with certainty. Mandibular splinting or osteosynthesis are needed only in concomitant fractures of the rest of the mandible. The temporo-mandibular joint area and the rest of the mandible are considered to be independant entities in the treatment of condylar fractures. The method described is simple. Full mandibular mobility was obtained in all cases and spontaneous uprighting of dislocated condyles observed. There was no need for subsequent opening exercises.
Pedicled skin flaps of 22 patients which had been exposed for many years to the environment of the oral cavity were examined clinically and histologically. The results permit statements to be made on the nature of the changes which occur on the surface, and in the histological picture of the graft. The superficial skin changes, as well as the typical histological structures of the external skin are shown in the micro-photographs presented, to be still preserved after many years.
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