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A survey is given of patients with odontogenic keratocysts in childhood and adolescence which were treated at the Clinic for Maxillofacial Surgery Tübingen in the last 10 years. Odontogenic keratocysts occurring in the growth period are treated in most cases by enucleation or partial marsupialization. To avoid damaging the nerve or dental germs, fixation with Carnoy's solution is not performed. In a second part an experimental study dealing with the effects of Carnoy's solution on peripheral nerves is presented. After incubating the sciatic nerve of rats with Carnoy's solution lumbar SEP, M-response and Hoffmann's reflex were recorded. It was possible to demonstrate the detrimental effect of Carnoy's solution on peripheral nerves. After incubation periods of more than 2 minutes almost complete functional loss was observed. There was a strong correlation between electrophysiological and histological findings.

It is reported on a family in which diseases of the jaws in considerable conformity were observed over four generations. The diagnosis of the latest case (keratocyst) has been verified. In the paper some peculiar characteristics are pointed out and the question of heredity is discussed.

Operative procedures were carried out on 410 maxillary sinuses in 397 patients. The most frequent indications for surgery were communication between the mouth and the atrium (55.4%) and cysts (24.2%). A Caldwell-Luc operation was carried out in 76.6% of the cases (radical operation). Vestibulum-cheek flaps were used to close the fistula in 97% of the cases. A follow-up examination of 220 patients showed that 10.2% complained of pain. The indications for surgery were limited to avoid this lasting damage.

The good results were confirmed in a follow-up examination of 23 patients two to six months after surgery. No signs of disturbed wound healing and/or inadequate organization of the clot could be observed catamnestically, clinically, and roentgenologically. The late infections often observed after implantation of Gelastypt S (with Surfen) did not develop after use of Gelastypt M 1/2. This preparation therefore may be recommended without restriction.