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The Ultrasound technique as an image producing procedure for fractures of the mandibular collum is outlined with physical theory and clinical examples. Advantages and disadvantages are compared and it is stated that a part of all patients with fractures might have a benefit from this method. Mentally handicapped patients, pregnant women and all sorts of fidgety patients will profit by the ultrasound investigation as the only way to ascertain the bone-fracture. There is necessity to relate the sonogram to a conventional X-ray picture whenever it is possible, for the procedure is suited to prove the fracture, not to exclude it.

Closure and dressing techniques in wound treatment after surgical removal of the mandibular third molars were compared. Large abscesses were found after third molar removal in 8 percent. An extraoral incision was made in 58 percent of these cases. On the other side, in a group of 1189 third molar removals treated by a gauze strip no abscess was observed. In a further investigation the subjective disturbance of patients treated with a dressed gauze were the slightest. Also, the dressing technique in the treatment after third molar removal could decrease the number of postoperative infections.