Description: Segment 1 The intertitles give the patient's history. The teeth used to be very irregular but have recently been regulated. A cast is shown of the teeth before treatment. The gums are currently inflamed and hypertrophied. An x-ray of the teeth is shown. The findings of a bacteriological smear are shown. The patient is prepared for the operation and anaesthetised. Time start: 00:00:00:00 Time end: 00:05:01:20 Length: 00:05:01:20 Segment 2 The instruments to be used are shown to the camera. Incisions are made in the gums and along the length of the teeth in the mouth. The pieces of gum from between the teeth are removed. The incised portion of gum is removed. Time start: 00:05:01:20 Time end: 00:09:58:00 Length: 00:04:45:05 Segment 3 The cut edges of the gum are cauterised. The upper jaw is now operated on as before. The piece of removed gum from the upper jaw is shown to the camera. Time start: 00:09:58:00 Time end: 00:15:22:00 Length: 00:05:24:00 Segment 4 Any remaining loose tags of gum are trimmed. The instruments used are shown to the camera. The tips of the teeth are ground down to shorten them. The teeth are packed with medicated wax. The teeth are shown one month after the operation. The female patient is seen, smiling and talking. Time start: 00:15:22:00 Time end: 00:20:05:15 Length: 00:04:43:15