[Long-term post-treatment observation of a case with orthodontic treatment using occipito-mental anchorage only].

Occipito-mental anchorage (OMA) was used in a skeletal class III case with maxillary retrognathism. Long term observation of the patient post treatment revealed the following: 1. The facial profile was improved gradually until the end of treatment: but by 5 years after treatment, it had become slightly worse. 2. Improvement was seen in the maxillomandible relationship owing to the continuous slight advancement of the maxilla and the inhibition of the advancement of the mandible. And this relationship also showed long-term stability after treatment. Hardly any rotation of the mandible was found during the treatment. But clockwise rotation of the palatal plane during treatment and counterclockwise rotation after treatment were observed. 3. Regarding dental changes, labial inclination of upper incisors and lingual inclination of lower incisors owing to the improvement of overjet were seen during treatment. But they reverted to almost the same inclinations seen at the first examination by 5 years after treatment.