Abstract
The purpose of the present study was to evaluate the bone level in individual sites and the correlation between bone level and age. A total of 47 (94 jaws) contemporary dry Japanese skulls were examined with an average distance between the alveolar bone margin and CEJ within 2.0mm.
The following findings were obtained
1. There was no correlation between average bone level and age.
2. Sites of more than 2.0mm in the bone level were: in maxillary—in the mesio-lingual first molar and facial canine on both sides and in the left mesiofacial first molar. In mandibular right side—in the facial and lingual central incisor and in the facial canine and first premolar. In mandibular left side—in the facial lateral incisor and canine.
3. It was indicated that there might be a special anatomic reason for the large distance between CEJ and alveolar bone margin at maxillary mesio-lingual first molar.
4. No statistical correlation was found between the right and left side in the bone level.
5. There was a correlation between bone level and age in only 13 of 72 sites and no correlation between bone level and age in sites of more than 2.0mm.
