Abstract
The purpose of this study was to investigate the significant correlations of the traumatic occlusion and the forms of alveolar bone resorption.
The traumatic occlusion was observed on three factors which were Occlusal Contact Area (OCA), Luminosity Grade 1 (LG1..), and position of the premature contact. OCA and LG1.. were measured by IMAGE PC system, and position of the premature contact was marked by articurating paper in the intercuspal position, and the forms of alveolar bone resorption were observed by Shonic-GA system.
The subjects were twenty-one including premolars and molars of mandibular which were shown the premature contact in the intercuspal position.
And the results were as follows.
1. The forms of alveolar bone resorption were processed of image from the standard dental radiogram by using of Shonic-GA system, and the forms were divided into four types on the premolar or five types on the molar.
2. In cases of premolar, the premature contact, OCA and LG1.. were observed on the bone resorption of type I and III. And it was suggested that the traumatic occlusion was connected to the forms of the alveolar bone resorption.
3. In cases of molar, type I and II had a tendency to contact on the near of alveolar bone resorption side, but type III and IV had no connection with the correlation of traumatic occlusion and the forms.
4. The position of premature contact, the maximum OCA and the maximum LG1.. were shown on the same position.
