Abstract
The occlusions of premolars and molars were measured at the intercuspal position of 20 normal natural dentitions (average age: 24.5 years old).
Taking the interocclusal record of the upper and lower molars, a plane figure was constructed by using the “Superposed rubber pattern method”.
It was the method in which the interocclusal record was sliced perpendicularly to the Camper's plane. The sliced patterns were then traced and a plane figure was graphed by superposing each traced figures.
The whole area in the unilateral lower four molars, the five different areas divided the intraocclusal distance, and the intraocclusal cubic volumes were measured, respectively.
The results were as follows:
1. In the whole area the average value was 318.31 mm2.
2. The average values were 136.47 mm2, 57.02 mm2, 50.12 mm2, and 74.72 mm2 in each of the areas of the intraocclusal distance over 2.0 mm, the from 2.0 mm to 1. 0 mm, the from 1.0mm to 0.5 mm, and the under 0.5mm, respectively.
3. The average value was 21.44 mm2 in the area of the intraocclusal distance under 0.05 mm.
4. The intraocclusal cubic volume was measured by applying the Simpson's rule. The average value was 289.78 mm3.
