Abstract
In order to clarify the dentiton and occlusion in children, a new three-dimensional measuerement method using numerized data and computer-generated wire frame models are described.
Study casts of three children (1 male,2 females) were examined by means of this three dimentional measurement system. Measurements for all points for each subject were recorded except when teeth were missing. According to the numerized resulting measurements, we were able to analize the width, depth and height of their dentition and occlusion. In addition, the reasulting measurements were used to make three-dimensional computer-generated wire frame models (Profilogram). These Profilograms were useful in revealing the characteristic profile of each subject.
The results for each subject are as follows.
1 ) Case 1 was a boy with normal occlusion. This individual had no specific abnormalities of the denititon or occlusion. His primary moler relationship was termed as that of a flush terminal plane.
2 ) Case 2 was a girl with anterior and posterior cross-bite on the right side. Her overbite was -4.21 mm. Her dental arch form exhibited a left shift of the mandibule. Her posterior occlusion was an Angle Class III malocclusion and she had posterior crossbite on the left side.
3 ) Case 3 was a girl with open bite. In the upper view, the dental arch form was the V-shaped form. Her dentition was characterized by a small distance between the cusps of the primary canine and in maxilla and large overjet (5.65 mm).
Thie usefullness and simplicity of this method make it a potentially valuable tool for quantitative assessment and analysis of the dentition and occlusion in three dimensions.
