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  • Title: [A quantitative study of the ranges of mandibular movement in normal subjects with the digital sirognathograph (D-SGG)].
    Author: Li GZ.
    Journal: Zhonghua Kou Qiang Yi Xue Za Zhi; 1993 May; 28(3):140-2, 190. PubMed ID: 8275803.
    Abstract:
    This paper is to study the mandibular border movement showing in three different direction observations, mandibular tapping movement showing in two different direction observations and the mandibular movement of two types of foods by using D-SGG which is an accurate and convenient measurement system of mandibular movement tracks. The results are as follows: 1. a normal ranges of the mandibular border movement are made and the variations of the ranges are quite small in normal subjects, no significant difference is found. 2. the variations of mouth opening are greater in tapping movement than in border movement. The distributions of the tracks of tapping movement are about 4.0 mm, but the coefficient of variation is considerable. 3. The quality and quantity of test foods effect the ranges of mouth opening in chewing movement.
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