Quantitative study on occlusal balance of normal occlusion in intercuspal position
Hu, Z.-g.; Cheng, H.; Zheng, M.; Zheng, Z.-q.; Ma, S.-z.
Zhonghua Kou Qiang Yi Xue Za Zhi 41(10): 618-620
2006
ISSN/ISBN: 1002-0098 PMID: 17129453 Document Number: 598856
To assess occlusal balance of normal occlusion in intercuspal position with maximal bite force. Maximal bite force was recorded in intercuspal position by use of T-Scan II system from 123 subjects with normal intact dentitions. Occlusal balance of normal occlusion was quantitatively analyzed from center of force, percentage of bite force, and occlusal contacts. The relative position of the center of bite force, the difference in bilateral force percentage, and unsymmetrical coefficient followed normal distributions. The 95% reference ranges for corresponding testing items were -6.60 to 6.68 mm, -15.50% to 12.10%, and 0.65 to 1.39. There was no statistic difference (P = 0.915) in occlusal contacts between left and right sides. The 98.4% of normal occlusion subjects had the center of bite force locating in posterior region of dentition when biting with maximal force in intercuspal position. Occlusal balance could be evaluated by T-Scan II system. Occlusion of normal subjects biting with maximal force was stable and bilaterally balanced in intercuspal position.