[Quantitative study on occlusal balance of normal occlusion in intercuspal position].
OBJECTIVE
To assess occlusal balance of normal occlusion in intercuspal position with maximal bite force.


METHODS
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.


RESULTS
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.


CONCLUSIONS
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.
Hu
Zhi-gang
ZG
Department of Prosthodontics, The Affiliated Hospital of Stomatology, Fujian Medical University, Fuzhou 350002, China.
Cheng
Hui
H
Zheng
Ming
M
Zheng
Zhi-qiang
ZQ
Ma
Shou-zhi
SZ
D000293:Adolescent; D001732:Bite Force; D003767:Dental Occlusion, Balanced; D003799:Dental Stress Analysis / Q000295:instrumentation; D005260:Female; D006801:Humans; D007091:Image Processing, Computer-Assisted; D007574:Jaw Relation Record; D008297:Male; D012016:Reference Values; D055815:Young Adult