title: [Normal occlusion study: using T-Scan III occlusal analysis system].
abstract: OBJECTIVE
  To investigate the normal occlusal force distribution and the characteristics of the occlusion time at different occlusion position using T-Scan III occlusal analysis system.
  
  
  METHODS
  Fifty-three volunteers with normal occlusion, including 29 males and 24 females, were included in this study. The average age was (25.9 ± 2.1) years old. T-Scan III occlusal analysis system was used to measure the occlusal force distribution and the time character of normal occlusion at intercuspal position, protrusive position, and lateral excursive position.
  
  
  RESULTS
  At intercuspal position the left and right side molar teeth took the most part of force percentage, followed by (13.3 ± 4.3)%, (13.6 ± 5.4)%, (15.7 ± 7.1)%, (18.7 ± 7.5)% (6, 6, 7, 7); and 7654, 4567 took (61.3 ± 12.4)% force percentage; and the left and right sides took the respective percentages of (46.4 ± 7.0)%, (53.6 ± 7.0)%, the left side was significantly less than the right side(P < 0.05). At the protrusion position the region ( 21, 12) commitment to take the percentage of (85.1 ± 25.5)%. At left and right lateral position, 28% (13/46) and 30%(14/46) were cuspid-protected occlusion, and 33%(15/46) and 44%(20/46) were group functional occlusion, and 39%(18/46) and 26%(12/46) were multiple-protected occlusion. The average occlusion time was (0.34 ± 0.11) s, and disclusion time was (1.00 ± 0.39) s.
  
  
  CONCLUSIONS
  At intercuspal position the region from first premolar to second molar teeth were the occlusal force centers, and the second molar is the most;.the force concentrated in the area ( 21, 12) at the protrusion position. The lateral occlusal pattern is multiformity.
authors.affiliation: Department of Implant Dentistry, Peking University School and Hospital of Stomatology, Beijing 100081, China.
authors.forename: Fei-fei
authors.initials: FF
authors.lastname: Ma
authors.forename: Xiu-lian
authors.initials: XL
authors.lastname: Hu
authors.forename: Jian-hui
authors.initials: JH
authors.lastname: Li
authors.forename: Ye
authors.initials: Y
authors.lastname: Lin
mesh_terms: D000328:Adult; D001732:Bite Force; D003766:Dental Occlusion; D003799:Dental Stress Analysis / Q000295:instrumentation / Q000379:methods; D005260:Female; D006801:Humans; D008297:Male; D008963:Molar / Q000033:anatomy & histology / Q000502:physiology*; D012815:Signal Processing, Computer-Assisted / Q000295:instrumentation*; D013997:Time Factors; D055815:Young Adult