[Occlusal contacts in intercuspal position after orthodontic treatment].
OBJECTIVE
To observe the occlusal contacts in intercuspal position(ICP) in adolescent patients after orthodontic treatment.


METHODS
Fourteen adolescent patients after orthodontic treatment were selected as experimental group and 17 healthy adolescents and young adults with normal occlusion were selected as control group. The occlusal contact in ICP in the two groups were recorded with T-Scan II system and compared.


RESULTS
When the total of force (TOF) were 1/10 TOFmax, 1/4 TOFmax, 1/2 TOFmax, 3/4 TOFmax and TOFmax, the number of occlusal contacts in the anterior segment in the experimental group were 1.5(1.0), 3.0(1.3), 4.5(3.3), 5.5(3.0), 5.5(3.3), which were significantly larger than that in control group [0.0(0.3), 0.0(0.6), 0.3(0.5), 0.3(1.0), 0.0(1.8), P < 0.05]. There were no significant difference in the area of occlusal contacts in the posterior segment between experimental group and control group (P > 0.05). The center of force (COF) in the experimental group located significantly more mesially than that in control group. The value of ICP contact time in experimental group was 0.192(0.141) s and no significant difference was found between experimental group and control group [0.163(0.200) s].


CONCLUSIONS
Although the patients achieved normal occlusion after orthodontic treatment, their anterior teeth received more occlusal force than those in healthy adolescents and young adults with normal occlusion.
An
Wei-wei
WW
Department of Orthodontics, Capital Medical University School of Stomatology, Beijing 100050, China.
Wang
Bang-kang
BK
Bai
Yu-xing
YX
D000293:Adolescent; D001732:Bite Force; D016022:Case-Control Studies; D003766:Dental Occlusion; D006801:Humans; D007180:Incisor; D009970:Orthodontics; D055815:Young Adult