Three-dimensional analysis of the early correction of anterior crossbite using eruption guidance appliance.
- Author:
Xu WANG
1
,
2
,
3
,
4
,
5
,
6
;
Jing Jing ZHANG
7
;
Fu Song YUAN
7
;
Yu WANG
7
;
Cheng Hao LI
8
;
Juha Eerik VARRELA
9
;
Jiang YUE
10
;
Li Hong GE
7
Author Information
1. Department of Pediatric Dentistry,Peking University School &
2. Hospital of Stomatology &
3. National Clinical Research Center for Oral Diseases &
4. National Engineering Laboratory for Digital and Material Technology of Stomatology &
5. Beijing Key Laboratory of Digital Stomatology &
6. Research Center of Engineering and Technology for Digital of Ministry of Health, Beijing 100081,China.
7. Department of Pediatric Dentistry,Peking University School & Hospital of Stomatology & National Clinical Research Center for Oral Diseases & National Engineering Laboratory for Digital and Material Technology of Stomatology & Beijing Key Laboratory of Digital Stomatology & Research Center of Engineering and Technology for Digital of Ministry of Health, Beijing 100081,China.
8. Department of Pediatric Dentistry,The Affiliated Stomatology Hospital of Tongji University, Shanghai 200072, China.
9. Institute of Dentistry,University of Turku,Turku 20014,Finland.
10. Institute of Children's Oral Health of Qingmiao,Beijing 100085, China.
- Publication Type:Journal Article
- MeSH:
Child;
Dentition, Mixed;
Female;
Humans;
Incisor;
Malocclusion;
Malocclusion, Angle Class II;
Tooth Eruption
- From:
Journal of Peking University(Health Sciences)
2018;50(3):532-537
- CountryChina
- Language:Chinese
-
Abstract:
OBJECTIVE:To investigate the clinical effect of eruption guidance appliance in the treatment of anterior cross bite in mixed-dentition children.
METHODS:In the study,10 mixed-dentition children with anterior cross bite, totally 12 incisors, were selected. Alginate was used to take upper and lower dentition impression and make a hard plaster model,which served as the eruption guidance appliance for treatment. The pre- and post-operative dental casts were digitized with SmartOptics Activity 880 scanner,and the three-dimensional overlapping models were obtained by reverse engineering software,Geomagic Studio 2012,then the three-dimensional movements of the upper and lower incisors were analyzed using Imageware 13.2 software. The overbite and overjet were analyzed using the same methods. Measurement with copper wire was used to analyze the upper and lower arch length. Space analysis was the result by the sum of crown width minus the arch length. The crown width of unerupted permanent teeth was according to X-ray method to predict. The SPSS 17.0 software was used to analyze the pre- and post-operative measurements of the same child. The normality test of the measured data showed that it conformed to the normal distribution. Therefore,the t test and double side test were used,and the significance level was 0.05.
RESULTS:The course of treatment was (5.6±2.7) months. During orthodontic treatment, the upper incisors moved mainly labially (P<0.001) in three-dimensional displacement, and the lower incisors moved mainly the same direction (P=0.025). During the treatment of eruption guidance appliance,the average overbite decreased (1.01±0.9) mm (t=-3.531, P=0.006), and the difference was statistically significant. There was no statistically significant difference between the pre- and post-operative average overjet (t=0.771, P=0.460). The severity of crowding in upper arch decreased (1.9±0.99) mm (t=-6.042, P<0.001),and that in lower arch decreased (1.9±0.74) mm (t=-8.143, P<0.001), both of the differences were statistically significant.
CONCLUSION:The anterior cross bite in mixed dentition could be corrected by eruption guidance appliance, and at the same time, the normal overjet and overbite were established, and the teeth were aligned.
