Initial stress distribution of the maxillary anterior teeth, periodontal ligament and alveolar bone by different intruding loadings A three-dimensional finite element analysis
10.3969/j.issn.1673-8225.2011.48.009
- VernacularTitle:不同加载方式压低上前牙时初始应力在牙体、牙周膜及牙槽骨分布的三维有限元分析
- Author:
Hongfei LU
;
Zhihui MAI
;
Qi CHEN
;
Yue CHEN
;
Hong AI
- Publication Type:Journal Article
- From:
Chinese Journal of Tissue Engineering Research
2011;15(48):8964-8967
- CountryChina
- Language:Chinese
-
Abstract:
BACKGROUND: It is very important to explore an optimal loading force that can both allow effective intrusion and cause no damage to the teeth.OBJECTIVE: To investigate the optimal loading conditions, including loading force values and directions, in the intruding mechanics of maxillary anterior teeth.METHODS: A three-dimensional finite element model (3D FEM) of the maxillary anterior teeth was constructed to include the periodontal ligament (PDL), alveolar bone, and appliance (brackets and wire). The initial stress distribution and force of the maxillary anterior teeth were analyzed when the 3D FEM was loaded with different intruding force values and directions. RESULTS AND CONCLUSION: The optimal value of the intruding force for 6 anterior teeth fell within the range from 0.5 N to 1.0 N. The maximum stress was detected at the distal cervical level of the lateral incisor, and a relatively even distribution of initial stress was observed at 20° palatal deviation to the Y axis. The results suggest that using mini-screw implants at the labial region between the canine and lateral incisor and a combined 0.5-1.0 N intruding force with a distal force could be an optimal intrusion force system by which patients with normal occlusion could obtain a pure intrusion of anterior teeth.
