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| 唇、舌侧正畸中上颌中切牙转动中心的研究 | |
| 引用本文： | 梁炜,林久祥,徐宝华,荣起国. 唇、舌侧正畸中上颌中切牙转动中心的研究[J]. 口腔正畸学, 2008, 15(3): 121-123 |
| 作者姓名： | 梁炜 林久祥 徐宝华 荣起国 |
| 作者单位： | 1. 北京大学几腔医学院·口腔医院,100081 2. 北京中日友好医院 3. 北京大学力学与工程学系 |
| 摘 要： | 目的从生物力学的角度，分析比较唇侧和舌侧正畸中的上中切牙转动中心与M／F的关系方法通过有限元法技术，建立较理想的上颌骨、上切牙及牙周膜的三维有限元模型；进而分析唇、舌侧正畸中的上中切牙转动中心与M／F的关系，比较两者的异同。结果1．建立了较理想的上颌骨、上切牙及牙周膜的三维有限元模型2．本研究，上中切牙阻力中心在距牙槽嵴顶0．43倍根长处。3．唇舌侧正畸中，上中切牙在相同的M／F加载下。转动中心的位置不同。若要产生牙齿的整体移动的效果，唇舌侧正畸所需的M／F比值分别为-8．87和12．38。结论舌侧正畸中，内收切牙的同时要加大根舌向转矩，不能根据唇侧加力的经验来做判断。 |
| 关 键 词： | 舌侧正畸 有限元法 三维有限元模型 |
Difference of the center of rotation of the upper incisors between lingual and labial orthodontics |
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| LIANG Wei,LIN Jiuxiang,XU Baohua,RONG Qiguo. Difference of the center of rotation of the upper incisors between lingual and labial orthodontics[J]. Chinese Journal of Orthodontics, 2008, 15(3): 121-123 | |
| Authors: | LIANG Wei LIN Jiuxiang XU Baohua RONG Qiguo |
| Affiliation: | LIANG Wei , LIN Jiuxiang , XU Baohua , RONG Qiguo( Department of Othodontics, Peking University School and hospital of Stomatology, Beijing 100081) |
| Abstract: | Objective To analyse the different centers of rotation(Co) of the upper incisors between lingual and labial orthodontics.Methods A three-dimensional finite element model of the maxilla and upper incisors was constructed.Then the biomechanical differences of the relationship of Co and M/F between the lingual and labial orthodontics had been analyzed.Results The center of resistance (CR) of the upper central incisor was at a point 0.44 times the root length from the alveolar crest.To translate the tooth,the m... |
| Keywords: | Lingual Orthodontics Finite element method Three-dimensional finite element model |
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