摘要
目的研究上颌切牙段在方丝弓"T"形曲近远中各加15°"人"字曲的情况下牙齿及牙周支持组织应力分布及移动趋势。方法三维有限元分析方法,所采用的模型为包括牙齿、牙周膜、牙槽骨、托槽、弓丝在内的左侧上颌切牙段有限元模型[1]。模型上模拟"T"形曲近远中各加15°"人"字曲的情况进行加载。结果在"人"字曲加力的瞬间,侧切牙与中切牙相比更趋近于可控性的倾斜移动;无论是位移和应力水平侧切牙均显著高于中切牙。结论"人"字曲的使用,可以更好地控制间隙两侧牙齿的移动。
Objective The paper is intended to study the stress distribution and movement tendency of the maxillary incisors in teeth and periodontal tissues in case of the T-loop with an angleof 15 degress added at the junctions of the vertical and horizontal legs. Methods The research was based on the three dimensional finite method,with 3-D element model of maxillary incisors on the left side employed including anchwire?brackets?incisors?periodontal ligaments and alveolar bone. Results The study reveals that when the gable bend was activated,lateral incisor was more likely to incline controllably than incisor .The displacement and the stress on the lateral incisor were more evident than those on incisor. Conclusion It can be justified that the employment of gable bend can efficiently control the movement of the teeth in filling the extracted socket.
出处
《中国美容医学》
CAS
2004年第3期340-342,共3页
Chinese Journal of Aesthetic Medicine
