CAJ | 학술논문

目的建立包含eBrace托槽、牙、牙周膜、牙槽骨、弓丝和微种植体在内的三维有限元模型,为分析个体化舌侧矫治器上颌腭部不同位置微种植体滑动法关闭上前牙间隙的生物力学特征做准备.方法依据eBrace个体化舌侧矫治器的设计特点,基于CT采集的实际数据,先建立实体模型,再构建含有牙、牙周膜、牙槽骨、托槽、弓丝和微种植体6个成分的个体化舌侧矫治系统的三维有限元模型.结果 1.根据微种植体植入位置不同,共建立6个有限元模型,微种植体分别位于上颌第二双尖牙和第一磨牙间、第一磨牙和第二磨牙间距离牙槽嵴顶2 mm、6mm和10 mm.每个模型包括40个实体模型.2.用10节点四面体单元进行单元剖分,第一个模型(微种植体在上颌第二双尖牙和第一磨牙之间距离牙槽嵴顶2 mm)在网格剖分后有节点741 670个,单元513 925个.其他模型的节点数和单元数类似.结论建立了包含eBrace托槽、牙、牙周膜、牙槽骨、弓丝和微种植体在内的三维有限元模型,该有限元模型构建全面、复杂、真实,几何相似性很强;为下一步分析个体化舌侧矫治器上颌腭部不同位置微种植体滑动法关闭上前牙间隙的生物力学特征奠定了基础.
목적 건립포함eBrace탁조、아、아주막、아조골、궁사화미충식체재내적삼유유한원모형,위분석개체화설측교치기상합악부불동위치미충식체활동법관폐상전아간극적생물역학특정주준비.방법 의거eBrace개체화설측교치기적설계특점,기우CT채집적실제수거,선건립실체모형,재구건함유아、아주막、아조골、탁조、궁사화미충식체6개성분적개체화설측교치계통적삼유유한원모형.결과 1.근거미충식체식입위치불동,공건립6개유한원모형,미충식체분별위우상합제이쌍첨아화제일마아간、제일마아화제이마아간거리아조척정2 mm、6mm화10 mm.매개모형포괄40개실체모형.2.용10절점사면체단원진행단원부분,제일개모형(미충식체재상합제이쌍첨아화제일마아지간거리아조척정2 mm)재망격부분후유절점741 670개,단원513 925개.기타모형적절점수화단원수유사.결론 건립료포함eBrace탁조、아、아주막、아조골、궁사화미충식체재내적삼유유한원모형,해유한원모형구건전면、복잡、진실,궤하상사성흔강;위하일보분석개체화설측교치기상합악부불동위치미충식체활동법관폐상전아간극적생물역학특정전정료기출.
Objective To construct an 3-D FEM model including e-Brace brackets,dentition,periodontal ligaments,alveolar bone,lingual wires and micro-implants to analyze the biomechanical characteristics of the customized lingual bracket system during retracting maxillary anterior teeth at different micro-implant loading positions.Methods Volume models of the interested parts were first constructed based on CT scan data.Then the finite models of customized lingual system,including eBrace brackets and wires,dentition,periodontal ligaments,alveolar bone,and micro-implants were constructed.Results 1.Six 3-D FEM models were constructed at different micro-implant loading positions.The micro-implants were either between the second premolar and the first molar or the first molar and the second molar,at 2 mm,6 mm or 10 mm levels from the alveolar ridge crest.Every 3-D FEM model includes forty volume models.2.Ten-node tetrahedron analysis of the 3-D FEM model includes 741670 nodes,513925 elements at the micro-implant loading position between the second premolar and the first molar,2mm from the alveolar ridge crest.The other 3-D FEM models include similar nodes and elements at different micro-implant loading positions.Conclusions The originated eBrace customized lingual 3-D FEM model has high geometrical similarity,and is hence reasonable,reliable and practical.It could be used to analyze the biomechanical characteristics of the lingual system during retracting anterior teeth with micro-implants and sliding mechanisms.