CAJ | 학술논문

组织构建%组织工程%牵张成骨%牙齿移动%三维有限元法%错牙合畸形%尖牙%牙槽间隔减阻%生物力学%正畸治疗%应力分析%数字化口腔科技术%新疆维吾尔自治区自然科学基金組織構建%組織工程%牽張成骨%牙齒移動%三維有限元法%錯牙閤畸形%尖牙%牙槽間隔減阻%生物力學%正畸治療%應力分析%數字化口腔科技術%新疆維吾爾自治區自然科學基金
조직구건%조직공정%견장성골%아치이동%삼유유한원법%착아합기형%첨아%아조간격감조%생물역학%정기치료%응력분석%수자화구강과기술%신강유오이자치구자연과학기금
malocclusion%periodontal ligament%finite element analysis

背景：牙周膜牵张成骨通过力作用于牙周膜，带动牙齿移动；牙槽骨牵张成骨是通过整个骨盘的位移，达到牙齿移动的效果。 　　目的：建立基于健康成人的、3种不同状态下的上下颌三维有限元模型，采用三维有限元方法对比研究3种模型在力的加载下应力分布和瞬时位移情况。 　　方法：模型1通过多种软件结合建立常规状态下、模型2建立牙周膜减阻牵张成骨后、模型3建立牙槽骨减阻牵张成骨后移动尖牙的三维有限元模型，分别模拟力的加载。 　　结果与结论：3种模型的最大瞬时位移均发生在尖牙近中牙冠上1/3处，其值模型2>模型3>模型1；最大等效应力均位于上颌尖牙远中侧牙槽嵴处，其值模型2<模型1<模型3。说明牙槽骨和牙周膜减阻牵张成骨均能有效减小牙移动阻力，增加尖牙瞬时位移，且去除尖牙远中骨质效果更为显著。两种方法成功避免了支抗丧失，但尖牙存在远中倾斜趋势，临床工作中应采取相应措施加以控制。
배경：아주막견장성골통과력작용우아주막，대동아치이동；아조골견장성골시통과정개골반적위이，체도아치이동적효과。 　　목적：건립기우건강성인적、3충불동상태하적상하합삼유유한원모형，채용삼유유한원방법대비연구3충모형재력적가재하응력분포화순시위이정황。 　　방법：모형1통과다충연건결합건립상규상태하、모형2건립아주막감조견장성골후、모형3건립아조골감조견장성골후이동첨아적삼유유한원모형，분별모의력적가재。 　　결과여결론：3충모형적최대순시위이균발생재첨아근중아관상1/3처，기치모형2>모형3>모형1；최대등효응력균위우상합첨아원중측아조척처，기치모형2<모형1<모형3。설명아조골화아주막감조견장성골균능유효감소아이동조력，증가첨아순시위이，차거제첨아원중골질효과경위현저。량충방법성공피면료지항상실，단첨아존재원중경사추세，림상공작중응채취상응조시가이공제。
BACKGROUND:Peridental membrane distraction osteogenesis exerts the functions at peridental membrane and leads to tooth movement. Alveolar bone distraction osteogenesis produces tooth movement through the displacement of the whole bone plate. OBJECTIVE:To establish three-dimensional finite element model of upper and lower jaw of healthy adults under three different conditions, and to compare the stress distribution and distal movement of the models using three-dimensional finite element analysis method. METHODS:Model 1:three-dimensional finite element model of the canine under normal conditions using a variety of software;Model 2:three-dimensional finite element model of the canine after distracting osteggenesis of the periodontal ligament;Model 3, three-dimensional finite element model of the canine after reducing resistance and distracting osteggenesis of the alveolar bone. The force loadings were stimulated among these models. RESULTS AND CONCLUSION:The biggest displacements on those three models occurred in canine crown on 1/3, and the displacement quantity on canine was model 2>model 3>model 1. The biggest equivalent stress concentrated in distal alveolar crest, and the equivalent stress was model 2<model 1<model 3. In the process of canine distal movement, reducing bone resistance and distracting osteggenesis, especial y distal alveolar crest of canine, can accelerate the tooth moving speed effectively. And the two ways successful y avoid the loss of anchorage. We should notice that the canine has distal motion tendency under the action of force, appropriate measures should be taken to control it in clinical work.