CAJ | 학술논문

目的依据个体化舌侧矫治器的设计特点,建立含有牙、牙周膜、牙槽骨和矫治系统的整体三维有限元模型,分析舌侧矫治器滑动法关闭拔牙间隙阶段的矫治力学机制.方法在三维有限元模型上,模拟临床中舌侧矫治单纯腭侧加力(0.75 N、1.00 N、1.50 N)滑动法关闭拔牙间隙,在ANSYS11.0软件中分别选择牙列单元模型,读取加载结果,观察不同加载力值水平下,牙齿三维方向的移动趋势.结果建立了含有38个实体及372 225个节点,256 739个单元的三维有限元模型.随腭侧加载力值增大,牙列出现了以第一磨牙宽度增加、第二磨牙内翻扭转为主的水平向“拱形效应”,及以前牙舌倾下垂、第一磨牙远中下垂及第二磨牙整体下垂为主要特征的垂直向“拱形效应”.结论个体化舌侧矫治系统单纯腭侧加力滑动法关闭拔牙间隙时,牙列会产生垂直向和水平向的“拱形效应”,临床治疗中需要采取相应措施予以防止.
목적 의거개체화설측교치기적설계특점,건립함유아、아주막、아조골화교치계통적정체삼유유한원모형,분석설측교치기활동법관폐발아간극계단적교치역학궤제.방법재삼유유한원모형상,모의림상중설측교치단순악측가력(0.75 N、1.00 N、1.50 N)활동법관폐발아간극,재ANSYS11.0연건중분별선택아렬단원모형,독취가재결과,관찰불동가재력치수평하,아치삼유방향적이동추세.결과건립료함유38개실체급372 225개절점,256 739개단원적삼유유한원모형.수악측가재력치증대,아렬출현료이제일마아관도증가、제이마아내번뉴전위주적수평향“공형효응”,급이전아설경하수、제일마아원중하수급제이마아정체하수위주요특정적수직향“공형효응”.결론개체화설측교치계통단순악측가력활동법관폐발아간극시,아렬회산생수직향화수평향적“공형효응”,림상치료중수요채취상응조시여이방지.
Objective To construct an entire 3D finite element model including dentition,periodontal ligament,alveolar bone and the lingual appliance,according to the design principles of the customized lingual system.The biomechanical properties for sliding mechanics of the space closure stage were analyzed.Methods Using the 3D FE model,the teeth movement tendency in three dimensions were analyzed in different loading conditions(0.75 N,1.00 N,1.50 N ).Results The 3D finite element model including 38 volume models,372 225 nodes and 256 739 elements was constructed.Horizontal and vertical “bowing effect” with some unexpected tooth movement could be found during an increasing loading.Conclusions Both horizontal and vertical “bowing effect” appeared in the dental arch when using a single palatal force sliding mechanics in the customized lingual appliance.Therefore,clinicians should take some corresponding measures to counteract those side effects.