Purpose To analyse the characteristics of mandibular incisor point chewing movement on frontal plane orbit in youth of normal occlusion.(目的分析正常(牙合)青少年下頜切點額狀面咀嚼運動軌跡的特征。)

Objective: To develop a new method of computer aided design (CAD) of veneer on maxillary incisor.(目的：嘗試上頜中切牙貼面計算機輔助設計(CAD)方法。)

The overlap range of impacted canine and the root of incisors can't be used as an indicator of the extent of the incisor root resorption.(不能依靠曲面斷層片上阻生牙牙冠與鄰牙牙根的重疊范圍來判斷是否存在切牙的牙根吸收及吸收程度。)

Results All parameters of 14 teeth were achieved The parameter of TM in mandibular incisor was the highest and in mandibular first molar lowest.(結果得到右側上下頜14顆牙的牙動度參數的正常范圍，其牙動度參數的均值以下頜前牙最大，下頜第一磨牙最小。)

Management involved positioning the canine teeth into the central incisor region and placing porcelain veneers on these teeth.(管理參與定位犬齒到區域中切牙瓷貼面，把這些牙齒。)

We did a prophylaxis and a little periodontal therapy, bleaching, and a porcelain veneer for the left central incisor.(我們做了一些預防工作和牙周病治療，漂白，為左上中切牙做了瓷貼面。)

By using the finite element method (FEM) software, the vibration of 3-d finite element model of maxillary central incisor tooth was analyzed.(在三維有限元模型的基礎上，利用有限元分析軟件對上頜中切牙的振動模態進行了分析。)

Incisor teeth into the cat and canine and the molars.(貓的牙齒分為門齒、犬齒和臼齒。)

The tendency of the maxillary incisor movement was a lingual-rooted, distal-rooted and extrude-crowned movement.(牙體的運動趨勢表現為牙根舌向移動、牙根遠中傾斜和牙冠伸長的復合運動趨勢。)

The central zone of tensile stress moved to the frenal notch from the pre palate and palatal side of the denture incisor of the base;(拉應力集中區由基托前腭部、前牙腭側移動到唇系帶切跡區；)