Results: The geometric feature parameters of28 artificial teeth in their own coordinates were obtained, including the mesiodistal and buccolingual dimension, the height and inclination of cusp. 结果:得到28颗人工牙的颊舌径、近远中径、牙尖高度、中央窝深度、牙尖平衡斜面斜度的数据。
Study on Mesiodistal Tooth Size and the Relationship between upper and Lower Teeth Dimension of Normal Occlusion from Han People in Xi an; Three-dimensional Reconstruction and Measurement of the Edentulous Adult's Mandible 西安地区正常(牙合)牙冠宽度测量及上下颌牙量相关性研究牙列缺损成人下颌骨的CT三维重建和测量
Measurements and analyses of the relationship between the mesiodistal width of the maxillary central incisor and nasal width 正常人鼻与上中切牙宽度关系的测量分析
Conclusion: The impaction of mandibular third molar were related to the development of the mandible. The length of retromolar space, the length of the mandibular alveolar ridge and the ratio of the length of retromolar space and the mesiodistal crown width were the main affecting factors. 结论:下颌第三磨牙阻生与下颌骨发育相关,磨牙后间隙的长度、磨牙后间隙长度与第三磨牙牙冠宽度比值是主要的影响因素。
CONCLUSION: The micro-implant can be safely loaded with 200 grams of mesiodistal orthodontic force. 结论:微小种植体可在任何倾斜角度上承载200g的水平向正畸力。
Result: The length of retromolar space, the length of the mandibular alveolar ridge and the mesiodistal crown width of mandibular third molar were related to the impaction of mandibular third molar, but the gonial angle, the crystal-marginal angle were not. 结果:磨牙后间隙长度、下颌骨牙槽长度和第三磨牙牙冠宽度与第三磨牙阻生相关,下颌角和嵴缘夹角角度与阻生牙无关。
Various environmental factors influence the mesiodistal dimension of the teeth crown. 人类在演化过程中,各牙位受到的影响条件不一致。
Methods: 487 human mandibular anteriors were examined by indirect digital radiography both from buccolingual and mesiodistal directions. 方法:采用间接数字化X线成像技术拍摄487颗下颌前牙的近远中向和颊舌向X线影像,分析根管的弯曲情况。
Method The post treatment dental casts of 43 four first premolar extraction cases and 36 non extraction cases both with good occlusion were selected. Mesiodistal widths of mandibular and maxillary teeth were measured and Bolton index were calculated. 方法选取43例拔除4个第一双尖牙和36例不拔牙治疗结果满意的病例,测量治疗后模型的牙齿宽度,计算比较其Bolton指数的差异;
Results Obviously positive correlations were showed, including crown/ root length and span, mesiodistal widths/ buccolingual thickness of crown and cervical and root middle point. 结果冠长(根长)和全长,冠颊舌径、颈近远中径、颈颊舌径和根1/2近远中径(根1/2颊舌径)成显著正相关。
Results: The fracture of mesiodistal direction was often occurred in the first type dentures when patients'occlusion was lower; 结果:一类义齿咬合低时易发生近远中向折裂;
Conclusions: ( 1) The mesiodistal crown dimensions of teenagers in the contemporary increases with the improvement of nutrition. 因此本实验认为:(1)良好的健康和营养使我国当代青少年牙冠宽度较以前有所增加。
Then digital X-ray film ( RVG) was radiographed in buccolingual and mesiodistal directions and was recorded. 然后拍摄颊舌向和近远中向数字化X线片(RVG),记录RVG影像图片。
Most of the first permanent premolars of Han middle age and old people in Shandong region have one root and curve to mesiodistal direction. 山东地区汉族中老年第一前磨牙仍以单根为主,多向近远中方向弯曲。
Combined with the of mesiodistal crown width measured, the method was applied to analysis dental arch crowding degree. 研究了一种自动探测牙弓曲线和牙弓曲面的方法,结合牙冠宽度的测量,将该方法应用于牙弓拥挤度分析。