口腔科论文英文词汇大全

ligning both upper and lower posterior teeth with the principal direction of muscle contraction produces the greatest resistance to masticatory forces and creates the inclinations that form the curve of Wilson (wilson 曲线）。There are two reasons for the inclination倾斜 of posterior teeth后牙. One has to do with resistance to loading; second has to do with masticatory function. If the buccolingual颊舌侧 inclination of posterior teeth is analyzed in relation to the dominant direction of muscle force against them, it will be apparent that the axial alignment of all posterior teeth is nearly parallel with the strong inward pull of medial pterygoid muscles翼内肌. The strongest component of lateral横向的 function occurs nearly parallel with the direction of medial pterygoid muscles翼内肌, which bilaterally双侧 pull the condyles髁突 medially to the midmost position of centric relation.双侧拉髁突向正中关系位的正中位置 Aligning both maxillary 上颌and mandibular posterior teeth 下颌后牙with the principal direction of muscle contraction produces the greatest resistance to masticatory forces and creates the inclinations that form the curve of Wilson wilson曲线.When the curve of Wilson is made too flat平, ease of masticatory function may be impaired because of the increased activity required to get the food onto the occlusal table.合平面 The greater the relative height of mandibular lingual cusps下颌舌尖, the greater the problem of chewing efficiency may become. If the lingual cusps of mandibular posteriors assume a position above the optimum level, the thrusting of food bolus by the tongue toward the occlusal table合平面 will be impaired. Furthermore, if the buccal cusps of maxillary posteriors were to assume a position below the optimum level, the action of the buccinator muscle to push the food bolus toward the occlusal table, would be similarly affected. In both these conditions, the curve of Wilson gets altered, and masticatory efficiency is jeopardized. With a large lateral occlusal curvature (substantial lingual inclination of the mandibular molars), the inclinations of the inside slope of the mandibular buccal cusp against the horizontal plane increases, making interfering occlusal contacts of the nonworking side possible. Thus, during mandibular movement, abnormal periodontal sensation, and muscle tension could be caused by a geometric limitation, especially at the distal of the fourth key is related to the curve of Wilson,describing the posterior inclination of the crowns of the posterior upper teeth as a concave curve, setting the mo-lars with a lingual torque.以肌肉收缩的主要方向对上下后牙进行木质化产生了对咀嚼力的最大抵抗，并且产生形成Wilson曲线的倾斜。后牙后倾的倾向有两个原因。一个与抵抗负载有关;第二个与咀嚼功能有关。如果分析后牙的颊舌侧倾斜与相对于它们的肌肉力的主导方向，显而易见的是，所有后牙的轴向对齐几乎平行于内侧翼状肌的强内向拉肌。横向的功能最强的组成部分与内侧翼状肌的内侧方向几乎平行，双侧双侧拉髁突髁突向中心位置的中间位置。双侧拉髁突向正中关系正中位置矫正上颌上颌和下颌后牙下颌后牙与肌肉收缩的主要方向产生最大的咀嚼力抵抗，并形成倾斜，形成威尔逊威尔逊曲线的曲线。当Wilson曲线过平时，咀嚼功能的缓解可能会受到影响，因为需要增加活动以将食物放到咬合表上。合平面下颌舌尖的相对高度越大，下颌舌尖越大咀嚼效率的问题可能会出现。如果下颌骨后部的舌尖位于最佳水平以上的位置，则由舌头朝向咬合表合平面推动食物块将受到损害。此外，如果上颌骨下颊的颊侧尖突处于低于最佳水平的位置，则颊侧肌肉朝向咬合表推动食物块的作用将类似地受到影响。在这两个条件下，威尔逊的曲线被改变，并且咀嚼效率受损。具有下颌磨牙的大致舌侧倾斜，下颌颊侧尖角的内侧斜面相对于水平面的倾斜增加，使得非工作侧的干涉咬合接触成为可能。因此，在下颌运动期间，异常牙周感觉和肌肉张力可能由几何限制引起，特别是在弓的远端。第四个关键点与Wilson曲线相关，描述了后上牙齿的牙冠的后倾角作为凹曲线，用舌侧扭矩设定牙弓。

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