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多年来对调(牙合)的时间、原因和方法一直存在争论。许多牙科修复的失败是咬合力处理不当引起的。在讨论对天然牙调(牙合)之前,必须建立咬(牙合)标准,以作为确定调(牙合)的时间、原因和方法的根据。调(牙合)的标准:1)在正中关系(牙合)(CRO)和正中(牙合)(CO)中,牙齿接触最多,(牙合)力尽可能沿牙长轴传导。2)前导与功能接触协调。3)工作侧组牙功能与前导和髁头边缘运动一致。4)非工作侧无接触。5)前伸时后牙无接触。正中的含义:1)正中关系(CR):髁头在关节凹最上位;颌骨位置决定于神经肌肉与牙无关;它是一个边缘位相不常用的功能位;又称终末铰链位,真正正中关系。 2)正中关系(牙合)(CRO);牙齿在正中关系时的咬合接触;又称之为后退接触位。
Over the years the transfer (occlusion) time, causes and methods have been controversial. Many dental restoration failures result from improper bite force handling. Before discussing natural teeth (occlusion), a bite standard must be established as the basis for determining when, why and how to adjust the occlusion. Tiaopian standards: 1) In the middle of the occlusion (CRO) and middle occlusion (CO), the teeth contact the most, occlusal force as much as possible along the long axis of the tooth conduction. 2) Leading and functional contact coordination. 3) Working side group teeth function and condyle and condyle head edge movement consistent. 4) Non-working side without contact. 5) Forelimb without contact after extension. The meaning of the middle: 1) the middle relationship (CR): the condylar head in the most concave joint; jaw position depends on neuromuscular and has nothing to do; it is a marginal phase is not commonly used function; also known as the terminal hinge position, true Middle relationship. 2) the middle relationship (occlusion) (CRO); occlusal contact of the teeth in the middle of the relationship; also known as the receding contact.