牙齿的移动:弹性弓丝施加的压力,就像是火车头一样沿着轨迹来引导牙齿的移动。
![](https://video.ask-data.xyz/img.php?b=https://iknow-pic.cdn.bcebos.com/6f061d950a7b02084d63d4556cd9f2d3562cc8d8?x-bce-process=image%2Fresize%2Cm_lfit%2Cw_600%2Ch_800%2Climit_1%2Fquality%2Cq_85%2Fformat%2Cf_auto)
随着牙齿逐渐开始排齐,刚性较强的弓丝替换了弹性弓丝,并且施加了更大的压力。
![](https://video.ask-data.xyz/img.php?b=https://iknow-pic.cdn.bcebos.com/77c6a7efce1b9d165f9571d5fddeb48f8c546430?x-bce-process=image%2Fresize%2Cm_lfit%2Cw_600%2Ch_800%2Climit_1%2Fquality%2Cq_85%2Fformat%2Cf_auto)
随着颌骨的塑形,刚性弓丝将牙齿维持在恰当的排列位置,这常需要几个月的时间颌骨的塑形。
颌骨的塑形,使得牙齿可以向前或向后、向内或向外、向上或向下移动,移动的方向取决于施力的方向。
![](https://video.ask-data.xyz/img.php?b=https://iknow-pic.cdn.bcebos.com/8b13632762d0f703d2657c6806fa513d2797c5ab?x-bce-process=image%2Fresize%2Cm_lfit%2Cw_600%2Ch_800%2Climit_1%2Fquality%2Cq_85%2Fformat%2Cf_auto)
持续的施力导致牙齿所移动方向上的骨质吸收,随着牙齿的漂移,其所包绕的韧带也开始发生牵拉。
![](https://video.ask-data.xyz/img.php?b=https://iknow-pic.cdn.bcebos.com/30adcbef76094b3626b9f359adcc7cd98d109d5f?x-bce-process=image%2Fresize%2Cm_lfit%2Cw_600%2Ch_800%2Climit_1%2Fquality%2Cq_85%2Fformat%2Cf_auto)
被牵拉的韧带提示机体来填补牙齿漂移后形成的间隙,随着时间推移,形成新的骨质沉积,从而维持牙齿在移动后的位置。一口整齐、健康、漂亮的牙齿就出来啦!
![](https://video.ask-data.xyz/img.php?b=https://iknow-pic.cdn.bcebos.com/42166d224f4a20a416c9d5739e529822730ed0ab?x-bce-process=image%2Fresize%2Cm_lfit%2Cw_600%2Ch_800%2Climit_1%2Fquality%2Cq_85%2Fformat%2Cf_auto)