牙齿因松动而脱落是因为不正常咬合的缘故。
Teeth that have moved may be lost because of abnormal biting pressures.
不正常咬合的压力会破坏牙齿周围组织，和破坏巩固牙齿的组织。
They destroy both the tissues that surround the tooth and the tissues that hold the tooth securely.
下颚间的牙齿咬合不正会磨损牙齿并造成咀嚼问题，此外，也会造成外表美观的问题。
Misalignment of teeth between the upper and lower jaws can grind down the teeth and cause problems in chewing. Elsewhere, it is a cosmetic problem.
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