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.
结果：所有患者均有良好的咬合关系，且保持咬合的稳定性。
Results All study subjects demonstrated good occlusal relationship and stability at the end of the study.
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.
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