口腔正畸学的生物学基础在于颌骨的可塑性、牙骨质的抗压性及牙周膜内环境的稳定性。
It is well know that the biological basis of Orthodontics is the plasticity of jaw, the strength-proof of cementum and the stability of periodontal ligament internal environment.
牙槽骨具有高度可塑性，可随着牙齿的生长、脱落及咀嚼压力的变化而变化。
Alveolar bone has high plasticity, which can change as the tooth grows and falls off, and the chewing pressure changes.
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