近40年来，学者们对快速上颌扩弓进行了大量的临床和基础研究。
During recent 40 years, many clinical and basic researches have been done on RME.
目的探讨上颌唇向扩弓活动矫治器对上前牙拥挤的治疗效果。
Objective To discuss the curative effect of upper jaw lip-side expansion for anterior teeth.
方法对21例患者进行上颌唇向扩弓活动矫治器治疗。
Methods 21 cases of such patient were received the lip-side expansion.
结论：龈沟液中AST的活性可以在一定程度上反映上颌快速扩弓牙周组织的改建。
Conclusion: The results suggest that AST activities in GCF reflect the tissues remodeling which occurs in the periodontium to some degree during rapid palatal expansion.
结论：龈沟液中AST的活性可以在一定程度上反映上颌快速扩弓牙周组织的改建。
Conclusion: The results suggest that AST activities in GCF reflect the tissues remodeling which occurs in the periodontium to some degree during rapid palatal expansion.
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