摘要促进正畸牙周组织的骨改建从而缩短矫治疗程，一直是目前口腔正畸学研究的热点。
How to promote periodontium remodeling shorten orthodontic course is a hotspot in orthodontic research.
结论：狗乳牙正畸移动后恒牙胚牙周组织发生骨改建。
Conclusion: Bone remodel around the permanent tooth germ resulted from primary tooth orthodontic movement.
结论：低强度激光照射能促进兔正畸牙pdl的血管化反应，从而有益于正畸牙周组织的改建。
Conclusion Low energy laser radiation can accelerate the vascularized reaction in PDL of the removed teeth, which may promote the reconstruction of PDL and alveolar bone.
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