低强度激光治疗对正畸微种植体稳定性的影响：兔的研究。
Influence of low-intensity laser therapy on the stability of orthodontic mini-implants: a study in rabbits.
机构信息
Federal University of Rio de Janeiro, UFRJ, Rio de Janeiro, Brazil.
出版信息
Oral Surg Oral Med Oral Pathol Oral Radiol. 2013 Feb;115(2):e26-30. doi: 10.1016/j.oooo.2011.09.036. Epub 2012 May 22.
OBJECTIVE
The objective of this study was to assess stability of different orthodontic mini-implants in the tibia of rabbits after low-intensity laser therapy.
MATERIAL AND METHODS
Thirty-two mini-implants were assessed, 16 were self-threading (Titanium Fix) and 16 self-perforating (INP). These were inserted into the tibia of rabbits and immediately loaded with a horizontal force of 200g uniting 2 mini-implants in each tibia. Then they were submitted to low-intensity laser therapy for 21 days. Sixteen male New Zealand breed rabbits were used, and divided into 2 groups of 8 animals each as follows: Groups INP and TF. In both groups, mini-implants were submitted to low-intensity laser therapy (right tibia) and their respective controls (left tibia) did not undergo laser therapy. After the animals were killed, blocks of bone tissue containing the mini-implants were removed so as to perform mechanical pull-out tests.
RESULTS
There was a statistically significant difference only between Group TF submitted to laser and all the other groups (P < .05).
CONCLUSIONS
Low-intensity laser was capable of increasing stability of self-threading orthodontic mini-implants.
目的
本研究旨在评估低强度激光治疗后不同正畸微型种植体在兔胫骨中的稳定性。
材料与方法
评估了 32 个微型种植体，其中 16 个为自攻型（Titanium Fix），16 个为自穿孔型（INP）。这些微型种植体被植入兔胫骨中，并立即施加 200g 的水平力，将每块胫骨中的 2 个微型种植体连接起来。然后，它们接受了 21 天的低强度激光治疗。使用了 16 只雄性新西兰品种兔，分为两组，每组 8 只，如下所示：INP 组和 TF 组。在这两组中，微型种植体都接受了低强度激光治疗（右胫骨），而它们各自的对照侧（左胫骨）则没有接受激光治疗。动物死后，取出包含微型种植体的骨组织块，以进行机械拔出试验。
结果
仅在接受激光治疗的 TF 组与所有其他组之间存在统计学上的显著差异（P <.05）。
结论
低强度激光能够提高自攻型正畸微型种植体的稳定性。
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