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Influence of low-intensity laser therapy on the stability of orthodontic mini-implants: a study in rabbits

2012; Elsevier BV; Volume: 115; Issue: 2 Linguagem: Inglês

10.1016/j.oooo.2011.09.036

2212-4411

Mardônio Rodrigues Pinto, Rogério Lacerda dos Santos, Matheus Melo Pithon, Mônica Tirre de Souza Araújo, João Paulo Viana Braga, Lincoln Issamu Nojima,

Cephalopods and Marine Biology

The objective of this study was to assess stability of different orthodontic mini-implants in the tibia of rabbits after low-intensity laser therapy.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.There was a statistically significant difference only between Group TF submitted to laser and all the other groups (P < .05).Low-intensity laser was capable of increasing stability of self-threading orthodontic mini-implants.