Effects of Different Parameters of Diode Laser on Acceleration of Orthodontic Tooth Movement and Its Effect on Relapse: An Experimental Animal Study

  • Aya Ehab Elkattan Orthodontic and Pedodontic Department, National Research Centre, Cairo, Egypt
  • Mostafa Gheith Laser Application in Dental Science, Cairo University, Cairo, Egypt
  • Mona Salah Fayed Orthodontics, Faculty of Oral and Dental Medicine, Cairo University, Cairo, Egypt
  • M. Abo El Yazeed Pediatric Dentistry, National Research Centre, Cairo, Egypt
  • Abdel-Razik H. Farrag Histochemistry, Pathology Department, National Research Centre, Cairo, Egypt
  • Wagdy K. B. Khalil Animal Genetics Cell Biology Department, National Research Centre, Cairo, Egypt
Keywords: Low-level laser therapy, Orthodontics, Different parameters, Acceleration of orthodontic tooth movement, Relapse


AIM: Recent studies have demonstrated that low-level laser therapy (LLLT) can accelerate orthodontic tooth movement. However, there is still controversy about the optimum parameters that can cause acceleration. The present study was designed to examine two different doses of LLLT in the acceleration of orthodontic tooth movement and their effect on relapse.

METHODS: An orthodontic appliance was designed to induce tooth movement on lower incisors of rabbits. The in-al-as diode laser was used to radiate different groups of rabbits according to a specific protocol. The amount of tooth movement was measured for 21 days, and then the orthodontic appliance was removed, and the relapse was measured till day 28.

RESULTS: The amount of tooth movement was significantly greater in the group with irradiation of low dose in comparison with the high dose group and the control group. The relapse was greatest in the group of low dose irradiation and least in the control group.

CONCLUSION: The findings suggest that LLLT with a low dose accelerate the orthodontic tooth movement while LLLT with a high dose was not able to have the same effect. LLLT had a reverse effect on relapse tendency; an increase in the relapse tendency was seen with low dose irradiation.


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How to Cite
Elkattan AE, Gheith M, Fayed MS, El Yazeed MA, Farrag A-RH, Khalil WKB. Effects of Different Parameters of Diode Laser on Acceleration of Orthodontic Tooth Movement and Its Effect on Relapse: An Experimental Animal Study. Open Access Maced J Med Sci [Internet]. 2019Feb.10 [cited 2021Jan.25];7(3):412-20. Available from: https://www.id-press.eu/mjms/article/view/oamjms.2019.089
D - Dental Sciences