Stomatology ›› 2022, Vol. 42 ›› Issue (12): 1123-1128.doi: 10.13591/j.cnki.kqyx.2022.12.014

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Advances in low-level laser therapy for the acceleration of orthodontic tooth movement

DAI Jiayun, WANG Shujing, LIN Junyan, TIAN Yu, PAN Yongchu, LI Dandan   

  1. Jiangsu Province Key Laboratory of Oral Diseases, Nanjing 210029, China
  • Received:2022-05-15 Online:2022-12-28 Published:2022-12-28

Abstract: Previous studies indicated that low-level therapy (LLLT) may accelerate tooth movement. We review literature to summarize the clinical effect of LLLT on accelerating tooth movement and its biological mechanism. A majority of the studies believed that LLLT could accelerate orthodontic tooth movement. However, some studies believed that LLLT had no effect on the acceleration of orthodontic tooth movement. LLLT is characterized by low dose stimulation and high dose inhibition. Therefore, the difference may be related to parameters in its application. LLLT promotes the reconstruction of alveolar bone by photobiomodulation. Results of recent research have showed that the number of bone cells, local collagen content and the expression of inflammatory factors in periodontal tissues of the patients treated with LLLT were regulated, but the biological mechanism remains to be discovered by further research.

Key words: tooth movement, low-level laser therapy (LLLT), clinical effect, mechanism research

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