Comparative Study of 660 and 830 nm Photobiomodulation in Promoting Orthodontic Tooth Movement

Abstract

Objective: Photobiomodulation (PBM) can usefully promote wound healing and relieve pain via its biological effects, with a wide range of applications in clinical medicine. The aim of the present study was to investigate the effect of 660 and 830 nm PBM on orthodontic tooth movement. Background data: PBM is based on the biological effects of diode laser irradiation on tissues, promoting cell proliferation and activity. Materials and methods: An orthodontic force was applied to the upper right first molars exposed to a 660 and 830 nm PBM (LHH-500I; Beijing Long Hui Heng Medical Science and Technology Development Corporation) on days 0, 1, 2, 3, 4, 5, and 7 for 50 sec with power density of 0.1 W/cm 2 (a beam area of 0.5 cm 2 , radiate power of 0.05 W), energy density of 5 J/cm 2 within 14 days, and a control group with no laser irradiation. Tooth movement was analyzed using a stereomicroscope, the number of osteoclasts determined by tartrate-resistant acid phosphatase (TRAP), and the expression of bone remodeling factors evaluated by immunohistochemistry. Results: The expression of IL-1b, RANKL, and OPG was significantly stimulated in the 660 and 830 nm groups. The expression of RANKL was significantly higher in the 660 nm group than in the 830 nm group on days 5 and 7; however, there was no significant difference in the expression of OPG and IL-1b between the 660 and 830 nm groups on days 1, 2, 3, 4, 5, 7, and 14. On days 3 and 5, the number of osteoclasts in the 660 nm group was higher than that in the 830 nm group, and the difference was statistically significant. Tooth movement over 14 days was significantly higher in the 660 and 830 nm groups than in the control group, and there was no significant difference between the 660 and 830 nm groups finally. Conclusions: Both 660 and 830 nm can accelerate the orthodontic tooth movement and promote alveolar bone remodeling on the compression side. Although the difference of tooth movement over 14 days between the two groups was not statistically significant; however, 660 nm PBM to accelerate bone remodeling is stronger than 830 nm PBM at an early stage.

Different Therapeutic Effects of CO2 and Diode Laser Irradiation on Tooth Movement-Related Pain

“…The ETM was measured to assess another effect of laser irradiation. Recently, a significant increase in tooth movement mediated by irradiation with 660 or 830 nm lasers was reported (47). Laser irradiation also significantly increased the expression of interleukin-1β (IL-1β), receptor activator of nuclear factor κ-B ligand (RANKL), and osteoprotegerin (OPG) and the activity of osteoclasts in a wavelength-dependent manner.…”

Effect of mini-screw-facilitated micro-osteoperforation on the rate of orthodontic tooth movement: a single-center, split-mouth, randomized, controlled trial

“…The increased demand for rapid orthodontic treatment has led to the introduction of several methods, which also reduce potential risks of dental and periodontal complications such as external apical root resorption, high levels of dental caries, and subsequent gingivitis and periodontitis [3][4][5]. Some of the proposed methods are adequate use of brackets, controlling force levels, and relying on less friction bracket systems, photobiomodulation, pharmacological approaches, or low-intensity laser irradiation [6][7][8][9][10][11]. However, irrespective of the method, the rate of the tooth movement is dictated by the biologic response to the applied orthodontic forces [2,12].…”

Predictability of Invisalign® Clear Aligners Using OrthoPulse®: A Retrospective Study

“…However, wavelengths between 700 nm and 850 nm deeply penetrate the tissues, with two peaks around 725 nm and 810 nm [ 46 ]. Other studies have shown that the wavelengths that deliver concrete orthodontic effects are 630 nm, 660 nm, 830 nm, and 850 nm [ 47 , 48 ]. The wavelength of the light, the thickness of the target tissue, and the degree of the keratinization and pigmentation of the oral mucosa may all have an impact on the depth of penetration.…”