Research Advances on Effect of Photobiomodulation Therapy on Root Resorption in Orthodontic Treatment
Root resorption is one of the most dangerous complications during orthodontic treatment.Mild root re-sorption can be repaired after removing force.However,there is no effective measure for severe root resorption.Photobiomodulation therapy,as a new physical therapy,has the advantages of small size,non-invasion,wide wave-length,limited scope of action,and biological safety.The range of its wavelength covers the range of mitochondrial absorption wavelength,and the biological activity of tissues or cells changes after being irradiated by red or near-in-frared light,upregulating the anti-inflammatory and other related factors,promoting cellular ATP production,ac-celerating local blood microcirculation,promoting the repair of soft and hard tissues,and inhibiting or repairing re-sorbed tooth.The effect of photobiomodulation therapy depends on four elements,i.e.the parameter of the wave-length,energy density,power density,and irradiation frequency,obeying the"biphasic dose effect".Biological effi-cacy is parameter dependent,making it difficult to obtain optimal parameters.However,the unique advantages of photobiomodulation therapy make it have great application potential in the field of orthodontics.
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