Lin, Qiaolin et al1 compared the clinical therapeutic effects of sodium hypochlorite combined with Nd: YAG laser and sodium hypochlorite alone for root canal disinfection in patients with pulpitis. They found that compared with root canal irrigation with 1% sodium hypochlorite alone, sodium hypochlorite combined with Nd: YAG laser for root canal disinfection can significantly improve the therapeutic effect, relieve inflammatory reaction, and decrease bacterial infection.
Carvalho, Fernando Rodrigues and coworkers2 assessed the effect of PBMT immediately after irradiation on TMDs symptoms under a prospective clinical trial, randomized, triple-blinded, placebo-controlled, and with two parallel arms. The results showed a reduction in the total pain score (p = 0.026), a reduction in the number of painful points (p = 0.013), and an increase in the MMO (p = 0.016) in the PBMT protocol group when compared to the placebo protocol (sham-PBMT). The PBMT was shown to be effective in reducing orofacial/cervical skull pain immediately after the irradiation. It is clinically relevant and should be taken into consideration by professionals who are dedicated to treating this pathology because, in addition to bringing comfort to patients who need dental treatment, it also consists of a low-cost and low technical complexity clinical approach.
Karatas et al3 investigated the effect of erbium, chromium: yttrium-scandium-gallium-garnet (Er,Cr:YSGG) laser conditioning on dentin bond srength and nanoleakage of different universal and self-etch adhesives. They concluded that Irradiation of the dentin surface with Er,Cr:YSGG could adversely affect the TBS and nanoleakage, likely by affecting the structure of the hybrid layer.
Li Zhen and coworkers4 published a paper which assessed the effects of different application sequences of neodymium-doped yttrium aluminum garnet (Nd∶YAG) laser and the desensitizing toothpaste containing stannous fluoride on dentinal tubule occlusion. They concluded that Nd∶YAG laser irradiation with appropriate parameters combined with the use of desensitizing toothpaste could produce an excellent occluding effect on dentinal tubules .
Rapp and coworkers5 investigated the effect of femtosecond (fs) laser ablation of enamel and dentin for different pulse wavelengths: infrared (1030 nm), green (515 nm), and ultra-violet (343 nm) and for different pulse separations to determine the optimal irradiation conditions for the precise removal of dental hard tissues with the absence of structural and compositional damage. They found that Ultra-violet irradiation significantly increased the internal temperature of the teeth, well above the acceptable limit, and caused severe damage to tooth structures. Thus, ultra-violet is not a compatible laser wavelength for femtosecond teeth ablation.
AlFawaz 6 published a systematic review aimed to evaluate the adhesive bond strength of restorative materials to caries-affected dentin treated with antimicrobial photodynamic therapy in comparison with conventional chemical disinfectants. The finding was that adhesive bond strength of restorative materials to CAD treated with conventional chemical disinfectants showed superior outcomes compared to photodynamic therapy.
Chamani et al7 investigated the therapeutic or placebo effect of LLLT for TMD and compared it with standard treatment methods. They found that it cannot replace standard treatment alone.
References
Carvalho, Fernando Rodrigues; Barros, Rafael Queiroz; (...); Freitas, Patricia Moreira. Photobiomodulation Therapy on the Palliative Care of Temporomandibular Disorder and Orofacial/Cervical Skull Pain: Preliminary Results from a Randomized Controlled Clinical Trial. Healthcare (Basel, Switzerland) 11 (18). 2023-09-18.
Li, Zhen; Zhao, Ji-Zhi; (...); Yang, Wen-DongEffect of Neodymium-Doped Yttrium Aluminum Garnet Laser Combined With Desensitizing Toothpaste on Dentinal Tubule Occlusion Against Acid Challenge]. Acta Academiae Medicinae Sinicae 45 (5) , pp.809-813. Zhongguo yi xue ke xue yuan xue bao 2023-oct.
Rapp, Ludovic; Madden, Steve; (...); Rode, Andrei V. | Investigation of laser wavelength effect on the ablation of enamel and dentin using femtosecond laser pulses. Scientific reports 13 (1) , pp.20156. 2023-11-17.
AlFawaz, Yasser F. Adhesive Bond Strength of Restorative Materials to Caries-Affected Dentin Treated with Antimicrobial Photodynamic Therapy: A Systematic Review and Meta-Analysis. Photobiomodulation, photomediciene and Laser surgery. 2023-nov-21.
Chamani, Goli; Zarei, Mohammad Reza; (...); Mafi, Sahar. Comparison of low-level laser therapy and standard treatment for temporomandibular disorders. An assessment of therapeutic and placebo effects. Journal of Oral Rehabilitation. 2023-nov-27.