Effects of Diode Low-Level Laser Therapy (LLLT) of 810 Nm on Pulpal Anesthesia of Maxillary Premolars: A Double-Blind Randomized Clinical Trial

Abstract

Objective: The purpose of this study was to investigate the pulpal effect of diode low-level laser therapy (LLLT) of 810 nm on the alleviation of pain in patients requiring dental procedures. Methods: The current study was a double-blind randomized clinical trial carried out on twenty participants. The electric pulp testing (EPT) was recorded at baseline. Patients were randomly divided into sham laser and laser group respectively receiving low-level laser with placebo and active probes. Low-level laser at 810 nm, 200 MW constant power, 30s irradiation time and energy dose of 6 J was used. The electric pulp testing (EPT) method was again adopted to assess the rate of induced anesthesia. Laser and sham laser treatments were carried out in two different sessions with a one-week interval to ensure avoiding the potential false placebo results. Data were analyzed in SSPS-24 using Chi-square test and t-test. The p-value was set at 0.05. Results: A low-level laser at 810 nm significantly alleviate EPT-induced pain compared to the pain before laser irradiation (P≤0.001). While the difference of EPT-induced pain before and after sham laser irradiation was not significant in control group (P>0.05). There was no correlation between the anesthetic effects of a laser application at 810 nm and other variables including age and gender (P>0.05). Conclusion: An 810 nm low-level laser is a powerful device for induced anesthesia applications in patients requiring dental procedures. It also lessens the patients’ fear of dental procedures.

Evaluating the effectiveness of low-level laser therapy in reducing local anesthesia injection pain in children

“…While the current study agree with that of Sattayut, 2014 (790 nm, 2 minutes), Jagtap et al, 2019 (660 nm, 3 minutes) and Ghabraei, S., et al, 2020 (980 nm, 1 minute) in adults [16] [9] [17]. As well as, agree with the study of Shekarchi, F., et al, 2022 (808 nm, 1 minute), Uçar, G., Ü. Şermet Elbay, 2022 (810 nm, 20 seconds), and Seraj, Bavaghar et al 2023 (810 nm, 13 seconds) in children [15] [10] [14]. However, the difference in pain degree between laser group and control group was statistically signi cant in only two of those above-mentioned studies, in Jagtap et al, 2019 in adults and Uçar, G., Ü. Şermet Elbay, 2022 in children [9] [10], and it was statistically signi cant in our study as well.…”

“…Due to the analgesic effect of laser, researchers studied the effect of LLLT diode laser in reducing the injection pain associated with dental local anesthesia. Previous studies used different pain scales; either modi ed behavioral pain scale (MBPS) [14], or FACES Scale [15], or visual analog scale (VAS) [16] [9] [17] [14], or Face, Legs, Activity, Cry, Consolability (FLACC) scale [10]. In our study FACES Scale was adopted because it shows a close linear relationship with visual analogue pain scales for kids of age and older.…”

“…[10] [7] [8] Low-level laser therapy (LLLT) can offer tremendous therapeutic bene ts to patients, such as accelerated wound healing and pain relief [11]. Many research have reported that LLLT is able to control pain in different therapy in dentistry such as surgical and orthodontic treatment, besides it is e cacy in diminishing temporomandibular joint disorders pain [12] [13], or even in Pulpal anesthesia [14]. The exact mechanisms responsible for the apparent analgesic effect of LLLT are still unclear [15].…”