Abstract
Background. Diode lasers (DLs) have demonstrated equal or better desensitizing effects than fluoride varnish, 10% potas-sium nitrate (NK) gel and Gluma. The current study evaluated the desensitizing effect of combined application of DLs with two different output powers and compared it with single DL therapy. Methods. Sixty-two hypersensitive teeth were allocated randomly into two groups: the single group was treated with 3-W DL beam once and in the combined group, the teeth were irradiated three times (the first time with 0.2-W and then with 3-W and the second and third times, 48 and 96 hours after the baseline visit, with 0.2-W DL beams). The amount of dentin hyper-sensitivity (DH) was evaluated, immediately before and after each visit, and 1 week and 1 and 3 months after the first visit. Data analysis was performed using chi-squared test, repeated measurement of ANOVA and Mann-Whitney U test. P<0.05 was considered statistically significant. Results. Statistically significant changes were observed in the means of VAS indices between all the measurement intervals and pretreatment measures, in both experimental groups (P<0.001). The difference in VAS reduction among the groups was not significant when the hypersensitive teeth were stimulated by a periodontal probe and a jet of air (P=0.63 and P=0.12). Conclusion. The results of the present study showed that using both high-intensity and combined DL beams gives rise to significant reductions in DH. There was no significant difference between combined and single laser therapies in the treatment of tooth hypersensitivity.
Highlights
Dentin hypersensitivity (DH) is a frequently occurring annoying condition amongst 30‒40year-old individuals.[1]
The results of the present study showed that using both high-intensity and combined Diode lasers (DLs) beams gives rise to significant reductions in DH
The efficiency of DLs in DH management has been reported in various studies,[10,11,12,13,14,15,25] prior to the current study, there is no published data on the efficacy of combined application of
Summary
Dentin hypersensitivity (DH) is a frequently occurring annoying condition amongst 30‒40year-old individuals.[1]. Gomi et al[16] reported a 100% success rate for desensitizing effect of DL and long-term reduction of DH has been shown by Wilder-Smith et al, Pinheiro et al and Marsilio et al.[17,18,19] When testing DLs at distinct wavelengths, Almeida Lopes et al[20] observed that the effect of lasers on cell growth depended on the output power and it was not related to the wavelength Another investigation revealed that 980-nm diode laser can block the dentinal tubules entirely, regardless of the output powers of 2, 3 and 4 Ws.[21] In a recent in vitro study, when applying a 980-nm diode laser beam with 0.5-, 0.7- and 1-W output powers, Rizzante et al demonstrated a greater reduction in dentin hydraulic conductance, as the irradiation power increased.[22] It seems that lasers with different ranges of output powers affect DH by two different mechanisms: highpower lasers by melting and fusing the peritubular dentin and low-power lasers by antiinflammatory effects and increasing the cellular metabolic activity of odontoblasts.[23,24] the efficiency of DLs in DH management has been reported in various studies,[10,11,12,13,14,15,25] prior to the current study, there is no published data on the efficacy of combined application of DLs with two different output powers in order to apply both mechanisms in the treatment of DH. The current study evaluated the desensitizing effect of combined application of DLs with two different output powers and compared it with single DL therapy
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callMore From: Journal of dental research, dental clinics, dental prospects
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
