Effect of Nano-Pulsed Cold Laser (NPCL) Light on Calcium and Phosphate Loss from Dental Enamel During In-office Bleaching with High Concentrated Hydrogen Peroxide Using Atomic Absorption Spectophotometer

Ahangar, Fayaz Ahmed; Sajad, Mohd; Nabi, Shahnaz; Bhat, Shabir; Rashid, Aamir; Farooq, Riyaz

To assess calcium and phosphate loss from enamel using 37.5% hydrogen peroxide (HP) gel with additional application of light emitting diode (LED), Diode laser and Nano-Pulsed Cold laser (NPCL) light sources compared to that of 37.5% HP alone using atomic absorption spectrophotometer (AAS).

Methods:

Twenty teeth were sectioned to obtain mesiobuccal, distobuccal, mesiopalatal and distopalatal specimens. The specimens were randomly assigned to four equal groups. 37.5% HP of 1mm thickness was applied to the enamel surface of each specimen. Each group received three cycles of bleaching of 8 minute’s duration. Group II, III & IV received additional application of LED, Diode laser & cold laser light respectively.

Results:

Data was analyzed by means of descriptive statistics. Group III showed the maximum loss of ions while Group IV showed the least loss and the differences were statistically significant (P < .05).

Conclusion:

Teeth treated with 37.5% hydrogen peroxide with application of Nano-Pulsed Cold Laser (NPCL) light presented with significantly minimal calcium and phosphate loss

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