Date of Award

Fall 2011

Document Type


Degree Name

Master of Science (MS)


Dental Hygiene


Dental Hygiene

Committee Director

Gayle McCombs

Committee Member

Margaret Lemaster

Committee Member

Mounir Laroussi

Call Number for Print

Special Collections LD4331.D46 C52 2011


Low temperature atmospheric pressure plasma (LT APP) is a novel science being studied as an alternative light source to enhance tooth whitening. The safety and effectiveness of LTAPP has not been established therefore; the purpose of this study was to determine if LTAPP along with H2O2 gel would safely and effectively accelerate the tooth whitening process, in terms of lightness and temperature. Two treatment groups were utilized: 36% H2O2 gel only and 36% H2O2 gel plus LT APP. Control group received no treatment. Experimental teeth were exposed to LT APP at various time intervals ( 10, 15, and 20 minutes). Temperature was measured throughout the treatment. Pre and post photographs were taken to compare color using the CIE L* a* b* system. Only L* (lightness) values were measured. Data were analyzed using descriptive statistics and t-test at the .05 level. There was a statistically significant difference in mean CIEL* values after exposing teeth to LTAPP plus H2O2 gel versus H2O2 gel only, in the 10 minute group (p-value of .0003) and 20 minute group (p-value of .0103). There was no statistically significant difference in mean CIE L* values among the 15 minute group (p-value of .3815). The temperature in both groups remained under 80°F throughout the study, which is below the thermal threat for vital tooth bleaching. Results indicate that LTAPP + H2O2 mean CIE L* values in the 10 and 20 minute groups were significantly greater than the H2O2 only groups. However, the mean CIE L* values for 15 minute group were not significant.


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