Method: An examiner blind, parallel group, randomized and controlled clinical study of 40 healthy adults with stain on their healthy anterior teeth. Following baseline examination, subjects were randomly assigned to one of the two treatment groups based on baseline shade scores, smoking status, tea/coffee consumption, and age. Clinical examinations including Vita Shade Score, VAS Sensitivity and Loe/Sillness Gingival Index were conducted at BL, and each subsequent day for 7 days. Calibrated examiners performed evaluations. All statistical analyses were conducted using a level of significance of p < 0.05.
Result: Swabs system subjects system demonstrated statistically significant results after the first use (2.42 Shades ± 0.68; p=0.036) compared to baseline. Strips subjects experienced barely any measurable whitening result after the first use (0.45 Shades ± 0.28; p=0.382). After seven days of use, the mean shade score for the swabs group was 6.45 shades (± 1.31); the mean score for the strips group was 5.13 shades (± 1.68). We found that there were no ill effects caused by the use of any of the products. Additionally the swabs system subjects experienced statistically significant less gum irritation and teeth sensitivity than the control whitening strips (p<0.05). Overall we found that swab system subjects experienced a mean 41% reduction of stain index score over 7 days in this study.
Conclusion: The liquid-swab teeth whitening system was able to achieve clinically and statistically significant stain removal and whitening results. Additionally the whitening results were statistically better than the strips system after the first day of the study. The swabs system subjects also experienced no adverse effects and had significantly less gum irritations and teeth sensitivity.