IADR Abstract Archives
Sensitivity and Bleaching Efficacy With Every Other Day Application
Objectives: To compare tooth sensitivity (TS) and bleaching efficacy of 16% carbamide peroxide applied daily or every other day for three weeks at home. Gingival irritation (GI) and the impact of oral condition on quality of life were also determined.
Methods: A randomized, parallel and double-blinded clinical trial was performed. Forty-two volunteers were randomly allocated into two groups: 1) Bleaching trays containing 16% carbamide peroxide gel (Whiteness Perfect, FGM, Brazil) were used daily 2) Bleaching trays were used every each other day. All patients were asked to bleach for two hours completing for three weeks of treatment. Patients self-reported the risk and intensity of TS and GI using a visual analogue scale. The color change (CIELab [ΔE*ab], CIEDE00 [ΔE00], and whiteness index [ΔWID]) were assessed using a spectrophotometer and with Vita Classical and Vita Bleachedguide 3D-MASTER guides (ΔSGU) at baseline, and after one, two and three weeks of bleaching. The impact of oral condition on quality of life was assessed using the Oral Health Impact Profile (OHIP-14). Absolute TS and GI risk were analyzed by Fisher exact test, intensity of GI, TS and color assessments by Student t-test, and OHIP-14 by paired t-test (p<0.05).
Results: The intensity of TS was similar for both experimental groups after one, two and three weeks of treatment, with an absolute risk higher than 80%. A significant and similar whitening effect was determined for every other day application and the daily use, for all the color parameters tested. No differences were detected regarding GI. However, an improvement in quality of life was observed for every other day regime.
Conclusions: Although every other day application of at-home bleaching with 16% carbamide peroxide produced similar TS, bleaching efficacy, and GI than a daily regime, the improvement on the quality of life was significant.
Methods: A randomized, parallel and double-blinded clinical trial was performed. Forty-two volunteers were randomly allocated into two groups: 1) Bleaching trays containing 16% carbamide peroxide gel (Whiteness Perfect, FGM, Brazil) were used daily 2) Bleaching trays were used every each other day. All patients were asked to bleach for two hours completing for three weeks of treatment. Patients self-reported the risk and intensity of TS and GI using a visual analogue scale. The color change (CIELab [ΔE*ab], CIEDE00 [ΔE00], and whiteness index [ΔWID]) were assessed using a spectrophotometer and with Vita Classical and Vita Bleachedguide 3D-MASTER guides (ΔSGU) at baseline, and after one, two and three weeks of bleaching. The impact of oral condition on quality of life was assessed using the Oral Health Impact Profile (OHIP-14). Absolute TS and GI risk were analyzed by Fisher exact test, intensity of GI, TS and color assessments by Student t-test, and OHIP-14 by paired t-test (p<0.05).
Results: The intensity of TS was similar for both experimental groups after one, two and three weeks of treatment, with an absolute risk higher than 80%. A significant and similar whitening effect was determined for every other day application and the daily use, for all the color parameters tested. No differences were detected regarding GI. However, an improvement in quality of life was observed for every other day regime.
Conclusions: Although every other day application of at-home bleaching with 16% carbamide peroxide produced similar TS, bleaching efficacy, and GI than a daily regime, the improvement on the quality of life was significant.