Objective: The purpose of this clinical research was to determine whether a dual-syringe, 16% carbamide peroxide equivalent (CPE), amorphous calcium phosphate (ACP)-containing bleaching gel could have an effect on enamel surface smoothness and gloss. Methods: 10 healthy adults who met the inclusion / exclusion criterion wore a custom tray containing the test ACP-gel for a minimum of 3 hours daily (or overnight) for 2 weeks. Evaluations of tooth color, surface roughness and gloss were made at baseline,1-week, 2-weeks and +5 days post-treatment. The surface gloss index (SGI) and surface roughness index (SRI) measurements were performed by a single, experienced examiner who evaluated anterior teeth (#6 - #11). The SGI utilized a six-point subjective scale and the SRI used a four-point scale. For the tooth color evaluation, a 16-point Vita(tm) shade score index was used. Results: Compared to the baseline control values, the ACP gel showed a significant (T-test, P < 0.01) longitudinal percent improvement in tooth surface gloss and roughness at 1-week (SGI = 10.1% ; SRI = 6.15%) and 2-weeks (SGI = 22.4% ; SRI = 15.4%).Tooth color was also improved significantly compared to baseline, reaching a maximum shade change of 8.13 +/- 1.02 units at day 14 (T-test, P < 0.0001). At the +5 post treatment day evaluation, no significant changes in tooth color, SGI or SRI were found compared to day 14 results (T-test, P < 0.001). Conclusions: The dual-chambered 16% CPE ACP-containing bleaching gel is efficacious for enhancing tooth surface smoothness, gloss and whiteness. These improvements did not diminish 5 days after the treatment had ceased. Further 30-day and 180-day follow-up evaluations are planned.

Research funded by Discus Dental Inc.

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