Impact of desensitizing/whitening toothpastes on tooth color change after abrasion and erosion–abrasion

Abstract

Objective: To evaluate the impact of desensitizing toothpastes (D), their whitening versions (DW) and whitening toothpastes (W) on tooth color change. Methods: Tooth specimens were allocated into 11 groups (n = 10): 1. Artificial saliva (control); 2. Sensodyne Repair & Protect (SRP-D); 3. Sensodyne Repair & Protect Whitening (SRP-DW); 4. Colgate Sensitive Pro-Relief (CSPR-D); 5. Colgate Sensitive Pro-Relief Real White (CSPR-DW); 6. Colgate Total 12 (CT12); 7. Colgate Total 12 Whitening (CT12-W); 8. Sensodyne True White (ST-W); 9. Curaprox Black Is White (CB-W); 10.Oral-B 3D White Perfection (OB3D-W) and 11. Erosion-only. They were submitted to two models: A. abrasion; B. erosion/abrasion. Color change (ΔE 00 ), ΔL, Δa, and Δb were determined with a spectrophotometer. Data were statistically evaluated (α = 0.05).Results: For both models, ΔE 00 of D did not differ significantly from DW. An overall decrease in luminosity (ÀΔL) and increase (+Δb) in yellowness of the tooth occurred.In abrasion, all groups reduced redness (ÀΔa) and only SRP-DW differed from control (p = 0.016), but for ΔE 00 , ΔL and Δb, all toothpastes did not differ from the control.In erosion/abrasion, CB-W showed significantly lower ΔE 00 and Δb than the control (ΔE 00 : p = 0.026; Δb: p = 0.005) and SRP-D (ΔE 00 : p = 0.028; Δb: p = 0.025). Only SRP-DW, CSPR-DW, ST-W, CB-W, and erosion-only had increased redness (+Δa), but none differed from control. Conclusions:The toothpastes did neither promote whitening nor avoid the yellowish aspect of the tooth after abrasion and erosion-abrasion, regardless of their claim.