4 research outputs found
Role of desensitizing/whitening dentifrices in enamel wear.
OBJECTIVES
To analyze the impact of desensitizing (D) and/or whitening (W) dentifrices on erosion and erosion-abrasion.
METHODS
Enamel specimens were allocated into 10 groups (nâŻ=âŻ20): 1. Artificial saliva (control); 2. Sensodyne Repair&Protect (SRP-D); 3. Sensodyne Repair&Protect Whitening (SRP-W); 4. Colgate Sensitive Pro-Relief (CSPR-D); 5. Colgate Sensitive Pro-Relief Real White (CSPRR-W); 6. Colgate Total 12 (CT); 7. Colgate Total 12 Professional Whitening (CTP-W); 8. Sensodyne True White (ST-W); 9. Curaprox Black is White (CB-W); 10. Oral-B 3D White Perfection (OB3D-W). For abrasion (nâŻ=âŻ10), 30,000 brushing strokes were performed and surface roughness (SR) was evaluated. Erosion-abrasion (nâŻ=âŻ10) consisted of 1 % citric acid (2âŻmin), artificial saliva (60âŻmin); 6Ă/day; 5 days. Toothbrushing was carried out 2Ă/day (45 strokes). Surface loss (SL) was determined with an optical profilometer. Data were statistically analyzed (αâŻ=âŻ0.05).
RESULTS
Relative to SR, only OB3D-W had a significantly rougher surface than the control (pâŻ=âŻ0.014). SRP-D, CSPR-D and ST-W showed no difference from the baseline. High SL was observed for ST-W, OB3D-W and CTP-W, without significant differences from the control. CT showed the lowest SL, not differing from SRP-D and SRP-W. There was a weak negative correlation between SL and concentration of free fluoride in the slurries, SL and SR, and SL and pH, all pâŻ>âŻ0.05.
CONCLUSIONS
Only one dentifrice increased surface roughness of enamel to a higher degree than brushing with saliva. Brushing with the test dentifrices did not cause higher enamel erosive wear than brushing with saliva.
CLINICAL SIGNIFICANCE
This study enhances our knowledge on the effect of desensitizing and whitening dentifrices, indicating that they do not worsen enamel loss due to abrasion and they might be a safe option for individuals with erosive tooth wear
Impact of desensitizing/whitening toothpastes on tooth color change after abrasion and erosion-abrasion.
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 =â10): 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 (ÎE00 ), ÎL, Îa, and Îb were determined with a spectrophotometer. Data were statistically evaluated (α = 0.05).
RESULTS
For both models, âE00 of D did not differ significantly from DW. An overall decrease in luminosity (-âL) and increase (+âb) in yellowness of the tooth occurred. In abrasion, all groups reduced redness (-âa) and only SRP-DW differed from control (p =â0.016), but for âE00 , âL and âb, all toothpastes did not differ from the control. In erosion/abrasion, CB-W showed significantly lower âE00 and âb than the control (âE00 : p =â0.026; âb: p =â0.005) and SRP-D (âE00 : p =â0.028; âb: p =â0.025). Only SRP-DW, CSPR-DW, ST-W, CB-W, and erosion-only had increased redness (+âa), 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.
CLINICAL SIGNIFICANCE
Desensitizing and/or whitening toothpastes induced similar changes on tooth color, without promoting whitening effect or reduction in its yellowish aspect