Abstract
This study evaluated the effect of Euclea natalensis gel on the reduction of erosive wear with or without abrasion, in enamel and dentin. During two five-day experimental crossover phases, volunteers (n = 10) wore palatal devices containing human enamel and dentin blocks (E = 8 and D = 8). The gel was applied in a thin layer in the experimental group, and was not applied in the control group. In the intraoral phase, volunteers used the palatal appliance for 12 h before the gel treatment, and were instructed to start the erosive challenges 6 h after the gel application. Erosion was performed with Coca-Cola® (for 5 min) 4 times/day. The appliance was then put back into the mouth and was brushed after 30 minutes. After intraoral exposure, the appliances were removed and the specimens were analyzed using profilometry (mean ± SD, μm). The Euclea natalensis gel caused less wear in enamel in the experimental group (EROS = 12.86 ± 1.75 µm; EROS + ABRAS = 12.13 ± 2.12 µm) than in the control group (EROS = 14.12 ± 7.66 µm; EROS + ABRAS = 16.29 ± 10.72 µm); however, the groups did not differ from each other significantly. A statistically significant value was found for erosion and eros + abrasion in dentin (p = 0.001). Euclea natalensis may play a role in the prevention of dentin loss under mild erosive and abrasive conditions. A clinical trial is required to confirm these promising results in a clinical situation.
Highlights
Dental wear is a known multifactorial condition that may represent an association of erosion, abrasion, attrition and abfraction
The best preventive effect was observed for the dentin under the experimental conditions of erosive (5.81 ± 1.00 μm) or erosive+abrasion (6.16 ± 1.00 μm) challenges, which yielded a significantly lower mean wear than that observed for the control group (p < 0.05)
In the present in situ study, there was no significant difference between the experimental group using Euclea natalensis gel and the control group, in relation to the enamel (p > 0.05), and a significant difference in relation to dentin erosive wear (p < 0.05), which may be attributed to the difference in enamel and dentin composition, and which may interfere in the erosive process
Summary
Dental wear is a known multifactorial condition that may represent an association of erosion, abrasion, attrition and abfraction. Acidic foods are consumed worldwide;[1] their effects on the mouth are universally assumed to be harmless. Acidic beverages and foods can affect natural teeth, and chronic exposure often leads to the development of dental wear.[2] The most recognized cause of abrasion is brushing, in which the type of toothpaste and brush are responsible, but poor technique and excessive brushing force (after acid challenge) may act as aggravating factors. Erosive and abrasive processes are frequently observed, and are often associated, because abrasion of the dental hard tissue is considerably aggravated by exposure to acids (erosion).[3] Efforts have been made to elucidate how erosive/abrasive lesions may be prevented.[4]
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