Active compounds and derivatives of camellia sinensis responding to erosive attacks on dentin

Abstract

This research explored the potential of Camellia sinensis-derived teas and active compounds to be used as treatments to prevent dentin wear. Human root dentin slabs were randomly assigned to 5 groups (n = 10) as follows: distilled water (DW, control), epigallocatechin-3-gallate (EGCG), theaflavin gallate derivatives (TF), commercial green tea (GT), and commercial black tea (BT). The samples were submitted to a pellicle formation and an erosive cycling model (5x/day, demineralization using 0.01 M hydrochloric acid/60 s) followed by remineralization (human stimulated saliva/60 min) for three days. The samples were treated for 5 min using the test group solutions between the erosive cycles. Dentin changes were assessed with profilometry analysis and FT-Raman spectroscopy. The data regarding wear were analyzed by ANOVA followed by Tukey's test (p < 0.05). EGCG, TF derivatives, and both regular teas significantly suppressed erosive dentin loss (38-47%, p < 0.05). No obvious changes in the Raman spectra were detected in the specimens; however, the DW group had a minor relationship of 2880/2940 cm-1. The phenolic contents in both green and black tea and the important catechins appear to have protective effects on dentin loss.

Effect of Different Anticollagenolytic Agents on Dentin Erosion before and After Casein Phospho Peptides-Amorphous Calcium Fluoride Phosphate Application

“…A carbon pencil was used to mark a horizontal small window on the cervical coronal part of each specimen. Each specimen was coated with two layers of dark color acid resistant nail varnish except for the exposed window (3×3 mm) for application of tested materials (9)(10)(11) . Baseline surface microhardness of the dentine specimen was recorded by using Vicker's microhardness tester (12,13) .…”

“…The specimens were randomly assigned to two equal groups (20 premolars each) as follows (A 1 ): Aloe vera (A 2 ): Chlorhexidine. Dentine specimens in each group had been soaked in a glass container filled with 100ml of each testing solutions under constant agitation at room temperature (10,17) for one minute (12,18) . The specimens were rinsed and kept in de-ionized water at 37°C for next day.…”

Spectroscopic and microscopic examination of teeth exposed to green tea at different temperatures

“…Tea protects teeth against erosive demineralization [3][4][5][6][7]9] because the chemical structure of hydroxyapatite (HA), which comprises enamel, is tolerant to substitution by different trace elements [51,52]. Reports using liquid solutions [53,54] have shown that Zn, Ca, Mg, Fe, K, and Cu, which are found in tea, are involved in tooth staining.…”

“…Tea is one of the most popular drinks consumed worldwide, especially in China [1,2]. It has been widely reported that green tea extracts protect dental tissues [3][4][5][6]. For example, green-tea protects against dentin erosion and abrasion [3,5,7], periodontal diseases [8], and caries [9].…”

The Effects of an Experimental Green Tea Extract Gel on the Surface Roughness of Bleached Teeth with Carbamide Peroxide Gels

“…Green tea leaves also contain caffeine, theanine, micricetin, quercetin and kaempferol, all of which are part of the alkaloid group. The varied chemical composition of green tea has been explored in different biomedical fields, with an accent on the antioxidant, anticancer and anti-inflammatory potential of EGCG [10][11][12][13]. The EGCG structure includes a benzenediol ring attached to a tetrahydropyran fraction, a pyrogalol ring and a galloyl group (with the pyrogalol ring) [14,15].…”