Comparison of green tea [TWININGS®] and matcha tea [now Real Tea®] effect on re-mineralization of artificially- Induced initial enamel caries of human teeth: Study 𝑖𝑛 𝑣𝑖𝑡𝑟𝑜

Decay can develop at any point throughout lifetime. Matcha tea contains significant amounts of minerals; it had the highest concentration of fluoride among other types of tea. This in vitro study aimed to compare the effect of green tea and matcha on re-mineralizing enamel caries-like lesions. In this in vitro study, forty intact premolar teeth [extracted for orthodontic treatment] were collected; acrylic resin was poured into sliced plastic rings. In the middle of the ring, teeth crowns were placed, with the labial surface visible. A 4x4 mm window was prepared for measurements. Samples were placed into tubes contains 20 mL of de-mineralizing solution for 72 hours to produce demineralization. Afterwards, they were randomly separated into four categories. Group 1: Deionized water, Group 2: Sodium fluoride solution, Group 3: matcha solution; and Group 4: green tea solution; ten teeth in each group. Samples were soaked in 20 mL of the tested solution for four minutes. The processes were performed daily for one week. Samples were evaluated using a Vicker hardness testing machine. A significant difference was found between baselines followed by after treatment [p 0.05] except with de-ionized water. A non-significant difference was found between the tested group: green tea was showing the highest mean value [107.101], followed by matcha [104.213] and sodium fluoride [92.524]. A significant difference was found when compared these groups with deionized water. There was no significant difference between matcha and green tea.