Abstract
Sports drinks are an effective means of rapidly replenishing fluids and nutrients, such as electrolytes, lost during exercise. However, the frequent consumption of sports drinks lowers oral pH, and the subsequent use of a sports mouthguard （SMG） reduces saliva contact with the tooth surfaces, decreasing acid buffering capacity and potentially increasing the risk of dental caries. Wearing an SMG is essential for safety and comfort in sports, as it prevents or mitigates damage to the teeth and oral mucosa and reduces the risk of concussion. This study aimed to investigate the acid buffering capacity of sports mouthguards containing surface pre-reacted glass-ionomer （S-PRG） filler （S-SMGs）. The study included 11 rugby players. Tooth surface pH was measured after the consumption of a sports drink under three conditions: without an SMG, with an SMG, and with an S-SMG. There was no significant difference between the control group and the S-SMG group; however, a significant difference was observed between the control group and the SMG group, indicating that the SMG delayed pH recovery. The findings of this study suggest that the S-SMG is suitable for situations involving the consumption of sports drinks.
