Mizuhashi F, et al. - Investigators estimated the data to quantify the influence of using a notched mouthguard sheet and forming as the heated surface of the sheet contacts the surface of the working model. They used a 3.8-mm-thick Sports Mouthguard. They observed variations in the thickness of the mouthguard by the measurement parts and the sheet conditions whereas the notched sheet maintained the necessary thickness. The sheets formed as the heated surface contacted the working model presented a better fit. They noticed a variation in fit between the measurement parts and the sheet conditions. They suggested that the ideal mouthguard with proper thickness and suitable fit could be fabricated by notching a sheet and contacting the heated surface of the sheet to the working model.