A review.Nissin and Kyoto Municipal Institute of Industrial Technol. and Culture, which manufacture and distribute dental material, dental cast and goods related to dentistry, have developed new denture base material having good elastic property, shape accuracy and repairing capability by using polyester copolymer.In addition to the characteristics of denture base material also has excellent sensuousness and it also facilitates recovery of psychol. state of the patients who have lost their teeth.