Background; Thoth loss is a problem that can affect chewwing function,speech function,interfere with the function of the temporomandibullar joint,and psycological ie eseasthetics.so as the improve the functionality needed denture base,usualy denture base material that is commonly used heat cured acrylic resin.the heat cured acrylic resin and contact with the drink is chemical subtances are citric acid,acetic acid,and the other can lead to crazing.this can affect the strength of the transverse heat cured acrylic resin