... 2) join seamless 3) bending any design It is composed with MMA(methy methacrylate, materials mainly used for false teeth), natural ... minerals, pigmeng and so on. Excluding UPR(unsaturated polyester resin) and with high weatherability and mechanical performance, it is of higher rigidity ... 120#, 240#, 400# to 600, then clean the surface with tooth-paste.4Incised wound and scratch: a reference from the ...