Basic Study on Prosthetic Clinical Application of Polyethersulfone Resin Part II

Abstract

Astudy was made on the effect of cooling methods on deformation occurring immedi − ately after molding of polyethersulfone resin (PES)，adenture base materiaL The results were as follows ： 1． In comparison with heat curing acrylic resin ， considerable deformation was pro − duced in PES molded by routin methods ． 2 ． Gradual cooling of PES starting from the temperature for softening after com − pression molding restrained deformatiQn ． 3． Keeping PES for about 30 minutes at the temperature for softening after com − pression molding restrained deformation ． 4 ． Keeping PES for about 30 minutes at the temperature for softening and gradual cooling thereafter restrained deformation most effectively ， Key word8 ： PE3 ／ Denture base material ／ D

Application of noble metal cluster to PMMA resin and influence on mechanical properties and color

“…Regarding this disadvantage, although improvement of shock resistance and tensile and bending strengths has been attempted using crosslinking monomers 10) , no marked effects have been achieved. Furthermore, although engineering plastics such as polysulfone resin 11,12) and polyether sulfone resin, whose physical properties are superior to those of PMMA, have been used as denture base materials 13) , they are not widely used for general dental treatment, not only because they require large apparatuses such as injection and compression molding machines, and specific instruments, but also their molding method differs somewhat from conventional dental laboratory techniques 14,15) . Therefore, the dough forming technique with PMMA is most widely used.…”