[ in vitro comparative study on abrasive wear resistance and surface roughness of two ceromers: belleglass and gradia]

ABSTRACT

Statement of problem: Surface changes of ceromers caused by tooth brushing are well established, meanwhile they have been improved and are now widely used for various kinds of prosthetics restorations. These materials have lower surface hardness than porcelain and may induce discoloration due to surface roughness. Since it is an important clinical problem, more investigations are needed to evaluate their surface roughness