COMPARATIVE STUDY REGARDING SOURFACE ROUGHNESS OF DIFFERENT TYPES OF COMPOSITE RESINS AFTER FINISHING AND POLISHING METHODS AND GLAZE MATERIAL APPLICATION

Surface roughness is the major contributor for extrinsic discoloration of resin composite restorations. This property is closely related to the organic matrix, inorganic filler composition of the composite, and finishing and polishing procedures. Rough surface greater than 0.2 mu m provides higher chances of biofilm accumulation, leading to staining and/or discoloration of the restoration's body or margins. The purpose of the study was to compare the finishing and polishing technique of some composite resins with their sealing using a glaze material type, in terms of surface roughness. Materials and methods: 45 composite specimens were manufactured( ormocer-ADMIRA, nanohybrid - TETRIC EVOCERAM, nanocomposite - FILTEK ULTIMATE), and divided into 3 groups( n=15, control, polished and finished, and glaze material). Roughness(Ra) was messured before and after immersing in artificial saliva. For all composite resins the sourface roughness decreased after 90 days.