Effect of laboratory and chairside polishing methods on the surface topography of occlusal splint materials manufactured using conventional, subtractive and additive digital technologies

Objective: This study evaluated the polishing properties of occlusal splint materials obtained using subtractive and additive manufacturing methods with laboratory-type (LP) chairside-type (CP) procedures. Material Methods: Specimens (N=180, n=60 each group) were manufactured one following methods: method (SMM) (M-PM Disc, Merz Dental GmbH), (AMM) (Freeprint Splint 2.0, DETAX GmbH & Co. KG), conventional (CMM) (Promolux HC, GmbH). Following LP CP procedures, surface roughness specimens was measured a digital profilometer. One representative specimen selected from group, scanning electron microscope (SEM) image made. Results: Both procedures significantly affected results (P<0.01). Interaction terms also significant (P<0.001). Conclusion: With both methods, AMM group highest CMM least. Although procedure more effective than below 0.2 micro m threshold after tested. KEYWORDS CAD-CAM, dental materials, splints, PMMA, properties.