title: The effects of extraoral porcelain polishing sequences on surface roughness and color of feldspathic porcelain.
abstract: The aim of this study was to evaluate the surface properties and color of porcelain modified by extraoral polishing sequences. Six different surface treatment regimens (diamond burs, self-glaze, overglaze, reglaze, Pearl Surface polishing system, and Diamond Twist SCL) were applied to 60 porcelain disks (n = 10 per group). Profilometry and atomic force microscopy (AFM) were used for the determination of surface roughness (Ra); color changes (deltaE*) were investigated by spectrophotometry. Statistical comparisons were made using analysis of variance, the Kruskal-Wallis test, and the Pearson correlation coefficient test. Surface treatments significantly affected Ra values (P < .001) but had no effect on color (P > .05). AFM findings were consistent with Ra values. Color did not appear to be correlated with surface roughness (P > .05). The findings concluded that the Pearl Surface system helps to decrease chairside time and may be used as an alternative to overglazing.
authors.affiliation: Department of Prosthodontics, Faculty of Dentistry, Baskent University, Ankara, Turkey. bulemy@gmail.com
authors.forename: Bulem
authors.initials: B
authors.lastname: Yuzugullu
authors.forename: Cigdem
authors.initials: C
authors.lastname: Celik
authors.forename: Selim
authors.initials: S
authors.lastname: Erkut
authors.forename: Tuncer Burak
authors.initials: TB
authors.lastname: Ozcelik
mesh_terms: D000538:Aluminum Silicates / Q000737:chemistry*; D003116:Color; D003775:Dental Polishing / Q000295:instrumentation / Q000379:methods*; D003776:Dental Porcelain / Q000737:chemistry*; D018130:Diamond / Q000737:chemistry; D006358:Hot Temperature; D006801:Humans; D021621:Imaging, Three-Dimensional; D008422:Materials Testing; D018625:Microscopy, Atomic Force; D017680:Potassium Compounds / Q000737:chemistry*; D013053:Spectrophotometry; D013499:Surface Properties
chemical_list: D000538:Aluminum Silicates; D017680:Potassium Compounds; D003776:Dental Porcelain; C016447:feldspar; D018130:Diamond