title: Influence of ceramic surface texture on the wear of gold alloy and heat-pressed ceramics.
abstract: The purpose of this study was to evaluate the influence of ceramic surface texture on the wear of rounded rod specimens. Plate specimens were fabricated from zirconia (ZrO2), feldspathic porcelain, and lithium disilicate glass ceramics (LDG ceramics). Plate surfaces were either ground or polished. Rounded rod specimens with a 2.0-mm-diameter were fabricated from type 4 gold alloy and heat-pressed ceramics (HP ceramics). Wear testing was performed by means of a wear testing apparatus under 5,000 reciprocal strokes of the rod specimen with 5.9 N vertical loading. The results were statistically analyzed with a non-parametric procedure. The gold alloy showed the maximal height loss (90.0 µm) when the rod specimen was abraded with ground porcelain, whereas the HP ceramics exhibited maximal height loss (49.8 µm) when the rod specimen was abraded with ground zirconia. There was a strong correlation between height loss of the rod and surface roughness of the underlying plates, for both the gold alloy and HP ceramics.
authors.affiliation: Division of Applied Oral Sciences, Nihon University Graduate School of Dentistry.
authors.forename: Osamu
authors.initials: O
authors.lastname: Saiki
authors.forename: Hiroyasu
authors.initials: H
authors.lastname: Koizumi
authors.forename: Hiroshi
authors.initials: H
authors.lastname: Nogawa
authors.forename: Haruto
authors.initials: H
authors.lastname: Hiraba
authors.forename: Nobutaka
authors.initials: N
authors.lastname: Akazawa
authors.forename: Hideo
authors.initials: H
authors.lastname: Matsumura
mesh_terms: D000538:Aluminum Silicates / Q000737:chemistry; D002516:Ceramics / Q000737:chemistry*; D003775:Dental Polishing; D003776:Dental Porcelain / Q000737:chemistry; D019554:Dental Restoration Wear; D003799:Dental Stress Analysis; D006047:Gold Alloys / Q000737:chemistry*; D006358:Hot Temperature; D008422:Materials Testing; D017680:Potassium Compounds / Q000737:chemistry; D013499:Surface Properties; D015040:Zirconium / Q000737:chemistry
chemical_list: D000538:Aluminum Silicates; D006047:Gold Alloys; D017680:Potassium Compounds; C493120:lithia disilicate; D003776:Dental Porcelain; C016447:feldspar; D015040:Zirconium; C028541:zirconium oxide