title: Effects of sandblasting and electrical discharge machining on porcelain adherence to cast and machined commercially pure titanium.
abstract: The aim of this study was to determine the effect of sandblasting and electrical discharge machining (EDM) on cast and machined titanium surfaces and titanium-porcelain adhesion. Twenty machined titanium specimens were prepared by manufacturer (groups 1 and 2). Thirty specimens were prepared with autopolymerizing acrylic resin. Twenty of these specimens (groups 3 and 4) were cast with commercially pure titanium and the alpha-case layer was removed. For control group (group 5), 10 specimens were cast by using NiCr alloy. Groups 2 and 4 were subjected to EDM while groups 1, 3, and 5 were subjected to sandblasting. Surface examinations were made by using a scanning electron microscope (SEM). A low-fusing porcelain was fused on the titanium surfaces, whereas NiCr specimens were covered using a conventional porcelain. Titanium-porcelain adhesion was characterized by a 3-point bending test. Results were analyzed by Kruskal-Wallis and Mann-Whitney U tests. Metal-porcelain interfaces were characterized by SEM. The bond strength of control group was higher than that of the titanium-porcelain system. There was no significant difference between cast and machined titanium groups (p > 0.05). There was no significant difference between EDM and sandblasting processes (p > 0.05). The use of EDM as surface treatment did not improve titanium-porcelain adhesion compared with sandblasting.
authors.affiliation: Department of Prosthodontics, Faculty of Dentistry, University of Selcuk, Konya, Türkiye, Turkey.
authors.forename: Ozgür
authors.initials: O
authors.lastname: Inan
authors.forename: Asli
authors.initials: A
authors.lastname: Acar
authors.forename: Selçuk
authors.initials: S
authors.lastname: Halkaci
mesh_terms: D000180:Acrylic Resins; D003776:Dental Porcelain / Q000737:chemistry; D003799:Dental Stress Analysis; D008855:Microscopy, Electron, Scanning; D013499:Surface Properties; D014025:Titanium
chemical_list: D000180:Acrylic Resins; D003776:Dental Porcelain; D014025:Titanium