title: Susceptibility to corrosion of laser welding composite arch wire in artificial saliva of salivary amylase and pancreatic amylase.
abstract: In this study, laser-welded composite arch wire (CAW) with a copper interlayer was exposed to artificial saliva containing salivary amylase or pancreatic amylase, and the resultant corrosion behavior was studied. The purpose was to determine the mechanisms by which salivary amylase and pancreatic amylase contribute to corrosion. The effects of amylase on the electrochemical resistance of CAW were tested by potentiodynamic polarization measurements. The dissolved corrosion products were determined by ICP-OES, and the surfaces were analyzed by SEM, AFM and EDS. The results showed that both exposure to salivary amylase and pancreatic amylase significantly improved the corrosion resistance of CAW. Even isozyme could have different influences on the alloy surface. When performing in vitro research of materials to be used in oral cavity, the effect of α-amylase should be taken into account since a simple saline solution does not entirely simulate the physiological situation.
authors.affiliation: Guangdong Provincial Stomatological Hospital, No. 366 South of Jiangnan Road, Guangzhou 510280, PR China. Electronic address: wojiushiwo0723@126.com.
authors.forename: Chao
authors.initials: C
authors.lastname: Zhang
authors.affiliation: Department of Orthodontics, Jilin University, No. 1500 Qinghua Road, Changchun 130021, PR China.
authors.forename: Jiming
authors.initials: J
authors.lastname: Liu
authors.affiliation: Department of Orthodontics, Jilin University, No. 1500 Qinghua Road, Changchun 130021, PR China.
authors.forename: Wenwen
authors.initials: W
authors.lastname: Yu
authors.affiliation: Key Laboratory of Automobile Materials, Ministry of Education, and Department of Materials Science and Engineering, Jilin University, No. 5988 Renmin Street, Changchun 130025, PR China.
authors.forename: Daqian
authors.initials: D
authors.lastname: Sun
authors.affiliation: Department of Orthodontics, Jilin University, No. 1500 Qinghua Road, Changchun 130021, PR China.
authors.forename: Xinhua
authors.initials: X
authors.lastname: Sun
mesh_terms: D000497:Alloys / Q000737:chemistry; D003300:Copper / Q000737:chemistry; D003343:Corrosion; D007834:Lasers; D008422:Materials Testing / Q000379:methods*; D018625:Microscopy, Atomic Force; D008855:Microscopy, Electron, Scanning; D009969:Orthodontic Wires; D055292:Pancreatic alpha-Amylases / Q000737:chemistry*; D012463:Saliva / Q000737:chemistry* / Q000201:enzymology; D055291:Salivary alpha-Amylases / Q000737:chemistry*; D013052:Spectrometry, X-Ray Emission
chemical_list: D000497:Alloys; D003300:Copper; D055292:Pancreatic alpha-Amylases; D055291:Salivary alpha-Amylases
keywords: Copper; Corrosion; Interface; Protein adsorption