title: Time-related surface modification of denture base acrylic resin treated by atmospheric pressure cold plasma.
abstract: The changes of denture base acrylic resin surface properties under cold plasma and the relationships with time were investigated. Cold plasma treated the specimens for 30 s, 60 s, 90 s, and 120 s, respectively. Water contact angles were measured immediately after the treatment, 48 h, 15 days and 30 days later. Surface roughness was measured with 3-D laser scanning microscope. Candida albicans adherence was evaluated by CFU counting. Chemical composition was monitored by X-ray photoelectron spectroscopy analysis. Water contact angle reduced after treated for 30 s. No changes were observed with time prolonged, except the durability. There were no differences in roughness among all groups. However, treatment groups showed significantly lower C. albicans adherence. XPS demonstrated a decrease in C/O, and this reduction was affected by treatment time. Cold plasma was an effective means of increasing hydrophilicity of acrylic resin and reducing C. albicans adherence without affecting physical properties.
authors.affiliation: Department of General Dentistry, Peking University School and Hospital of Stomatology.
authors.forename: Kun
authors.initials: K
authors.lastname: Qian
authors.forename: Hong
authors.initials: H
authors.lastname: Pan
authors.forename: Yinglong
authors.initials: Y
authors.lastname: Li
authors.forename: Guomin
authors.initials: G
authors.lastname: Wang
authors.forename: Jue
authors.initials: J
authors.lastname: Zhang
authors.forename: Jie
authors.initials: J
authors.lastname: Pan
mesh_terms: D000180:Acrylic Resins / Q000737:chemistry*; D001274:Atmospheric Pressure; D002176:Candida albicans; D002448:Cell Adhesion; D003819:Denture Bases; D008422:Materials Testing; D018613:Microscopy, Confocal; D056951:Photoelectron Spectroscopy; D058626:Plasma Gases / Q000737:chemistry*; D019904:Polymethyl Methacrylate; D013499:Surface Properties; D013997:Time Factors
chemical_list: D000180:Acrylic Resins; D058626:Plasma Gases; D019904:Polymethyl Methacrylate