title: Wear simulation effects on overdenture stud attachments.
abstract: The aim of this study was to evaluate wear effects on overdenture resilient attachments. Six commercially available attachments were investigated: ERA orange and white (EO and EW), Locator pink, white and blue (LRP, LRW and LRB) and OP anchor (OP). Five specimens were used for wear simulation while other two specimens served as controls. Fifteen thousands insertion-removal cycles were simulated. Dimensional changes and surface characteristics were evaluated using light microscopy and SEM, respectively. Sudden decrease of retentive force was characteristic for EO and EW attachments. Retentive force of Locator attachments fluctuated throughout the wear simulation period. Dimensional changes and surface wear was more expressed on plastic cores than on plastic rings of attachment males. Based on SEM analysis, some of the specimens obtained smoother surface after wear simulation. Mechanism of retention loss of resilient overdenture attachments can be only partially explained by dimensional changes and surface alterations.
authors: Division of Prosthodontics, Institute of Odontology, Faculty of Medicine, Vilnius University.
authors: Vygandas
authors: V
authors: Rutkunas
authors: Hiroshi
authors: H
authors: Mizutani
authors: Hidekazu
authors: H
authors: Takahashi
authors: Naohiko
authors: N
authors: Iwasaki
mesh_terms: D000044:Dental Abutments; D015921:Dental Implants; D019094:Dental Prosthesis, Implant-Supported; D003799:Dental Stress Analysis; D003781:Denture Retention; D003828:Denture, Overlay; D006801:Humans; D008422:Materials Testing; D008855:Microscopy, Electron, Scanning; D013314:Stress, Mechanical
chemical_list: D015921:Dental Implants