title: Reduction in static friction by deposition of a homogeneous diamond-like carbon (DLC) coating on orthodontic brackets.
abstract: In orthodontics, a reduction in static friction between the brackets and wire is important to enable easy tooth movement. The aim of this study was to examine the effects of a homogeneous diamond-like carbon (DLC) coating on the whole surfaces of slots in stainless steel orthodontic brackets on reducing the static friction between the brackets and the wire. The DLC coating was characterized using Raman spectroscopy, surface roughness and contact angle measurements, and SEM observations. Rectangular stainless steel and titanium-molybdenum alloy wires with two different sizes were employed, and the static friction between the brackets and wire was measured under dry and wet conditions. The DLC coating had a thickness of approximately 1.0 μm and an amorphous structure was identified. The results indicated that the DLC coating always led to a reduction in static friction.
authors.affiliation: Department of Orthodontics, Tsurumi University School of Dental Medicine.
authors.forename: Shun
authors.initials: S
authors.lastname: Akaike
authors.forename: Tohru
authors.initials: T
authors.lastname: Hayakawa
authors.forename: Daishiro
authors.initials: D
authors.lastname: Kobayashi
authors.forename: Yuko
authors.initials: Y
authors.lastname: Aono
authors.forename: Atsushi
authors.initials: A
authors.lastname: Hirata
authors.forename: Masanori
authors.initials: M
authors.lastname: Hiratsuka
authors.forename: Yoshiki
authors.initials: Y
authors.lastname: Nakamura
mesh_terms: D002244:Carbon / Q000737:chemistry*; D020099:Coated Materials, Biocompatible / Q000737:chemistry; D003722:Dental Alloys / Q000737:chemistry; D003799:Dental Stress Analysis; D017276:Friction; D008422:Materials Testing; D008855:Microscopy, Electron, Scanning; D008982:Molybdenum / Q000737:chemistry; D016910:Orthodontic Brackets; D009969:Orthodontic Wires; D013059:Spectrum Analysis, Raman; D013193:Stainless Steel / Q000737:chemistry; D014025:Titanium / Q000737:chemistry
chemical_list: D020099:Coated Materials, Biocompatible; D003722:Dental Alloys; D013193:Stainless Steel; D002244:Carbon; D008982:Molybdenum; D014025:Titanium