title: Quantification of in vitro produced wear sites on composite resins using contact profilometry and CCD microscopy: a methodological investigation.
abstract: BACKGROUND
  Although attritive and abrasive wear of recent composite resins has been substantially reduced, in vitro wear testing with reasonably simulating devices and quantitative determination of resulting wear is still needed. Three-dimensional scanning methods are frequently used for this purpose. The aim of this trial was to compare maximum depth of wear and volume loss of composite samples, evaluated with a contact profilometer and a non-contact CCD camera imaging system, respectively.
  
  
  METHODS
  Twenty-three random composite specimens with wear traces produced in a ball-on-disc sliding device, using poppy seed slurry and PMMA suspension as third-body media, were evaluated with the contact profilometer (TalyScan 150, Taylor Hobson LTD, Leicester, UK) and with the digital CCD microscope (VHX1000, KEYENCE, Osaka, Japan). The target parameters were maximum depth of the wear and volume loss.Results - The individual time of measurement needed with the non-contact CCD method was almost three hours less than that with the contact method. Both, maximum depth of wear and volume loss data, recorded with the two methods were linearly correlated (r(2) > 0.97; p < 0.01).
  
  
  CONCLUSIONS
  The contact scanning method and the non-contact CCD method are equally suitable for determination of maximum depth of wear and volume loss of abraded composite resins.
authors.affiliation: Advanced Biomaterials, Department of Restorative Sciences, Division of Oral Health Sciences, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo.
authors.forename: Natthavoot
authors.initials: N
authors.lastname: Koottathape
authors.forename: Hidekazu
authors.initials: H
authors.lastname: Takahashi
authors.forename: Wernerj
authors.initials: W
authors.lastname: Finger
authors.forename: Masafumi
authors.initials: M
authors.lastname: Kanehira
authors.forename: Naohiko
authors.initials: N
authors.lastname: Iwasaki
authors.forename: Yujin
authors.initials: Y
authors.lastname: Aoyagi
mesh_terms: D017554:Carbon Compounds, Inorganic / Q000737:chemistry; D003188:Composite Resins / Q000737:chemistry*; D003764:Dental Materials / Q000737:chemistry*; D006801:Humans; D007091:Image Processing, Computer-Assisted / Q000379:methods; D021621:Imaging, Three-Dimensional / Q000379:methods; D055115:Light-Curing of Dental Adhesives / Q000295:instrumentation; D008422:Materials Testing / Q000295:instrumentation; D008689:Methacrylates / Q000737:chemistry; D008853:Microscopy / Q000379:methods; D010207:Papaver; D019904:Polymethyl Methacrylate / Q000737:chemistry; D012639:Seeds; D017655:Silicon Compounds / Q000737:chemistry; D013499:Surface Properties; D013696:Temperature; D013997:Time Factors; D014867:Water / Q000737:chemistry; D015040:Zirconium / Q000737:chemistry
chemical_list: D017554:Carbon Compounds, Inorganic; C112828:Clearfil AP-X; D003188:Composite Resins; D003764:Dental Materials; D008689:Methacrylates; D017655:Silicon Compounds; D014867:Water; C039734:Durafill; D019904:Polymethyl Methacrylate; D015040:Zirconium; C028541:zirconium oxide; C022088:silicon carbide