title: Reliability of two color selection devices in matching and measuring tooth color.
abstract: OBJECTIVE
  The objective of this study was to investigate the intra and interdevice reliability of two tooth color measurement devices: EasyShade (ES) and SpectroShade Micro (SSM).
  
  
  METHODS
  Tooth color was measured in six maxillary and mandibular. L*, a* and b* values and shade matches to VITA Classical and Vitapan 3D-Master shade guide systems were determined for all teeth. ΔE was assessed. Paired t-test and correlation coefficient (ICC) were used.
  
  
  RESULTS
  Intradevices no significant differences (p > 0.05) were found between L*, a*, b*. Interdevice L* and b* were significantly higher for ES (p < 0.05), while a* was significantly higher for SSM (p < 0.05). ΔE showed no significant interdevice difference (p > 0.05). Intradevices ICC values were higher for ES but not significant (p > 0.05).
  
  
  CONCLUSIONS
  The null hypotheses that they present no differences in their color measuring within devices or shade systems is accepted, but the results allow to reject the null hypotheses that they present no differences in their color measuring or shade systems between devices.
  
  
  CONCLUSIONS
  Both EasyShade (ES) and SpectroShade Micro (SSM) show excellent repeatability and so they can be used in office to evaluate tooth color or to assess color changes after treatment.
  
  
  CONCLUSIONS
  Dental color can be diagnosed using dental spectrophotometers, allowing to detect in an objective way therapeutic dental color changes.
authors.affiliation: Department of Stomatology, University of Valencia, Spain. llena@uv.es
authors.forename: Carmen
authors.initials: C
authors.lastname: Llena
authors.forename: Esther
authors.initials: E
authors.lastname: Lozano
authors.forename: Jose
authors.initials: J
authors.lastname: Amengual
authors.forename: Leopoldo
authors.initials: L
authors.lastname: Forner
mesh_terms: D003116:Color; D005260:Female; D006801:Humans; D008297:Male; D017797:Prosthesis Coloring / Q000295:instrumentation* / Q000592:standards; D015203:Reproducibility of Results; D013053:Spectrophotometry / Q000295:instrumentation* / Q000592:standards; D014070:Tooth / Q000033:anatomy & histology*; D055815:Young Adult