title: Basic study of the use of laser on detection of vertical root fracture.
abstract: OBJECTIVE
  Many methods are used to detect vertical root fractures, but most are not adequate for identification of incomplete fractures or cracks. The purpose of this study was to evaluate the effects of three detergents on detection of vertical root fractures by DIAGNOdent with methylene blue (MB) solution.
  
  
  METHODS
  Vertical incomplete fractures were artificially created on the roots of extracted human teeth, the DIAGNOdent values (D values) recorded in the presence or absence of MB solution, and the effects of detergents on D values examined. The effects of 20% ethanol on enhancing detergent action were also investigated. Statistical analysis was performed using the Mann-Whitney U-test; a value of p<0.01 was considered significant.
  
  
  RESULTS
  D values increased significantly when MB solution was used with 0.1% or 1.0% polyoxyethylene (10) octylphenyl ether compared to MB solution only.
  
  
  CONCLUSIONS
  These findings suggest that 0.1% or 1.0% polyoxyethylene (10) octylphenyl ether could be used as an enhancer for detection of vertical root fractures by DIAGNOdent using MB solution.
authors: Division of Endodontics, Department of Conservative Dentistry, Ohu University School of Dentistry, 31-1 Misumido, Tomita-machi, Koriyama-city, Fukushima, Japan. y-kimura@den.ohu-u.ac.jp
authors: Yuichi
authors: Y
authors: Kimura
authors: Michihiko
authors: M
authors: Tanabe
authors: Yoshikazu
authors: Y
authors: Amano
authors: Jun-Ichiro
authors: J
authors: Kinoshita
authors: Yoshishige
authors: Y
authors: Yamada
authors: Yoshiko
authors: Y
authors: Masuda
mesh_terms: D004396:Coloring Agents; D003902:Detergents; D000431:Ethanol; D006801:Humans; D007834:Lasers; D008751:Methylene Blue; D017830:Octoxynol; D011136:Polysorbates; D012967:Sodium Dodecyl Sulfate; D012997:Solvents; D013501:Surface-Active Agents; D014082:Tooth Fractures / Q000145:classification / Q000175:diagnosis*; D014092:Tooth Root / Q000293:injuries*
chemical_list: D004396:Coloring Agents; D003902:Detergents; D011136:Polysorbates; D012997:Solvents; D013501:Surface-Active Agents; D012967:Sodium Dodecyl Sulfate; D000431:Ethanol; D017830:Octoxynol; D008751:Methylene Blue