title: A self-disinfecting irreversible hydrocolloid impression material mixed with chlorhexidine solution.
abstract: OBJECTIVE
  To examine the antibacterial effect and several physical properties of an irreversible hydrocolloid impression material mixed with chlorhexidine solution.
  
  
  METHODS
  The experimental irreversible hydrocolloid specimens were prepared and allocated into four groups (Group0.1 g/L, Group0.2 g/L, Group0.5 g/L, Group1.0 g/L) according to the concentrations of chlorhexidine solution used as the mixing liquid. Specimens mixed with distilled water served as a control. The antibacterial effect, three-dimensional accuracy, flowability, and setting time were tested. Statistical analysis was performed using a one-way analysis of variance and a Tukey test, which was used for multiple comparisons (alpha=.05).
  
  
  RESULTS
  Zones of growth inhibition were observed around the test specimens, but not around the control specimens, and there were significant intergroup differences in the diameters of the inhibition zones. In the accuracy test, no significant differences (P>.05) were detected among all the measurements for all groups, and the accuracy was clinically acceptable. Also, no significant differences in the flowability (P=.987) and setting time (P=.103) were detected.
  
  
  CONCLUSIONS
  Chlorhexidine self-disinfecting irreversible hydrocolloid impression material can exhibit varying degrees of antibacterial activity without influencing the three-dimensional accuracy, flowability, and setting time.
authors: Department of Prosthodontics, West China College of Stomatology, Sichuan University, China.
authors: Jian
authors: J
authors: Wang
authors: Qianbing
authors: Q
authors: Wan
authors: Yonglie
authors: Y
authors: Chao
authors: Yifan
authors: Y
authors: Chen
mesh_terms: D001419:Bacteria / Q000187:drug effects*; D001672:Biocompatible Materials / Q000494:pharmacology*; D002710:Chlorhexidine / Q000494:pharmacology*; D003760:Dental Impression Materials / Q000737:chemistry / Q000494:pharmacology*; D004202:Disinfectants / Q000494:pharmacology*; D013997:Time Factors
chemical_list: D001672:Biocompatible Materials; D003760:Dental Impression Materials; D004202:Disinfectants; D002710:Chlorhexidine