title: Effects of gingival retraction materials on gingival blood flow.
abstract: OBJECTIVE
  The effects of 2 chemical retraction agents on gingival blood flow and systemic blood pressure in subjects with healthy gingiva were investigated.
  
  
  METHODS
  Thirty volunteer dental students were selected for the study and randomly divided into 2 groups. Aluminium chloride-impregnated cord (right side) and nonimpregnated cord (left side) were placed in the gingival sulcus of group 1. Epinephrine-impregnated cord (right side) and nonimpregnated cord (left side) were placed in group 2. Blood flow in the retracted marginal gingiva was measured by laser Doppler flowmetry, and the systemic blood pressures of subjects were recorded before and after the retraction procedure.
  
  
  RESULTS
  A statistically significant decrease in blood flow was observed in group 2, but there was no significant change in gingival blood flow in group 1. A decrease in diastolic blood pressure of the subjects in group 2 was also observed. However, there was no significant change in blood pressure of the subjects in group 1.
  
  
  CONCLUSIONS
  Gingival retraction affects gingival blood flow temporarily. Epinephrine-impregnated cords can be used safely in patients who have healthy gingiva, if patient stress and gingival trauma are avoided during cord placement.
authors.affiliation: Department of Prosthodontics, Faculty of Dentistry, Cumhuriyet University, Sivas, Turkey. tpolat@cumhuriyet.edu.tr
authors.forename: N Tülin
authors.initials: NT
authors.lastname: Polat
authors.forename: A Kemal
authors.initials: AK
authors.lastname: Ozdemir
authors.forename: Mehmet
authors.initials: M
authors.lastname: Turgut
mesh_terms: D000328:Adult; D000077410:Aluminum Chloride; D017607:Aluminum Compounds / Q000627:therapeutic use; D001252:Astringents / Q000627:therapeutic use; D001794:Blood Pressure / Q000187:drug effects*; D002712:Chlorides / Q000627:therapeutic use; D003793:Dental Restoration, Permanent / Q000379:methods; D004837:Epinephrine / Q000627:therapeutic use*; D005260:Female; D005881:Gingiva / Q000098:blood supply / Q000187:drug effects*; D005884:Gingival Hemorrhage / Q000517:prevention & control; D006801:Humans; D008297:Male; D014662:Vasoconstrictor Agents / Q000627:therapeutic use*
chemical_list: D017607:Aluminum Compounds; D001252:Astringents; D002712:Chlorides; D014662:Vasoconstrictor Agents; D000077410:Aluminum Chloride; D004837:Epinephrine