title: Dye ingress in molars: furcation to chamber floor.
abstract: An in vitro dye leakage study was performed to determine the incidence of patent furcal accessory canals following exposure of the pulp chamber to 5.25% sodium hypochlorite. One hundred extracted molars were labeled, endodontically opened, and irrigated for 1 h at 5-min intervals. The external furcations were exposed to 0.5% basic fuchsin for 24 h. Patency was determined by dye presence on the chamber floor. Statistical analysis revealed that first and second molars, regardless of arch position or location, demonstrated a patent accessory canal at a rate of 57% +/- 19.6% in the furcal area. It was concluded that accessory canal exposure to 5.25% sodium hypochlorite in the furcal area of molars produced patency which was demonstrable via passive methods--no vacuum or injection pressures were utilized.
authors.affiliation: Department of Endodontics, West Virginia University School of Dentistry, Morgantown 26506.
authors.forename: R W
authors.initials: RW
authors.lastname: Niemann
authors.forename: G L
authors.initials: GL
authors.lastname: Dickinson
authors.forename: C R
authors.initials: CR
authors.lastname: Jackson
authors.forename: S
authors.initials: S
authors.lastname: Wearden
authors.forename: A E
authors.initials: AE
authors.lastname: Skidmore
mesh_terms: D016009:Chi-Square Distribution; D004396:Coloring Agents; D003763:Dental Leakage / Q000150:complications / Q000175:diagnosis; D003786:Dental Pulp Cavity / Q000033:anatomy & histology*; D005119:Extravasation of Diagnostic and Therapeutic Materials; D005260:Female; D017823:Furcation Defects / Q000139:chemically induced; D006801:Humans; D008297:Male; D008963:Molar / Q000033:anatomy & histology*; D012973:Sodium Hypochlorite / Q000009:adverse effects; D014092:Tooth Root / Q000033:anatomy & histology
chemical_list: D004396:Coloring Agents; D012973:Sodium Hypochlorite