title: Comparison of apical sealing methods. A preliminary report.
abstract: A comparison of the seal provided by gutta-percha root canal filling, heat-sealed gutta-percha, retrograde amalgam filling, and retrograde Durelon filling was made by observation of dye penetration around the above filling materials in extracted teeth. A small but not significant difference between gutta-percha, heat-sealed gutta-percha, and retrograde amalgam was noted. Retrograde Durelon filling gave a poor seal in comparison to gutta-percha and retrograde amalgam filling, but the difference between it and the heat seal was not significant.
mesh_terms: D001047:Apicoectomy; D003723:Dental Amalgam / Q000592:standards; D006801:Humans; D008751:Methylene Blue; D009811:Odontometry; D011076:Polycarboxylate Cement / Q000592:standards; D012184:Retrograde Obturation / Q000592:standards; D012387:Root Canal Filling Materials / Q000592:standards; D012389:Root Canal Obturation / Q000592:standards*; D013194:Staining and Labeling; D014092:Tooth Root / Q000033:anatomy & histology
chemical_list: D011076:Polycarboxylate Cement; D012387:Root Canal Filling Materials; D003723:Dental Amalgam; D008751:Methylene Blue