title: Coronal leakage of sealer-only backfill: an in vitro evaluation.
abstract: We tested the hypothesis that AH Plus and Roeko Seal Automix (RSA) sealers alone are no less effective in preventing coronal microleakage than gutta-percha compacted with sealer. Freshly prepared sheep incisor root canals were obturated with warm gutta-percha alone, AHPlus or RSA alone, or warm gutta-percha with AH Plus or RSA (n = 20 each group). Coronal leakage was assessed under vacuum conditions with Indian ink and tooth clearing. Sealer-only backfills with AH Plus and RSA yielded significantly more dye-free canals than backfills of gutta-percha alone or with sealer (p < 0.001). Warm gutta-percha with or without sealer kept no more canals sealer free than the positive control. Mean dye penetration was 0.92% of canal length for AH Plus and RSA backfills, 27.42% for gutta-percha only backfills, 26.47% for gutta-percha with RSA and 13.92% for gutta-percha with AH Plus. Sealer only backfills allowed significantly less leakage than those including warm gutta-percha (p < 0.001). Sealer-only backfills may be a viable alternative to traditional gutta-percha and sealer compaction methods.
authors.affiliation: School of Dental Sciences, Newcastle University, Framlington Place, Newcastle-upon-Tyne, UK. J.M.Whitworth@ncl.ac.uk
authors.forename: John Martin
authors.initials: JM
authors.lastname: Whitworth
authors.forename: Lina
authors.initials: L
authors.lastname: Baco
mesh_terms: D000818:Animals; D016009:Chi-Square Distribution; D003738:Dental Cements; D003763:Dental Leakage / Q000517:prevention & control*; D004853:Epoxy Resins; D006171:Gutta-Percha; D011897:Random Allocation; D012387:Root Canal Filling Materials; D012389:Root Canal Obturation / Q000379:methods*; D012756:Sheep; D034561:Sheep, Domestic; D018709:Statistics, Nonparametric; D019228:Tooth Crown
chemical_list: D003738:Dental Cements; D004853:Epoxy Resins; D012387:Root Canal Filling Materials; C534916:epoxy resin-based root canal sealer; C465381:roeko seal; D006171:Gutta-Percha