New core and sealer materials for root canal obturation and retrofilling.
A new endodontic obturation and retrofilling material has been invented to satisfy Grossman's requirements for an ideal material. Methylene blue dye leakage studies were carried out to compare the new material with conventional products, for both obturation and retrofilling. The experimental material when used in root canal obturation had a mean apical leakage of 0.49+/-0.27 mm, compared with 3.75+/-2.81 mm for the conventional material (p < 0.01, t test). Retrofilling leakage was not significantly different from that of a glass-ionomer (p < 0.01, t test) but was substantially lower than that of MTA and Super EBA (p < 0.01, Chi-square test). It was concluded that leakage in root canal obturation was reduced by an order of magnitude and in retrofilling was significantly better than clinically advocated materials. It was inferred that the adhesion mechanism used has contributed to the reduction in leakage.
Minnesota Dental Research Center for Biomaterials and Biomechanics, Department of Oral Science, University of Minnesota School of Dentistry, Minneapolis 55455, USA.
Ernest S
ES
Reeh
Edward C
EC
Combe
D000268:Adhesiveness; D004396:Coloring Agents; D003763:Dental Leakage / Q000175:diagnosis / Q000517:prevention & control; D003806:Dentin Permeability; D017220:Dentin-Bonding Agents; D006801:Humans; D008751:Methylene Blue; D011897:Random Allocation; D012184:Retrograde Obturation; D012387:Root Canal Filling Materials; D012389:Root Canal Obturation
D004396:Coloring Agents; D017220:Dentin-Bonding Agents; D012387:Root Canal Filling Materials; D008751:Methylene Blue