Long-term seal provided by some root-end filling materials.
A tight and long-lasting seal of root-end fillings is of prime clinical importance. A hundred standard bovine root sections, each 3 mm high and with a central pulp lumen of 2.6 mm in diameter, were filled with five commonly used or potential root-end filling materials. At 24 h, or at 3, 6, or 12 months after filling, leakage along these filling materials was determined under a low headspace pressure of 10 kPa (0.1 atm) using a fluid transport model. During the first 3 months, the percentage of gross leakage (> 20 microliters day-1) increased noticeably for Tytin amalgam (from 20 to 100%) and Super-EBA (from 0 to 55%), whereas it decreased noticeably for mineral trioxide aggregate (MTA; from 55% to 0%). Thereafter, the increased leakage of amalgam and Super-EBA decreased with time, whereas the improved seal of MTA was maintained until the end of the experiment. At 3-, 6-, and 12-month time intervals, both glass ionomer cements (Fuji II and Hi Dense) and MTA showed less leakage than the conventional amalgam and Super-Eba, of which amalgam leaked more.
Wu
M K
MK
Department of Cariology Endodontology, Academic Centre for Dentistry Amsterdam, The Netherlands.
Kontakiotis
E G
EG
Wesselink
P R
PR
D017607:Aluminum Compounds; D000818:Animals; D017610:Calcium Compounds; D002417:Cattle; D003722:Dental Alloys; D003723:Dental Amalgam; D003763:Dental Leakage / Q000517:prevention & control; D017220:Dentin-Bonding Agents; D004338:Drug Combinations; D005069:Evaluation Studies as Topic; D005899:Glass Ionomer Cements; D008137:Longitudinal Studies; D010087:Oxides; D012184:Retrograde Obturation; D012387:Root Canal Filling Materials; D017640:Silicates; D018709:Statistics, Nonparametric
D017607:Aluminum Compounds; D017610:Calcium Compounds; D003722:Dental Alloys; D017220:Dentin-Bonding Agents; D004338:Drug Combinations; D005899:Glass Ionomer Cements; C106661:Hi-Dense; D010087:Oxides; D012387:Root Canal Filling Materials; D017640:Silicates; C086631:mineral trioxide aggregate; C084541:Fuji glass-ionomer lining cement; C036886:tytin; D003723:Dental Amalgam; C084074:Super EBA