Sealing ability of three materials used to repair lateral root perforations.
Thirty-five extracted single-rooted human teeth were decoronalized, root filled with AH-26 and gutta-percha, and perforated at the apical one third level. Repairs of the lateral perforations were carried out with three materials: amalgam plus cavity varnish, EBA cement, and silver glass-ionomer cement. Negative controls were not perforated and positive controls had unrepaired perforations. The roots were then implanted subcutaneously in rats for 5 days to place the materials in a surgical environment. Following retrieval, the roots were placed in a solution containing 20 microCi/ml of calcium-45 for 7 days to measure microleakage. They were rinsed, sectioned, and autoradiographs of the repaired perforations were made. The autoradiographs were projected onto a screen and the extent of penetration of the radioisotope measured. Statistical analysis showed that the EBA cement group exhibited significantly less leakage than the silver glass-ionomer cement group (p < 0.05). No differences were found between the other groups. It was concluded that EBA cement provides a superior seal in lateral root perforations to silver glass-ionomer cement while amalgam was intermediate between the two.
School of Dental Science, Faculty of Medicine and Dentistry, University of Melbourne, Victoria, Australia.
L G
LG
Moloney
S A
SA
Feik
G
G
Ellender
D000537:Aluminum Oxide; D000704:Analysis of Variance; D016722:Cermet Cements; D003723:Dental Amalgam; D003738:Dental Cements; D003763:Dental Leakage; D003793:Dental Restoration, Permanent / Q000379:methods*; D006801:Humans; D011877:Radionuclide Imaging; D014092:Tooth Root / Q000000981:diagnostic imaging / Q000293:injuries*
D016722:Cermet Cements; D003738:Dental Cements; C022998:EBA alumina cement; D003723:Dental Amalgam; D000537:Aluminum Oxide