Permeability of remaining endodontic obturation after post preparation.
This study assessed the correlation between leakage from the cervix to the apex and from the apex to the cervix for different post preparation techniques. Sixty roots were obturated with gutta-percha lateral condensation and AH Plus sealer and divided into two groups of 30 roots each. Immediate post preparation was used for one group and delayed preparation was used for the other. Two subgroups of 15 roots each were formed to investigate leakage from cervix-to-apex and from apex-to-cervix. The extent of leakage was determined using a dye, India ink, and a clearing technique that rendered the teeth transparent. Linear measurement of the dye penetration was recorded and examined with a stereomicroscope. Eight teeth were used as positive and negative controls. Leakage was observed in all samples. No statistically significant differences were found between the immediate and delayed post preparation techniques regarding apex-to-cervix leakage; however, the values of cervix-to-apex leakage were significantly lower for the immediate technique than for the delayed technique.
Department of Removable Prosthesis and Dental Materials, Federal University of Uberlandia, School of Dentistry, Minas Gerais, Brazil.
Celio Jesus
CJ
Prado
Carlos
C
Estrela
Heitor
H
Panzeri
Joao Carlos Gabrielli
JC
Biffi
D004396:Coloring Agents; D003763:Dental Leakage / Q000175:diagnosis; D004853:Epoxy Resins; D006171:Gutta-Percha; D006801:Humans; D010539:Permeability; D011176:Post and Core Technique; D012387:Root Canal Filling Materials; D012389:Root Canal Obturation; D013997:Time Factors
D004396:Coloring Agents; D004853:Epoxy Resins; D012387:Root Canal Filling Materials; C534916:epoxy resin-based root canal sealer; D006171:Gutta-Percha