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The effect of the canal‐filled area on the bacterial leakage of oval‐shaped canals
Author(s) -
DeDeus G.,
Murad C.,
Paciornik S.,
Reis C. M.,
CoutinhoFilho T.
Publication year - 2008
Publication title -
international endodontic journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.988
H-Index - 119
eISSN - 1365-2591
pISSN - 0143-2885
DOI - 10.1111/j.1365-2591.2007.01320.x
Subject(s) - root canal , materials science , dentistry , coronal plane , gutta percha , leakage (economics) , significant difference , anatomy , medicine , economics , macroeconomics
Aim To compare the sealing ability and the canal‐filled area (gutta‐percha + sealer) of three current filling techniques in oval‐shaped canals. Methodology A total of 50 oval‐shaped root canals were prepared and root filled as follows: G1: lateral condensation ( n = 10), G2: System B ( n = 10) and G3: Thermafil system ( n = 10). All teeth were mounted in a two‐chamber apparatus and the coronal access was exposed to human saliva. The appearance of turbidity in the BHI broth over a 15‐week period was observed. A cross section of each tooth was made 5 mm from the apex and the samples were prepared for microscopic analysis. Digital image measurements of the cross‐sectional area and the area filled by gutta‐percha and sealer were performed. Log‐rank and Fisher’s exact tests were used to analyse the leakage data. Student’s t ‐test was used to analyse the filled‐area data. Results Overall, 30% of the specimens of G1 and G2 and 20% of G3 demonstrated leakage after 15 weeks and no significant difference was found amongst the groups ( P > 0.05). The percentage of canal‐filled area was 68, 70 and 78%, respectively ( P > 0.05). The correlation analysis revealed no significant relation between the pattern of bacterial leakage and canal‐filled area ( P = 0.128). Conclusions No significant difference in apical sealing and canal‐filled area in oval‐shaped canals was seen between the three filling techniques. No significant correlation was found between the quality of the apical seal and the filled‐area of the root canal space.