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Diminished leakage along root canals filled with gutta‐percha without sealer over time: a laboratory study
Author(s) -
Wu M. K.,
Fan B.,
Wesselink P. R.
Publication year - 2000
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 - 10.1046/j.1365-2591.2000.00274.x
Subject(s) - root canal , gutta percha , leakage (economics) , materials science , dentistry , medicine , economics , macroeconomics
Aim The aim of this study was to investigate the long‐term seal of gutta‐percha (GP) without sealer. Methodology Extracted human maxillary central incisors were prepared and obturated using heat‐ or chloroform‐softened GP only, or GP in combination with a root canal sealer. Leakage along root fillings was measured at 48 h and after a period of 6 months using a fluid transport model. Results At 48 h the GP‐filled roots without sealer leaked more than the control roots filled with GP and sealer ( P <0.0001). At 6 months a significant reduction in leakage was found in the GP‐only groups ( P < 0.05 for both heat‐ and chloroform‐softened GP). After 6 months, roots filled by vertical condensation of GP‐only had similar leakage as vertically condensed GP with a sealer ( P >0.05). Conclusions The long‐term seal of root fillings is affected by the volume change of both GP and sealer. Leakage reduction due to expansion of GP may compensate to a certain extent for leakage that may occur from sealer dissolution.