Gas permeability: a new quantitative method to assess endodontic leakage.
OBJECTIVE
The aim of this study was to evaluate a new endodontic leakage measurement method.


METHODS
Permeability was assessed measuring the gas flow passing through the root. Positive and negative tests were carried out to assess the validity of the method. We used glass capillaries for calibration (diameters of 15, 30, 40, 50 and 75 microm). The applicability of the method was assessed with human teeth using three sealing methods: GuttaFlow (GF) and a single cone; Pulp Canal Sealer (PCS) and a single cone; PCS and system B.


RESULTS
This method demonstrated to be highly reproducible as the standard deviation was approximately 1% on average with glass capillaries. Significantly higher leakage (p<0.05) was recorded for endodontic treatment with GF and single cone compared to PCS and single cone and PCS with system B.


CONCLUSIONS
Gas permeability is quantitative, sensitive, non-destructive and reproducible and seems appropriate for endodontic tests. It would participate in the indirect comprehension of leakage phenomena.
Romieu
Olivier J
OJ
Bio-nano Laboratory, EA 4203, UFR d'Odontologie, Université Montpellier 1, Montpellier, France. Olivier@romieu.info
Jacquot
Bruno
B
Callas-Etienne
Sylvie
S
Dutilleul
Pierre-Yves Collard
PY
Levallois
Bernard
B
Cuisinier
Frederic J G
FJ
D000465:Algorithms; D003763:Dental Leakage / Q000517:prevention & control*; D004708:Endodontics / Q000295:instrumentation*; D019544:Equipment Failure Analysis / Q000295:instrumentation* / Q000379:methods*; D005740:Gases / Q000032:analysis*; D006801:Humans; D010539:Permeability; D012387:Root Canal Filling Materials
D005740:Gases; D012387:Root Canal Filling Materials