Comparability of results from two leakage models.
OBJECTIVE
The goal of this study was to check whether leakage results of the same specimens measured by 2 different leakage models are similar.


METHODS
Canine root canals were prepared and filled with cold gutta-percha cones and 1 of 4 sealers (20 canals for each sealer). The 80 specimens were first connected to a fluid transport model where air-bubble movement was measured. The same specimens were later connected to a glucose penetration model where the concentration of glucose was measured. In both models, a headspace pressure of 30 kPa was used to accelerate leakage.


RESULTS
In both models, 4 sealers ranked the same regarding the leakage they allowed, and a significant correlation between the results of the 2 models was confined (Spearman test coefficient = 0.65; P = .000001).


CONCLUSIONS
Under the conditions of this study, leakage results of 80 specimens recorded in the fluid transport model and glucose penetration model were similar.
Department of Restorative Dentistry, Araraquara Dental School, São Paulo State University, São Paulo, Brazil.
Erick Miranda
EM
Souza
Min-Kai
MK
Wu
Hagay
H
Shemesh
Idomeo
I
Bonetti-Filho
Paul R
PR
Wesselink
D000388:Air; D001729:Bismuth / Q000627:therapeutic use; D002368:Castor Oil / Q000627:therapeutic use; D003481:Cuspid / Q000033:anatomy & histology; D001840:Dental Bonding / Q000379:methods*; D003738:Dental Cements / Q000627:therapeutic use; D003763:Dental Leakage / Q000145:classification*; D003786:Dental Pulp Cavity / Q000033:anatomy & histology; D004338:Drug Combinations; D004853:Epoxy Resins / Q000627:therapeutic use; D005947:Glucose; D006171:Gutta-Percha / Q000627:therapeutic use; D006801:Humans; D008422:Materials Testing / Q000379:methods*; D011312:Pressure; D012387:Root Canal Filling Materials / Q000627:therapeutic use*; D012388:Root Canal Irrigants / Q000627:therapeutic use; D018915:Root Canal Preparation / Q000295:instrumentation; D012834:Silver / Q000627:therapeutic use; D012973:Sodium Hypochlorite / Q000627:therapeutic use; D013053:Spectrophotometry; D013997:Time Factors; D014025:Titanium / Q000627:therapeutic use
D003738:Dental Cements; D004338:Drug Combinations; D004853:Epoxy Resins; D012387:Root Canal Filling Materials; D012388:Root Canal Irrigants; C534916:epoxy resin-based root canal sealer; C532269:polifil; C465381:roeko seal; D012834:Silver; C028044:epoxy resin AH-26; D002368:Castor Oil; D006171:Gutta-Percha; D014025:Titanium; D012973:Sodium Hypochlorite; D005947:Glucose; D001729:Bismuth