Evaluation of the diffusion capacity of calcium hydroxide pastes through the dentinal tubules.
This study aimed to evaluate the diffusion capacity of calcium hydroxide pastes with different vehicles through dentinal tubules. The study was conducted on 60 extracted single-rooted human teeth whose crowns had been removed. The root canals were instrumented and divided into 4 groups according to the vehicle of the calcium hydroxide paste: Group I - distilled water; Group II - propylene glycol; Group III - 0.2% chlorhexidine; Group IV - 2% chlorhexidine. After placement of the root canal dressings, the teeth were sealed and placed in flasks containing deionized water. After 1, 2, 7, 15, 30, 45 and 60 days, the pH of the water was measured to determine the diffusion of calcium hydroxide through the dentinal tubules. The data were recorded and statistically compared by the Tukey test. The results showed that all pastes presented a similar diffusion capacity through dentin. Group IV did not present difference compared to group I. Group II presented difference compared to the other groups, as did Group III. In conclusion, groups I and IV presented a better diffusion capacity through dentin than groups II and III; 2% chlorhexidine can be used as a vehicle in calcium hydroxide pastes.
Mori
Graziela Garrido
GG
Dental School of Adamantina, Adamantina, SP, Brazil. grazielagm@hotmail.com
Ferreira
Fábio Cézar
FC
Batista
Fábio Roberto de Souza
FR
Godoy
Alessandro Mauro de Siqueira
AM
Nunes
Daniele Clapes
DC
D002126:Calcium Hydroxide / Q000737:chemistry / Q000493:pharmacokinetics*; D002710:Chlorhexidine / Q000008:administration & dosage*; D003804:Dentin / Q000378:metabolism*; D004058:Diffusion; D006801:Humans; D006863:Hydrogen-Ion Concentration; D014677:Pharmaceutical Vehicles; D012387:Root Canal Filling Materials / Q000737:chemistry / Q000493:pharmacokinetics*; D018915:Root Canal Preparation
D014677:Pharmaceutical Vehicles; D012387:Root Canal Filling Materials; D002126:Calcium Hydroxide; D002710:Chlorhexidine