Dentin permeability: effects of endodontic procedures on root slabs.
The permeability of human radicular dentin was measured as a hydraulic conductance before and after treatment with K files and before and after subsequent treatment of the endodontic smear layer with NaOCl, 50% citric acid, or 3% monopotassium-monohydrogen oxalate. Filing reduced dentin permeability 25 to 49%, respectively, depending upon whether outer or inner root dentin was filed. The permeability of these smear layers was unaffected by 5% NaOCl but increased many times after treatment with 50% citric acid for 2 min. Oxalate treatment lowered root dentin permeability to levels below that produced by creation of smear layers due to the production of a crystalline precipitate.
Fogel
H M
HM
Faculty of Dentistry, University of Manitoba, Winnipeg.
Pashley
D H
DH
D000328:Adult; D002951:Citrates; D019343:Citric Acid; D003804:Dentin / Q000648:ultrastructure; D003806:Dentin Permeability / Q000187:drug effects*; D006801:Humans; D008964:Molar, Third; D010070:Oxalates; D012388:Root Canal Irrigants / Q000494:pharmacology*; D012390:Root Canal Therapy / Q000295:instrumentation; D012973:Sodium Hypochlorite; D014092:Tooth Root / Q000648:ultrastructure
D002951:Citrates; D010070:Oxalates; D012388:Root Canal Irrigants; D019343:Citric Acid; D012973:Sodium Hypochlorite