次氯酸钠对牛牙髓的溶剂作用及所得液体的物理化学性质

Solvent action of sodium hypochlorite on bovine pulp and physico-chemical properties of resulting liquid.

作者信息

Spanó J C, Barbin E L, Santos T C, Guimarães L F, Pécora J D

机构信息

Department of Endodontics, Faculty of Dentistry of Ribeirão Preto, University of São Paulo, Ribeirão Preto, SP, Brazil.

出版信息

Braz Dent J. 2001;12(3):154-7.

PMID:11696909

Abstract

The solvent effect of 4 concentrations of sodium hypochlorite (0.5, 1.0, 2.5, and 5.0%) on bovine pulp tissue and the level of residual chlorine, pH and surface tension before and after dissolution were studied in vitro. A fragment of bovine pulp was submersed in sodium hypochlorite that circulated in an apparatus with a peristaltic pump and Luer Lok syringe. The higher the concentration of sodium hypochlorite the faster the dissolution of the pulp tissue. All concentrations of sodium hypochlorite reduced the pH and the surface tension and the higher concentrations of the solution had the least consumption of chlorine during tissue dissolution. Thus this study indicated that residual chlorine was directly proportional to concentration in the process of pulp tissue dissolution and that there was residual chlorine at all concentrations used.

摘要

体外研究了4种浓度（0.5%、1.0%、2.5%和5.0%）的次氯酸钠对牛牙髓组织的溶剂效应以及溶解前后的残余氯水平、pH值和表面张力。将一段牛牙髓浸入次氯酸钠中，次氯酸钠在带有蠕动泵和鲁尔锁注射器的装置中循环。次氯酸钠浓度越高，牙髓组织溶解越快。所有浓度的次氯酸钠均降低了pH值和表面张力，且溶液浓度越高，组织溶解过程中氯的消耗量越少。因此，本研究表明，在牙髓组织溶解过程中，残余氯与浓度成正比，且所使用的所有浓度均有残余氯。