7Imfeled TN. Prevalence and quality of endodontic treatment in elderly urban population of Switzerland [ J ]. J Endod, 1991,17 ( 10 ) :604 -7.
8Boucher Y, Matossian L, Rilliard F, et al. Radiographic evaluation of the prevalence and technical quality of root canal treatment in a French subpopulation[J]. Int Endod J,2002,35 ( 3 ) :229 - 38.
5Imfeled TN.Prevalence and quality of endodontic treatment in elderly urban population of Switzerland [J].J Endod,1991,17(10):604-607.
6Boucher Y,Matossian L,Rilliard F,et al.Radiographic evaluation of the prevalence and technical quality of root canal treatment in a French subpopulation[J].Int Endod J,2002,35(3):229-238.
7Ruddle CJ.Cleaning and shaping the root canal system.In:Cohen S,Burns RC.Pathways of the pulp [M].8th ed.St.Louis:Mosby.2002:259-260.
8Stuart KG,Miller CH,Brown CE Jr,et al.The comparative antimicrobial effect of calcium hydroxide [J].Oral Surg Oral Med Oral Pathol.1991,72(1):101-104.
9Safavi KE,Nichols FC.Alteration of biological properties of bacterial lipopolysaccharide by calcium hydroxide treatment [J].J Endod,1994,20(3):127- 129.
