3MORGANO S M.Restoration of pulpless teeth:application of traditional principles in present and future contexts.J Prosthet Dent,1996,75(4):375-380.
4KARAPANOU V,VERA J,CABRERA P,et al.Effect of immedate and delayed postpreparation on apical dye leakage using two different sealers.J Endod,1996,22(11):583-585.
5CARRATU P,AMATO M,RICCITIELLO F,et al.Evaluation of leakage of bacteria and endotoxins in teeth treated endodontically by two different techniques.J Endod,2002,28(4):272-275.