2Orstavik D,Eldeniz AU.A laboratory assessment of coronal bacterial leakage in root canals filled with new and conventional sealers[J].Int Endod J,2009,42(4):303-312.
3Geurtsen W, Schwarze T, Gunay H.Diagnosis, therapy and prevention of the cracked tooth syndrome[J].Quintessence Int, 2003, 34(6): 409-417.
4Sathorn C, Parashos P, Messer H.Effectiveness of single-ver-sus multiple-visit endodontic treatment of teeth with apical periodontitis : a systematic review and meta-analysis[J].Int Endod J, 2005, 38(6): 347- 355.
5Libisieh E B, Hilton T J, Ferraeane J.Cracked'teeth: a review of the literature[J].J Esther Restor Dent, 2010, 22(3): 158-167.