3[1]Himel V T, Brady J Jr, Weir J Jr. Evaluation of repair of mechanical perforations of the pulp chamber floor using biodegradable tricalcium phosphate or calcium hydroxide[J] .J Endod, 1985,11(4) :161 ～ 165.
4[2]Aguirre R, Eideeb M E. Evaluation of repair of mechanical furcation perforations using amalgam, guttapercha of ndium foil[J]. J Endod, 1986, 12(6): 249 ～256.
5[3]Sinai L H. Endontic perforations: their prognosis and treatment [ J ]. Am Dent Assoc, 1997,95 ( 1 ): 90 ～ 95.
6Jacquot BM, Panighi MM, Steinmetz P, et al. Evaluation of temporary restorations' microleakage by means of electrochemical impedance measurements[J]. J Endod ,1996,22(11):586-589.
7Hachmeister DR,Schindler WG,Walker WA,et al. The sealing ability and retention characteristics of mineral trioxide aggregate in a model of apexification[J]. J Endod,2002,28(5):386-390.
8Chohayeb A A,Bassiounv M A. Sealing ability of intermediate restoratives used in endodontics[J]. J Endod,1985,11(6):241-244.
9Pameijer CH, Wendt SL. Microleakage of "surface-sealing"materials[J]. Am J Dent, 1995,8(1):43-46.
10Tewari S,Tewaris ,Haryana R,et al.Assessment of coronal microleakage in intermediately restored endodontic access cavities[J].Oral Surg Oral Med Oral Pathol,2001,93(6):716-719.
