8[2]Kwan HE, Harrington CW. The effect of immediate post preparation on the apical seal[J]. J. Endodont, 1981, 7(7): 325 ～ 329
9[5]Libman WJ , Nicholls JI, Load fatigue of teeth restored with cast posts and cores and completes crowns[J]. Int J Prosthodont, 1995, 8 (2): 155 ～ 161
