2Irfan A. Yttrium-Partially stabilized zirconium dioxide posts: An approach to restoring coronally compromised nonvital teeth. Int J Periodont Rest Dent, 1998,18:455.
3Pontius, Hutter, Jeffrey W. Survival rate and fracture strength of incisors restored with different post and core systems and endodontically treated incisors without coronoradicular reinforcement. J Endodontics, 2002,28(10): 710.
4Zalkind M, Hochman N. Esthet considerations in restoring endodontically treated teeth with posts and cores. J Prosthet Dent, 1998,79(6):702.
5Meyenberg KH, Luthy H. Zirconia posts: a new all-ceramic concept for nonvital abutment teeth. J Esthet Dent, 1995,7(2):73.
6Butz F,Lennon AM,Heydecke G, et al. Survival rate and fracture strength of endodontically treated maxillary incisors with moderate defects restored with different post-core systems: an in vitro study. Int J Prosthodont, 2001,14 (1): 58.