A successful endodontic treatment depends on endodontic treatment as well as post endodontically restoring the lost tooth structure2 . Compared to vital teeth, root canal-treated teeth will be more prone to biomechanical problems. Post-core treatments are often used in dentistry to prevent fracture of the remaining dental tissues in crown treatments and to support the final restorations in root canal-treated teeth, especially those with extensive loss of tooth structure. An ideal post should dissipate the occlusal load acting on the tooth uniformly. In the event of a retreatment the post must be easily removeable.

[1] Microleakage and fracture patterns of teeth restored with different posts under dynamic loading. Sung-Ho Jung, DDS, MSD,a Kyung-San Min, DDS, PhD, Hoon Sang Chang, DDS, MSD,c Sung-Do Park, DDS, Soon-Nyu Kwon, DDS, and Ji-Myung Bae, DDS, PhD College of Dentistry, Wonkwang University, Iksan City, Korea

[2] Mechanical and thermal stress evaluation of PEEK prefabricated post with different head design in endodontically treated tooth: 3D-finite element analysis Rawa Omar IBRAHIM1 , Abdulsalam Rashid AL-ZAHAWI and Laith Abed SABRI Conservative Department, College of Dentistry, University of Sulaimani, Iraq

[3] Textbook of Endodontics-Nisha Garg,Amit Garg.

[4] Heling I, Gorfil C, Slutzky H, Kopolovic K, Zalkind M, Slutzky-Goldberg I. Endodontic failure caused by inadequate restoration procedures: Review and treatment recommendations. J Prosthet Dent 2002; 87:674–678.

[5] Sedgley CM, Messer HH. Are endodontically treated teeth more brittle? J Endod 1992;18:332–335.

[6] Swanson K, Madison S. An evaluation of coronal microleakage in endodontically treated teeth. Part 1. Time periods. J Endodon 1987;13:56–9

[7] Restoring endodontically treated teeth with posts and cores—A review Ingrid Peroz, Dr Med Dent1/Felix Blankenstein, Dr Med Dent Klaus-Peter Lange, Prof Dr Med Dent2/Michael Naumann, Dr Med Dent

[8] Post Placement and Restoration of Endodontically Treated Teeth: A Literature Review Richard S. Schwartz, DDS, and James W. Robbins, DDS, MA

[9] ..Evolution of Posts - From Rigidity to Flexibility Dr. Raman Mishra1, Dr. Vidhyadhara S Shetty2, Dr. Vivian Flourish D’Costa3, Dr. K Harish Shetty4