الفهرس 
IntroductionOnly 14 pages are availabe for public view
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Abstract
Clinical management of trauma or carious lesion of open and sometimes divergent apical morphology and weak root dentine wall makes endodontic procedures challenging, and presents restorative problems. It is important to preserve these weakened teeth in young patients. In the last decade, the use of prefabricated fiber posts has gained a lot of popularity. These new systems have demonstrated a modulus of elasticity that closely matches dentin, a reduction of stresses concentrated within the root canal and reduced incidence of fracture.
Three types of esthetic posts were used with one type of composite resin and one type of adhesive resin luting agent. All of these materials then are covered with an all ceramic crown (IPS e-max press), Where, all materials except the post material were assumed to be homogenous, isotropic, and linearly elastic.
The most significant point in this thesis is to correlate the theoretical part (Finite Element Analysis) to the experimental part (Fracture Resistance Test). As the FEA was carried out at a fixed value of applied load of 50 N, and the analysis type was linear static, the applied load value can be considered as a one loading unit towards the fracture load. The FEA showed the result of this applying unit loading as stresses, and deformations on all components of the studied model (cortical, spongy, PDL, root, etc). Thus, as the resultant stresses are small, a larger load is needed to reach fracture (stress or load).