الفهرس يوجد فقط 14 صفحة متاحة للعرض العام
 |  | from | 89 |  |  |
| | | from | 89 | | |
المستخلص
The present study aimed to compare the ability of different types of posts to reinforce endodontically treated teeth by evaluation of the fracture resistance of the reinforced teeth. Fifty six intact human central incisor were endodontically treated by lateral condensation technique using hand file instruments. The teeth were divided into seven groups and then six groups were prepared to receive different types of posts using special drill supplied with post manufacturers while the last group was left as a controlled group. The posts were then cemented to their prepared root canals using relyX unicem resin cement. All teeth after that were mounted in plastic tube full of acrylic resin. For standardization mean the cementation load, a specially constructed cementation device, was used to apply a constant load (3kg) on the cemented posts during setting for 5 minutes. Posts then cut using disk and round burs to be extended 2mm. in the pulp chamber. The core was then built into each tooth including the controlled group using light cured composite resin. Teeth with their post-cores were then divided into seven main groups according to the type of the post used to reinforce the teeth. group (1): eight teeth reinforced by zirconia posts. group (2): eight teeth reinforced by RlyX fiber posts. group (3): eight teeth reinforced by carbon fiber posts. group (4): eight teeth reinforced by costume made posts. group (5): eight teeth reinforced by titanium posts. group (6): eight teeth reinforced by mixed posts posts group (7): eight teeth left without post reinforcement