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Abstract
This study evaluated the effect of different surface treatments of root dentin and silanization of fiber post on the fracture strength of endodontically treated teeth.
Recently extracted maxillary incisors were selected on the basis of lack of any carious lesions, microfractures, or abrasion cavities. They were stored in saline solution until used for experimentation. The teeth were decoronated at a level 1 mm coronal to proximal CEJ, subjected to conventional endodontic treatment and then mounted vertically in resin blocks to a depth of 2 mm apical to CEJ. Post preparations for the root canals were done.
The selected teeth were randomly assigned to three experimental groups according to root dentin surface treatment:
• Group A1: the root canal dentin was treated with 35% phosphoric acid.
• Group A2: the root canal dentin was treated with 20% lactic acid.
• Group A3: the root canal dentin was treated with 35% phosphoric acid then irrigated with 10% NaOCl.
Then each group was treated with or without self-etching primer application to canal walls. In each group; half of the samples were restored with silane-treated posts while the other half was restored with non-treated posts.
For the control group: the post surface was not silanated, while the root canal dentin was treated with a self-etching primer only.