الفهرس 
Preformed passive dowelsOnly 14 pages are availabe for public view
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Abstract
This in vitro study was performed to evaluate the bond strength of glass fiber dowels using two different adhesive systems in sound and perforated root canals. Forty freshly extracted human periodontally involved, single straight rooted upper central incisor teeth with single canal were selected. The external surfaces of anatomically similar roots of selected teeth with fully developed apices were cleaned of soft tissue and calculus using hand scaler .The crown of each tooth was removed at the level of cemento-enamel junction(CEJ) using a high-speed wheel diamond disk under copious water cooling. To standardize the root canal length for this study, the roots were cut to a uniform length of 14 mm. All root canals were prepared by step back technique, obturated with guttapercha cones and a resin sealer (AH-26) using lateral condensation technique.