Clinical Performance of Polyethylene Fiber Reinforced Resin Composite Restorations (Wall Papering Technique) Versus Bulk Fill Resin Composite Restorations in Endodontically Treated Teeth Will be Evaluated Using Modified USPHS Criteria.

The missing peripheral tooth structure will be built up via 2-mm wedge-shaped a universal hybrid resin composite, GrandioSO . Then the polyethylene fibers will be wetted with an unfilled resin first . After removing the excess resin, fibers will be covered with a very thin layer of flowable composite X-tra base . After that, fibers will be bonded immediately against the peripheral missing walls and cured for 20 seconds. Then a bulk-fill flowable resin composite lining X-tra base will be applied in approximately 4 mm thick in bulk increments as needed to fill the cavity 2 mm short of the occlusal cavosurface and each increment will be light cured for 20 s. The remaining occlusal part of the cavity will be restored with a universal hybrid resin composite, GrandioSO . The shade of the composite will be selected according to the teeth to be restored. All cavities will be restored with open-sandwich technique (Deliperi, et al. 2017).