The study will be conducted in Conservative Dentistry Department, Faculty of Dentistry, Cairo University; The operator in charge will be Esraa Esmeail Hussien.~Null-hypothesis: There are no differences in the clinical performance of indirect CAD/CAM milled composite when compared to direct bulk-fil composite endocrowns when in the posterior area.~Aim: This clinical trial will be conducted to assess the clinical performance of using indirect Milled composite or direct bulk-fill resin composite Endo-crowns for restoring the endo-treated teeth, as well to measure the amount of wear on the occlusal tables of both restorations using Digital Scanner.~Patients will be selected from the outpatient clinic of the department Conservative Dentistry Department, Faculty of Dentistry, Cairo University~Clinical Steps:~A tapered stone with rounded end in a high-speed handpiece with air /water coolant will be used to properly prepare the cavity walls to receive the indirect restoration and any remaining carious dentin will be excavated and removed.~Cuspal tipping will be done by a wheel stone about 1.5-2mm.~The entrance to the pulpal canal will be opened. Gutta percha will be removed to a depth not exceeding 2 mm to take advantage of the saddle-like anatomy of the cavity floor. This should be done with a nonabrasive instrument to maintain the integrity of the canal's entrance. No drilling into the dentin will be carried out.~Any remaining undercuts will be blocked with conventional resin composite.~The impression will be taken, and the final restoration will be fabricated either direct or indirect.~The final restoration should be checked intraorally for proximal contacts, occlusion and marginal fit before cementation.~Isolation of operatory field using rubber dam.~Selective enamel etching technique will be applied for bonding of tooth structure, 35-40% phosphoric acid gel will be applied to the enamel margins only for 15 seconds, rinsed for 15 seconds and gently dried by cotton pellet.~Adhesive will be used according to the manufacturers' instructions.~Adhesive resin cement will be applied into the preparation. The restoration will be placed in the cavity and checked for complete seating. The cement will be light cured for only 2 seconds to facilitate removal of the excess. Then light curing will be done from all directions each for 40 seconds for achieving the final set.~The proximal contacts will be checked with dental floss.~The occlusion will be adjusted using articulating paper.~Finishing and Polishing using finishing stones and polishing rubber points.~Primary Objective: To evaluate clinical performance of different Techniques of Composite Restorations (Indirect restorations using a CAD/CAM grinding process, BRILLIANT Crios, Coltène/Whaledent AG, Switzerland or Direct a light-cured, bulk-fill nanocomposite restorative material, Filtek™ One Bulk Fill Restorative, 3M ESPE Dental Products, USA) in Endodontically treated posterior teeth.
In patients with endodontically treated teeth, will the Indirect Milled composite Endo-crown restorations have a better clinical performance and more wear resistance than the Direct Bulk-Fill resin composite restorations over one year?~Primary Objective: To evaluate clinical performance of different Techniques of Composite Restorations (Indirect restorations using a CAD/CAM grinding process, BRILLIANT Crios, Coltène/Whaledent AG, Switzerland or Direct a light-cured, bulk-fill nanocomposite restorative material, Filtek™ One Bulk Fill Restorative, 3M ESPE Dental Products, USA) in Endodontically treated posterior teeth.