THE NEW BEST RESIN COMPOSITE FOR ROOT CANAL TREATMENT IS FOUND.
Following an endodontic treatment, if the remaining tooth structure is not adequate for the stable retention of a direct core build-up material, insertion of post into the canal is a treatment option to retain the core. The post can be metal, fiber, or ceramic. Metallic posts have poor stress distribution due to differences in the elastic modulus of metal and dentin, which can occasionally cause root fracture and the potential discoloration of surrounding soft tissue. The use of glass fiber posts has advantages, such as more rapid treatment and better biocompatibility, aesthetics, corrosion resistance, and similar biomechanical properties to dentin. When loaded, adhesively luted endodonticreinforced with glass or quartzlead to better homogeneous tension distribution than rigid metal or zirconium oxide ceramic. Moreover, it has been reported that, compared with traditional metallic cast posts, glass fiber posts decrease the likelihood of irreparable root fractu...