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Tooth structure should always be preserved to provide long term success in endodontic treatment. Microbial contamination through the occlusal surface leads to coronal leakage constitutes a large percentage of failed root canal treatment. Root canal treatment can decrease the strength and toughness value of dentin by around 14% due to moisture loss, alteration of collagen fibers and change in biomechanical behaviour. It is always recommended to do pretreatment evaluation of tooth to confirm the prognosis and to decide the post endodontic restoration. The primary goal of endodontic and...