Comparative evaluation of efficiency of 3D printed resin and prefabricated zirconia crown as a final restoration for endodontically treated primary molars-: A randomised controlled trial.

This study is a double blind, prospective randomised controlled trial evaluating the efficacy of 3D printed resin crown and prefabricated zirconia crown as a permanent restoration in primary molars. This study is the first study to use 3D printed resin crown using NEXT DENT C&B microfilled hybrid as a final restoration in primary molars after endodontic treatment. The 3D printed resin crowns are being routinely used in adults as an interim prosthesis and the fact that the bite force in children is almost 3 times less than in adults it would suffice as a final restoration in children. Furthermore, invitro studies have proven that NEXT DENT C&B microfilled hybrid resin have sufficient fracture resistance which exceeds the maximum bite force in mixed dentition by almost three times. Thus, using 3D printing resin crowns will give a more precise accurate proximal contact points and marginal fit according to the patient’s morphology which is not possible with prefabricated crowns.The primary objective is to assess the functional,biological and aesthetic parameters of the crowns in primary molars.