Clinical and Radiographic Evaluation of Resin Endocrown as Long Term Interim Restoration Versus Stainless Steel Crown for Endodontically Treated First Permanent Molar in Children: Randomized Controlled Pilot Study.

Inclusion Criteria: * Cooperative children in age range from 10 to 13 years * Mandibular first permanent molar indicated for root canal treatment with closed apex. * Presence of at least two to three sound walls of tooth. * Absence of internal or external pathologic root resorption. * Normal occlusion without any para-functional habits. * Parent or guardian agree for participant in the study Exclusion Criteria: * Excessive mobility. * Children with underlying systemic disease. * Children with special health care needs. * Poor oral hygiene.