Majid Akbari - Associate Professor, Dental Research Center, Department Operative Dentistry Mashhad University of Medical Sciences, Mashhad, Iran
Hamideh Ameri - School of Dentistry, Mashhad University of Medical Sciences, Mashhad, Iran
Hasan Jamali - School of Dentistry, Mashhad University of Medical Sciences, Mashhad, Iran
Ali Asghar Gholami - School of Dentistry, Mashhad University of Medical Sciences, Mashhad, Iran
Sara Majidinia - Assistant Professor, Dental Research Center, Department Operative Dentistry Mashhad University of Medical Sciences, Mashhad, Iran

Background: Endodontically treated teeth need to be restored in a manner to provide protection for the remaining tooth structurebut would also allow the restoration of esthetic and functional demands.Objectives: This study evaluates the clinical success rate of endodontically treated premolars restored with different techniques.Methods: In this study, 96 participants were included with indication of endodontic treatment of one maxillary or mandibularpremolar. Only cases with premolars along with MOD Class II carious lesions and preserved cusp structure were recruited. Afterendodontic treatment subjects were randomly assigned to one of the following restoration methods: (1) composite restorationwithout any cusp reduction (2) Composite associated with a fiber reinforced composite (FRC) post (3) capping the buccal and lingualcusp and composite restoration. Subjects were recalled for the clinical and radiographical evaluations with modified USPHS criteriaafter three, six and 12 months.Results: During the evaluation period, all the three methods of restoration, achieved the Alpha degree in term of modified USPHScriteria.Conclusions: The clinical success rates of endodontically treated premolars restored with fiber posts and direct composite restorations,direct composite restorations with cusp cappingandsimple direct composite restoration were perfect after one year of followupevaluation.

Cusp Capping, Direct Composite Restoration, Endodontically Treated Premolar, FRC Post