Comparative evaluation of fracture resistance of endodontically treated teeth with wedge shaped non-carious cervical lesions using different types of esthetic post: An in vitro study.

Abstract

Introduction: Background of the study: Conventionally, postcore and crown foundation systems have been employed for restoring endodontically treated teeth (ETT).

Aim: The aim of this study was to evaluate and compare the fracture resistance of ETT with wedge-shaped noncarious cervical lesions (NCCLs) using different types of esthetic posts.

Technique: Forty maxillary first premolars possessing two root canals have been randomly divided into four groups (n = 10). Thirty tooth specimens were used to generate buccal wedge-shaped NCCLs. Zirconia and prefabricated fiber posts have been cemented in Groups III and IV. In universal testing machine, the palatal cusp has been subjected to nonaxial compressive stress at 30° angle with crosshead speed of 0.5 mm/min till fracture occurred. (1) Group I - composite resin core (CRC), (2) Group II - NCCLs + CRC, (3) Group III - NCCLs + PFC + CRC, and (4) Group IV - NCCLs + custom-made zirconia post + CRC.

Results: A one-way analysis of variance/Kruskal-Wallis test was employed to compare the outcome variables between the study groups, which showed Group III's fracture resistance was noticeably greater than Group I. Finally, there has been a substantial difference (P < 0.0001) between Group IV and all other groups.

Conclusion: Maxillary premolars with NCCLs that were repaired endodontically utilizing PFCs showed higher fracture resistance than maxillary premolars without posts.