Fracture Resistance of Endodontically Treated Anterior Teeth Restored with Different Post Systems: An in Vitro Study

Abstract

Objective: This in vitro study aimed to evaluate the fracture resistance of endodontically treated maxillarycentral incisors with different post systems.Methods: Fifty-six extracted intact maxillary permanent central incisors were used, treated endodontically (except for the control group), and distributed into the following seven test groups (n=8) depending on the posttype: UHT (control group: root-filled teeth without endodontic post), ZRP (prefabricated zirconia post), GFP(prefabricated glass fiber post), CFP (prefabricated carbon fiber post), CPC (custom-made cast post and core),TIP (prefabricated titanium post), and MIP (prefabricated mixed post). The specimens were loaded in a universaltesting machine until fracture occurrence. Failure loads were then analyzed with one-way analysis of variance(ANOVA), followed by multiple comparisons by using Tukey’s honest significant difference test (α=0.05).Results: Mean (SD) failure loads for groups ranged from 524±73.2 N for CPC to 764.1±156 N for GFP. One-wayANOVA showed significant differences in terms of fracture resistances among groups (P