BMC oral health
Effect of different intra-canal restorative techniques on the fracture resistance of endodontically treated anterior teeth: an in-vitro comparative study
Von Saad MEMA, Hamed NHM und Anwar MN.
Inhalt auf Englisch
Abstract
Objective
To evaluate the effect of different intra‑canal restorative techniques on the fracture resistance of endodontically treated anterior teeth and to assess the influence of marginal ridge loss on their mechanical behavior.
Materials and methods
Ninety extracted sound maxillary central and lateral incisors were selected and randomly divided into five groups. Ten teeth were left intact to serve as the control group, while the remaining teeth were endodontically treated, obturated, and randomly allocated into four groups according to different intra‑canal restorative techniques; (1) PS: packable short fiber‑reinforced composite, (2) FP: prefabricated glass fiber posts, (3) FS: flowable short fiber‑reinforced composite, (4) DC: dual‑cure composite core material, each group was further subdivided according to marginal ridge integrity into two subgroups (n = 10), intact marginal ridges (I) and removed marginal ridge (R). All specimens were subjected to thermocycling for 10,000 cycles. Fracture resistance testing was carried out using a universal testing machine with a load applied at 135° to the long axis of the tooth until the fracture occurred. Fracture patterns were examined using a stereomicroscope and classified as favorable and unfavorable fractures. The data were statistically analyzed using two-way ANOVA, followed by Tukey's post hoc test and fracture patterns were analyzed using Fisher's exact test, with the significance level set at α = 0.05.