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June 14, 2026BMC Oral HealthOpen Access

Fracture behavior of endodontically treated premolars restored with direct and indirect restorations: an in vitro study

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Authors

EGEsraa Abdel Ghaffar El GezawySBS.S. BedairKAKhaled Farouk Abbas

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Overview

In vitro study assesses fracture resistance of endodontically treated premolars, indicating lithium disilicate's superiority.

Key Points

  • This study aims to evaluate the fracture resistance of endodontically treated premolars restored with various materials.
  • 44 human maxillary premolars underwent endodontic treatment and were restored using four different materials.
  • Fracture resistance was tested using a universal testing machine and data was analyzed statistically.
  • The study groups were: Stela composite, EverX flow composite with nanohybrid, Z250 composite, and lithium disilicate endocrown.
  • Group F4 (lithium disilicate endocrown) showed the highest fracture resistance at 1427.73 ± 156.96 Newtons (P<0.0001).
  • Group F2 (EverX+Z250) had a mean fracture load of 619.87 ± 186.41 Newtons, which was superior to Group F1 (Stela) at 561.75 ± 173.74 Newtons and Group F3 (Z250) at 452.22 ± 202.72 Newtons, although not statistically significant.
  • Direct restorative materials showed no significant differences among them despite variations in their performance.

Cite This Study

Gezawy et al. (2026) studied this question.

synapsesocial.com/papers/6a2e4608b1cc60ccdea8ad3dhttps://doi.org/10.1186/s12903-026-08736-2
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Also Consider

Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context:

  1. 1Fracture resistance of endodontically treated maxillary premolars using indirect and direct composite onlays: A comparative study2024 · 2 citations
  2. 2The effect of restorative material selection and cementation procedures on the durability of endocrowns in the anterior teeth: an in-vitro study2024 · 7 citations
  3. 3Fracture Resistance of Upper Central Incisors with Different Endodontic Accesses Restored with Lithium Disilicate Partial Laminate Veneers2021 · 3 citations
  4. 4FRACTURE RESISTANCE OF FOUR DIFFERENT TYPES OF CAD/CAM LITHIUM DISILICATE ENDOCROWNS2023 · 8 citations
  5. 5Cyclic loading and load to failure of lithium disilicate endocrowns: Influence of the restoration extension in the pulp chamber and the enamel outline2020 · 25 citations