Research Article

New monolithic post-core concept: a comparison of prefabricated and CAD-CAM fabricated post-cores

Volume: 60 Number: 1 June 17, 2026
EN

New monolithic post-core concept: a comparison of prefabricated and CAD-CAM fabricated post-cores

Abstract

Purpose

The aim of this in vitro study was to evaluate the fracture and pull-out strengths of various post–core systems.

Materials and methods

Forty-eight endodontically treated maxillary central incisors were assigned to three post–core groups: fiber post–composite core (RelyX) (FC), prefabricated monolithic fiber post–core (FiberSite) (MF), and CAD-CAM fabricated customized monolithic zirconia post–core (InCoris ZI) (MZ). Post–core designs were standardized according to the FiberSite system. After cementation (RelyX U200), the samples were divided into two mechanical test groups—fracture strength and pull-out strength (n = 8 per subgroup). Tests were performed at a crosshead speed of 1 mm/min, and failure types were recorded.

Results

For the fracture strength test, the highest values (N) were obtained in the MZ group. The difference between MF and FC was not statistically significant (p = 0.190). For the pull-out test, statistically significant differences (N) were found among all groups (p< 0.001). The MZ group exhibited predominantly catastrophic failures in both tests, whereas the MF and FC groups mainly showed Type II and Type III failures.

Conclusion

Within the limitations of this study, the FiberSite system appears to have clinical potential for restoring severely damaged teeth. This system offers a balance of mechanical strength and favorable failure modes compared with CAD-CAM zirconia post–cores, which demonstrated catastrophic failures, and fiber post–composite cores, which exhibited lower strength values.

Keywords

Supporting Institution

Kocaeli University

Project Number

None

Ethical Statement

The approved Ethical Form has been loaded as a supplemantary file.

References

  1. Soares CJ, Soares PV, Santos-Filho PCF, Castro CG, Magalhaes D, Versluis A. The influence of cavity design and glass fiber posts on biomechanical behavior of endodontically treated premolars. J Endod 2008;34:1015-9.
  2. Tang W, Wu Y, Smales RJ. Identifying and reducing risks for potential fractures in endodontically treated teeth. J Endod 2010;36:609-17.
  3. Dietschi D, Duc O, Krejci I, Sadan A. Biomechanical considerations for the restoration of endodontically treated teeth: a systematic review of the literature--Part 1. Composition and micro- and macrostructure alterations. Quintessence Int 2007;38:733-43.
  4. Lassila LV, Tanner J, Le Bell A.M, Narva K, Vallittu PK. Flexural properties of fiber reinforced root canal posts. Dent Mater 2004;20:29-36.
  5. Zarow M, Devoto W, Saracinelli M. Reconstruction of endodontically treated posterior teeth-with or without post? Guidelines for the dental practitioner. Eur J Esthet Dent 2009;4:312-27.
  6. MegaDental, “Brochure products,” May 2019.
  7. URL: ‘https://www.fibersitepost.com/depliantsgrande.pdf’. Accessed July 2021.
  8. Özyürek T, Topkara C, Koçak İ, Yılmaz K, Gündoğar M, Uslu G. Fracture strength of endodontically treated teeth restored with different fiber post and core systems. Odontology 2020;108:588-95.

Details

Primary Language

English

Subjects

Prosthodontics

Journal Section

Research Article

Publication Date

June 17, 2026

Submission Date

February 13, 2025

Acceptance Date

October 20, 2025

Published in Issue

Year 2026 Volume: 60 Number: 1

APA
Kanat Ertürk, B., Sarıdağ, S., Bayram, S., Seferli, Z., & Helvacioglu-yigit, D. (2026). New monolithic post-core concept: a comparison of prefabricated and CAD-CAM fabricated post-cores. European Oral Research, 60(1), 162-168. https://doi.org/10.26650/eor.20251638441
AMA
1.Kanat Ertürk B, Sarıdağ S, Bayram S, Seferli Z, Helvacioglu-yigit D. New monolithic post-core concept: a comparison of prefabricated and CAD-CAM fabricated post-cores. EOR. 2026;60(1):162-168. doi:10.26650/eor.20251638441
Chicago
Kanat Ertürk, Burcu, Serkan Sarıdağ, Sinem Bayram, Ziya Seferli, and Dilek Helvacioglu-yigit. 2026. “New Monolithic Post-Core Concept: A Comparison of Prefabricated and CAD-CAM Fabricated Post-Cores”. European Oral Research 60 (1): 162-68. https://doi.org/10.26650/eor.20251638441.
EndNote
Kanat Ertürk B, Sarıdağ S, Bayram S, Seferli Z, Helvacioglu-yigit D (June 1, 2026) New monolithic post-core concept: a comparison of prefabricated and CAD-CAM fabricated post-cores. European Oral Research 60 1 162–168.
IEEE
[1]B. Kanat Ertürk, S. Sarıdağ, S. Bayram, Z. Seferli, and D. Helvacioglu-yigit, “New monolithic post-core concept: a comparison of prefabricated and CAD-CAM fabricated post-cores”, EOR, vol. 60, no. 1, pp. 162–168, June 2026, doi: 10.26650/eor.20251638441.
ISNAD
Kanat Ertürk, Burcu - Sarıdağ, Serkan - Bayram, Sinem - Seferli, Ziya - Helvacioglu-yigit, Dilek. “New Monolithic Post-Core Concept: A Comparison of Prefabricated and CAD-CAM Fabricated Post-Cores”. European Oral Research 60/1 (June 1, 2026): 162-168. https://doi.org/10.26650/eor.20251638441.
JAMA
1.Kanat Ertürk B, Sarıdağ S, Bayram S, Seferli Z, Helvacioglu-yigit D. New monolithic post-core concept: a comparison of prefabricated and CAD-CAM fabricated post-cores. EOR. 2026;60:162–168.
MLA
Kanat Ertürk, Burcu, et al. “New Monolithic Post-Core Concept: A Comparison of Prefabricated and CAD-CAM Fabricated Post-Cores”. European Oral Research, vol. 60, no. 1, June 2026, pp. 162-8, doi:10.26650/eor.20251638441.
Vancouver
1.Burcu Kanat Ertürk, Serkan Sarıdağ, Sinem Bayram, Ziya Seferli, Dilek Helvacioglu-yigit. New monolithic post-core concept: a comparison of prefabricated and CAD-CAM fabricated post-cores. EOR. 2026 Jun. 1;60(1):162-8. doi:10.26650/eor.20251638441