Fracture Resistance of Anterior Endocrown vs Custom One Piece Post Crown (In vitro study)

Document Type : Original Article

Authors

1 Msc Student, Faculty of Dentistry, Minia University

2 Associate Professor of Fixed Prosthodontics, Faculty of Dentistry, Minia University, Minia, Egypt.

3 Lecturer of Fixed Prosthodontics minya university

4 Lecturer of Fixed prosthodontics, Faculty of Dentistry, Assiut University, Assiut, Egypt.

Abstract

ABSTRACT
Objective: to evaluate fracture resistance of anterior endocrown versus custom-made one-piece post crown (Hybrid Post Crown), which were fabricated from two different materials (Hybrid ceramics and Lithium disilicate ceramics).
Materials and methods: Sixty freshly extracted upper central incisor teeth were selected; all root canals endodontically treated then divided into two main groups (30 samples each) according to the type of restoration used. The first group (E) was restored with Endocrown (n=30). The second group (P) restored with custom one-piece Post Crown (n=30). Each group was subdivided into two subgroups (15 samples each) according to the type of material used, Subgroup EG: anterior endocrown fabricated from grandioblocs. Subgroup EE: anterior endocrown fabricated from E-max, Subgroup PG: custom one-piece post crown fabricated from grandioblocs, Subgroup PE: custom one-piece post crown fabricated from E-max. Fracture resistance test was done to provide a compressive mode of load at angle 45 degree from long axis of the tooth to all specimens in a universal testing machine. A statistical analysis performed by SPSS 20 (Statistical Package for Scientific Studies, SPSS, Inc., Chicago, IL, USA) for Windows.
Results: The highest mean value was recorded in Anterior endocrown fabricated from E-max (EE) (1396.98±93.97N), and the lowest mean value in Custom one-piece post crown made from Grandio blocs (PG) (913.86±116.09N)
Conclusion: There is no statistically significant difference in the fracture resistance between anterior Endocrown and Monoblock post crown, restorations fabricated from E-max cad showed higher resistance to fracture than that made from Grandioblocs in both types of restorations.

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Egyptian Dental Journal
Volume 71, Issue 3 - Serial Number 4
Fixed Prosthodontics, Removable Prosthodontics and Dental Materials
July 2025
Pages 2457-2468

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