Fracture Resistance of Monolithic Zirconia Crowns After Endodontically Access Preparation on Premolars Teeth

Abeer Tambah, Postgraduate student, Department of Fixed Prosthodontics, Faculty of Dentistry, Mansoura University, Dakahlia, EgyptFollow
Nesma Mohamed Magdy El-Gohary, Assistant Professor, Department of Fixed Prosthodontics, Faculty of Dentistry, Mansoura University, Dakahlia, Egypt
Walid Abd El-Ghafar Al-Zordk, Professor, Department of Fixed Prosthodontics, Faculty of Dentistry, Mansoura University, Dakahlia, Egypt

Article Type

Original Article

Section/Category

Restorative Dentistry

Abstract

Objective The present study aimed to evaluate the fracture resistance of endodontically treated premolars with monolithic zirconia crowns following standardized endodontic access cavity preparation and restoration with either composite or ceramic inlays. Materials and Methods Twenty extracted human premolars were selected and endodontically treated after creating standardized ovoid access cavities through the zirconia crowns using a highspeed diamond bur under water cooling. Specimens were randomly divided into two groups (n=10 per group): Group 1 restored with bulk-fill composite resin and Group 2 restored with CAD/CAM-fabricated ceramic inlays. Following thermocycling (10,000 cycles, 5–55 °C) and cyclic mechanical loading (240,000 cycles, 50 N), fracture resistance was tested using a universal testing machine. Data were statistically analyzed using Student’s t-test at a significance level of p

Keywords

Ceramic inlay; Composite filling; Fracture resistance; Monolithic zirconia; Premolars

How to Cite This Article

Tambah A , El-Gohary N , Al-Zordk W . Fracture Resistance of Monolithic Zirconia Crowns After Endodontically Access Preparation on Premolars Teeth. Mans J Dent. 2025; 12(4):
Available at: https://doi.org/10.61793/2812-5479.1170