Fracture Resistance of a New Zirconia Crown Design
Author Information
Author(s): Mashyakhy Mohammed, Adawi Hafiz Ahmed, Finer Yoav
Primary Institution: Jazan University, Saudi Arabia
Hypothesis
There are no differences between the novel crown design, its modification, and conventional full zirconia crowns in terms of compressive strength before and after access opening, initial penetration time, and mode of fracture.
Conclusion
The modified novel-design crown (zirconia composite) could be an excellent choice for new prostheses, providing easy access and good resistance to fracture before and after root canal treatment.
Supporting Evidence
- The highest fracture strength before initial penetration was recorded for zirconia porcelain crowns (760.2 ± 25.2 MPa).
- Zirconia composite crowns exhibited the shortest time for initial penetration (2.5 ± 0.8 s).
- All zirconia composite crowns showed crown fracture and core cracking, while all full zirconia crowns showed crown fracture only.
Takeaway
A new type of zirconia crown is easier to access for dental work and is strong enough to last through treatments.
Methodology
The study tested 60 zirconia crowns divided into three groups, comparing their fracture strength and penetration time using CAD/CAM technology.
Limitations
The study's test conditions may not accurately reflect real-life performance, and the results may not apply to all zirconia or composite crowns due to differences in material quality and manufacturing processes.
Statistical Information
Confidence Interval
95% CI = 81.3 to 134.4 MPa
Statistical Significance
p<0.05
Digital Object Identifier (DOI)
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