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Basma Osama Salem1, Dina Magdy Elshehawi1, Gihan Abdelhady Elnaggar1
1Faculty of dentistry, Cairo university, department of fixed prosthodontics, Giza, Egypt.
Brazilian Dental Journal
|December 8, 2022
Summary
Zirconia-reinforced lithium silicate (Celtra Press) and lithium disilicate (IPS e-max Press) ceramic crowns show comparable fracture resistance. Both materials meet clinical standards for posterior dental restorations.
Area of Science:
- Dental Materials Science
- Biomaterials Engineering
- Ceramic Restorations
Context:
- All-ceramic restorations are increasingly used in dentistry due to their aesthetic properties.
- Evaluating the mechanical properties, specifically fracture resistance, is crucial for clinical longevity.
- Zirconia-reinforced lithium silicate and lithium disilicate are popular materials for dental crowns.
Purpose:
- To compare the fracture resistance of Celtra Press (zirconia-reinforced lithium silicate) against IPS e.max Press (lithium disilicate) under simulated oral conditions.
- To assess the clinical suitability of these materials for posterior dental applications.
- To provide data for material selection in restorative dentistry.
Summary:
- Fourteen ceramic crowns (7 Celtra Press, 7 IPS e.max Press) were fabricated, cemented, and subjected to thermocycling and cyclic loading.
- The crowns were then loaded to fracture using a universal testing machine.
- Lithium disilicate crowns exhibited a mean fracture resistance of 1706.01 ±154.32 N, while Celtra Press crowns showed 1550.67 ±196.71 N (P > 0.05).
Impact:
- Zirconia-reinforced lithium silicate demonstrates comparable fracture resistance to lithium disilicate.
- Both materials exhibit fracture resistance values suitable for clinical use in posterior restorations.
- This study aids clinicians in selecting durable all-ceramic materials for demanding dental applications.