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Marginal Seating of Zirconium Monolithic Crown Restorations Utilising Different Types of Luting Agents - A
Zahraa M Al-Hawwaz1, Farah Adnan Taha1, Adel F Ibraheem2
1Department of Restorative and Esthetic Dentistry, College of Dentistry, University of Baghdad, Baghdad, Iraq.
Background:
Marginal adaptation plays a critical role in the clinical success of ceramic inlays, and several factors, including the type and composition of luting cement, can influence the marginal fit and overall integrity of restorations.
Aim Of The Study:
This study aimed to investigate the effects of varying composite luting cement compositions on the marginal adaptation of Cerec inlays.
Materials And Methods:
A total of 40 healthy maxillary first premolars were used, divided into three groups according to the type of cement: Group A (3M U200), Group B (BISCEM), and Group C (Riva GIC), with eight teeth in each group. The null hypothesis stated that the type of cement would not affect the marginal adaptation of the ceramic systems.
Results:
One-way ANOVA analysis (F = 104.577; P = 0.000) revealed that the vertical marginal discrepancy (VMD) was significantly influenced by the type of cement and the phases of manufacturing and cementation. Group B (BISCEM) showed the lowest mean marginal discrepancy at 81.69875 μm. All tested groups exhibited VMD values within clinically acceptable ranges. Two-way ANOVA and Bonferroni tests were used to analyse the influence of cement space thickness on crown retention and to determine statistically significant differences between the groups.
Conclusion:
The type of luting cement significantly affects vertical marginal adaptation due to differences in viscosity, film thickness, and interaction with water, highlighting the importance of selecting appropriate cement materials to ensure optimal marginal fit of ceramic restorations.
