Abstract
Objectives: To evaluate the microleakage and marginal gap of various luting materials after cementing ceramic crowns. Methods: Cervical margins of human molars were designed as circular chamfers. Cementation of full-contour ceramic crowns was conducted with zinc-phosphate cement (Harvard cement), resin cement (Panavia F 2.0) and self-adhesive resin cements (RelyX Unicem, BifixSE, MaxCem Elite, PermaCem2.0, G-Cem). Aging of specimens was performed in artificial saliva, at 37 °C for four weeks and thermocycling. The marginal gap was measured with a scanning electron microscope and silver precipitation within the microleakage. All data were compared statistically. Results: Independent of the margin preparation, the highest median value for microleakage was 320.2 μm (Harvard cement), and the lowest was 0 μm (Panavia F 2.0). The median value for enamel was 0 µm and for dentin 270.9 μm (p < 0.001), which was independent of the luting material. The marginal and absolute marginal gaps were not significantly different between the tested materials. There was no correlation between microleakage and the marginal gaps. Conclusion: Significant differences in microleakage were found between the tested luting materials (p < 0.05). Independent from the luting materials, the microleakage in dentin showed significantly higher values than in enamel.
Highlights
IntroductionMarginal gap, the oral environment, including force, thermal loading, and contact with the oral medium (saliva) influence the duration of indirect restoration (crown stability) and sealing ability in vivo
Variables such as microleakage, marginal gap, the oral environment, including force, thermal loading, and contact with the oral medium influence the duration of indirect restoration and sealing ability in vivo
Regardless of the location of the preparation line, the lowest values for microleakage were found for Panavia F2.0
Summary
Marginal gap, the oral environment, including force, thermal loading, and contact with the oral medium (saliva) influence the duration of indirect restoration (crown stability) and sealing ability in vivo. Microleakage characterizes the marginal sealing [1,2], and the marginal gap characterizes the marginal adaptation [3]. The marginal gap depends on the surface characteristics and type of luting agent [6]. Knowledge about the luting quality and characteristics of the different classes of materials for connecting the tested surface dentin or enamel with the full crown helps to achieve the long-term effect by cementation and to develop new classes of luting materials for improving clinical success [3,4,5]
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
