Microleakage of Different Self-Adhesive Materials for Lithium Disilicate CAD/CAM Crowns

Materials

Ella A. Naumova³  Alexander Valta⁴  Katharina Schaper²  Wolfgang. H. Arnold³  Andree Piwowarczyk¹ 

[1] Department of Prosthodontics, Faculty of Health, Witten/Herdecke University, Alfred Herrhausenstrasse 44, 58455 Witten, Germany; E-Mail:;Institute for Medical Biometry and Epidemiology, Witten/Herdecke University, Alfred Herrhausenstrasse 50, 58448 Witten, Germany; E-Mail:;Department of Biological and Material Sciences in Dentistry, Faculty of Health, Witten/Herdecke University, Alfred Herrhausenstrasse 44, 58455 Witten, Germany; E-Mail:;Z-Point Dr. Prünte und Partner Bergpfad 7, 59423 Unna, Germany; E-Mail:

关键词: luting materials;    microleakage;    marginal gap;    marginal adaptation;    marginal sealing;    CAD/CAM crowns;    indirect restoration;    cementation;   

DOI  :  10.3390/ma8063238

来源: mdpi

【 摘 要 】

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.

【 授权许可】

CC BY   
© 2015 by the authors; licensee MDPI, Basel, Switzerland.