Evaluation of Glass Infiltration Speed within Dental CAD/CAM Alumina at Different Temperatures

Abstract:

Objective: to investigate glass infiltrating rates (depth/time) within dental CAD/CAM alumina at different temperatures. Methods: micron α-alumina powder was prepared with cold isostastic pressure at 250 MPa and sintered at 1450°C. The presintered alumina specimens were then infiltrated with special glass at 1150°C, 1200°C and 1250 °C. The infiltrating depths and time to form the infiltrate at the different temperatures were evaluated. Results: As the infiltrating temperature increased, the viscosity of the infiltrating glass decreased, and the infiltrating depth increased. A 1 mm infiltration depth into the presintered alumina at 1150°C, 1200°C and 1250°C required 95 min, 22 min and 8 min, respectively. Conclusion: An optimal infiltrating time required to reach a suitable infiltration depth into the presintered alumina was observed at 1200°C, an important finding for clinical applications at this commonly used furnace temperature.

• Periodical: Advanced Materials Research (Volume 177)
• Pages: 314-317
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.177.314
• Online since: December 2010
• Authors: Jie Liu, Huai Xiu Lu, Long Quan Shao, Bin Deng, Yuan Fu Yi, Jie Mo Tian, Wei Wei Zhang, Ning Wen
• Keywords: Aluminium Oxide, Dental Material, Glass Infiltration

References

[1] H. Claus: Quintessent Zahnteeh.

[2] H.F. Kappert, X. Daniel: Prothese Dentaipce N. Vol. 45 (1990), p.1.

[3] D. Stephen: J. Prosthet. Dent. Vol. 74 (1995), p.332.

[4] N. Futterknecht, V.A. Jinoian: QDT. Vol. 15 (1992), p.22.

[5] H.J. Maier: J. Can. Dent. Assoc. Vol. 57 (1991), p.22.

[6] N. Wen, S.F. Zhang, Z.Y. Wang, et al: Di-si Junyi Daxue Xuebao. Vol. 22 (2001), p.913.

[7] Z. Yu, K. Mukai, K. Kawasaki and I. Furusato: J. Ceram. Soc. Jpn. Vol. 101(1993), p.533.

[8] Y.L. Zhang. PhD thesis (Tsinghua University, Beijing, China, 1999).

[9] M. Tyszblat, U.S. Patent, 4772434. (1987).