Skip to main page content
U.S. flag

An official website of the United States government

Dot gov

The .gov means it’s official.
Federal government websites often end in .gov or .mil. Before sharing sensitive information, make sure you’re on a federal government site.

Https

The site is secure.
The https:// ensures that you are connecting to the official website and that any information you provide is encrypted and transmitted securely.

Access keys NCBI Homepage MyNCBI Homepage Main Content Main Navigation
Review
. 2016 Feb;52(1):2-13.
doi: 10.1016/j.jdsr.2015.07.001. Epub 2015 Sep 1.

Dental prostheses mimic the natural enamel behavior under functional loading: A review article

Ahmed A Madfa  1 , Xiao-Guang Yue  2
Affiliations
Review

Dental prostheses mimic the natural enamel behavior under functional loading: A review article

Ahmed A Madfa et al. Jpn Dent Sci Rev. 2016 Feb.

Abstract

Alumina- and zirconia-based ceramic dental restorations are designed to repair functionality as well as esthetics of the failed teeth. However, these materials exhibited several performance deficiencies such as fracture, poor esthetic properties of ceramic cores (particularly zirconia cores), and difficulty in accomplishing a strong ceramic-resin-based cement bond. Therefore, improving the mechanical properties of these ceramic materials is of great interest in a wide range of disciplines. Consequently, spatial gradients in surface composition and structure can improve the mechanical integrity of ceramic dental restorations. Thus, this article reviews the current status of the functionally graded dental prostheses inspired by the dentino-enamel junction (DEJ) structures and the linear gradation in Young's modulus of the DEJ, as a new material design approach, to improve the performance compared to traditional dental prostheses. This is a remarkable example of nature's ability to engineer functionally graded dental prostheses. The current article opens a new avenue for recent researches aimed at the further development of new ceramic dental restorations for improving their clinical durability.

Keywords: Alumina; Dental ceramics; Dental multilayer; Dentino-enamel junction; Functionally graded materials; Zirconia.

PubMed Disclaimer

Figures

Figure 1
Figure 1
Models of biocomposites. (a) Perfectly staggered mineral inclusions embedded in protein matrix. (b) A tension–shear chain model of biocomposites in which the tensile regions of protein are eliminated to emphasize the load transfer within the composite structure. (c) The free body diagram of a mineral crystal.
Figure 2
Figure 2
Elastic modulus distribution in natural dentino-enamel junction.
Figure 3
Figure 3
Morphology of the graded zone. (a) Schematic of graded structure. (b) Section view of graded zone of glass-infiltrated yttria stabilized zirconia.
Figure 4
Figure 4
Schematic of the conventional sharp restoration and the new graded approach.
Figure 5
Figure 5
Cross-sectional view of a graded glass-alumina in (a) and graded glass-zirconia structure (b), respectively.
See this image and copyright information in PMC

References

    1. Lawn B.R., Deng Y., Thompson V.P. Use of contact testing in the characterization and design of all-ceramic crown like layer structures: a review. J Prosthet Dent. 2001;86:495–510. - PubMed
    1. Studart A.R., Filser F., Kocher P., Gauckler L.J. In vitro lifetime of dental ceramics under cyclic loading in water. Biomaterials. 2007;28:2695–2705. - PubMed
    1. Rahaman M.N., Li Y., Bal B.S., Huang W. Functionally graded bioactive glass coating on magnesia partially stabilized zirconia (Mg-PSZ) for enhanced biocompatibility. J Mater Sci Mater Med. 2008;19:2325–2333. - PubMed
    1. Akagi M., Nakamura T., Matsusue Y., Ueo T., Nishijyo K., Ohnishi E. The bisurface total knee replacement: a unique design for flexion. Four-to-nine-year follow-up study. J Bone Joint Surg Am. 2000;82A:1626–1633. - PubMed
    1. Garino J.P. Modern ceramic-on-ceramic total hip systems in the United States: early results. Clin Orthop Relat Res. 2000:41–47. - PubMed

LinkOut - more resources