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Review
. 2017 Sep;96(10):1085-1091.
doi: 10.1177/0022034517720658. Epub 2017 Jul 21.

New Resins for Dental Composites

A P P Fugolin  1 , C S Pfeifer  1
Affiliations
Review

New Resins for Dental Composites

A P P Fugolin et al. J Dent Res. 2017 Sep.

Abstract

Restorative composites have evolved significantly since they were first introduced in the early 1960s, with most of the development concentrating on the filler technology. This has led to improved mechanical properties, notably wear resistance, and has expanded the use of composites to larger posterior restorations. On the organic matrix side, concerns over the polymerization stress and the potential damage to the bonded interface have dominated research in the past 20 y, with many "low-shrinkage" composites being launched commercially. The lack of clinical correlation between the use of these materials and improved restoration outcomes has shifted the focus more recently to improving materials' resistance to degradation in the oral environment, caused by aqueous solvents and salivary enzymes, as well as biofilm development. Antimicrobial and ester-free monomers have been developed in the recent past, and evidence is mounting for their potential benefit. This article reviews literature on the newest materials currently on the market and provides an outlook for the future developments needed to improve restoration longevity past the average 10 y.

Keywords: BisGMA; composite resins; methacrylates; permanent dental restorations; polymerization; stress.

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Conflict of interest statement

The authors declare no potential conflicts of interest with respect to the authorship and/or publication of this article.

Figures

Figure 1.
Figure 1.
Top: Molecular structures of BisGMA (bisphenol A glycidyl dimethacrylate) (left) and TEGDMA (triethylene glycol dimethacrylate) (right). Bottom: Molecular structure of alternative monomers currently used in commercial products. (A) Oxirane (Filtek LS; 3M-ESPE), (B) TCD-urethane (Venus Diamond; Heraeus Kulzer), (C) dimeracid dimethacrylate (N’Durance; ConfiDental-Septodont), and (D) DuPont DX-511 (Kalore; GC America).
Figure 2.
Figure 2.
Diagram for network modifications leading to stress reduction with the use of thiourethane oligomers (A) and covalent adaptable networks formed via addition-fragmentation chain transfer (B).
Figure 3.
Figure 3.
General molecular structure of materials being proposed as alternatives to methacrylates for dental applications.
Figure 4.
Figure 4.
General scheme for the crack-healing mechanism using liquid-bearing microcapsules.
See this image and copyright information in PMC

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