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Abstract

In this article we are looking at the development of composite restorative materials. We discuss the composition of the resin matrix, and describe the introduction of some new monomers. We also comment on the development of fillers. Some materials are discussed in more detail. Bulk-fill materials do not seem to be essentially different to traditional composites with regards to the composition.

Curing of the materials is important to achieve optimal properties. We give tips and advice on which factors that affect the curing, and explain some of the effects caused by insufficient curing. A sufficiently long curing time, without using a curing device with very high irradiance, seems to be the best choice.

The material properties are briefly discussed with reference to the curing and the composition of the materials. Leakage of monomers from the materials is discussed, while possible biological effects of leakage are the subject of another article in this series. Mechanical properties are briefly reviewed.

In summary, there seems to be an ongoing, although sometimes slow, process of development of the composite restoratives since their introduction in the 1960’s. Throughout time, the focus of the developing work has changed, for instance on new monomers for improved handling properties and low shrinkage, new fillers, both types and sizes, for better mechanical properties and improved polishability, alternative materials and compositions for better biocompatibility. The trends of today seem to be on the development of self-adhesive composites and composites with bio-active effects.


References

Kompositte materialer — basale egenskaber
Kopperud HBM, Peutzfeldt A
Nor Tannlegeforen Tid 2016; 116: 848—56

Kompositte materialer — basale egenskaber
Kopperud HBM, Peutzfeldt A
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Kompositmaterial – basala egenskaper
Kopperud HBM, Peutzfeldt A
Tandläkartidningen  2017; 4: 68-76