Sammanfattning
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.