Surefil SDR flow A Revolutionary Solution for a Complex Problem

Author : Dental Product Shopper
Published Date 10/25/2011
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Surefil SDR flow A Revolutionary Solution for a Complex Problem

We have been using flowable composites in dentistry for several years. It is common practice to line a filling with a flowable resin for a handful of valid reasons; however, some clinicians use flowables for reasons that are questionable. For instance, using a flowable composite to fill the box of a Class II filling is not recommended because of the higher shrinkage of flowable materials. Also, flowable materials typically have a higher concentration of resin compared to more viscous traditional composites.

This higher resin matrix typically leads to more shrinkage as the material polymerizes as well as less resistance to wear compared to traditional composites. Still, many clinicians use flowable composites as a conservative liner with great success.

Judicious and appropriate use of flowable materials is critical because we have seen an increase in recurrent decay since the addition of flowables into our armamentarium. Attention to detail is important if we expect our restorations to last.

Shrinkage vs Shrinkage Stress

It is worth noting that shrinkage and shrinkage stress are distinctly different. Currently, all composites shrink when they cure. It?s unavoidable. However, there are several different approaches to managing this. Some companies try to add as much filler as possible to minimize the amount of resin in the material so that it will not shrink as much volumetrically. Other manufacturers address the problem by creating entirely new larger-molecule monomers. Yet others try to prepolymerize their material, and then grind it up and re-combine it with the original material. And finally, several companies try different combinations of all of the above.

And Now for Something Completely Different

DENTSPLY Caulk addresses the problem of shrinkage with Surefil SDR flow, a revolutionary new product with a polymer that greatly reduces the stress in the material as it is polymerizing. SDR stands for Stress Decreasing Resin, and it allows for a more relaxed matrix during placement and after cure through a unique ?polymerization modulator.? Surfil SDR flow has been approved for a 4 mm depth of cure, which can greatly increase placement efficiency. However, it is worth noting that just because a material can be bulk-filled, doesn?t mean it should be. We must still use good judgment when placing any flowable composite.

Surefil SDR flow comes in several colors to closely match a patient?s actual tooth color. In addition, the unique viscosity of this material is called ?selfleveling,? which in my experience means less manipulation after delivery and fewer bubbles. This, in turn, leads to less flowable material at the margins and more traditional composite in this vulnerable area.

A Helpful Addition

I find Surefil SDR flow to be very helpful in my practice. In addition to time savings, I?m confident that I?m not introducing stress into my fillings. If you are using flowable composites, I would encourage you to give this one a try.

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