A new composite for daily dental treatment

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INTRODUCTION

I conducted a clinical study on a new colorless, universal, light-curing and shade-adaptive composite. We wanted to evaluate this type of innovative and trending technology from at least 2 perspectives: first, how it works to match the shade spectrum of patients’ teeth in a practically cosmetic way, and second, from a clinical perspective. , regarding the other advantages offered to the dentist via its use in the office which saves time and effort and the possibility of increasing the number of patient cases. I chose to look at a new product called SpheriChrome (Oxford Scientific) for this purpose.

SpheriChrome is based on an innovative, tint-adaptive and state-of-the-art solution for color matching characterized by the principle of natural and universal structural coloring that occurs in nature. It has been adapted for use in all classes of dental restorations, dental uses and matching shades to patient dentitions. In living things, “structural coloration”, as it may be called, is the production of color by microscopically structured surfaces fine enough to interfere with visible light, sometimes in combination with pigments.

The exact size and shape of the filler must be controlled to generate a red to yellow color without the use of dyes or pigments when ambient light passes through the composite. The red to yellow color generated by the spherical fillers can combine with the selected color of the patient’s surrounding dentition, giving a perfect match.

From a natural color product and principle, an adaptive nanofiller produces multiple shades for multiple uses to virtually match patients’ dentitions to produce excellent cosmetic restorations. White or ambient light is refracted and reflected by the color spectrum of the patient’s dentition, resulting in a virtually perfect match. This virtually eliminates the need to match shades with every restoration, saving a lot of chairside time when matching colors with a shade guide, even in different lighting conditions.

Today’s composites work primarily by adding red and yellow dyes or pigments to resins and fillers to simulate the colors or shades of teeth. This requires the dentist to have a considerable inventory of shades needed to properly deliver the right color for a restoration.

SpheriChrome uses structural color with 200nm spherical fillers. The fillers are the exact size and shape needed to generate a red to yellow color when ambient light passes through the composite without the need to add pigments or dyes. This color generation by spherical fillers combines with the reflected colors of patients’ dentitions, creating the perfect match from Al to D4 and even more shades.

Not only is the time saving in shade matching a big plus, but the need to no longer stock various shades of composites reduces inventory and reduces storage space and waste. Of course, if one wishes to change the shade of the natural tooth, shaded composites are always necessary.

CASE REPORTS

Case 1

Figure 1 shows a preoperative view of a mature patient who wished to improve the appearance and alignment of her mandibular anterior teeth without orthodontic treatment. She chose direct composite veneers because they were more affordable than ceramic alternatives.

The 8 most anterior teeth were reshaped to make room for approximately 0.5 mm of composite (Figure 2). I started by constructing a direct veneer for tooth #25 using SpheriChrome. SpheriChrome blocker (Oxford Scientific) was used only in the incisor and lingual areas, and regular SpheriChrome was applied to the entire facial surface. Figure 3 shows the finished direct veneer for #25. The final result after all 8 mandibular teeth have been coated with SpheriChrome is shown in Figure 4.

You can see the fine glossy finish that naturally matched the dentition. This was easily accomplished as SpheriChrome exhibits characteristics such as a microfill composite, polishing quickly and aesthetically and resulting in a smooth, fine-gloss surface.

I found the consistency of SpheriChrome makes it easy to place. This was also an advantage when placing, knowing that if I needed to modify the handling slightly, I could use a standard composite heater to adjust or change the handling properties to my personal preference. The ability to change viscosity and flow rate by heating, if needed, gives me excellent marginal adaptation. The time saved by eliminating the tooth-matching process has resulted in shorter chair time, increased patient comfort and reduced worry.

I liked the idea that there was a SpheriChrome blocker available to use in the few situations where it might be needed to mask tooth discolorations or for extensive class III and IV cavities. SpheriChrome Blocker can also be used as a first layer for Class I, II and V cavities.

Case 2

In Figure 5 you can see a patient’s maxillary central and lateral incisors before treatment. The patient wanted closure of the central diastema without orthodontic treatment and a more “normal” smile. In order to provide correct proportions, it was decided to place direct composite veneers for the 4 incisors. Minimal preparation was done using fine diamond burs. The prepared teeth are shown in Figure 6. SpheriChrome Blocker was used only in the interproximal area between the central incisors. Regular SpheriChrome was applied to all facial surfaces of each tooth. The end result can be seen in Figure 7.

CONCLUSION

The color matching technology of this composite to mimic the patient’s natural dentition appealed to me the more I used it. SpheriChrome produces excellent restorations with less effort and easily integrates into the daily procedure while delivering on claims of eliminating shade matching, saving time and improving restorations.

The fact that it can be used in all different classes of restorations adds to its versatility. Faced with several types of restorations and different patient needs, this blocker is available and its variable viscosity by heating makes it convenient to use and adapts not only to my needs but also to the needs of the patient.

Excellent restorations, reduced inventory and increased patient flow to the practice are just a few of the many reasons why I love SpheriChrome. But the most important reason why I like it is the quality of the restoration, as you have seen in this article.

ABOUT THE AUTHOR

Dr. Nash maintains a private practice in Huntersville, NC, where he focuses on cosmetic and cosmetic dental care. An accredited member of the American Academy of Cosmetic Dentistry and a graduate of the American Board of Dental Aesthetics, he lectures internationally on cosmetic dentistry topics and has authored chapters in 2 dental textbooks. He is a co-founder of the Nash Institute for Dental Learning in Huntersville and is a consultant for many dental product manufacturers. He can be reached at (704) 895-7660, by email at [email protected] or through the thenashinstitute.com website.

Disclosure: Dr. Nash received an honorarium from Oxford Scientific for this article.

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