While making Class I and Class II restorations faster and easier, the SDR technology in SDR Plus material still provides excellent long-term reliability in several 5- and 6-year clinical studies. In fact, the long-term survival rates of bulk fill restorations with SDR technology proved to be equivalent to those of restorations done in the conventional layering technique, highlighting SDR Plus as a quality and durable filling material.

Split mouth studies by J.W.V van Dijken and U. Pallesen (1,2)
During the 6-year follow-up, a total of 98 Class I and Class II restorations were evaluated at recall. 49 using SDR and ceram.x SphereTEC in the bulk-fill technique against the same number using just ceram.x SphereTEC composite in the layering technique. The observers concluded that SDR was clinically safe, gave highly acceptable clinical durability, and noted that the clinical performance and failure rate was equivalent to conventional layering (3 failures in both test and control group).

During the 5-year follow-up, a total of 183 Class I and Class II restorations were evaluated at recall. 92 using SDR and ceram.x SphereTEC in the bulk-fill technique against 91 using just ceram.x SphereTEC composite in the layering technique. The observers concluded that both restorative techniques showed good surface, marginal stability and colour stability. They also mentioned that there was no statistically different annual failure rates between the bulk-fill and layering technique, and all restorations successfully resulted in no post-operative sensitivities.

“The use of a 4 mm incremental technique with the flowable bulk-fill resin composite showed during the 5-year follow up slightly better, but not statistically significant, compared to the conventional 2mm layering technique in posterior resin composite restorations.”(2)

36 month clinical trial results by J. Burgess and C. Munoz (3)
The initial study entailed 170 restorations where SDR was bulk filled in increments of 4mm and then capped using Dentsply Sirona’s now discontinued composite material Esthet•X HD. Since the beginning of the trial the restorations have been individually evaluated at 12, 24 and 36 months. At each evaluation the parameters for assessment were fracture and surface defect, proximal contact, recurrent caries, sensitivity and gingival index. We are pleased to announce that the key findings of the clinical evaluation were as follows:
• There were no failures attributable to SDR.
• Acceptable performance with respect to safety and efficacy after 3 years.
• No post-operations have been reported related to SDR.
• No recurrent caries associated with SDR.
• No reports of adverse events.
• No adverse effects on the gingiva in contact with SDR.

“There were no observations of recurrent caries associated with the low stress resin and no reports of adverse events throughout the duration of the trial.”(3)

 

 

Conclusion
With more than 50 million applications since its introduction in 2009 and superior performance in clinical studies, it comes as no surprise that SDR Plus has become the bulk fill technology of choice for the creation of reliable direct restorations.

For more information or to request a demo, please contact your local Dentsply Sirona representative.

References
1. van Dijken JWV, Pallesen U, 2017: Bulk-filled posterior resin restorations based on stress-decreasing resin technology: a randomized, controlled 6-year evaluation.;Eur J Oral Sci. 2017 Aug;125(4):303-309.
2. van Dijken JWV, Pallesen U, 2016: Posterior bulk-filled resin composite restorations: A 5-year randomized controlled clinical study; J Dent 2016 Aug;51:29-35
3. Internal report #765-540 (2012-02-17); Data on file