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Dental Materials Practical How To Supporting Your Practice

Improve Your Bonds Durability with BAC



This post was prepared in collaboration with Bisco

On an experimental basis, we have asked a limited number of companies to provide us with practical “How To” answers to clinical questions. We were prompted to conduct this experiment when dental team members told us that they visit company websites and consult company representatives for practical clinical information. We look forward to receiving your feedback on this experiment.

Etching the enamel and dentin surfaces is an important step in the placement of bonded restorations. However, evidence suggests that when etching the dentin surface, acid activates a group of proteolytic enzymes known as matrix metalloproteases (MMPs), which degrade collagen within the dentin organic matrix leading to premature failures.

Bisco’s Etch (Uni-Etch and Etch 37) contain an additive called benzalkonium chloride (BAC), which binds to dentin that has been demineralized by acid etch.  The BAC works to deactivate the MMP’s and stop them from degrading the hybrid layer1. Using an etch that contains BAC results in a more durable bond. In addition, BAC has a proven antimicrobial activity against Streptococcus mutans and Actinomyces viscous2.




  • Polymer-thickened phosphoric acid semi-gels enhance handling – stays where placed
  • No silica residue left behind after rinsing, which optimizes bond strength by up to 30%
  • Etch with benzalkonium chloride (BAC) has antimicrobial effects and inhibits MMP’s even after rinsing3


  1. Tezvergil-Mutluay A et al. The anti-MMP activity of benzalkonium chloride. J Dent. 2011 Jan;39(1):57-64.
  2. Sc.Dt. Emre ÖZEL, Dr. Haktan YURDAGÜVEN, Yrd.Doç.Dr. Esra CAN SAY, Prof.Dr. Sesin KOCAGÖZ, Evaluation of the Antibacterial Activity of Disinfectant Solutions with Phosphoric Acids Against Streptococcus Mutans. Journal of Hacettepe Faculty of Dentistry, Volume: 29, Issue 4, Page: 8-14, 2005
  3. TURKUN1, Z. ERGUCU, L.S. TURKUN, E.U. CELIK, and M. ATES, Is Phosphoric Acid Sufficiently Antibacterial? J Dent Res 85 (Spec Iss B):abstract number 1605, 2006 (www.dentalresearch.org).

For a FREE sample and more information please call 1-800-667-8811 or email info@biscocanada.com



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For more inromation, please contact Bisco Canada  1-800-667-8811 info@biscocanada.com or visit www.biscocanada.com

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