Dental bonding agents have evolved from no-etch to total-etch (fourth- and fifth-generation) to sixth- and seventh-generation self-etch systems. With the acid, primer and bond (resin) combined in a single bottle, seventh-generation adhesive systems require only a single step, with no separate etching, rinsing or mixing. These agents come in light- and dual-cure formulations, and produce a bond strength of 20-30 MPa to enamel.
Adhesives for bonding composite resins to dentin and enamel are categorized as total-, self- or selective-etch, and usually contain resin monomers, curing initiators, inhibitors or stabilizers and solvents. They are formulated to withstand mechanical forces (especially shrinkage stress from the lining composite) and prevent leakage along the margins via adherence to enamel and dentin, and binding of the lining composite.
Etchants remove the post-preparation smear layer on teeth while opening dentinal tubules and demineralizing sufficient dentin to enable formation of resin tags within dentin structure. When combined with dentin adhesives, this process produces bond strengths adequate for placing/retaining restorations.
Total etching employs 30% to 40% phosphoric acid gel, producing high bond strengths without interfering with dual-cure resin product polymerization. Formulated with 10% maleic acid or acidic monomers, self-etching systems virtually eliminate the postoperative sensitivity seen with over-etching or over-drying of the dentin.
A recent issue of Dental Product Shopper featured cases by two dentists using Zest Dental Solutions products: treating a full arch with a LOCATOR F-Tx temporary prosthesis followed by a fixed F-Tx prosthesis; and providing a bulk-filled direct restorative composite restoration. A patient presented to Dr. Pär-Olov Östman with hopeless dentition...
Pre Op Dr. John Kanca reported a case where a bulimic patient of his had a level of damage to the lingual side of her anterior teeth that required restoration. Noting that, ideally, the best thing to do would be get her bulimia under control, and that he debated providing crowns, he decided to do direct restorations, feeling that the added cost...
An excellent bonding material is essential to a successful restoration, and the ideal bonding agent should be quick and easy to use, offer versatility for a variety of procedures, and provide excellent adhesion. Kuraray’s CLEARFIL Universal Bond Quick is a truly universal adhesive with unique rapid bond technology that meets all of these...
In the case of Bisco’s All-Bond Universal, “universal” means it can be used for virtually everything: direct restorations, indirect restorations, in conjunction with other materials, in any etch situation, and without needing any additional activators. This has to be the definition of truly universal. All-Bond Universal contains MDP monomer,...
…with Charles Christianson, Global Product Manager for KaVo Kerr’s OptiBond Universal OptiBond Universal launched in May and is an exciting new addition to the OptiBond family of products. We saw the need to create a secondary addition to our Universal Bonding Agent segment, and OptiBond Universal satisfied the need for a one-bottle bonding...
Futurabond U is a dual-cure adhesive that comes in a pretty cool two-chamber single-dose delivery system. VOCO America patented this delivery system, which eliminates any evaporation problems. The little two-chambered pack is activated by pressing on one end to squish the contents into another chamber, which mixes them. Then a single-use...
