Dentin bonding agents (DBAs) that don’t require a separate phosphoric etchant acid are called “self- etching primer” products. They bond to dentin and cut (i.e. prepared) enamel by etching the tooth with an acid that is already in the bonding agent. In other words, no separate phosphoric acid etching is necessary with them. Self-etching primer DBAs come as either two bottles (a self-etching primer, followed by a separate adhesive) or one (etchant, primer, and adhesive all-in-one). Examples of each type are given below
Two-Bottle Products:
Clearfil SE bond (Kuraray)
Clearfil Liner Bond 2V (Kuraray)
One-Bottle Products:
Prompt L-Pop (3M ESPE)
One-Up Bond F (Tokuyama/J. Morita)
Touch & Bond (Parkel)
Perhaps the most recent development in bonding has been the addition of self-etching primers to the fifth- generation bonding agents. Fifth-generation DBAs, also known as “one-bottle” or “one-component” DBAs, have been available since the mid-1990s and include such products as Single Bond (3M ESPE), OptiBond Solo Plus (SDS/Kerr), PQ1 (Ultradent), Excite (Ivoclar Vivadent). Their manufacturers don’t want to be left behind now that self-etching primers have become popular, so they have incorporated these into their product lines. Until very recently, the fifth-generation DBAs consisted of a single bottle or syringe that contained both the primer and the adhesive. The tooth structure needed to be treated with phosphoric acid before they were applied. Now, in response to the latest self-etching primer products, the manufacturers of some of the fifth- generation DBAs are selling them with self-etching primers that are used in place of the phosphoric acid. Why do this? Well, the manufacturers claim that using a self-etching primer reduces post-treatment sensitivity and shortens the clinical procedure. In addition, you no longer have to be concerned about how moist the tooth should be at the time of application. Two examples of fifth-generation DBAs now available with self-etching primers are One-Step Plus with Tyrian SPE from Bisco and OptiBond Solo Plus with Self- Etch Primer from SDS/Kerr. If you use One-Step Plus or OptiBond Solo Plus and want to reduce the possibility of post-treatment sensitivity, you may want to consider trying a self-ecthing primer with it. Please note, though, that not all fifth-generation DBAs come with self-etching primers; the only ones currently available are the SDS/Kerr and Bisco products.
Through the technology of self-etching adhesives it is now possible to avoid some of the problems that have been associated with the total-etch technique. Post operative sensitivity can be eliminated using the selfetch technique which is even significantly less technique-sensitive than total-etch.
One-Up Bond F changes colour giving the clinician a clear
indication of when the bonding agent A & B have mixed.
(Material turns from yellow to pink upon mixing, and the pink
colour will disappear upon light curing. The pink colour gives
an easy to read guide to full tooth coverage.
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