Phosphoric acid etching for multi-mode universal adhesive

Article information

Restor Dent Endod. 2016;41(2):157-158

Publication date (electronic) : 2016 April 05

doi : https://doi.org/10.5395/rde.2016.41.2.157

Gangneung-Wonju National University, Korea.

Q

Multi-mode universal adhesives can be used in 'etch-and-rinse' or 'self-etch' modes. Is there any consideration for phosphoric-acid etching of enamel and/or dentin in the use of multi-mode universal adhesives?

A

Multi-mode universal adhesives (UA) are indicated as either self-etch or etch-and-rinse adhesives, and manufacturers also recommend an alternative 'selective enamel etch' technique. Currently available laboratory data support phosphoric acid selective etching of enamel prior to use of UA to improve bond strength.1 2 In another way to improve adhesion to enamel of UA without the use of phosphoric acid etching, increase of application time for 40 seconds rather than 20 seconds and active application (such as rubbing with microbrush) of UA in self-etch mode were suggested to increase the degree of conversion of the adhesive at the interface as well as the resin-enamel bond strength.3 4

When the dentin surface is pre-etched with phosphoric acid, it is thought that resin components of the self-etch adhesive have difficulty in penetrating the exposed collagen network, leading to a decrease in bond strength. Some experimental results showed equivalent dentin bonding quality of UA regardless of phosphoric acid etching,5 6 while in other studies additional phosphoric acid etching were beneficial for the dentin bond strength when using UA.7 8 In a recent randomized controlled clinical trial, the 36 month clinical behavior of Scotchbond Universal Adhesive (3M ESPE, St. Paul, MN, USA) did not depend on the bonding mode.9 However, this type of adhesive was only recently introduced to the market, and there is limited information on the influence of phosphoric acid etching. Therefore, more researches and investigations are needed.

Acknowledgement

Readers' forum is edited by Professor Kyung-Mo Cho (Gangneung-Wonju National University).

References

1. de Goes MF, Shinohara MS, Freitas MS. Performance of a new one-step multi-mode adhesive on etched vs non-etched enamel on bond strength and interfacial morphology. J Adhes Dent 2014;16:243–250. 24847489.

2. McLean DE, Meyers EJ, Guillory VL, Vandewalle KS. Enamel bond strength of new universal adhesive bonding agents. Oper Dent 2015;40:410–417. 25575201.

3. Cardenas AM, Siqueira F, Rocha J, Szesz AL, Anwar M, El-Askary F, Reis A, Loguercio A. Influence of conditioning time of universal adhesives on adhesive properties and enamel-etching pattern. Oper Dent 2016;1. 21. [Epub ahead of print].

4. Loguercio AD, Muñoz MA, Luque-Martinez I, Hass V, Reis A, Perdigão J. Does active application of universal adhesives to enamel in self-etch mode improve their performance? J Dent 2015;43:1060–1070. 25908573.

5. Takamizawa T, Barkmeier WW, Tsujimoto A, Berry TP, Watanabe H, Erickson RL, Latta MA, Miyazaki M. Influence of different etching modes on bond strength and fatigue strength to dentin using universal adhesive systems. Dent Mater 2016;32:e9–e21. 26719131.

6. Wagner A, Wendler M, Petschelt A, Belli R, Lohbauer U. Bonding performance of universal adhesives in different etching modes. J Dent 2014;42:800–807. 24814138.

7. Lee IS, Son SA, Hur B, Kwon YH, Park JK. The effect of additional etching and curing mechanism of composite resin on the dentin bond strength. J Adv Prosthodont 2013;5:479–484. 24353889.

8. Lenzi TL, Raggio DP, Soares FZ, Rocha Rde O. Bonding performance of a multimode adhesive to artificially-induced caries-affected primary dentin. J Adhes Dent 2015;17:125–131. 25901300.

9. Loguercio AD, de Paula EA, Hass V, Luque-Martinez I, Reis A, Perdigão J. A new universal simplified adhesive: 36-month randomized double-blind clinical trial. J Dent 2015;43:1083–1092. 26159382.

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