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Title Effect Of Acid And Laser Etching On Shear Bond Strength Between Resin Composite And Resin Modified Glass Ionomer In The Sandwich Technique, an In Vitro Study
Clinical Question Does laser treatment or phosphoric acid etching produce a greater bond strength between resin composite and resin modified glass ionomer in the sandwich technique?
Clinical Bottom Line Laser etching the surface of resin modified glass ionomer (RMGI) greatly increased the shear bond strength and fracture pattern in the sandwich technique in an in vitro study.
Best Evidence (you may view more info by clicking on the PubMed ID link)
PubMed ID Author / Year Patient Group Study type
(level of evidence)
#1) 21234634Navimipour/201066 in vitro specimensLab study
Key resultsAn In vitro study clearly indicates a significant increase in bond strength between resin modified glass ionomer cement and resin composite when surface of RMGIC laser treated. (p<.05)
Evidence Search #143 Search ((#140) AND #141) AND #142 #142 Search glass ionomer cement #141 Search composite resin#140 Search laser etching
Comments on
The Evidence
The evidence is weak in regards to it being an in vitro study. There were no competing interests. Clinical studies need to be completed to strengthen the evidence.
Applicability When restoring class V lesions, the surface of RMGIC may be laser etched rather than phosphoric acid etched before bonding to resin composite in order to increase the fracture resistance of restoration.
Specialty/Discipline (General Dentistry) (Restorative Dentistry)
Keywords Resin-modified glass-ionomer, Composite resin, Sandwich technique, Surface treatment, Er,Cr:YSGG laser, Phosphoric acid
ID# 825
Date of submission: 03/24/2011spacer Revised: 10/19/2011
E-mail peckj@uthscsa.edu
Author Jason Peck
Co-author(s) e-mail
Faculty mentor/Co-author Mark Littlestar, DDS
Faculty mentor/Co-author e-mail littlestarm@uthscsa.edu
Basic Science Rationale
(Mechanisms that may account for and/or explain the clinical question, i.e. is the answer to the clinical question consistent with basic biological, physical and/or behavioral science principles, laws and research?)
post a rationale
None available
Comments and Evidence-Based Updates on the CAT
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by Zeki Abdulaali, Carson Lackey (San Antonio, TX) on 11/28/2017
A PubMed search conducted in November 2017 found a limited amount of evidence in general, and no more recent studies or higher-level evidence. As mentioned in the CAT, the existing evidence is very weak since it is an in vitro study. Clinical studies are needed to determine the effect of acid and laser etching on shear bond strength when comparing resin composite and resin modified glass ionomer using the sandwich technique.

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