Journal article
A Novel Enamel and Dentin Etching Protocol Using α-hydroxy Glycolic Acid: Surface Property, Etching Pattern, and Bond Strength Studies
Operative dentistry, Vol.43(1), pp.101-110
2018
DOI: 10.2341/16-136-L
PMCID: PMC5985518
PMID: 29284105
Abstract
Objectives:
To determine the use of α-hydroxy glycolic acid (GA) as a surface pretreatment for dental restorative applications. The etching pattern of GA pretreatment of dental hard tissues was assessed by surface microhardness and scanning electron microscopy (SEM). The effectiveness of GA surface etching on the enamel and dentin resin bond strengths was assessed using two etchant application modes (rubbing and no rubbing) and three adhesive systems (Single Bond [SB], One Step Plus [OSP], and Scotchbond Universal [SBU]).
Methods:
Knoop microhardness measurements were carried out on polished enamel and dentin surfaces before and after treatment with 35% GA, 35% phosphoric acid (PA), or distilled water (control group) for 30 seconds. The microtensile bond strength test was carried out on enamel and dentin. Ultrastructural analysis of the surface and interfacial interaction was qualitatively accomplished using SEM.
Results:
Etching with either PA or GA significantly decreased the enamel microhardness, with GA being significantly less aggressive than PA (p<0.001), while both acids showed similar decreases in dentin microhardness (p=0.810). SEM revealed similar etching patterns of GA and PA, while apparently a thinner hybrid layer was observed for GA groups. In dentin, the bond strengths were statistically similar between PA and GA groups, regardless of the etchant application mode (p>0.05). However, rubbing of GA enhanced the bond strength to enamel. PA and GA significantly increased the SBU bond strength to enamel when compared to SB and OSP (p<0.05).
Conclusions:
GA effectively etched enamel and dentin surfaces, resulting in bond strength values similar to those associated with traditional PA. GA is a suitable enamel and dentin surface etchant for adhesive restorative procedures.
Details
- Title: Subtitle
- A Novel Enamel and Dentin Etching Protocol Using α-hydroxy Glycolic Acid: Surface Property, Etching Pattern, and Bond Strength Studies
- Creators
- Doglas Cecchin - Department of Restorative Dentistry, College of Dentistry, University of Illinois at Chicago, Chicago, IL, USA; and Department of Restorative Dentistry, College of Dentistry, University of Passo Fundo, Passo Fundo, RS, BrazilAna Paula Farina - Department of Restorative Dentistry, College of Dentistry, University of Illinois at Chicago, Chicago, IL, USA; and Department of Restorative Dentistry, College of Dentistry, University of Passo Fundo, Passo Fundo, RS, BrazilCristina MP Vidal - Department of Restorative Dentistry, College of Dentistry, University of Illinois at Chicago, Chicago, IL, USA; and Department of Operative Dentistry, College of Dentistry and Dental Clinics, University of Iowa, Iowa City, IA, USAAna K Bedran-Russo - Department of Restorative Dentistry, College of Dentistry, University of Illinois at Chicago, Chicago, IL, USA
- Resource Type
- Journal article
- Publication Details
- Operative dentistry, Vol.43(1), pp.101-110
- DOI
- 10.2341/16-136-L
- PMID
- 29284105
- PMCID
- PMC5985518
- NLM abbreviation
- Oper Dent
- ISSN
- 0361-7734
- eISSN
- 1559-2863
- Language
- English
- Date published
- 2018
- Academic Unit
- Operative Dentistry
- Record Identifier
- 9984066090702771
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