Faculty Collaboration Database

Bonding with self-etching primers--pumice or pre-etch? An in vitro study. Eur J Orthod 2012 Apr;34(2):257-61

Date

02/09/2011

Pubmed ID

21300729

DOI

10.1093/ejo/cjq197

Scopus ID

2-s2.0-84859299821 (requires institutional sign-in at Scopus site)   11 Citations

Abstract

The purpose of this study was to compare the shear bond strengths (SBSs) of orthodontic brackets bonded with self-etching primer (SEP) using different enamel surface preparations. A two-by-two factorial study design was used. Sixty human premolars were harvested, cleaned, and randomly assigned to four groups (n = 15 per group). Teeth were bathed in saliva for 48 hours to form a pellicle. Treatments were assigned as follows: group 1 was pumiced for 10 seconds and pre-etched for 5 seconds with 37 per cent phosphoric acid before bonding with SEP (Transbond Plus). Group 2 was pumiced for 10 seconds before bonding. Group 3 was pre-etched for 5 seconds before bonding. Group 4 had no mechanical or chemical preparation before bonding. All teeth were stored in distilled water for 24 hours at 37°C before debonding. The SBS values and adhesive remnant index (ARI) score were recorded. The SBS values (± 1 SD) for groups 1-4 were 22.9 ± 6.6, 16.1 ± 7.3, 36.2 ± 8.2, and 13.1 ± 10.1 MPa, respectively. Two-way analysis of variance and subsequent contrasts showed statistically significant differences among treatment groups. ARI scores indicated the majority of adhesive remained on the bracket for all four groups. Pre-etching the bonding surface for 5 seconds with 37 per cent phosphoric acid, instead of pumicing, when using SEPs to bond orthodontic brackets, resulted in greater SBSs.

Author List

Fitzgerald I, Bradley GT, Bosio JA, Hefti AF, Berzins DW

Authors

David Berzins BS,PhD Graduate Program Director for Dental Biomaterials in the General Dental Sciences/Dental Biomaterials department at Marquette University
Arthur Hefti DDS,PhD Associate Dean - Research & Graduate Studies in the Dentistry department at Marquette University

MESH terms used to index this publication - Major topics in bold

Acid Etching, Dental
Adhesiveness
Dental Alloys
Dental Bonding
Dental Enamel
Dental Pellicle
Dental Prophylaxis
Dental Stress Analysis
Elastic Modulus
Humans
Light-Curing of Dental Adhesives
Materials Testing
Orthodontic Appliance Design
Orthodontic Brackets
Phosphoric Acids
Resin Cements
Shear Strength
Silicates
Stainless Steel
Stress, Mechanical
Surface Properties
Temperature
Time Factors
Water