The effect of Er,Cr:YSGG laser irradiation on the push-out bond strength of RealSeal self-etch sealer.

Abstract

OBJECTIVE:

The aim of this study was to evaluate the effect of an erbium, chromium: yttrium-scandium-gallium-garnet (Er,Cr:YSGG) laser on the push-out bond strength of RealSeal Self-Etch (SE) sealer.

BACKGROUND DATA:

Various methods are used for smear layer removal in endodontics, such as the application of Er,Cr:YSGG lasers. This laser system may influence the bond strength of resin-based sealers.

METHODS:

Sixty single-rooted extracted teeth were selected. After root canal preparation, samples were divided into two experimental groups and one positive control group (n=20 per group). In group 1, the smear layer was removed by irrigation with ethylenediaminetetraacetic acid (EDTA) and sodium hypochlorite (NaOCl). In group 2, the smear layer was removed using a 2.78 μm Er,Cr:YSGG laser with radial firing tips (RFT3) (parameters: 1.5 W, 140 μs, 20 Hz, and 15% water to 15% air ratio), moving at 2 mm/sec in an apico-coronal direction. Group 3 served as a positive control group. Five specimens from each group were selected for scanning electron microscope (SEM) observation. The remaining 45 roots were obturated with RealSeal SE/Resilon and subjected to push-out tests. Data were analyzed using one way analysis of variance (ANOVA) and Tamhane's test.

RESULTS:

The results showed no significant difference between push-out bond strength of root canal fillings in the EDTA+NaOCl group and the 1.5 W laser group (p>0.05). The positive control group showed the lowest push-out bond strength.

CONCLUSIONS:

The results of the present study indicate that the application of an Er,Cr:YSGG laser with radial firing tips did not adversely affect the push-out bond strength of RealSeal SE sealer to dentin.

• Authors: Sara Ehsani, Behnam Bolhari, Ardavan Etemadi, Abdollah Ghorbanzadeh, Yazdan Sabet, Ali Nosrat
• Journal: Photomedicine and laser surgery (Photomed Laser Surg) Vol. 31 Issue 12 Pg. 578-85 (Dec 2013) ISSN: 1557-8550 [Electronic] United States
• PMID: 24206400 (Publication Type: Journal Article, Research Support, Non-U.S. Gov't)

Topics

• Dental Bonding
• Humans
• In Vitro Techniques
• Lasers, Solid-State
• Microscopy, Electrochemical, Scanning
• Tooth Root