Journal of Iranian Dental Association
J Iran Dent Assoc
Medical Sciences
http://jida.ir
23
journal23
2383-3041
10.52547/jida
en
jalali
1398
10
1
gregorian
2020
1
1
32
1
online
1
fulltext
en
Effect of Er:YAG Laser Irradiation on Shear Bond Strength of Two Porcelain Laminate Veneers Bonded to Tooth Surface
Prosthodontics
Prosthodontics
Original
Original
<div style="text-align: justify;"><strong>Background and Aim: </strong>The conventional procedure for removal of porcelain laminate veneers (PLVs) is time-consuming and inconvenient. The purpose of this study was to evaluate the efficacy of Er:YAG laser for debonding of PLVs.<br>
<strong>Materials and Methods: </strong>Forty-eight intact extracted human maxillary anterior teeth received discoid PLVs (24 feldspathic and 24 e-max ceramic). The PLVs had 0.7 mm thickness and 4 mm diameter. After cementation of all PLVs with a light-cure cement, samples were stored at 37ºC distilled water for 48 h. Samples of each ceramic were randomly divided into 3 groups of 8 samples. Then, laser was irra-diated on the cemented PLVs as follows: (I) feldspathic PLVs without laser irradiation (control group), (II) feldspathic PLVs with laser irradiation (6 s, 10 Hz, 200 mJ, 2 W), (III) feldspathic PLVs with laser irradiation (6 s, 10 Hz, 300 mJ, 3 W), (IV) e-max PLVs without laser irradiation (control group), (V) e-max PLVs with laser radiation (6 s, 10 Hz, 200 mJ, 2 W), (VI) e-max PLVs with laser irradiation (6 s, 10 Hz, 300 mJ, 3 W). The shear bond strength of all samples was measured using a universal testing machine. We used Mann-Whitney and Kruskal-Wallis tests for data analysis (P<0.05).<br>
<strong>Results: </strong>Laser irradiation decreased the shear bond strength of both ceramics. But this decrease was only significant for the e-max group (P<0.05). No significant difference was found between different laser irradiation powers in the two ceramic groups.<br>
<strong>Conclusion: </strong>Er: YAG laser is effective for debonding of e-max PLVs.</div>
Dental Porcelain, Dental Veneers, Lasers, Solid-State, Resin Cements
21
29
http://jida.ir/browse.php?a_code=A-10-1-952&slc_lang=en&sid=1
Ehsan
Morshedi
2300319475328460022793
2300319475328460022793
No
Postgraduate Student, Faculty of Dentistry, Shahed University, Tehran, Iran
Maryam
Azimi Zavaree
2300319475328460022794
2300319475328460022794
No
Assistant Professor, Department of Prosthodontics, Faculty of Dentistry, Shahed University, Tehran, Iran
Seyed Mohammad Reza
Hakimaneh
2300319475328460022795
2300319475328460022795
No
Assistant Professor, Department of Prosthodontics, Faculty of Dentistry, Shahed University, Tehran, Iran
Sayed Shojaedin
Shayegh
2300319475328460022796
2300319475328460022796
No
Associate Professor, Department of Prosthodontics, Faculty of Dentistry, Shahed University, Tehran, Iran
Maryam
Pirmoradian
2300319475328460022797
2300319475328460022797
No
PhD. Candidate, Department of Dental Biomaterials, School of Dentistry, Research Center for Science and Technology in Medicine, Tehran University of Medical Sciences, Tehran, Iran
Sara
Torabi
2300319475328460022798
2300319475328460022798
No
Periodontist, Tehran, Iran
Sina
Jafari
sina_jafari89@yahoo.com
2300319475328460022799
2300319475328460022799
Yes
Postgraduate Student, Faculty of Dentistry, Shahed University, Tehran, Iran