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Soltanmohamadi borujeni E, Bavi A, Aghaali M, Saleh A, Mehdipour A. The effect of aging on shear bond strength of ceramic brackets to zirconia after surface treatment by sandblasting or Nd: YAG laser. jdm 2024; 37 : 10
URL: http://jdm.tums.ac.ir/article-1-6278-en.html
URL: http://jdm.tums.ac.ir/article-1-6278-en.html
1- Assisstant Professor, Department of Orthodontics, School of Dentistry, Tehran University of Medical Sciences, Tehran, Iran
2- Dentist, School of Dentistry, Tehran University of Medical Sciences, Tehran, Iran; Student Research Committee, Qom University of Medical Sciences, Qom, Iran
3- Assisstant Professor, Department of Community Medicine, Faculty of Medicine, Qom University of Medical Sciences, Qom, Iran
4- Dental Student, School of Dentistry, Tehran University of Medical Sciences, Tehran, Iran; Member of Research Center, Qom University of Medical Sciences, Qom, Iran
5- Associate Professor, Department of Pediatric Dentistry, Faculty of Dentistry, Qom University of Medical Sciences, Qom, Iran; Member of Research Center, Qom University of Medical Sciences, Qom, Iran
2- Dentist, School of Dentistry, Tehran University of Medical Sciences, Tehran, Iran; Student Research Committee, Qom University of Medical Sciences, Qom, Iran
3- Assisstant Professor, Department of Community Medicine, Faculty of Medicine, Qom University of Medical Sciences, Qom, Iran
4- Dental Student, School of Dentistry, Tehran University of Medical Sciences, Tehran, Iran; Member of Research Center, Qom University of Medical Sciences, Qom, Iran
5- Associate Professor, Department of Pediatric Dentistry, Faculty of Dentistry, Qom University of Medical Sciences, Qom, Iran; Member of Research Center, Qom University of Medical Sciences, Qom, Iran
Abstract: (284 Views)
Background and Aims: Strong bond between the ceramic brackets and ceramic veneers has an important role in cosmetic treatment. The purpose of this study was to investigate the effect of aging on the shear bond strength (SBS) of ceramic brackets bonded to zirconia after surface preparation by Neodymium-doped Yttrium Aluminum Garnet (Nd: YAG) laser or sandblasting with alumina.
Materials and Methods: This experimental study was conducted on 24 zirconia blocks and these blocks were randomly divided into two groups for surface preparation and each was sub-divided into three time intervals. Surface preparation was done by sandblasting with alumina: in SG1 (Immediately after sandblasting), SG2 (2 weeks after sandblasting), and SG3 (3 months after sandblasting) groups. For the Nd: YAG laser (1/5W, 20Hz, 10s) with non-contact mode: in LG4 (Immediately after laser), LG5 (2 weeks after laser), and LG6 (3 months after laser) groups. The ceramic brackets were bonded to the zirconia blocks. The SBS and adhesive remnant index (ARI) were evaluated and compared among test groups. Dara were analyzed using Mann Whitney test.
Results: There was no significant difference between the SBS of SG1 and LG4 (P=0.430), SG2 and LG5 (P=0.382) and SG3 and LG6 (P=0.326) groups. LG4 group showed the highest shear bond strength. After aging (2 weeks and 3 months), the laser groups showed higher SBS. There was no significant difference in the ARI between SG1 and LG4 (P=0.220), SG2 and LG5 (P=0.154), SG3 and LG6 (P=0.527) groups.
Conclusion: No significant difference was observed between the Nd: YAG laser and sandblasted groups in terms of SBS and ARI over time. Therefore, Nd: YAG laser could be used as a surface treamnet method in Zirconia crowns for bonding to ceramic brackets.
Materials and Methods: This experimental study was conducted on 24 zirconia blocks and these blocks were randomly divided into two groups for surface preparation and each was sub-divided into three time intervals. Surface preparation was done by sandblasting with alumina: in SG1 (Immediately after sandblasting), SG2 (2 weeks after sandblasting), and SG3 (3 months after sandblasting) groups. For the Nd: YAG laser (1/5W, 20Hz, 10s) with non-contact mode: in LG4 (Immediately after laser), LG5 (2 weeks after laser), and LG6 (3 months after laser) groups. The ceramic brackets were bonded to the zirconia blocks. The SBS and adhesive remnant index (ARI) were evaluated and compared among test groups. Dara were analyzed using Mann Whitney test.
Results: There was no significant difference between the SBS of SG1 and LG4 (P=0.430), SG2 and LG5 (P=0.382) and SG3 and LG6 (P=0.326) groups. LG4 group showed the highest shear bond strength. After aging (2 weeks and 3 months), the laser groups showed higher SBS. There was no significant difference in the ARI between SG1 and LG4 (P=0.220), SG2 and LG5 (P=0.154), SG3 and LG6 (P=0.527) groups.
Conclusion: No significant difference was observed between the Nd: YAG laser and sandblasted groups in terms of SBS and ARI over time. Therefore, Nd: YAG laser could be used as a surface treamnet method in Zirconia crowns for bonding to ceramic brackets.
Article number: 10
Type of Study: Research |
Subject:
Orthodontics
Received: 2024/03/7 | Accepted: 2024/06/2 | Published: 2024/03/29
Received: 2024/03/7 | Accepted: 2024/06/2 | Published: 2024/03/29
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