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Shear bond strength of ceramic brackets bonded to three different porcelain surfaces
Fundagul Bilgic1, Huseyin Alkis2, Ahmet Yalcin Gungor3, Ali Riza Tuncdemir4, Meral Aslan Malkoc5
1 Department of Orthodontics, Mustafa Kemal University, Dentistry Faculty, Hatay, Turkey
2 Department of Orthodontics, Private Orthodontist, Isparta, Turkey
3 Departments of Orthodontics, Orthodontist, Akdeniz University, Dentistry Faculty, Antalya, Turkey
4 Departments of Prosthodontics, Mustafa Kemal University, Dentistry Faculty, Hatay, Turkey
5 Departmens of Prosthodontics, Inonu University, Dentistry Faculty, Malatya, Turkey
Correspondence Address:
Fundagul Bilgic
Departments of Orthodontics, Mustafa Kemal University, Dentistry Faculty, Hatay
Turkey
 Source of Support: None, Conflict of Interest: None  | Check |
DOI: 10.4103/2347-4610.116592
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Introduction: The aim of this study is to determine the shear bond strength (SBS) of ceramic brackets bonded to three different porcelain surfaces. Materials and Methods: A total of 36 porcelain crowns were used in this study. Porcelain crowns were allocated to the three groups as follows: Conventional porcelain-fused-to-metal crowns, IPS e.max ceramic crowns, and porcelain-fused-to-zirconia crowns. Porcelain surfaces were etched with 9.6% hydrofluoric acid and rinsed with a water/spray combination. Then, ceramic brackets were bonded with a light-cured composite resin. All the specimens were stored in distilled water at 37°C for 24 hours and thermocycled and loaded into a universal testing machine for testing. Any adhesive that remained after debonding was assessed and scored according to the modified adhesive remnant index (ARI). Statistical Analysis: One-way analysis of variance (ANOVA) and Tukey's test were used to compare the SBS of the groups. The Chi-square test was used to determine the ARI scores among the groups. Results: No statistically significant difference between the ARI scores for the three types of crowns was observed. In the conventional porcelain-fused-to-metal crown group (7.09 MPa), the lowest values of bond strength were obtained. Although similar values of bond strength were found in the IPS e.max ceramic crown (8.60 MPa) and porcelain-fused-to-zirconia crown (8.93 MPa) groups, the statistically significant differences in values of shear bond strength have observed between the other groups. Conclusions: SBS of ceramic brackets bonded to different porcelain surfaces may produce different results due to the type of porcelain crown.
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