Bond Strength of Resin Cement and Glass Ionomer to Nd:YAG Laser‐Treated Zirconia Ceramics
| Autor: | Nafiseh Asadzadeh, Hamidreza Rajati Haghi, Foojan Ghorbanian, Abdollah Rashid Javan, Farzaneh Ahrary, Reza Karamad, Amir Yari |
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| Rok vydání: | 2017 |
| Předmět: |
Ceramics
Materials science Surface Properties 0206 medical engineering Acrylic Resins Glass ionomer cement Lasers Solid-State 02 engineering and technology 03 medical and health sciences 0302 clinical medicine Materials Testing Dentin medicine Humans Cubic zirconia Ceramic Composite material General Dentistry Cement Bond strength Dental Bonding 030206 dentistry Silicon Dioxide 020601 biomedical engineering Resin Cements medicine.anatomical_structure visual_art Nd:YAG laser visual_art.visual_art_medium Zirconium Adhesive Shear Strength |
| Zdroj: | Journal of Prosthodontics. 28:e881-e885 |
| ISSN: | 1532-849X 1059-941X |
| Popis: | Purpose To investigate the effect of neodymium-doped yttrium aluminum garnet (Nd:YAG) laser irradiation on the surface properties and bond strength of zirconia ceramics. Materials and Methods Forty-eight zirconia ceramic pieces (4 × 4 × 1 mm3) were divided into four groups according to surface treatment as follows: two control groups (no treatment) for resin bonding (CRC) and glass ionomer (GI) bonding (CGC); two laser treatment groups (Nd:YAG irradiation, 3 W, 200 MJ, 10 Hz, 180 μs) for resin bonding (LRC) and GI bonding (LGC). The ceramics in the control groups and the laser groups were distinguished by the application of different cements (resin cement and GI). Following surface treatments, the specimens were cemented to human dentin with resin cement and GI. After bonding, the shear bond strength (SBS) of the ceramic to dentin was measured, and the failure mode of each specimen was analyzed using a stereomicroscope. A one-way ANOVA compared the average bond strength of the four groups. Pairwise comparisons among the groups were performed using the Games-Howell test. The level of significance was set at 0.05. Results The means (± standard deviation) of SBS values in the CRC, CGC, LRC, and LGC groups were 3.98 ± 1.10, 1.66 ± 0.59, 10.24 ± 2.46, and 2.21 ± 0.38 MPa, respectively. Data showed that the application of the Nd:YAG laser resulted in a significantly greater SBS of the resin cement to the zirconia ceramics (p < 0.001). The highest bond strength was recorded in the LRC group. In the CRC group, 75% of the failures were of the adhesive type, compared with 66.7% and 83.3% in the LRC and LGC groups, respectively. In the CGC group, all failures were adhesive. Conclusions Pretreatment of zirconia ceramic via Nd:YAG laser improves the bond strength of the resin cement to the zirconia ceramic. GI cement does not provide sufficient bond strength of zirconia ceramics to dentin. |
| Databáze: | OpenAIRE |
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