The Journal of Advanced Prosthodontics

  • 제5권4호
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  • Pages.485-493
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  • 2013
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  • 2005-7806(pISSN)
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  • 2005-7814(eISSN)
대한치과보철학회 (The Korean Academy of Prosthodonitics)
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Bond strength of veneer ceramic and zirconia cores with different surface modifications after microwave sintering

  • Saka, Muhammet (Department of Prosthodontics, Faculty of Dentistry, Baskent University) ;
  • Yuzugullu, Bulem (Department of Prosthodontics, Faculty of Dentistry, Baskent University)
  • 투고 : 2013.09.25
  • 심사 : 2013.11.14
  • 발행 : 2013.11.30
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초록

PURPOSE. To evaluate the effects of surface treatments on shear bond strength (SBS) between microwave and conventionally sintered zirconia core/veneers. MATERIALS AND METHODS. 96 disc shaped Noritake Alliance zirconia specimens were fabricated using YenaDent CAM unit and were divided in 2 groups with respect to microwave or conventional methods (n=48/group). Surface roughness (Ra) evaluation was made with a profilometer on randomly selected microwave (n=10) and conventionally sintered (n=10) cores. Specimens were then assessed into 4 subgroups according to surface treatments applied (n=12/group). Groups for microwave (M) and conventionally (C) sintered core specimens were as follows; $M_C$,$C_C$: untreated (control group), $M_1,C_1:Al_2O_3$ sandblasting, $M_2,C_2$:liner, $M_3,C_3:Al_2O_3$ sandblasting followed by liner. Veneer ceramic was fired on zirconia cores and specimens were thermocycled (6000 cycles between $5^{\circ}-55^{\circ}C$). All specimens were subjected to SBS test using a universal testing machine at 0.5 mm/min, failure were evaluated under an optical microscope. Data were statistically analyzed using Shapiro Wilk, Levene, Post-hoc Tukey HSD and Student's t tests, Two-Way-Variance- Analysis and One-Way-Variance-Analysis (${\alpha}$=.05). RESULTS. Conventionally sintered specimens ($1.06{\pm}0.32{\mu}m$) showed rougher surfaces compared to microwave sintered ones ($0.76{\pm}0.32{\mu}m$)(P=.046), however, no correlation was found between SBS and surface roughness (r=-0.109, P=.658). The statistical comparison of the shear bond strengths of $C_3$ and $C_1$ group (P=.015); $C_C$ and $M_C$ group (P=.004) and $C_3$ and $M_3$ group presented statistically higher (P=.005) values. While adhesive failure was not seen in any of the groups, cohesive and combined patterns were seen in all groups. CONCLUSION. Based on the results of this in-vitro study, $Al_2O_{3-}$ sandblasting followed by liner application on conventionally sintered zirconia cores may be preferred to enhance bond strength.

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피인용 문헌

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  2. The effect of various sandblasting conditions on surface changes of dental zirconia and shear bond strength between zirconia core and indirect composite resin vol.7, pp.3, 2015, https://doi.org/10.4047/jap.2015.7.3.214
  3. Shear bond strength of veneering ceramic to coping materials with different pre-surface treatments vol.8, pp.5, 2016, https://doi.org/10.4047/jap.2016.8.5.339
  4. Veneered Zirconia-Based Restorations Fracture Resistance Analysis pp.1059941X, 2016, https://doi.org/10.1111/jopr.12490
  5. Pre-sintered Y-TZP sandblasting: effect on surface roughness, phase transformation, and Y-TZP/veneer bond strength vol.25, pp.6, 2017, https://doi.org/10.1590/1678-7757-2017-0131
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  7. Effect of veneering material and technique on the fracture resistance of porcelain-veneered zirconia crowns vol.7, pp.1, 2013, https://doi.org/10.4103/sjos.sjoralsci_69_18
  8. Glass coatings to enhance the interfacial bond strength between veneering ceramic and zirconia vol.108, pp.3, 2020, https://doi.org/10.1007/s10266-020-00497-w