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Shear bond strengths of pressed and layered veneering ceramics to high-noble alloy and zirconia cores.
J Prosthet Dent. 2011 Jul; 106(1):29-37.JP

Abstract

STATEMENT OF PROBLEM

Heat-pressed ceramics to metal alloys and zirconia have been available for some time. However, information regarding their shear bond strengths is limited.

PURPOSE

The purpose of this study was to evaluate the shear bond strengths of heat-pressed and layered ceramics with regard to their corresponding high-noble alloy and zirconia cores.

MATERIAL AND METHODS

Forty cylinders (approx. 5 mm in diameter) of high-noble alloy (Olympia) were cast and divided into 4 groups (n=10). Metal cylinders were veneered with ceramics to produce shear test specimens: Group PMI with IPS InLine POM; Group LMI with IPS InLine; Group PMC with Pulse press-to-metal; and Group LMC with Authentic Pulse Metal ceramic. Forty cylinders (approx. 5 mm in diameter) of zirconia (Lava) were obtained and divided into 4 groups (n=10). These cylinders were veneered with ceramics to produce shear test specimens: Group PZI with IPS e.max ZirPress; Group LZI with IPS e.max. Ceram; Group PZV with VITA PM9; and Group LZV with VITA VM9. The veneering ceramics, 3 mm in thickness, were either pressed or layered to their corresponding cylinders. Thermal cycling was performed at 5°C and 55°C for 20,000 cycles with a 20 second dwell time. Shear bond strength testing was conducted in a universal testing machine, and the failure strengths were recorded. Fracture surfaces were characterized visually, under a stereomicroscope, and with a scanning electron microscope (SEM). Data were analyzed using rank-based Kruskal-Wallis and Mann-Whitney tests with Bonferroni correction to adjust for multiple comparisons (α=.05).

RESULTS

For metal ceramic specimens, the mean (SD) shear bond strengths ranged from 37.8 (20.6) MPa to 66.4 (22.1) MPa. There were significant differences between Groups PMI and PMC and between Groups LMI and PMC, in which Groups PMI and LMI had significantly higher strength values than Group PMC (P=.041). For zirconia ceramic specimens, the mean (SD) shear bond strengths ranged from 30.03 (9.49) MPa to 47.2 (13.0) MPa, with Group LZV having a significantly higher shear bond strength value than Group LZI (P=.012). Half of the Group PZV specimens failed during thermal cycling, and Group PZV was, therefore, excluded from statistical analysis. For all shear bond strength testing specimens, cohesive failures in the veneering ceramics were observed.

CONCLUSIONS

For shear bond strength of veneering ceramics to high-noble alloy, there was no significant difference between pressing and layering with the same manufacturer. For shear bond strength of veneering ceramics to zirconia, there was no significant difference between the pressed and layered groups.

Authors+Show Affiliations

Graduate Prosthodontics, Department of Restorative Dentistry, School of Dentistry, University of Washington, Seattle, USA.No affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Comparative Study
Journal Article

Language

eng

PubMed ID

21723991

Citation

Ishibe, Motoaki, et al. "Shear Bond Strengths of Pressed and Layered Veneering Ceramics to High-noble Alloy and Zirconia Cores." The Journal of Prosthetic Dentistry, vol. 106, no. 1, 2011, pp. 29-37.
Ishibe M, Raigrodski AJ, Flinn BD, et al. Shear bond strengths of pressed and layered veneering ceramics to high-noble alloy and zirconia cores. J Prosthet Dent. 2011;106(1):29-37.
Ishibe, M., Raigrodski, A. J., Flinn, B. D., Chung, K. H., Spiekerman, C., & Winter, R. R. (2011). Shear bond strengths of pressed and layered veneering ceramics to high-noble alloy and zirconia cores. The Journal of Prosthetic Dentistry, 106(1), 29-37. https://doi.org/10.1016/S0022-3913(11)60090-5
Ishibe M, et al. Shear Bond Strengths of Pressed and Layered Veneering Ceramics to High-noble Alloy and Zirconia Cores. J Prosthet Dent. 2011;106(1):29-37. PubMed PMID: 21723991.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Shear bond strengths of pressed and layered veneering ceramics to high-noble alloy and zirconia cores. AU - Ishibe,Motoaki, AU - Raigrodski,Ariel J, AU - Flinn,Brian D, AU - Chung,Kwok-Hung, AU - Spiekerman,Charles, AU - Winter,Robert R, PY - 2011/7/5/entrez PY - 2011/7/5/pubmed PY - 2011/12/13/medline SP - 29 EP - 37 JF - The Journal of prosthetic dentistry JO - J Prosthet Dent VL - 106 IS - 1 N2 - STATEMENT OF PROBLEM: Heat-pressed ceramics to metal alloys and zirconia have been available for some time. However, information regarding their shear bond strengths is limited. PURPOSE: The purpose of this study was to evaluate the shear bond strengths of heat-pressed and layered ceramics with regard to their corresponding high-noble alloy and zirconia cores. MATERIAL AND METHODS: Forty cylinders (approx. 5 mm in diameter) of high-noble alloy (Olympia) were cast and divided into 4 groups (n=10). Metal cylinders were veneered with ceramics to produce shear test specimens: Group PMI with IPS InLine POM; Group LMI with IPS InLine; Group PMC with Pulse press-to-metal; and Group LMC with Authentic Pulse Metal ceramic. Forty cylinders (approx. 5 mm in diameter) of zirconia (Lava) were obtained and divided into 4 groups (n=10). These cylinders were veneered with ceramics to produce shear test specimens: Group PZI with IPS e.max ZirPress; Group LZI with IPS e.max. Ceram; Group PZV with VITA PM9; and Group LZV with VITA VM9. The veneering ceramics, 3 mm in thickness, were either pressed or layered to their corresponding cylinders. Thermal cycling was performed at 5°C and 55°C for 20,000 cycles with a 20 second dwell time. Shear bond strength testing was conducted in a universal testing machine, and the failure strengths were recorded. Fracture surfaces were characterized visually, under a stereomicroscope, and with a scanning electron microscope (SEM). Data were analyzed using rank-based Kruskal-Wallis and Mann-Whitney tests with Bonferroni correction to adjust for multiple comparisons (α=.05). RESULTS: For metal ceramic specimens, the mean (SD) shear bond strengths ranged from 37.8 (20.6) MPa to 66.4 (22.1) MPa. There were significant differences between Groups PMI and PMC and between Groups LMI and PMC, in which Groups PMI and LMI had significantly higher strength values than Group PMC (P=.041). For zirconia ceramic specimens, the mean (SD) shear bond strengths ranged from 30.03 (9.49) MPa to 47.2 (13.0) MPa, with Group LZV having a significantly higher shear bond strength value than Group LZI (P=.012). Half of the Group PZV specimens failed during thermal cycling, and Group PZV was, therefore, excluded from statistical analysis. For all shear bond strength testing specimens, cohesive failures in the veneering ceramics were observed. CONCLUSIONS: For shear bond strength of veneering ceramics to high-noble alloy, there was no significant difference between pressing and layering with the same manufacturer. For shear bond strength of veneering ceramics to zirconia, there was no significant difference between the pressed and layered groups. SN - 1097-6841 UR - https://www.unboundmedicine.com/medline/citation/21723991/Shear_bond_strengths_of_pressed_and_layered_veneering_ceramics_to_high_noble_alloy_and_zirconia_cores_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0022-3913(11)60090-5 DB - PRIME DP - Unbound Medicine ER -