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Dimitriadis K, Spyropoulos K, Papadopoulos T. Metal-ceramic bond strength between a feldspathic porcelain and a Co-Cr alloy fabricated with Direct Metal Laser Sintering technique. J Adv Prosthodont. 2018;10(1):25-31doi: 10.4047/jap.2018.10.1.25.
Dimitriadis, K., Spyropoulos, K., & Papadopoulos, T. (2018). Metal-ceramic bond strength between a feldspathic porcelain and a Co-Cr alloy fabricated with Direct Metal Laser Sintering technique. The journal of advanced prosthodontics, 10(1), 25-31. https://doi.org/10.4047/jap.2018.10.1.25
Dimitriadis, Konstantinos, et al. "Metal-ceramic bond strength between a feldspathic porcelain and a Co-Cr alloy fabricated with Direct Metal Laser Sintering technique." The journal of advanced prosthodontics vol. 10,1 (2018): 25-31. doi: https://doi.org/10.4047/jap.2018.10.1.25
Dimitriadis K, Spyropoulos K, Papadopoulos T. Metal-ceramic bond strength between a feldspathic porcelain and a Co-Cr alloy fabricated with Direct Metal Laser Sintering technique. J Adv Prosthodont. 2018 Feb;10(1):25-31. doi: 10.4047/jap.2018.10.1.25. Epub 2018 Feb 12. PMID: 29503711; PMCID: PMC5829284.
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J Adv Prosthodont. 2018 Feb;10(1):25-31. doi: 10.4047/jap.2018.10.1.25. Epub 2018 Feb 12.

Metal-ceramic bond strength between a feldspathic porcelain and a Co-Cr alloy fabricated with Direct Metal Laser Sintering technique.

The journal of advanced prosthodontics

Konstantinos Dimitriadis, Konstantinos Spyropoulos, Triantafillos Papadopoulos

Affiliations

  1. Department of Biomaterials, Dental School, National and Kapodistrian University of Athens, Greece.
  2. Department of Dental Technology, Technological Institute of Athens, Greece.

PMID: 29503711 PMCID: PMC5829284 DOI: 10.4047/jap.2018.10.1.25

Abstract

PURPOSE: The aim of the present study was to record the metal-ceramic bond strength of a feldspathic dental porcelain and a Co-Cr alloy, using the Direct Metal Laser Sintering technique (DMLS) for the fabrication of metal substrates.

MATERIALS AND METHODS: Ten metal substrates were fabricated with powder of a dental Co-Cr alloy using DMLS technique (test group) in dimensions according to ISO 9693. Another ten substrates were fabricated with a casing dental Co-Cr alloy using classic casting technique (control group) for comparison. Another three substrates were fabricated using each technique to record the Modulus of Elasticity (

RESULTS: Substrates prepared using DMLS technique did not show internal porosity as compared to those produced using the casting technique. The E of control and test group was 222 ± 5.13 GPa and 227 ± 3 GPa, respectively. The bond strength was 51.87 ± 7.50 MPa for test group and 54.60 ± 6.20 MPa for control group. No statistically significant differences between the two groups were recorded. The mode of failure was mainly cohesive for all specimens.

CONCLUSION: Specimens produced by the DMLS technique cover the lowest acceptable metal-ceramic bond strength of 25 MPa specified in ISO 9693 and present satisfactory bond strength for clinical use.

Keywords: Co-Cr dental alloy; Direct Metal Laser Sintering (DMLS); Metal-ceramic bond strength; Three-point bending test

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