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Related Experiment Video

Updated: Jul 4, 2026

Multi-material Ceramic-Based Components – Additive Manufacturing of Black-and-white Zirconia Components by Thermoplastic 3D-Printing (CerAM - T3DP)
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Ultra-High-Speed Sintering of 3.5Y-TZP Zirconia: Time Reduction Without Compromising Translucency.

Tatiana Roman1,2, Hamdi Jmal3, Teissir Ben Ammar4

  • 1Strasbourg University Hospitals, INSERM UMR_S 1121, CNRS EMR 7003, University of Strasbourg, Biomaterials and Bioengineering, CRBS, Strasbourg, France.

Journal of Esthetic and Restorative Dentistry : Official Publication of the American Academy of Esthetic Dentistry ... [Et Al.]
|July 3, 2026
PubMed
Summary

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This summary is machine-generated.

Restoration thickness is the main factor influencing 3.5Y-TZP zirconia translucency. Ultra-high-speed sintering (UHSS) significantly reduces processing time without compromising optical properties, making it a promising option for dental restorations.

Area of Science:

  • Dental Materials Science
  • Ceramic Engineering
  • Biomaterials

Background:

  • 3.5Y-TZP zirconia is widely used in dental restorations due to its mechanical properties.
  • Optimizing sintering protocols is crucial for balancing translucency and processing time.
  • Understanding the impact of sintering speed and thickness on optical properties is essential for clinical application.

Purpose of the Study:

  • To evaluate the effect of three sintering speeds (SLOW, FAST, UHSS) on the translucency and grain size of 3.5Y-TZP zirconia at various thicknesses.
  • To assess the influence of thermocycling on the translucency of sintered zirconia specimens.
  • To determine the clinical relevance of different sintering protocols for zirconia restorations.

Main Methods:

  • Disc specimens of 3.5Y-TZP zirconia were fabricated at thicknesses ranging from 0.7 to 2.0 mm.
Keywords:
3.5Y‐TZPdental ceramicsgrain sizespeed sinteringthermocyclingtranslucencyultra‐high‐speed sinteringzirconia

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  • Specimens were sintered using SLOW (7h), FAST (90 min), or UHSS (18 min) protocols.
  • Translucency was measured before and after thermocycling using a VITA Easyshade V; grain size was analyzed via SEM.

    • Main Results:

    • Specimen thickness was the predominant factor affecting translucency (partial η² = 0.97).
    • Sintering speed had a statistically significant but limited effect on translucency, with FAST showing higher translucency than UHSS.
    • Thermocycling had negligible effects on translucency, grain size, and crystalline composition. Faster sintering reduced grain size.
    • All sintering protocols maintained translucency within clinically acceptable thresholds (ΔTP₀₀ < 2.627).

    Conclusions:

    • Restoration thickness is the primary determinant of translucency in 3.5Y-TZP zirconia.
    • Ultra-high-speed sintering (UHSS) significantly reduces processing time without negatively impacting translucency or other critical properties.
    • UHSS protocols offer a viable and efficient option for fabricating translucent zirconia dental restorations.