European Journal of Prosthodontics and Restorative Dentistry

Influence of Layer and Sintering Temperature on the Optical Properties of Multilayered Zirconia Materials


Objective: To evaluate the translucency and color difference of the individual layers of two multi-layered zirconia materials at different sintering temperatures and to compare them with lithium disilicate. Methods: Multi-layered zirconia systems with four distinct layers were selected for this study: DD cube ONE ML (4Y-TZP), DD cubeX2 ML (5Y-TZP); and compared with IPS e.max CAD HT (LS2). Plate-shaped A2-shade specimens were obtained from LS2 and individual layers of both zirconia materials. Individual layers were then divided equally into three different sintering temperatures:1300°C, 1450°C, and 1600°C. The TP and ΔE were determined by a spectrophotometer. SEM images were taken. Data was analyzed using SPSS 24.0 software with a p-value <0.05. Results: A
significant difference was found in TP and ΔE values amongst all types of ceramic materials. Different sintering temperatures yielded distinct TP and ΔE values when both zirconia materials were tested and compared with LS2. Finally, TP and ΔE values were different amongst the zirconia layers. Conclusion: Sintering temperature, type of ceramic material and different zirconia layers significantly affected the optical properties. Clinical Significance: Multi-layered zirconia materials possess a unique gradient effect that could efficiently enhance the esthetics of monolithic zirconia restorations. However, the sintering condition should be optimized.

Sintering Temperature
Lithium Disilicate
Color Differences


Bashayer A. Alfahed, Abdullah S. Alayad

Articles from this issue

Title / DOI Access Page Start Page End Purchase
Antimicrobial Activity in Chitosan-Treated Prosthetic Materials: A Systematic Review
no access 214 223 £10.00
Prevention of Caries in Cancer Patients: A Systematic Review on the Effectiveness of Dental Materials
no access 224 233 £
Mandibular Distalisation for Tooth Wear in Patients Requiring Mandibular Protrusion for Sleep Apnoea
no access 234 238 £10.00
Changes in Tooth Mobility and Position in an Established Dentition Following Placement of a New Restoration
no access 239 247 £10.00
Finishing and Polishing Procedures and Glaze Application on Physical Properties of a Fine-Structure Feldspathic Ceramic
no access 248 253 £10.00
The Effect of Ethanol Associated with Universal Adhesive on Resin Composite Adhesion to Different Dentin Depths: A Long-Term In Vitro Study
no access 254 261 £10.00
A Passive Noise Attenuation Earplug Designed to Minimise Unwanted Air Turbine Driven High-Speed Dental Drill Noise
no access 262 277 £10.00
Mechanical Characteristics of Composite Resins Produced by Additive and Subtractive Manufacturing
no access 278 285 £10.00
The Effect of Denture Adhesives on Denture Quality and Occlusal Force
no access 286 295 £10.00
An in vitro Comparison of Accuracy Between Three Different Face Scanning Modalities
no access 296 307 £10.00
Influence of Layer and Sintering Temperature on the Optical Properties of Multilayered Zirconia Materials
no access 308 320 £10.00
  • free access Free Access
  • no access No Access
  • full access Full Access