Effect of Veneering Technique on Color Matching of Translucent Ice Zirconia Substructure Veneered with Lithium Disilicate Using Pressable Technique Versus Conventional Layering Technique: An In-Vitro Study

Authors

  • Milad Eshah Department of Prosthodontics, Fixed Prosthodontics Division, Faculty of Dentistry and Oral Surgery, University of Tripoli, Libya
  • Mohamed Zeglam Department of Prosthodontics, Fixed Prosthodontics Division, Faculty of Dentistry and Oral Surgery, University of Tripoli, Libya
  • Noora Berhaim Department of Prosthodontics, Fixed Prosthodontics Division, Faculty of Dentistry and Oral Surgery, University of Tripoli, Libya
  • Nourelhouda Misurati Department of Prosthodontics, Fixed Prosthodontics Division, Faculty of Dentistry and Oral Surgery, University of Tripoli, Libya
  • Siham Omer Department of Conservative and Endodontic, Faculty of Dentistry and Oral Surgery, University of Sirte, Libya

Abstract

Aim. This study evaluated the effect of different veneering techniques on the color of translucent Ice zirconia substructure. Methods: A total of twenty translucent Ice Zirconia disc samples 12 mm in a diameter, 0.5 mm in thickness were designed and constructed using zirkonzahn system. The samples were classified into two groups: Group I: (n = 10) veneered by layering technique using IPS emax Ceram 1.0 mm thickness, dentin shade A2. Group II (n = 10) veneered by press-on technique using IPS emax press in-got 1.0 mm thickness, shade A2. Twenty composite resin discs 12mm in diameter and 5mm in thickness in A3 shade, were fabricated to be bonded to ceramic specimens using Dual-curing translucent rely X Unicem automix Self-Adhesive Resin luting cement. The color measurement was done using a spectrophotometer unit and ∆E was calculated. Color parameters were obtained using a spectrophotometer and were used to calculate color difference value with the preselected required color A2 tab according to Vita Classical shade guide (target shade). Color difference value (ΔE=3.7) was considered a clinically acceptable color match. Data were presented as means and standard deviation (SD) values. The independent t-test was used to compare between veneering techniques with 1mm veneer thickness. Results. The results showed that veneering techniques had a significant effect on mean (ΔE) values at P ≤ 0.001. The Press-on technique showed higher statistical significance difference (ΔE) Values (4.55±0.93) than layering technique (ΔE) Values (2.25±1.04) at p ≤ 0.001. Conclusions. The proper color matching of veneered zirconia is greatly affected by the veneering techniques. The layering technique is preferred regarding color matching.

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Published

2022-07-18