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Effect of orthodontic bonding with different surface treatments on color stability and translucency of full cubic stabilized zirconia after coffee thermocycling.

Authors
  • Hemmati, Yasamin Babaee1
  • Asli, Hamid Neshandar2
  • Nahavandi, Alireza Mahmoudi3
  • Safari, Nika4
  • Falahchai, Mehran2
  • 1 Dental Sciences Research Center, Department of Orthodontics, School of Dentistry, Guilan University of Medical Sciences, Rasht, Iran. , (Iran)
  • 2 Dental Sciences Research Center, Department of Prosthodontics, School of Dentistry, Guilan University of Medical Sciences, Rasht, Iran. , (Iran)
  • 3 Color Imaging and Color Image Processing Department, Institute for Color Science and Technology, Tehran, Iran. , (Iran)
  • 4 Dental Sciences Research Center, School of Dentistry, Guilan University of Medical Sciences, Rasht, Iran. , (Iran)
Type
Published Article
Journal
Korean journal of orthodontics
Publication Date
Feb 10, 2023
Volume
53
Issue
3
Pages
139–149
Identifiers
DOI: 10.4041/kjod22.144
PMID: 36760218
Source
Medline
Keywords
Language
English
License
Unknown

Abstract

To assess the color stability and translucency of full cubic stabilized zirconia (FSZ) following orthodontic bonding with different surface treatments and coffee thermocycling (CTC). This in vitro study was conducted on 120 disc-shaped specimens of FSZ. Thirty specimens were selected as the control group and remained intact. The remaining specimens were randomly divided into three groups based on the type of surface treatment (n = 30): airborne particle abrasion (APA), silica-coating (CoJet), and carbon dioxide (CO2) laser. After metal bracket bonding in the test groups, debonding and polishing were performed. Subsequently, all specimens underwent CTC (10,000 cycles). Color parameters, color difference (ΔE00), and translucency parameter (TP) were measured three times at baseline (t0), after debonding and polishing (t1), and after CTC (t2). Data were statistically analyzed (α = 0.05). Significant difference existed among the groups regarding ΔE00t0t2 (p < 0.001). The APA group showed minimum (ΔE00 = 1.15 ± 0.53) and the control group showed maximum (ΔE00 = 0.19 ± 0.02) color stability, with no significant difference between the laser and CoJet groups (p = 0.511). The four groups were significantly different regarding ΔTPt0t2 (p < 0.001). Maximal increases in TP were noted in the CoJet (1.00 ± 0.18) and APA (1.04 ± 0.38) groups while minimal increase was recorded in the control group (0.1 ± 0.02). Orthodontic treatment makes zirconia restorations susceptible to discoloration and increased translucency. Nonetheless, the recorded ΔE00 and ΔTP did not exceed the acceptability threshold.

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