Hemmati Yasamin Babaee, Asli Hamid Neshandar, Nahavandi Alireza Mahmoudi, Safari Nika, Falahchai Mehran
Dental Sciences Research Center, Department of Orthodontics, School of Dentistry, Guilan University of Medical Sciences, Rasht, Iran.
Dental Sciences Research Center, Department of Prosthodontics, School of Dentistry, Guilan University of Medical Sciences, Rasht, Iran.
Korean J Orthod. 2023 Feb 10;53(3):139-149. doi: 10.4041/kjod22.144. Epub 2023 May 25.
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 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 (CO) 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 (ΔE), 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 ΔEt0t2 ( < 0.001). The APA group showed minimum (ΔE = 1.15 ± 0.53) and the control group showed maximum (ΔE = 0.19 ± 0.02) color stability, with no significant difference between the laser and CoJet groups ( = 0.511). The four groups were significantly different regarding ΔTPt0t2 ( < 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 ΔE and ΔTP did not exceed the acceptability threshold.
评估全立方稳定氧化锆（FSZ）在不同表面处理及咖啡热循环（CTC）后正畸粘结的颜色稳定性和半透明性。
本研究以120个FSZ圆盘形试件进行。选取30个试件作为对照组，保持完整。其余试件根据表面处理类型随机分为三组（n = 30）：空气颗粒研磨（APA）、二氧化硅涂层（CoJet）和二氧化碳（CO）激光处理。在试验组粘结金属托槽后，进行脱粘和抛光。随后，所有试件进行CTC（10000次循环）。在基线（t0）、脱粘和抛光后（t1）以及CTC后（t2）三次测量颜色参数、色差（ΔE）和半透明参数（TP）。对数据进行统计学分析（α = 0.05）。
各组间ΔEt0t2存在显著差异（< 0.001）。APA组颜色稳定性最低（ΔE = 1.15 ± 0.53），对照组最高（ΔE = 0.19 ± 0.02），激光组和CoJet组之间无显著差异（ = 0.511）。四组间ΔTPt0t2存在显著差异（< 0.001）。CoJet组（1.00 ± 0.18）和APA组（1.04 ± 0.38）的TP增加最大，而对照组增加最小（0.1 ± 0.02）。
正畸治疗会使氧化锆修复体易于变色和半透明性增加。尽管如此，记录的ΔE和ΔTP未超过可接受阈值。
