背景:仍然缺乏热循环老化后每个时间点的不同氧化锆代的半透明性。
方法:使用四种氧化锆材料,总共60个样品由整体第三代(5Y)5mol%氧化钇稳定的氧化锆多晶陶瓷和第四代氧化锆(4Y)4mol%氧化钇稳定的氧化锆多晶陶瓷制成,由[group1:[CM-5Y]CeramillZolidfx(第三代氧化锆)(AmannGirrbach,Koblach,奥地利),组2:[CM-4Y]CeramillZolidHT+(第4代氧化锆)(AmannGirrbach,Koblach,奥地利),组3:[CC-5Y]CerconXT/ML(DentsplySirona,德国)(第三代),和第4组:[CC-4Y]CerconHT/ML(DentsplySirona,德国)(第4代)]。通过使用分光光度计在基线处和在10,000、30,000和50,000个热循环循环循环之后测量L*a*b*数字。在每个间隔,通过使用半透明公式CIEDE2000估计样品的半透明性。Scheffe事后比较了四种材料中每种材料的差异。重复测量ANOVA测试了在每个不同热循环间隔下材料之间的差异(p<.001)。数据分析的显著性水平为p<0.05(CI95%)。
结果:双因素方差分析显示,在基线时,第3代和第4代氧化锆在半透明性方面表现出统计学上的显着差异(P<.001)。基线和热循环后的半透明值表现出统计学上显著的变化(p=.003)。在每个时间间隔;CM-4Y具有最高的半透明值,其次是CM-5Y,CC-4Y和CC-5Y具有最小的半透明值。
结论:第三代和第四代氧化锆显示出不同的半透明性。热循环影响第三代和第四代氧化锆的半透明性。在每个时间间隔,第2组:[CM-4Y]的TP最高,其次是第1组:[CM-5Y],while,第3组:[CC-5Y]和第4组:[CC-4Y]的TP最少。
BACKGROUND: The translucency of different zirconia generations at each time point after thermocycling aging is still lacking.
METHODS: Four zirconia materials were used with a total of 60 samples produced from monolithic third generation (5Y) 5 mol% yttria-stabilized zirconia polycrystalline ceramic and fourth generation zirconia (4Y) 4 mol% yttria-stabilized zirconia polycrystalline ceramic, represented by [group1:[CM-5Y] Ceramill Zolid fx (3rd generation zirconia) (Amann Girrbach, Koblach, Austria), group 2:[CM-4Y] Ceramill Zolid HT + (4th generation zirconia) (Amann Girrbach, Koblach, Austria), group 3:[CC-5Y] Cercon XT/ML (Dentsply Sirona, Germany) (3rd generation), and group 4:[CC-4Y] Cercon HT/ML (Dentsply Sirona, Germany) (4th generation)]. The L*a*b* figures were measured by using a spectrophotometer at baseline and after 10,000, 30,000, and 50,000 cycles of thermocycling. At each interval, the translucency of the samples was estimated by using the translucency formula CIEDE2000. The Scheffe post-hoc compared differences among each of the four materials. The Repeated measures ANOVA tested the differences between the materials at each of the different thermocycling intervals (p < .001). Data analyses were evaluated at a significance level of p < .05 (CI 95%).
RESULTS: Two-way ANOVA revealed that at baseline the third and fourth generation\'s zirconia showed statistically significant differences in translucency (P < .001). Translucency values at baseline and after thermocycling exhibited statistically significant changes (p = .003). At each of the time interval; CM-4Y had the highest translucency values followed by CM-5Y, CC-4Y and CC-5Y had the least translucency values.
CONCLUSIONS: The third and fourth generations of zirconia displayed different translucencies. Thermocycling affected the translucency of both third and fourth generations of zirconia. At each of the time intervals group 2:[CM-4Y] had the highest TP followed by group1:[CM-5Y], while, group 3:[CC-5Y] and group 4:[CC-4Y] had the least TP.