Araraquara Dental School, UNESP - Univ. Estadual Paulista, Araraquara, São Paulo, Brazil.
MSc student, Araraquara Dental School, UNESP - Univ. Estadual Paulista, Araraquara, São Paulo, Brazil.
J Prosthet Dent. 2022 Apr;127(4):659.e1-659.e11. doi: 10.1016/j.prosdent.2022.01.016. Epub 2022 Feb 17.
Studies on the behavior of computer-aided design and computer-aided manufacturing (CAD-CAM) monolithic materials subjected to gastric juice alternating with brushing-as occurs in patients with bulimia nervosa-are lacking.
The purpose of this in vitro study was to evaluate, over a simulated 5-year period, the effect of gastric juice alternating with brushing on the roughness, topography, and staining susceptibility of CAD-CAM monolithic materials.
Disks of Lava Ultimate (LU), Vita Enamic (VE), IPS Empress CAD (EMP), IPS e.max CAD (EMAX), and Vita Suprinity (VS) were randomly allocated to artificial saliva+brushing or gastric juice+brushing groups, simulating 1, 3, and 5 years of clinical function. The roughness (Sa) and topography were evaluated at baseline (T) and at each simulated year. For the staining susceptibility (ΔE), the CIELab color coordinates were registered at baseline, and, at the end of the fifth simulated year, the specimens were immersed in deionized water, coffee, or cola before the second reading. Roughness data were submitted to mixed repeated-measures ANOVA and Bonferroni, and the staining susceptibility data were analyzed by 3-way ANOVA and the Games-Howell test (α=.05).
The gastric juice+brushing led to higher roughness than artificial saliva+brushing only in the VE at T and T (P<.01). In both treatments, the LU and VE showed topography changes and an increase in roughness over time (P<.001), in addition to higher roughness than the other materials (P<.001). The staining susceptibility of the materials to each staining solution was not affected by the treatment (P>.05). The LU and VS groups were more stained by coffee (P<.001), while the VE and EMP groups were more stained by cola (P≤.016), except for the EMP in the gastric juice+brushing, where no significant difference was found between cola and coffee (P>.05). The EMAX was imperceptibly affected by the 3 solutions.
Concerning roughness and topography, the LU and VE were the most affected by both treatments. The staining susceptibility of the materials was not affected by the treatment.
缺乏关于计算机辅助设计和计算机辅助制造（CAD-CAM）整体材料在胃胃液交替与刷牙作用下（如神经性贪食症患者中发生的情况）行为的研究。
本体外研究的目的是在模拟的 5 年内评估胃液交替与刷牙对 CAD-CAM 整体材料的粗糙度、形貌和染色敏感性的影响。
将 Lava Ultimate（LU）、Vita Enamic（VE）、IPS Empress CAD（EMP）、IPS e.max CAD（EMAX）和 Vita Suprinity（VS）的圆盘随机分配到人工唾液+刷牙或胃液+刷牙组中，模拟 1、3 和 5 年的临床功能。在基线（T）和每个模拟年时评估粗糙度（Sa）和形貌。对于染色敏感性（ΔE），在基线时记录 CIELab 颜色坐标，在第五个模拟年后结束时，将标本浸入去离子水、咖啡或可乐中，然后进行第二次读数。对粗糙度数据进行混合重复测量方差分析和 Bonferroni 检验，对染色敏感性数据进行 3 因素方差分析和 Games-Howell 检验（α=.05）。
仅在 T 和 T 时，胃液+刷牙导致 VE 的粗糙度高于人工唾液+刷牙（P<.01）。在两种处理中，LU 和 VE 随着时间的推移显示出形貌变化和粗糙度增加（P<.001），并且比其他材料具有更高的粗糙度（P<.001）。材料对每种染色溶液的染色敏感性不受处理影响（P>.05）。LU 和 VS 组对咖啡的染色更明显（P<.001），而 VE 和 EMP 组对可乐的染色更明显（P≤.016），除了 EMP 在胃液+刷牙中，可乐和咖啡之间没有显著差异（P>.05）。EMAX 受到 3 种溶液的轻微影响。
就粗糙度和形貌而言，LU 和 VE 受到两种处理的影响最大。材料的染色敏感性不受处理影响。
