背景:各种方法,化学和物理,消毒牙齿印模。常见的化学品包括1%的次氯酸钠和2%的戊二醛,而紫外线辐射是一种普遍的物理方法。很少有研究比较它们对聚醚印象中尺寸稳定性的影响。本研究旨在使用不同的消毒方法评估这种稳定性。因此,本研究拟采用不同消毒方法评价聚醚印模材料的尺寸稳定性。
方法:这项体外研究比较了化学消毒剂(1%次氯酸钠和2%戊二醛)和紫外线照射对聚醚印模材料尺寸稳定性的影响。A组,B,C,D,每个有十个样本(N=10),被研究过。A组未经处理(对照)。B组用2%戊二醛处理20分钟,C组用1%次氯酸钠处理20分钟,D组用紫外线照射20分钟。使用先导铣床钻制造四个标记为A的平行孔,B,C,和D在前磨牙区和前磨牙区从右到左。连续钻孔后,为了准确起见,使用测量员对4种植入物类似物进行定位.制作了10个开式聚醚印模,并按照组中所述进行了处理。然后浇注相应的铸模。使用能够在X轴和Y轴上记录的坐标测量机测量每种消毒方法的失真值。
结果:使用单向ANOVA检验对标记为A的不同组进行综合分析,B,C,D,揭示各组X1、X2、X4、X5和X6的平均距离存在显著差异,p值范围从0.001到0.000。然而,在X3中没有观察到显著差异。值得注意的是,Y变量的平均距离在各组之间表现出实质性差异,强调参数变化,p值范围从0.000到0.033。结果采用单因素方差分析检验比较四组,揭示了大多数X和Y变量的统计上显著的距离差异,除了X3和Y4。同样,事后Tukey的测试提供了特定的成对比较,强调C组与其他组之间在X轴和Y轴上各种变量的均值和偏差距离上的区别。
结论:本研究发现,用1%次氯酸钠或紫外线消毒20分钟可保持聚醚印模的尺寸稳定性。
BACKGROUND: Various methods, chemical and physical, disinfect dental impressions. Common chemicals include 1% Sodium Hypochlorite and 2% glutaraldehyde, while UV radiation is a prevalent physical method. Few studies compare their effects on dimensional stability in polyether impressions. This
study aims to assess such stability using different disinfection methods. Therefore, this
study was planned to evaluate the dimensional stability of polyether impression material using different disinfection methods.
METHODS: This in vitro
study compared the effects of chemical disinfectants (1% Sodium Hypochlorite and 2% glutaraldehyde) and UV irradiation on the dimensional stability of polyether impression material. Groups A, B, C, and D, each with ten samples (N = 10), were studied. Group A was untreated (control). Group B was treated with 2% glutaraldehyde for 20 min, Group C with 1% Sodium Hypochlorite for 20 min, and Group D with UV rays for 20 min. A pilot milling machine drill was used to make four parallel holes labeled A, B, C, and D in the anterior and premolar regions from right to left. After sequential drilling, four implant analogs were positioned using a surveyor for accuracy. Ten open-tray polyether impressions were made and treated as described in the groups, followed by pouring the corresponding casts. Distortion values for each disinfection method were measured using a coordinate measuring machine capable of recording on the X- and Y-axes.
RESULTS: A comprehensive analysis was conducted using the one-way ANOVA test for distinct groups labeled A, B, C, and D, revealing significant differences in the mean distances for X1, X2, X4, X5, and X6 among the groups, with p-values ranging from 0.001 to 0.000. However, no significant differences were observed in X3. Notably, mean distances for the Y variables exhibited substantial differences among the groups, emphasizing parameter variations, with p-values ranging from 0.000 to 0.033. The results compared the four groups using the one-way ANOVA test, revealing statistically significant distance differences for most X and Y variables, except for X3 and Y4. Similarly, post-hoc Tukey\'s tests provided specific pairwise comparisons, underlining the distinctions between group C and the others in the mean and deviation distances for various variables on both the X- and Y-axes.
CONCLUSIONS: This
study found that disinfection with 1% sodium hypochlorite or UV rays for 20 min maintained dimensional stability in polyether impressions.