目的 评估色号、上釉、底层材料厚度对A、D色系IPS e.maxLT底层材料相对透明率的影响。方法 制备160个厚度为0.3 mm和0.5 mm厚的IPS e.max LT盘状底层材料试样,按色号分为A1、A2、A3、A3.5、A4、D2、D3、D4组,每组5个。在其表面分别饰以与底层材料相同颜色的牙本质瓷,饰瓷厚度均为0.3 mm。最后在试样表面上釉,并置入铸瓷炉内烧结。在饰瓷后及上釉完成后,采用分光测色计对试样进行相对透明率的测定,统计学分析。结果 A色系试样的效应分析结果显示,厚度和上釉均对相对透明率有影响(P<0.001),且两者之间具有交互效应(P<0.001)。D色系试样的效应分析结果显示,厚度和上釉均对相对透明率有影响(P<0.001),但两者之间无交互效应(P=0.472)。色号对于A、D色系试样的相对透明率均无影响(P为0.153和0.525),色号与厚度、色号与上釉均无交互作用(P>0.05)。色号、厚度和上釉三种因素间无交互作用(P>0.05)。结论 厚度、上釉对A、D色系IPS e.max LT底层材料的相对透明率具有较大的影响,临床修复时应给予积极地关注。
Abstract
Objective To evaluate the effect of dentine porcelain and glaze on relative translucency of A, D color IPS e.max LT core material. Methods 160 disc-shaped base material IPS e.max LT samples with thickness of 0.3 mm and 0.5 mm were made, and divided to 8 groups by color number A1, A2, A3, A3.5, A4, D2, D3, D4, n=5. Same color dentin porcelain was decorated in surface, with thickness of 0.3 mm. Finally, all samples were glazed and sintered. Relative translucency was determined with spectral colorimeter after glazing and sintering, and statistically analyzed. Results Effect analysis Results of A color samples showed that both thickness and glaze were significant factors on relative translucency (P＜0.001), and there was interaction between them (P＜0.001). Effect analysis Results of D color samples showed that both thickness and glaze were significant factors on relative translucency (P＜0.001), and there was no interaction between them (P=0.472). Color series was not a relevant factor for relative translucency (P=0.153 and 0.525). There was no interaction between color series and thickness, between color series and glaze. There was no interaction among the three factors. Conclusions Decoration, glaze are important impact factors with a greater on relative translucency of A, D color IPS e.max LT core material, so that positive attention should be given in clinical practice.
关键词
色系 /
牙本质瓷 /
釉 /
相对透明率
Key words
color series /
dentine porcelain /
glaze /
relative translucency
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