Khadkekar Sai Akhil, Kareti Mahendranadh Reddy, Yelishetty Mahadev Shastry, Aditya S Venkata, Daripalli Srilekha
Department of Prosthodontics and Crown and Bridge, Sri Sai College of Dental Surgery, Vikarabad, Telangana, India.
J Indian Prosthodont Soc. 2025 Jan 1;25(1):80-85. doi: 10.4103/jips.jips_391_24. Epub 2025 Jan 3.
This study aims to enhance the scannability of Type III alpha gypsum by incorporating an opacifier and to evaluate its effect on the LSE property.
In vitro - Comparative study.
The base powder of Type III alpha gypsum was divided into three groups: Group I (100 g of base powder), Group II (90 g of base powder with 10 g of TiO2), and Group III (80 g of base powder with 20 g of TiO2). The study had two parts: First, scanning the mixtures to determine the best scannable material; second, testing for LSE using a plaster extensometer with 0.01 mm precision. Each group's scannability was assessed using a Medit lab scanner, and their LSE was measured.
One-way ANOVA with Tukey's post-hoc test for multiple comparisons.
Results showed that there was a statistical significance between the three groups. However, there was a decrease in the LSE with an increase in the concentration of the titanium dioxide (TiO2). Group III has shown superior scanning properties compared to the other groups.
Type III alpha gypsum reinforced with 20% TiO2 as an opacifier has exhibited superior scanning properties and there was a statistically significant decrease in the LSE between all three groups with increase in the concentrations of TiO2.
本研究旨在通过添加遮光剂来提高III型α-石膏的可扫描性，并评估其对线性收缩膨胀（LSE）性能的影响。
体外 - 对比研究。
III型α-石膏的基础粉末分为三组：第一组（100克基础粉末），第二组（90克基础粉末加10克二氧化钛），第三组（80克基础粉末加20克二氧化钛）。该研究分为两个部分：第一，扫描混合物以确定最佳可扫描材料；第二，使用精度为0.01毫米的石膏引伸计测试LSE。每组的可扫描性使用Medit实验室扫描仪进行评估，并测量其LSE。
采用单因素方差分析及Tukey事后检验进行多重比较。
结果表明三组之间存在统计学差异。然而，随着二氧化钛（TiO₂）浓度的增加，LSE有所降低。与其他组相比，第三组表现出更好的扫描性能。
用20%二氧化钛作为遮光剂增强的III型α-石膏表现出更好的扫描性能，并且随着二氧化钛浓度的增加，所有三组之间的LSE均有统计学意义的下降。
