有机和无机纳米粒子对热硫化颌面硅树脂弹性体颜色稳定性和机械性能的影响:对比研究

IF 1 Q3 DENTISTRY, ORAL SURGERY & MEDICINE
eJournal of Oral Maxillofacial Research Pub Date : 2024-03-31 eCollection Date: 2024-01-01 DOI:10.5037/jomr.2024.15104
Manisha Khanna, Komal Sehgal, Shefali Singla, Virender Kumar
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引用次数: 0

摘要

研究目的这项体外比较研究的目的是评估有机和无机纳米粒子对颌面硅树脂弹性体在基线和室外风化 6 个月后的颜色稳定性、撕裂强度和硬度的影响:使用 M511 铂硅胶制作了 240 个试样,根据添加的纳米粒子类型(对照组、聚四氟乙烯 [PTFE]、二氧化钛 [TiO2]、氧化锌 [ZnO])将试样分为 4 组(n = 60),每组又分为 3 个子组(n = 20),分别进行颜色、撕裂强度(TS)和硬度(H)测试。测试在室外风化 6 个月前后进行,并获得数据:结果:PTFE 组风化后的颜色变化最小(∆E = 2.23)。二氧化钛组在风化前的 TS 值最大(12.01 牛顿/毫米),其次是聚四氟乙烯组(10.85 牛顿/毫米)。风化后,TiO2 组(12.9 N/mm)和 PTFE 组(12.54 N/mm)的 TS 值最大。二氧化钛组在风化前显示出最大硬度(24.15 邵氏硬度 A),聚四氟乙烯组在风化后显示出最大硬度(33.43 邵氏硬度 A):在本研究的局限性范围内,可以得出结论:在聚合物中添加聚四氟乙烯纳米粒子可以提高光学和机械性能,有利于延长假体的使用寿命。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Effect of Organic and Inorganic Nanoparticles on Colour Stability and Mechanical Properties of Heat Vulcanised Maxillofacial Silicone Elastomer: a Comparative Study.

Objectives: The purpose of this comparative study in vitro was to evaluate the effect of organic and inorganic nanoparticles on colour stability, tear strength and hardness of maxillofacial silicone elastomer at baseline and when subjected to outdoor weathering for 6 months.

Material and methods: A total of 240 specimens were fabricated using M511 platinum silicone which were divided into total 4 groups (n = 60) based on the type of nanoparticles (control, polytetrafuoroethylene [PTFE], titanium dioxide [TiO2], zinc oxide [ZnO]) added and each group was further divided into 3 subgroups (n = 20) for colour, tear strength (TS) and hardness (H) testing. The tests were conducted and data was obtained both before and after outdoor weathering of 6 months.

Results: Minimum colour change after weathering was observed in PTFE group (∆E = 2.23). TiO2 group showed maximum TS (12.01 N/mm) followed by PTFE group (10.85 N/mm) before weathering. After weathering, maximum TS was shown by TiO2 group (12.9 N/mm) and PTFE group (12.54 N/mm). TiO2 group showed maximum hardness (24.15 shore A) before weathering and PTFE group showed maximum hardness (33.43 shore A) after weathering.

Conclusions: Within the limitations of this study, it can be concluded that the addition of polytetrafuoroethylene nanoparticles to the polymer enhances both the optical as well as mechanical properties and can be considered favourable for the extended life of the prosthesis.

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