热力学动态负荷对金属和非金属望远镜下牙的保留的影响
The International journal of prosthodontics
|December 19, 2023
概括
热力学动态负荷维持了双冠保持下过度合器的保留,而石支柱/PEEK框架显示了增加的保留. 需要进一步的研究来进行临床建议.
科学领域:
- 生物材料科学是生物材料的科学.
- 牙假体 牙假体 牙假体 牙假体
- 机械工程 机械工程
背景情况:
- 部过度合对于恢复功能和审美至关重要.
- 评估不同材料组合在功能负载下的长期稳定性至关重要.
研究的目的:
- 为了评估热力学动态负荷对望远镜下骨过长牙的保留的影响.
- 为了比较不同金属和非金属材料组合的保留.
主要方法:
- 测试了四组超标:ZP (合金/PEEK),PP (PEEK/PEEK),TP (/PEEK) 和TG (/金/Co-Cr). 这四组超标被测试.
- 标本经历了10,000次移除/插入周期,然后在一个具有热循环 (5°C-55°C) 的模拟器中进行了1,200,000次加载周期.
- 使用通用测试机器,在加载前和后测量了保留力.
主要成果:
- 在ZP组中,平均保留力显著增加 (13.2N至16.4N).
- 在TP组中,平均保持力显著下降 (4.9N至3.3N).
- 对于PP和TG组,没有观察到保留力的显著变化.
结论:
- 对于双冠保留下部过度开口的金属和非金属组合,在热力学动态负荷后,证明了可接受的保留.
- 建议在例行临床应用之前进行进一步的实验室和临床检查.
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