在堵塞和增强热模拟过程中具有内部根吸收的牙的热行为:有限元素分析
Alper Kabakci1, Ayca Yilmaz2, Dilek Helvacioglu-Yigit3
1Department of Endodontics, Faculty of Dentistry, Istanbul University, Istanbul, Turkiye; Institute of Health Sciences, Istanbul University, Istanbul, Turkiye.
International dental journal
|September 17, 2025
概括
在根管填充过程中,特别是在大型的内部再吸收腔中,高温可以损害牙周带 (PDL). 临床医生必须考虑腔腔的大小,并使用减热技术来保护PDL.
科学领域:
- 牙周内科医院 牙周内科医院 牙周内科医院
- 生物材料科学 生物材料科学
- 牙科解剖学 牙科解剖学
背景情况:
- 内根再吸收 (IRR) 在内牙治疗中提出了挑战.
- 热塑性肠塞技术被广泛使用,但可能会带来热风险.
- 了解热量转移到牙周带 (PDL) 对患者安全至关重要.
研究的目的:
- 为了评估在模拟牙的热塑性堵塞过程中向PDL传递的热量,具有不同大小的内部根吸收 (IRR) 腔.
- 为了确定热传递在不同阻塞条件下是否超过PDL损伤的临界值.
主要方法:
- 创建了具有IRR腔 (3-4.5毫米直径) 的牙的三维有限元模型.
- 模拟包括血管化和非血管化PDL模型.
- 模拟了不同温度和角度的连续波压缩和回填技术.
主要成果:
- 在所有模型的下包阶段,PDL温度保持在47°C以下.
- 在填充过程中,PDL温度在200°C时超过了具有4mm和4.5mmIRR腔的模型中的关键水平.
- 血管化的PDL模型始终显示温度低于非血管化的模型.
结论:
- 在大型IRR腔中用200°C的gutta-percha填充可以显著增加PDL温度.
- 腔腔大小是堵塞过程中热风险评估的关键因素.
- 建议在治疗IRR病例时尽量减少堵塞过程中的热量产生,以防止PDL损伤.
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