具有不同穿孔直径的内牙治疗牙的骨折阻力:一种体外分析
Flora Kakoura1, Kleoniki Lyroudia1, Nikolaos Economides1
1Department of Endodontology, School of Dentistry, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece.
Dentistry journal
|January 27, 2026
概括
阳性根穿孔显著降低了内牙治疗牙的骨折阻力 (FR). 较大的穿孔直径 (2.1mm和1mm) 与完整的牙相比,与FR显著减少有关.
科学领域:
- 牙周内科医院 牙周内科医院 牙周内科医院
- 牙科材料科学 牙科材料科学
- 生物机械工程 生物机械工程
背景情况:
- 阳性根穿孔是内牙治疗期间的手术并发症.
- 经过内牙治疗的牙的结构完整性和骨折阻力 (FR) 可能会因穿孔而受到损害.
研究的目的:
- 为了评估iatrogenic根穿孔的直径和内牙治疗牙的骨折阻力 (FR) 之间的相关性.
- 量化不同孔径大小对根强度的影响.
主要方法:
- 准备了65颗单根牙,并分为五组:完整的,仅使用仪器的,以及具有2.1毫米,1毫米或0.5毫米孔径的仪器.
- 穿孔在位置和角度上是标准化的 (105°到根表面).
- 使用通用测试机器进行骨折测试,将垂直压力负荷施加到骨折时;用ANOVA和Tukey测试分析数据.
主要成果:
- 平均断裂负荷为:第一组 (完好无损) 342.68 N,第二组 (仪器) 322.96 N,第三组 (2.1 毫米穿孔) 214.65 N,第四组 (1 毫米穿孔) 212.66 N,第五组 (0.5 毫米穿孔) 307.14 N.
- 与完整的牙相比,在2.1毫米和1毫米孔径的牙中观察到FR的统计显著减少 (p <0.05).
- 穿孔0.5毫米组没有显示出FR在统计学上显著下降.
结论:
- 创伤性根孔,特别是直径为2.1毫米和1毫米的根孔,显著损害了经过内牙治疗的牙的骨折抵抗力.
- 穿孔的大小是影响根的机械稳定性的关键因素.
- 在内牙科手术期间尽量减少穿孔大小,对于保持根强度至关重要.
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