用两个后核心系统在不同的后空间直径中恢复的经过内牙治疗的牙的骨折抵抗 (体外研究)
Kholoud B Saad1, Samir I Bakry2, Rewaa G AboElhassan2
1Division of Fixed Prosthodontics, Department of Conservative Dentistry, Faculty of Dentistry, Alexandria University, Alexandria, Egypt. kholoudbll@gmail.com.
BMC oral health
|December 12, 2023
概括
这项研究发现,后间隙直径对恢复的内牙治疗牙的骨折抵抗有影响. 虽然直径较大的玻璃纤维柱子的阻力更高,但在两组之间没有发现统计学上显著的差异.
科学领域:
- 牙科材料科学 牙科材料科学
- 恢复性牙科 恢复性牙科
- 生物材料工程是生物材料的工程.
背景情况:
- 核心后修复的断裂阻力受到核心后设计,直径,长度,水泥类型和核心材料的影响.
- 现有的研究对后空间直径对断裂阻力的影响需要进一步扩展.
研究的目的:
- 为了评估经过内牙治疗的牙的骨折阻力,用两种不同的后核心系统在不同的后空间直径上恢复.
主要方法:
- 二十个部中央切口器根据后部材料 (玻璃纤维与石) 和直径 (1.3mm与1.75mm) 分为四组.
- 修复使用复合材料核心.
- 使用在静态负载下使用通用测试机器评估断裂阻力,并通过立体显微镜分析故障模式.
主要成果:
- 1.75mm直径 (GW) 的玻璃纤维柱体表现出最高的平均断裂阻力 (638.7 N).
- 定制的合金柱子直径为1.3mm (ZN) 显示了最低的平均断裂阻力 (435.3 N).
- 单向ANOVA显示,在测试组中,骨折耐力没有统计学上显著的差异.
结论:
- 后间隙直径影响内牙治疗牙的骨折抵抗.
- 后材料的弹性模量显著影响断裂阻力和故障模式.
- 尽管观察到差异,但在测试组之间没有发现骨折阻力在统计学上显著的差异.
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