支柱螺丝的扭矩损失:支柱的类型和角度的影响
Sara Tavakolizadeh1, Navid Ahmadi2, Maryam Rezaeimajd3
1Department of Prosthodontics, School of Dentistry, Shahid Beheshti University of Medical Sciences, Tehran, Iran.f.
Journal of long-term effects of medical implants
|July 31, 2025
概括
与非原始和角度支柱相比,原始的直立支柱在循环负荷下显示出较少的螺丝松动和扭矩损失. 这表明原始的直立支柱可能在牙科植入物治疗中提供更好的长期性能.
科学领域:
- 生物材料和植入物学
- 机械工程在牙科中的应用
- 牙修复 牙修复 牙修复 牙修复 牙修复
背景情况:
- 支柱的螺丝松动是牙科植入物治疗中常见的机械并发症.
- 了解影响支柱螺丝稳定性的因素对于成功的临床结果至关重要.
研究的目的:
- 评估支柱类型 (原始与非原始) 和支柱角度 (直线与15°角) 对扭矩减小和螺丝松动的影响.
- 在循环负荷下比较不同支柱结构的机械稳定性.
主要方法:
- 三十个植入物有三个组 (n=10):原始直线,非原始直线和原始15°角的支柱.
- 支柱被扭矩到25N.cm,受到50万次负载周期 (100N在75Hz),并测量了反转扭矩值 (RTV).
- 统计分析包括ANOVA和使用SPSS版本21的独立t测试.
主要成果:
- 原始的直立支柱在循环负载后表现出最低的平均RTV (18.41±1.86N.cm),表明扭矩损失较小.
- 非原始的直立支柱 (13.18 ± 1.75 N.cm) 和原始的15°角度支柱 (14.76 ± 1.04 N.cm) 显示出明显更高的扭矩损失 (p < 0.001).
- 与非原始和角度支柱相比,原始的直立支柱表现出优越的机械稳定性.
结论:
- 原始的直立支柱似乎更耐螺丝松动和扭矩减少在循环负荷下.
- 支架类型和角度的选择显著影响牙科植入物的机械稳定性.
- 临床建议应考虑使用原始的直立支柱,以提高长期性能和降低并发症率.
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