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相关概念视频

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When a mechanic tries to remove a hex nut with a wrench, it is easier if the force is applied at the farthest end of the wrench handle. The lever arm is the distance from the pivot point (the hex nut in this case) to the person’s hand. If this distance is large, the torque is higher. Only the component of the force perpendicular to the lever arm contributes to the torque. Therefore, pushing the wrench perpendicular to the lever arm is more advantageous. If multiple people apply force to...
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In mechanical engineering, the interaction between a threaded screw shaft and a plate gear involves analyzing the resisting torque on the plate gear that can be overpowered when a specific torsional moment is applied to the shaft. To better comprehend this concept, consider a generic situation with a threaded screw shaft with a given mean radius and lead and a plate gear with a specified mean radius. The coefficient of static friction between the screw and gear is also provided.
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相关实验视频

Updated: Jul 14, 2025

An Improved Mechanical Testing Method to Assess Bone-implant Anchorage
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使用手动驱动器的植入物支架与扭矩关键相比.

Himani Singh1, Subhash Sonkesriya2, Bhumika J Patel3

  • 1Department of Oral Medicine and Radiology, Kothiwal Dental College and Research Centre, Moradabad, Uttar Pradesh, India.

Bioinformation
|October 10, 2023
PubMed
概括

手动螺丝刀具有较高的扭矩误差率,与扭矩钥匙不同. 机械扭矩限制仪器被推用于牙科植入程序中一致的扭矩应用,以避免变化并确保精度.

关键词:
牙植入物是如何使用的支柱螺丝螺丝 支柱螺丝手动驱动器手动驱动器内部线程是指内部线程.扭矩机关 扭矩机关

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科学领域:

  • 牙科植入物学 牙科植入物学
  • 生物材料工程 生物材料工程
  • 机械工程 机械工程

背景情况:

  • 手动螺丝刀具有显著的扭矩变化 (15-48%的误差).
  • 实现精确的扭矩对于牙植入物稳定性和寿命至关重要.
  • 机械扭矩限制装置提供一致的扭矩应用.

研究的目的:

  • 为了评估手持驱动器和扭矩钥匙之间的扭矩差异.
  • 评估这些扭矩差异对内部植入物线线的影响.

主要方法:

  • 准备了120块烯酸块与牙科植入物类似物.
  • 标本被分为手动扭矩和扭矩钥匙组 (60个).
  • 立体显微镜和Biowizard软件分析了内部线程架构和分离.

主要成果:

  • 手动扭矩应用显示平均扭矩为33.6 ± 6.510Ncm,操作员差异.
  • 扭矩钥匙的应用产生了33.57±3.472Ncm的平均扭矩.
  • 两种方法都没有对内部植入物线造成显著的修改或变形.

结论:

  • 手动扭矩应用导致不一致的扭矩值,这是由于操作员技能的变化.
  • 扭矩刀具在制造商指定的范围内提供准确的扭矩.
  • 建议使用机械扭矩限制仪器,以便在牙科植入程序中精确可靠地应用扭矩.