Zheng Li Wu, Wong Martin C M, Cheung Lim Kwong
The University of Hong Kong, Hong Kong SAR, China.
Surg Innov. 2011 Jun;18(2):156-9. doi: 10.1177/1553350610397216. Epub 2011 Feb 8.
For a given rate of distraction a greater frequency of distraction improves bone formation. However, the current distractors used in clinic are activated manually and produces intermittent advancement.
The authors developed an automatic driver that is capable of producing quasi-continuous distraction at a set of rates of 0.5, 1.0, 1.5, 2.0, 2.5, and 3.0 mm/d. Using a customized in vitro experimental system, the function and stability of the autodriven system were tested during loading.
The angular displacement of the automatic driver was quite regular while driving a constant torque of 4.268 × 10-(3) kg m. The driving achieved the target speed with the constant torque.
The automatic driven system provides a useful tool to assess the tissue healing at variable distraction rates with quasi-continuous traction. It demonstrates a potential for clinical application to shorten the treatment course of distraction osteogenesis.
对于给定的牵引速率，更高的牵引频率可改善骨形成。然而，目前临床上使用的牵引器是手动启动的，会产生间歇性推进。
作者开发了一种自动驱动器，能够以0.5、1.0、1.5、2.0、2.5和3.0毫米/天的一组速率产生准连续牵引。使用定制的体外实验系统，在加载过程中测试了自动驱动系统的功能和稳定性。
在驱动4.268×10⁻³千克米的恒定扭矩时，自动驱动器的角位移非常规律。在恒定扭矩下，驱动达到了目标速度。
自动驱动系统提供了一种有用的工具，可通过准连续牵引以可变牵引速率评估组织愈合情况。它显示出在临床应用中缩短牵引成骨治疗疗程的潜力。
