Faraj Adnan A, Naraen Asheem, Twigg Peter
Airedale General Hospital, Department of Orthopaedics, Skipton Road, Keighley, West Yorkshire BD20 6TD, and Medical Engineering Department, Biomechanical Laboratory, University of Bradford, United Kingdom.
Foot Ankle Int. 2007 Jan;28(1):89-91. doi: 10.3113/FAI.2007.0016.
Arthrodesis of the great toe metatarsophalangeal joint for osteoarthritis usually involves internal fixation. Ideally, the fixation method should be reproducible, leading to a high rate of fusion and minimal complications.
This biomechanical study compares circumferential wire and screw fixation methods of arthrodesis.
The two arthrodesis models have remarkably similar limits of elastic and plastic deformation. However, in the screw, failure by permanent deformation occurs at a load six times higher than the wire.
The use of circumferential wire fixation for osteoporotic bones in which screw purchase is poor is reasonable and for quality bone, screw fixation may be preferable.
拇趾跖趾关节骨关节炎的关节融合术通常需要内固定。理想情况下，固定方法应具有可重复性，能实现高融合率并使并发症最少。
本生物力学研究比较了关节融合术的环形钢丝和螺钉固定方法。
两种关节融合模型的弹性和塑性变形极限非常相似。然而，螺钉因永久变形而失效时的负荷比钢丝高六倍。
对于骨质较差的骨质疏松性骨，使用环形钢丝固定是合理的；而对于质量较好的骨，螺钉固定可能更可取。
