A device for improved reduction of tibial fractures treated with external fixation

• Published in: Proceedings of the Institution of Mechanical Engineers. Part H, Journal of engineering in medicine Journal of engineering in medicine, 2000-01, Vol.214 (5), p.449-457
• Main Authors: Moorcroft, C I, Thomas, P B M, Ogrodnik, P J, Verborg, S A
• Format: Article
• Language: English
• Subjects: Biological and medical sciences; Biomechanical Phenomena; Biomechanics; Bone; Cadaver; Degrees of freedom (mechanics); Equipment Design; External Fixators - standards; Fracture Fixation, Internal - instrumentation; Fracture Healing; Humans; Materials Testing; Medical sciences; Orthopedic surgery; Surgery; Surgery (general aspects). Transplantations, organ and tissue grafts. Graft diseases; Tibial Fractures - surgery; Time Factors; Traction - instrumentation; Treatment Outcome
• ISSN: 0954-4119; 2041-3033
• DOI: 10.1243/0954411001535471

Abstract A widely used method of treatment for unstable tibial shaft fractures is unilateral external fixation. The majority of fixators act as three distinct devices: an intra-operative reduction device, a device to maintain fracture alignment during healing and an aid to healing by allowing movement at the fracture site. Conventional operative techniques require the surgeon to manipulate a number of degrees of freedom at once, making reduction of the fracture difficult, and results in the fixator being out of alignment with the long axis of the bone. An operative method has been developed that separates reduction and fixation. A dedicated device has been designed to improve the per-operative control of fracture fragments during fracture reduction. The device has been used in clinical trials for the reduction of 22 diaphyseal tibial fractures. Compared with previous operative techniques there has been a saving of 53 per cent in fracture reduction time and an overall saving of 10 per cent in operating time. Fracture alignment has been improved compared with reductions achieved with a fixator which potentially improves healing and lowers the rate of malunion. In each case the fixator has been applied in alignment with the bone, improving dynamization and reducing the likelihood of malunion due to fixator cam slippage.