Wire tension versus wire frequency: An experimental Ilizarov frame study

Russa, Valentina La; Skallerud, Bjørn; Klaksvik, Jomar; Foss, Olav A.

doi:10.1016/j.jbiomech.2010.04.029

Cited by 7 publications

(13 citation statements)

References 24 publications

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“…As guiding bone growth is a delicate process and misalignments can become permanent, the tensioned wires need to have exact specified tensions. These wire tensions can be found by wire vibration frequencies when plucked [13]. It was also found that after a few cycles of dynamic loading, pre-tension of these wires settle to a steady state tension [14].…”

Section: String Length (L)mentioning

confidence: 89%

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The musical kinetic shape: A variable tension string instrument

Handžić

Reed

2014

Applied Acoustics

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In this article we present a novel variable tension string instrument which relies on a kinetic shape to actively alter the tension of a fixed length taut string. We derived a mathematical model that relates the two-dimensional kinetic shape equation to the string's physical and dynamic parameters. With this model we designed and constructed an automated instrument that is able to play frequencies within predicted and recognizable frequencies. This prototype instrument is also able to play programmed melodies.

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Section: String Length (L)mentioning

confidence: 89%

“…Taut string vibration frequency as a function of tension can also be of great interest outside musical practices such as in mechanical analysis of medical equipment [13]. The Ilizarov apparatus is an external fixation device that is used to lengthen, reshape, or align bones.…”

Section: String Length (L)mentioning

confidence: 99%

The musical kinetic shape: A variable tension string instrument

Handžić

Reed

2014

Applied Acoustics

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“…1). Wire tension was determined by an experimental equation that describes the association between wire vibration frequencies and wire tension in such experimental set-up (La Russa et al, 2010). Wire tension could thereby be sequentially measured while still being clamped at both ends by the tested fixator.…”

Section: Methodsmentioning

confidence: 99%

“…10-3101, Memphis, Tennessee, USA). A doughnut load cell (Futek, Model LTH350, Irvine, California) was serially coupled with the tensioner internal spring thereby permitting high accuracy of the wire tension measurements (La Russa et al, 2010). Two clinically relevant pretension levels were used, low at 883 N and high at 1275 N as employed in similar laboratory studies (Antoci et al, 2007;Bronson et al, 1998;Fleming et al, 1989;Kummer, 1989;Podolsky and Chao, 1993;Renard et al, 2005;Watson et al, 2003a).…”

Section: Methodsmentioning

confidence: 99%

“…The signal was then digitized by an oscilloscope and analyzed in a custom-made program where the background noise was filtered out and the dominant frequency was recorded. Finally the following empirical equation, whose employment is limited to the herein shown set-up, was used to calculate the wire tension (T) by means of the corresponding wire vibration frequency (f), (La Russa et al, 2010):…”

Section: Methodsmentioning

confidence: 99%

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Reduction in wire tension caused by dynamic loading. An experimental Ilizarov frame study

Russa

Skallerud

Klaksvik

et al. 2011

Journal of Biomechanics

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Towards a solution of the wires’ slippage problem of the Ilizarov external fixator

Bairaktari

Athanassiou

Panagiotopoulos

et al. 2014

Eur J Orthop Surg Traumatol

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Clinical experience has indicated that many complications during treatment with the Ilizarov method, and mainly tract infection, are related to decreased wire tension. The aim of this work was to evaluate biomechanically a novel wire tensioning and clamping system that will minimise or even diminish the reduction of the wire pretension during treatment. The proposed approach is based on threading of the wire end in a sufficient length. The wire pretension is applied by twisting a nut on the threaded part of the wires against the ring and is recorded by an incorporated force sensor. For biomechanical evaluation, the frame, consisting of a polyethylene bar, simulating the bone fragment, suspended on two rings, was subjected to a dynamic load of 0-800 N at a frequency of 0.5 Hz. After dynamic loading for 20 min, loss of the initial wire pretension for the novel clamping system ranged between 12 and 16%. The average loss for conventionally clamped wires was 75%. The advantages of the novel clamping system were the much greater ability to sustain the transverse load and the easy and effectual wire re-tensioning. Although wire slippage has been avoided with the novel system, wire material yield is still responsible for a pretension loss.

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Wire tension versus wire frequency: An experimental Ilizarov frame study

Cited by 7 publications

References 24 publications

The musical kinetic shape: A variable tension string instrument

The musical kinetic shape: A variable tension string instrument

Reduction in wire tension caused by dynamic loading. An experimental Ilizarov frame study

Towards a solution of the wires’ slippage problem of the Ilizarov external fixator

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