dc.contributor.author | Gosiewski, JD | |
dc.contributor.author | Holsgrove, TP | |
dc.contributor.author | Gill, HS | |
dc.date.accessioned | 2017-05-11T13:14:59Z | |
dc.date.issued | 2017-05-04 | |
dc.description.abstract | OBJECTIVES: Fractures of the proximal femur are a common clinical problem, and a number of orthopaedic devices are available for the treatment of such fractures. The objective of this study was to assess the rotational stability, a common failure predictor, of three different rotational control design philosophies: a screw, a helical blade and a deployable crucifix. METHODS: Devices were compared in terms of the mechanical work (W) required to rotate the implant by 6° in a bone substitute material. The substitute material used was Sawbones polyurethane foam of three different densities (0.08 g/cm(3), 0.16 g/cm(3) and 0.24 g/cm(3)). Each torsion test comprised a steady ramp of 1°/minute up to an angular displacement of 10°. RESULTS: The deployable crucifix design (X-Bolt), was more torsionally stable, compared to both the dynamic hip screw (DHS, p = 0.008) and helical blade (DHS Blade, p= 0.008) designs in bone substitute material representative of osteoporotic bone (0.16 g/cm(3) polyurethane foam). In 0.08 g/cm(3) density substrate, the crucifix design (X-Bolt) had a higher resistance to torsion than the screw (DHS, p = 0.008). There were no significant differences (p = 0.101) between the implants in 0.24 g/cm(3) density bone substitute. CONCLUSIONS: Our findings indicate that the clinical standard proximal fracture fixator design, the screw (DHS), was the least effective at resisting torsional load, and a novel crucifix design (X-Bolt), was the most effective design in resisting torsional load in bone substitute material with density representative of osteoporotic bone. At other densities the torsional stability was also higher for the X-Bolt, although not consistently significant by statistical analysis.Cite this article: J. D. Gosiewski, T. P. Holsgrove, H. S. Gill. The efficacy of rotational control designs in promoting torsional stability of hip fracture fixation. Bone Joint Res 2017;6:270-276. DOI: 10.1302/2046-3758.65.BJR-2017-0287.R1. | en_GB |
dc.identifier.citation | Vol. 6 (5), pp. 270 - 276 | en_GB |
dc.identifier.doi | 10.1302/2046-3758.65.BJR-2017-0287.R1 | |
dc.identifier.uri | http://hdl.handle.net/10871/27476 | |
dc.language.iso | en | en_GB |
dc.publisher | British Editorial Society of Bone and Joint Surgery | en_GB |
dc.relation.url | https://www.ncbi.nlm.nih.gov/pubmed/28473334 | en_GB |
dc.rights | © 2017 Gosiewski et al. This is an open-access article distributed under the terms of the Creative Commons Attributions licence (CC-BY-NC), which permits unrestricted use, distribution, and reproduction in any medium, but not for commercial gain, provided the original author and source are credited. | en_GB |
dc.subject | DHS | en_GB |
dc.subject | Fracture | en_GB |
dc.subject | Hip | en_GB |
dc.title | The efficacy of rotational control designs in promoting torsional stability of hip fracture fixation | en_GB |
dc.type | Article | en_GB |
dc.date.available | 2017-05-11T13:14:59Z | |
exeter.place-of-publication | England | en_GB |
dc.description | This is the final version of the article. Available from the publisher via the DOI in this record. | en_GB |
dc.identifier.journal | Bone and Joint Research | en_GB |