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dc.contributor.authorAckland, D
dc.contributor.authorGriggs, I
dc.contributor.authorHislop, P
dc.contributor.authorWu, W
dc.contributor.authorPatel, M
dc.contributor.authorRichardson, M
dc.date.accessioned2020-12-21T02:25:23Z
dc.date.available2020-12-21T02:25:23Z
dc.date.issued2017-08-11
dc.identifierpii: 10.1186/s13018-017-0623-y
dc.identifier.citationAckland, D., Griggs, I., Hislop, P., Wu, W., Patel, M. & Richardson, M. (2017). An intramedullary Echidna pin for fixation of comminuted clavicle fractures: a biomechanical study. JOURNAL OF ORTHOPAEDIC SURGERY AND RESEARCH, 12 (1), https://doi.org/10.1186/s13018-017-0623-y.
dc.identifier.issn1749-799X
dc.identifier.urihttp://hdl.handle.net/11343/256920
dc.description.abstractBACKGROUND: Intramedullary fixation of comminuted mid-shaft clavicle fractures has traditionally been employed with satisfactory clinical outcomes; however, pins with smooth surfaces may protrude from the bone and are prone to migration, while some threaded pins are difficult to remove post-operatively. The aim of this proof-of-concept study was to develop and evaluate the biomechanical strength of a novel intramedullary Echidna pin device designed to maintain fracture reduction, resist migration and facilitate ease of post-operative removal. METHODS: Thirty human clavicle specimens were harvested and fractured in a comminuted mid-shaft butterfly configuration. Each specimen was randomly allocated to three surgical repair groups including intramedullary fixation using the Echidna pin and Herbert Cannulated Bone Screw System, as well as plate fixation using bi-cortical locking screws. Using a biomechanical testing apparatus, construct bending and torsional stiffness were measured, as well as ultimate bending strength. RESULTS: There was no significant difference in torsional stiffness and ultimate bending moment between the Echidna pin and Herbert screw repair constructs (p > 0.05); however, the Echidna pin construct demonstrated a significantly greater bending stiffness compared to that of the Herbert screw construct (mean difference 0.55 Nm/deg., p = 0.001). The plate construct demonstrated significantly greater torsional stiffness, bending stiffness and ultimate bending moment compared to those of the Herbert screw and Echidna pin (p < 0.05). CONCLUSIONS: An intramedullary Echidna pin device was designed to stabilize comminuted fractures of the clavicle, maintain fracture compression and provide ease of removal post-operatively. Since the results suggest equivalent or superior torsional and bending stability in the Echidna pin compared to that of the Herbert screw, the Echidna pin concept may represent an alternative fixation device to conventional intramedullary screws, nails and pins; however, superior plating using bi-cortical locking screws provides substantially higher construct structural rigidity than intramedullary devices, and may therefore be useful in cases of osteoporotic bone, or where high fracture stability is required.
dc.languageEnglish
dc.publisherBMC
dc.titleAn intramedullary Echidna pin for fixation of comminuted clavicle fractures: a biomechanical study
dc.typeJournal Article
dc.identifier.doi10.1186/s13018-017-0623-y
melbourne.affiliation.departmentAnatomy and Neuroscience
melbourne.affiliation.departmentBiomedical Engineering
melbourne.affiliation.departmentPhysiotherapy
melbourne.source.titleJournal of Orthopaedic Surgery and Research
melbourne.source.volume12
melbourne.source.issue1
dc.rights.licenseCC BY
melbourne.elementsid1233201
melbourne.contributor.authorAckland, David
melbourne.contributor.authorRichardson, Martin
melbourne.contributor.authorWu, Wen
melbourne.contributor.authorHislop, Patrick
melbourne.contributor.authorPatel, Minoo
dc.identifier.eissn1749-799X
melbourne.accessrightsOpen Access


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