The threshold force required for femoral impaction grafting in revision hip surgery.

Hdl Handle:
http://hdl.handle.net/10147/108223
Title:
The threshold force required for femoral impaction grafting in revision hip surgery.
Authors:
Flannery, Olivia M; Britton, John R; O'Reilly, Peter; Mahony, Nicholas; Prendergast, Patrick J; Kenny, Paddy J
Affiliation:
Trinity Centre for Bioengineering, School of Engineering, Trinity College, Dublin, Ireland.
Citation:
The threshold force required for femoral impaction grafting in revision hip surgery. 2010, 81 (3):303-7 Acta Orthop
Journal:
Acta orthopaedica
Issue Date:
Jun-2010
URI:
http://hdl.handle.net/10147/108223
DOI:
10.3109/17453674.2010.480936
PubMed ID:
20367418
Abstract:
BACKGROUND AND PURPOSE: Femoral impaction grafting requires vigorous impaction to obtain adequate stability without risk of fracture, but the force of impaction has not been determined. We determined this threshold force in a preliminary study using animal femurs. METHODS: Adult sow femurs were used because of their morphological similarity to human femurs in revision hip arthroplasty. 35 sow femurs were impacted with morselized bone chips and an increasing force was applied until the femur fractured. This allowed a threshold force to be established. 5 other femurs were impacted to this force and an Exeter stem was cemented into the neomedullary canal. A 28-mm Exeter head was attached and loaded by direct contact with a hydraulic testing machine. Axial cyclic loading was performed and the position sensor of the hydraulic testing machine measured the prosthetic head subsidence. RESULTS: 29 tests were completed successfully. The threshold force was found to be 4 kN. There was no statistically significant correlation between the load at fracture and the cortex-to-canal ratio or the bone mineral density. Following impaction with a maximum force of 4 kN, the average axial subsidence was 0.28 mm. INTERPRETATION: We achieved a stable construct without fracture. Further studies using human cadaveric femurs should be done to determine the threshold force required for femoral impaction grafting in revision hip surgery.
Item Type:
Article
Language:
en
Keywords:
SURGERY
Local subject classification:
ORTHOPAEDICS
MeSH:
Adult; Animals; Arthroplasty, Replacement, Hip; Bone Cements; Bone Transplantation; Femoral Fractures; Hip Prosthesis; Humans; Prosthesis Failure; Reoperation; Swine
ISSN:
1745-3682

Full metadata record

DC FieldValue Language
dc.contributor.authorFlannery, Olivia Men
dc.contributor.authorBritton, John Ren
dc.contributor.authorO'Reilly, Peteren
dc.contributor.authorMahony, Nicholasen
dc.contributor.authorPrendergast, Patrick Jen
dc.contributor.authorKenny, Paddy Jen
dc.date.accessioned2010-07-23T14:42:00Z-
dc.date.available2010-07-23T14:42:00Z-
dc.date.issued2010-06-
dc.identifier.citationThe threshold force required for femoral impaction grafting in revision hip surgery. 2010, 81 (3):303-7 Acta Orthopen
dc.identifier.issn1745-3682-
dc.identifier.pmid20367418-
dc.identifier.doi10.3109/17453674.2010.480936-
dc.identifier.urihttp://hdl.handle.net/10147/108223-
dc.description.abstractBACKGROUND AND PURPOSE: Femoral impaction grafting requires vigorous impaction to obtain adequate stability without risk of fracture, but the force of impaction has not been determined. We determined this threshold force in a preliminary study using animal femurs. METHODS: Adult sow femurs were used because of their morphological similarity to human femurs in revision hip arthroplasty. 35 sow femurs were impacted with morselized bone chips and an increasing force was applied until the femur fractured. This allowed a threshold force to be established. 5 other femurs were impacted to this force and an Exeter stem was cemented into the neomedullary canal. A 28-mm Exeter head was attached and loaded by direct contact with a hydraulic testing machine. Axial cyclic loading was performed and the position sensor of the hydraulic testing machine measured the prosthetic head subsidence. RESULTS: 29 tests were completed successfully. The threshold force was found to be 4 kN. There was no statistically significant correlation between the load at fracture and the cortex-to-canal ratio or the bone mineral density. Following impaction with a maximum force of 4 kN, the average axial subsidence was 0.28 mm. INTERPRETATION: We achieved a stable construct without fracture. Further studies using human cadaveric femurs should be done to determine the threshold force required for femoral impaction grafting in revision hip surgery.-
dc.language.isoenen
dc.subjectSURGERYen
dc.subject.meshAdult-
dc.subject.meshAnimals-
dc.subject.meshArthroplasty, Replacement, Hip-
dc.subject.meshBone Cements-
dc.subject.meshBone Transplantation-
dc.subject.meshFemoral Fractures-
dc.subject.meshHip Prosthesis-
dc.subject.meshHumans-
dc.subject.meshProsthesis Failure-
dc.subject.meshReoperation-
dc.subject.meshSwine-
dc.subject.otherORTHOPAEDICSen
dc.titleThe threshold force required for femoral impaction grafting in revision hip surgery.en
dc.typeArticleen
dc.contributor.departmentTrinity Centre for Bioengineering, School of Engineering, Trinity College, Dublin, Ireland.en
dc.identifier.journalActa orthopaedicaen

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