1. Initial construct stability of long cephalomedullary nails with superior locking for a complex trochanteric fracture model AO31A2.2- a biomechanical study.
- Author
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Schulz AP, Münch M, Barth T, Kowald B, Frese J, Behrends L, and Hartel M
- Subjects
- Humans, Biomechanical Phenomena, Bone Nails, Fracture Fixation, Intramedullary methods, Fracture Fixation, Intramedullary instrumentation, Hip Fractures surgery
- Abstract
Background: Complex fractures of the trochanteric region, as well as fractures located in the directly subtrochanteric region, are controversially discussed around the world regarding the nail type to be used. A long nail is recommended by manufacturers but requires longer surgical and fluoroscopy times. A possible solution could be a nail with an appropriate length which can be locked in a minimally invasive manner by the main aiming device. We aimed to determine if such a nail model (DCN SL nail, SWEMAC, Linköping, Sweden) offers similar structural stability on biomechanical testing on artificial bone as a standard long nail when used to treat complex trochanteric fractures and compared it to long nails usually used in this setting., Methods: An osteoporotic bone model was chosen. The Swemac Hansson DCN Nail System was used as osteosynthesis material. Two types of nails were chosen: a superior lock nail which can be implanted with a singular targeting device, and a long nail with distal locking using free-hand technique. AO31A2.2 fractures were simulated in a standardised manner. Axial height of the construct, varus collapse, and rotational deformity directly after nail insertion were simulated. A Universal Testing Machine was used. Measurements were made with a stereo-optic tracking system., Findings: There was a detectable difference in the axial fracture movement resulting in narrowing of the fracture gap. There was no difference in varus collapse or rotational deformity between the nail variants CONCLUSION: We conclude that there are small differences which are clinically insignificant and that a superior locking nail can safely be used to manage complex trochanteric fractures., (© 2024. The Author(s).)
- Published
- 2024
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