Journal article
Biomechanical comparison of a locking compression plate combined with an intramedullary pin or a polyetheretherketone rod in a cadaveric canine tibia gap model
Veterinary Surgery, Vol.43(8), pp.1032-1038
2014
Abstract
Objective
To compare the biomechanical properties of a 10-hole 3.5 mm locking compression plate (LCP) with 2 proximal and 2 distal bicortical locked screws reinforced with either a Steinmann pin of 30–40% the medullary diameter or a poly-ether-ether-ketone (PEEK) rod of ∼75% the medullary diameter in a cadaveric tibia gap model.
Study Design
Ex vivo study.
Sample Population
Cadaveric canine tibias (n = 8 pair).
Methods
Each construct had a 10-hole 3.5 mm LCP with 2 screws per fracture fragment using a comminuted tibia gap model. The Steinmann pin constructs had a 2.4 mm intramedullary pin whereas the PEEK-rod constructs had a 6 mm intramedullary PEEK rod placed. Biomechanical testing included non-destructive bi-planar 4 point bending, torsion testing, and destructive axial compression. Testing produced the responses of failure load (N) in axial compression, stiffness (N/mm or N/°) in axial compression, torsion, lateral-medial, and caudal-cranial 4 point bending. Screw position within the PEEK-rods was determined after explantation.
Results
The PEEK-rod constructs were significantly stiffer in axial compression (P < .005), lateral-medial 4 point bending (P < .001), and in torsional loading (P < .031) than the Steinman pin constructs. There was no significant difference between the constructs for stiffness in caudal-cranial 4 point bending (P = .32). The PEEK-rod constructs failed at a significantly higher load than the Steinmann pin constructs (P < .001). All constructs failed by yielding through plastic deformation. Each screw penetrated the PEEK rod in all constructs but the position of the screw varied.
Conclusion
PEEK-rod constructs failed at significantly higher loads and were significantly stiffer in 4 point lateral-medial bending, axial compression, and torsion when compared with Steinmann pin constructs.
Details
- Title
- Biomechanical comparison of a locking compression plate combined with an intramedullary pin or a polyetheretherketone rod in a cadaveric canine tibia gap model
- Authors/Creators
- L.H. Beierer (Author/Creator)M. Glyde (Author/Creator)R.E. Day (Author/Creator)G.L. Hosgood (Author/Creator)
- Publication Details
- Veterinary Surgery, Vol.43(8), pp.1032-1038
- Publisher
- Wiley-Blackwell
- Identifiers
- 991005543890707891
- Copyright
- © 2014 The American College of Veterinary Surgeons
- Murdoch Affiliation
- School of Veterinary and Life Sciences
- Language
- English
- Resource Type
- Journal article
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- Collaboration types
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- Citation topics
- 1 Clinical & Life Sciences
- 1.34 Orthopedics
- 1.34.800 Fracture Management
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- Veterinary Sciences
- ESI research areas
- Plant & Animal Science