An in vitro evaluation of plate luting using osteotomized equine third metacarpal bones with a limited contact-dynamic compression plate.
Abstract: To evaluate the effects of plate luting on the biomechanical properties of a broad limited contact-dynamic compression plate (LC-DCP) fixation to repair osteotomized equine 3rd metacarpal (MC3) bones. Methods: In vitro biomechanical testing of paired cadaveric equine MC3 with a mid-diaphyseal osteotomy, stabilized by LC-DCP fixation, with 1 of the pair luted with polymethylmethacrylate (PMMA). Methods: Ten pairs of adult equine cadaveric MC3 bones. Methods: Ten pairs of equine MC3 were divided into 2 test groups (5 pairs each) for (1) palmarodorsal 4-point bending single cycle to failure testing and (2) palmarodorsal 4-point bending cyclic fatigue testing. The LC-DCP (8 hole, 4.5 mm) was applied to the dorsal surface of each pair of MC3 bones. All plates and screws were applied using standard AO/ASIF techniques. All MC3 bones had mid-diaphyseal osteotomies. One of the matched pairs of LC-DCP-MC3 constructs were randomly chosen to be luted with PMMA. Mean test variable values for each method were compared using a paired t-test within each group; significance was set at P.05) than those of the LC-DCP fixation without luting. Mean cycles to failure for palmarodorsal 4-point bending was significantly (P<.0003) greater, with a 7.2-fold increase, for the LC-DCP fixation with luting compared with the LC-DCP fixation without luting. Conclusions: Luting the broad LC-DCP with PMMA in the fixation osteotomized equine MC3 bones increases the fatigue life of cyclic loading for palmarodorsal 4-point bending under the in vitro conditions studied. Conclusions: The cyclic fatigue data supports the conclusion that luted broad LC-DCP fixation is biomechanically superior to the non-luted broad LC-DCP fixation in osteotomized equine MC3 bones.
Publication Date: 2005-12-14 PubMed ID: 16343146DOI: 10.1111/j.1532-950X.2005.00091.xGoogle Scholar: Lookup
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- Comparative Study
- Journal Article
Summary
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The research assesses the impact of plate luting on the biomechanical properties of a specific type of bone fixation using horse bones. The findings suggest that using a filler material, polymethylmethacrylate (PMMA), can enhance the durability of the fixation under repetitive load conditions.
Methodology
- Researchers carried out an in vitro biomechanical test on pairs of cadaveric horse bones (equine third metacarpal or MC3) that had undergone osteotomy – a surgical procedure to cut and reshape the bone.
- Each pair was divided into two test groups for two different types of tests – one testing the bending point until the bone breaks, and the other observing the bending resistance under repetitive load conditions.
- The Limited Contact-Dynamic Compression Plate (LC-DCP), a commonly used bone fixation device, was affixed onto the bone surface using standard AO/ASIF methods. This plate essentially holds the bone pieces together after osteotomy.
- For comparison, one of the bones in each pair had the LC-DCP luted, or filled, with PMMA – a type of synthetic resin. This was compared with the same fixation without additional luting.
Results
- Results revealed no significant difference in the initial bending point until breakage between bones with and without luting.
- However, under repetitive load conditions, the bones with PMMA luting demonstrated a notably higher resistance to failure. There was a 7.2-fold increase in the cycles to failure for the bones with luting compared to those without, pointing to an increased fatigue life for the luted bones.
Conclusions
- The study concludes that luting with PMMA can enhance the resilience of a LC-DCP bone fixation under repetitive load conditions, essentially increasing the ‘fatigue life’ of the fixation.
- Therefore, under these specific in vitro conditions, luting appears to be biomechanically superior for such types of bone fixations.
Cite This Article
APA
Sod GA, Hubert JD, Martin GS, Gill MS.
(2005).
An in vitro evaluation of plate luting using osteotomized equine third metacarpal bones with a limited contact-dynamic compression plate.
Vet Surg, 34(6), 587-593.
https://doi.org/10.1111/j.1532-950X.2005.00091.x Publication
Researcher Affiliations
- Department of Veterinary Clinical Sciences, School of Veterinary Medicine, Louisiana State University, Baton Rouge, LA 70803, USA. gsod@vetmed.lsu.edu
MeSH Terms
- Animals
- Biomechanical Phenomena
- Bone Cements / therapeutic use
- Bone Nails / veterinary
- Bone Plates / veterinary
- Cadaver
- Compressive Strength / physiology
- Fracture Fixation, Internal / veterinary
- Fractures, Bone / surgery
- Fractures, Bone / veterinary
- Horses / injuries
- Horses / surgery
- Metacarpal Bones / injuries
- Metacarpal Bones / surgery
- Osteotomy / methods
- Osteotomy / veterinary
- Polymethyl Methacrylate / therapeutic use
- Random Allocation
- Torsion Abnormality / veterinary
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