Contact area and static pressure profile at the plate-bone interface in the nonluted and luted bone plate.
Abstract: Contact area and pressure between 6-hole broad dynamic compression plates and 20 pairs of equine third metatarsal bones were measured using nonluted and luted plating techniques. Pressure-sensitive film (pressure ranges 10 to 50 MPa and 50 to 130 MPa) was used as the static pressure transducer. Nonluted and one of two luting techniques were tested on each pair of bones; each luting technique was tested on 20 bones. Quantitative determinations of contact area and pressure were made using computerized image processing techniques. Mean (+/- SD) total contact area for nonluted plates was 18.49% +/- 3.5% of the potential plate-bone contact area. Luting increased (P < .05) total contact area to 25.56% +/- 4.0% and 31.29% +/- 6.6% for the respective luting techniques. The effects of luting on contact area were dependent on the contact pressure. At contact pressure ranges 10 to 20 and 21 to 35 MPa, luting increased contact area. In contact pressure ranges 36 to 45 and 50 to 65 MPa, plate-bone contact was inherently greatest and plate luting had no significant effect on contact area. In contact pressure ranges 66 to 99 and 100 to 126 MPa, luting decreased contact area. Contact area was increased at lower contact pressures at the expense of higher pressure contact. Contact in the middle third of the plate was 20% to 40% of the contact at either end of the plate. Plate luting increased contact area best where plate-bone contour was most similar.
Publication Date: 1995-07-01 PubMed ID: 7571381DOI: 10.1111/j.1532-950x.1995.tb01334.xGoogle Scholar: Lookup
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- Journal Article
- Research Support
- Non-U.S. Gov't
Summary
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The study analyzes differences in the contact area and pressure between bones and surgical plates, comparing two different techniques: nonluted and luted plating. It found that luted plating technique increased the total contact area between the bone and the plate.
Research Methods
- The researchers collected and used 20 pairs of equine third metatarsal bones for the experiment.
- Six-hole broad dynamic compression plates were applied using two different methods: nonluted (where no additional material is used to fill the gap between plate and bone) and luted (where a material is applied to fill the gap).
- These techniques were tested on each pair of bones with two different luting techniques tested on 20 bones in total.
- The contact area and pressure between the bone and the plate were determined using a pressure-sensitive film and computerized image processing techniques.
Results and Findings
- Before luting, they found the average total contact area was around 18.49%.
- However, once luting techniques were used, this increased to 25.56% and 31.29% respectively for the two different techniques applied.
- The effects of luting on the contact area were dependent on the contact pressure. The contact area increased when lower pressure was applied but it decreased when the plate-bone contact was greatest and higher pressure was applied.
- Thus, the luting process, through increasing the surface contact area between the plate and the bone, essentially redistributed the pressure – it increased contact at lower pressures, compensating for a decrease in contact area at higher pressures.
- Near the middle of the plate, contact was 20% to 40% of the contact at either end of the plate. The study also noted that plate luting led to an increased contact area in situations where the plate-bone contour was most similar.
Significance and Potential Impact
- The study’s findings on the effects of the luting process could have implications for how bone plates are used in surgical procedures.
- Better understanding the interactions between plating techniques, contact area and pressure may help in selecting the most suitable treatment techniques for bone fractures, potentially leading to improved patient outcomes.
Cite This Article
APA
Staller GS, Richardson DW, Nunamaker DM, Provost M.
(1995).
Contact area and static pressure profile at the plate-bone interface in the nonluted and luted bone plate.
Vet Surg, 24(4), 299-307.
https://doi.org/10.1111/j.1532-950x.1995.tb01334.x Publication
Researcher Affiliations
- Comparative Biomechanics Laboratory, University of Pennsylvania, School of Veterinary Medicine, Kennett Square, USA.
MeSH Terms
- Animals
- Bone Plates / veterinary
- Horses / physiology
- Metacarpus / physiology
- Metatarsal Bones / physiology
- Photography
- Pressure
- Reproducibility of Results
- Stress, Mechanical
Citations
This article has been cited 2 times.- Decker S, Reifenrath J, Omar M, Krettek C, Müller CW. Non-osteotomy and osteotomy large animal fracture models in orthopedic trauma research.. Orthop Rev (Pavia) 2014 Oct 27;6(4):5575.
- Patel N, Brooks RA, Clarke MT, Lee PM, Rushton N, Gibson IR, Best SM, Bonfield W. In vivo assessment of hydroxyapatite and silicate-substituted hydroxyapatite granules using an ovine defect model.. J Mater Sci Mater Med 2005 May;16(5):429-40.
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