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· DOS Abstracts
Evaluation of Treatment of Bone Bridges After Injury
to the Growth Plate
Ahmed Abdul-Hussein Abood, Bjarne Møller-Madsen, Juan Manuel Shiguetomi-
Medina, Casper Bindzus Foldager, Ole Rahbek
Paediatric Ortopaedics, Aarhus University Hospital
Background:
Fractures involving the growth plate can cause bone bridge for-
mation leading to leg length discrepancy, angular bone deformities, and early
secondary arthrosis. The gold standard treatment is to remove the bone bridge
surgically and replace it with fat.
Purpose / Aim of Study:
The purpose was to evaluate bone bridge formation
using the gold standard compared with no treatment using MRI in a porcine
model.
Materials andMethods:
In five immature female pigs the distal femoral growth
plate was identified using fluoroscopy. The medial part of both growth plates
was injured in a standardised procedure using a 6 mm cannulated drill bit oper-
ated manually. The injury included the metaphyseal and epiphyseal part of the
bone to simulate a gap after excision of a bone bridge. The defects were rinsed
sterile saline. Defects in both hind legs were randomized to filling of subcutane-
ous fat (group A, n = 5) or no filling (group B, n = 5). The animals were followed
for 14 weeks. Three-dimensional MRI including water- content were performed
at 14 weeks and followed by euthanasia. Presence or absence of a bone bridge
was determined on MRI.
Findings / Results:
Bone bridge formation was confirmed in 60% of the ani-
mals for group A and 100% for group B. Water-content MRI shows less water-
content in the injured part of the growth plate compared to the uninjured all the
animals in both groups.
Conclusions:
Bone bridge formation was seen less frequently in the group
treated with the current gold standard, nevertheless a bone bridge still occurred
in 60% of the animals. Hence, there is a need for further investigation of alter-
native treatment options for bone bridge formation.
No conflicts of interest reported
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