Definition
A break, especially the breaking of a bone or
cartilage.the reference to bumper is the bumper (fender - USA) of a
motor vehicle, the fracure being caused by the impact of the bumper.
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Radiographic Appearance
Compression fracture of the lateral tibial plateua,
resulting in separation at the margin of the plateua or depression
of the central portion of the artucular surface. A valgus injury of
the knee may result in a fracture of the lateral tibial plateau. At
times these fractures are difficult to identify and are obvious only
on oblique radiographs. The fractures consist of either a vertical
split through or a depression of a portion of the joint surface.
There may be an associated fracture of the neck of the fibula. When
the fracture involves the lateral margin of the plateau or is
associated with a fracture of the fibula, an accompanying disruption
of the medial collateral ligament is likely.
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Pathology
A bumper fracture is a compression fracture of the lateral tibial
condyle due to a forceful valgus stress applied to the knee. The
name is derived from the fact that a car bumper hitting the lateral
aspect of the knee when the leg is firmly planted on the ground is
one of the most common causes of this type of injury. If the medial
collateral ligament remains in tact, the lateral femoral condyle is
forced down on the lateral tibial condyle and this causes a
compression fracture. Older patients with osteoporosis are the most
prone to this type of injury. There may be a hemarthrosis, and the
lateral tibial plateau will be tender. |
Treatment:
Stabilisation and fixation where required. |
Images of
"Bumper Fratures
 
 
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Useful Link
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