MS- Growth Plate Injury and Repair.txt
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The growth plate is mad of ___________ and lacks a ____________.
soft cartilage; blood supply
Excessive forces in ____(3)____ can result in disruption of the growth plate.
bending, shear, or torsion
How do we classify growth plate fractures?
If the epiphysis is also fractures into the joint, then _________ can also be injured; ________________ are most vulnerable to disrupting forces and growth plate fracture.
articular cartilage; long bones with distal moment arm (radius, tibia, metacarpi/tarsi)
If the joint is involved in a growth plate fracture, ____________ can be important to help prevent DJD.
reduction of the articular surface
Distal radius and tibia growth plates normally close at about ___________ [age] in horses and __________ in cattle.
24 months; slightly earlier
The distal metacarpus/tarsus GP closes at ________[age] in large animals.
___________ is a key vascular contributor to healing.
In horses, it is recommended that the plates and screws be removed in the very young because...
the plates can become so buried, they cannot be removed when the animal is an adult.
In young horses, it is important to try to establish _________ and _________ early after repair of a GP.
____________ is the preferred method of repaired a GP fracture if expenses and fracture configuration allow because...
Internal fixation; the animal can be immediately weight-bearing.
Complications of GP fractures include...
all those of fractures in general plus the chance of physiodesis (premature closure of GP)
If only a portion of the GP closes prematurely, then the limb will...
become deformed (can lead to lameness).
If an angular deformity begins after the fracture, early intervention to ___________________ can prevent the angular deformity with a ___________.
stop the growth of the rest of the GP; transphyseal screw
Once a limb deformity develops to a greater extent after GP fracture, ___________ may be needed to repair it, if it is even reparable at all.
The GP is vulnerable to trauma due to the inherent weakness at the _____________ of cartilage.
A SH Type I fracture is...
through the GP
A SH Type II fracture is...
through the GP and metaphysis
A SH Type III fracture is...
through the GP and epiphysis.
A SH Type IV fracture is...
through the GP, metaphysis, and epiphysis.
A SH Type V fracture is...
crushing GP fracture (uncommon).
What are 3 more commonly affected growth plates in LA?
olecranon apophysis, proximal radius, distal metacarpus/tarsus
End of a bone where there is a tendon insertion.
What GP is not commonly affected because it is protected?
What 2 GPs are convoluted and therefore not commonly affected?
distal tibia and radius
Radius curvus is caused by ___________ of the __________ with a __________ fracture of the ___________.
premature closure; ulnar distal GP; SH Type V; distal ulna
4 principals of SH fracture treatment in LA.
- 1. anatomic reduction
- 2. stable fixation
- 3. preservation of blood supply
- 4. early active pain-free mobilization
A SH Type I fracture that displaces the olecranon apophysis presents as.... [MOST COMMON SH FRACTURE IN LA]
non-weight-bearing forelimb, dropped elbow, distracted apophysis on radiograph
Why is a SH Type I displacement of the apophysis the most common SH fracture in LA?
strong pull of triceps pulls off the apophysis
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