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classification system for AC joint sprains

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Grade
Structures involved
s/s
Type II   rupture of the AC ligament and partial damage to coracoclavicular   sligh laxity, and deformity of AC joint-slight step deformity  
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Type III   complete tearing of AC and coracoclavicular, possible involvement of deltoid and trapezius fascia   obvious dislocation of distal end of clavicle from acromion process  
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Type IV   complete tearing of AC and coracoclavicular and tearing of deltoid and trapezius fascia   posterior clavicle displacement into the upper fibers of the trapezius  
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Type V   Same as IV   displacement of clavicle from acromion one to 3 times height of clavicle when compared to opp limb, clavicle post displacedw/ stripping away of deltoid-trapezius aponeurosis  
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Type VI   Same as IV   displacment of clavicle inferiorly under coracoid(possible involvement of brachial plexus)  
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Type I   slight to partial damage to AC ligament and capsule   point tenderness over AC joint, no laxity or deformity noted  
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Created by: jwebst1
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