Snyder classification of complete rotator cuff tears

0tear lacks full thickness communication between bursal and articular surfaces
Ismall complete tear (puncture)
IImoderate < 2 cm tear involving one tendon without retraction
IIIlarge 3-4 cm complete tear involving entire tendon with minimal retraction of torn edge
IVmassive tear involving two or more cuff tendons, associated retraction and scarring of remaining tendon ends. tears irreparable