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Tibial Tuberosity Avulsions
If Osgood Schlatter's goes untreated, an avulsion fracture can occur. This means the tibial tuberosity breaks off (usually connected to a tendon or ligament). This injury is uncommon because our brains set limitations preventing our strong muscles from doing any damage to our bodies. Mechanisms of fracture are due to a violent eccentric contraction of the quadriceps muscles (ie push-off or landing while jumping). The fracture on the tibial tuberosity can be a complete or incomplete break away (complete usually requires surgery while incomplete can be treated with rehab or RICE). Type I, II, III



Types of Avulsion Fractures
Type I: A small fragment is displaced (proximally) and does not require surgery

Type II: The articular surface remains together and the fracture occurs at the junction where the secondary center of ossification and the proximal tibial epiphysis come together (may or may not require surgery)

Type III: Total break (through articular surface) including high change of meniscal damage that usually requires surgery