Patella fractures should not be confused with patellar tendonitis symptoms. Uncommon in the patella, but may occur in endurance athletes after repetitive force. Hairline fracture – also known as “stress” fractures, small fracture where patella remains intact.Non-comminuted (Transverse) fracture – patella has broken into 2 fragments.Comminuted fracture – patella has shattered into 3 or more fragments (may be stable or unstable).Displaced fracture – patella fragments have separated and shifted out of position, discontinuity of bony alignment.Stable (Non Displaced fracture) – patella bone fragments remain aligned.Direct force applied to this bone can cause various degrees of fracture ranging from hairline cracks to complex fractures. The patella can fracture in many ways depending on the mechanism of injury. Difficulty bending or straightening knee.Forceful contraction of quadriceps muscle.Athletic Injury – hard direct blow from athletic equipment (stick, ball, etc.).Car accident – knee hits into dashboard.Falling onto knee (particularly from a height).This injury may occur from any of the following: The patella is most commonly injured from a forceful, direct impact. The back of the patella consists of articular cartilage, which helps with smooth articulation with the bottom of the femur (thigh bone) when the knee bends and extends during activity. The patella is a small bone that is attached to the patellar tendon, which connects the thigh muscle (quad) to the shin (tibia). Patella fractures are serious injuries that require medical attention, as they can hinder your ability walk due to pain and mobility deficits. Patella fractures occur when this bone breaks due to a forceful impact. The patella, or knee cap, is a small bone that protects the front of the knee.
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