can you break a kneecap
The Patella fracture may consist of a single crack across the kneecap or the kneecap may be broken into several pieces, in what is known as a 'stellate' fracture. In some instances a forceful contraction of the Quadriceps muscles can be enough to cause a fracture of the patella. This causes a horizontal crack across the knee cap, which makes it impossible for the patient to straighten their knee.