A dislocated knee cap is when the triangular bone covering the knee (patella) moves or slides out of place. The displacement usually occurs toward the outside of the leg. See dislocation .

Alternative Names

Dislocation - knee cap; Patellar dislocation or instability

Prevention

Use proper technique when exercising or playing sports. Maintain strength and flexibility of the knee. Some cases of knee dislocation may not be preventable, expecially if anatomic factors predispose you to dislocation.