May also be called: Knee Dislocation; Dislocation of the Patella Patellar dislocation happens when the patella (kneecap) slips out of its normal position. More to Know Patellar dislocation can happen as a result of a direct blow to the knee or when the knee gets twisted during sports play or in an accident. The patella may move back into place on its own, or the doctor may gently put the patella back with a quick maneuver called a reduction. To help keep the patella from dislocating again, an immobilizer or brace must be worn on the knee for a few weeks and crutches might be needed to help with walking. Usually, a person can return to most normal activities within a couple of months, although returning to sports participation can take longer. Keep in Mind With rest and proper treatment, most people who have had a patellar dislocation can gradually return to their normal activities. All A to Z dictionary entries are regularly reviewed by KidsHealth medical experts. Back to Articles Related Articles Jumper's Knee Jumper's knee is an overuse injury that happens when frequent jumping, running, and changing direction damages the patellar tendon. Read More Jumper's Knee Jumper's knee is an overuse injury that happens when frequent jumping, running, and changing direction damages the patellar tendon. Read More Knee Injuries Healthy knees are needed for many activities and sports and getting hurt can mean some time sitting on the sidelines. Read More Meniscus Tears The key to healing meniscus tears is not to get back into play too quickly. Find out what meniscus tears are and how to treat them. Read More Patellofemoral Pain Syndrome (Runner's Knee) Patellofemoral pain syndrome (or runner's knee) is the most common overuse injury among runners, but it can also happen to other athletes who do activities that require a lot of knee bending. Read More X-Ray Exam: Knee A knee X-ray can help find the causes of pain, tenderness, swelling, or deformity of the knee, and detect broken bones or a dislocated joint. Read More Slipped Capital Femoral Epiphysis (SCFE) A good, stable connection at your hip joint is what lets you walk, run, make that jump shot, and shake it on the dance floor. But in some teens – particularly those who are obese – the hip joint is weakened by slipped capital femoral epiphysis (SCFE). Read More Note: All information is for educational purposes only. For specific medical advice, diagnoses, and treatment, consult your doctor. © 1995-2021 KidsHealth®. All rights reserved. Images provided by The Nemours Foundation, iStock, Getty Images, Veer, Shutterstock, and Clipart.com.