Patellar Tendon Rupture

A patellar tendon rupture is a tear of the tendon connecting the kneecap to the shinbone. It can prevent the knee from straightening and usually needs urgent evaluation.

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Typical Recovery Time

Recovery often takes 4 to 6 months depending on severity.

Symptoms

•Sudden pain
•Swelling
•Weakness
•Inability to straighten knee
•Low kneecap feeling

Common Causes

•Jumping injury
•Fall
•Forceful contraction
•Degenerative tendon
•Prior tendinitis

Treatment Options

1Surgical repair

2Immobilization

3Physical therapy

4Pain control

5Gradual return to activity

When to See a Doctor

Seek urgent care if you cannot actively straighten the knee.

Frequently Asked Questions

What is a patellar tendon rupture?

A patellar tendon rupture is a tear of the tendon that connects the kneecap to the shinbone. This tendon is needed to straighten the knee. A complete rupture is a serious injury that can make walking and lifting the leg difficult.

What causes a patellar tendon rupture?

It often occurs from a forceful jump, fall, or sudden contraction of the quadriceps muscle. It can also happen in tendons weakened by prior tendonitis or medical conditions. Basketball, football, and jumping sports can increase risk.

What are the symptoms?

Symptoms include sudden pain, swelling, weakness, and difficulty straightening the knee. Some people feel a pop at the time of injury. The kneecap may sit higher than normal.

Do I need surgery for a patellar tendon rupture?

Complete patellar tendon ruptures usually require surgery to restore the ability to straighten the knee. Partial tears may sometimes be treated with immobilization and rehab. Early evaluation is important because timing can affect recovery.

How long does recovery take?

Recovery usually takes several months. Return to sports often takes 6 to 12 months depending on healing, strength, and rehab progress. A gradual strengthening program is essential.