Patellar Tendon Repair

Introduction

Patellar tendon repair is a surgical procedure used to treat a complete tear of the patellar tendon, a serious injury that prevents the knee from straightening. The patellar tendon connects the kneecap (patella) to the shin bone (tibia) and is essential for walking, standing up, climbing stairs, and jumping. When this tendon is completely torn, patients cannot actively straighten the knee or support their body weight normally. Because a complete tear does not heal on its own and leads to major loss of function, surgery is almost always recommended to restore normal knee movement and strength.

Technique of Performing a Patellar Tendon Repair

During patellar tendon repair surgery, the surgeon makes an incision over the front of the knee to access the torn tendon. The damaged ends of the patellar tendon are carefully identified and then reattached to the kneecap, often using strong sutures, anchors, or tunnels drilled into the bone for secure fixation. If the tendon tissue is weakened, additional reinforcement techniques may be used to protect the repair while it heals. The goal of the procedure is to restore the normal length and strength of the patellar tendon so the knee can straighten properly again.

Recovery from a Patellar Tendon Repair

Recovery after patellar tendon repair is gradual and carefully controlled. Patients usually wear a knee brace that keeps the leg straight for the first few weeks to protect the repair. Weight-bearing is often allowed early, but knee bending is limited at first and slowly increased over time. Physical therapy plays a key role in recovery, focusing on restoring knee motion, rebuilding strength, and improving walking mechanics. Most patients can return to daily activities within a few months, while full recovery—including sports or high-impact activities—often takes 6 to 12 months.

Potential Complications and Prognosis

As with any surgery, patellar tendon repair carries risks, including infection, blood clots, stiffness, weakness, or re-tearing of the tendon. Some patients may also experience ongoing pain or reduced strength. However, when the surgery is performed promptly and followed by proper rehabilitation, the overall prognosis is generally good. Most patients regain the ability to straighten the knee, walk normally, and return to an active lifestyle, including sports in many cases.

Edited by Amari Eubanks and Stephen Pinney MD. December 22nd 2025.