Clinical Overview of Patellar Tendon Repair: Procedure, Indications, and Recovery

Patellar tendon repair is a major surgical procedure performed to reattach a torn patellar tendon to the kneecap (patella). The patellar tendon works closely with the quadriceps muscle and tendon to extend the knee joint, allowing a person to walk, run, jump, and kick. When the patellar tendon experiences a complete rupture, the structural continuity of the leg’s extensor mechanism is lost, rendering the patient unable to straighten their knee or bear weight safely. Prompt surgical reconstruction is required to restore joint function and leg stability.

The Surgical Procedure

A patellar tendon repair is an open orthopedic operation performed under general or regional anesthesia. The surgical procedure follows several precise structural steps:

1. Exposure: The surgeon makes a vertical incision over the front of the knee to expose the torn tendon and the lower edge of the kneecap.
2. Suturing the Tendon: Heavy-duty, high-strength non-absorbable sutures are woven through the torn tissue ends using specialized stitching techniques (such as the Krackow stitch) to ensure a secure grip.
3. Bone Anchoring: To reattach the tendon to the bone, the surgeon drills small transosseous tunnels vertically drabhisheksortho.com through the kneecap. The suture threads are passed through these tunnels and tied tightly at the top of the bone, pulling the tendon flush against its original anatomical position.
4. Augmentation (Optional): In complex cases or delayed repairs, a wire, structural mesh, or graft material may be placed around the joint to provide temporary structural reinforcement while the biological tissue heals.

Primary Clinical Indications

This surgical intervention is indicated for specific severe knee injuries:

• Complete Ruptures: Total structural tears where the tendon has separated entirely from the bone or split across its midsubstance, causing immediate functional loss.
• Traumatic Extensor Disruption: Acute injuries resulting from sudden, violent muscle contractions, deep lacerations, or direct high-impact trauma to the front of the knee.
• Chronic Tendon Degeneration: Failure of the tendon tissue caused by underlying chronic conditions, such as severe, untreated patellar tendinitis or systemic inflammatory diseases.

What to Expect During Recovery

The post-operative timeline requires meticulous protection of the repair site to prevent the reattached tendon from pulling away from the bone.

Immediate Immobilization: The knee is locked completely straight in a rigid knee immobilizer or a hinged brace for the first 2 to 6 weeks to prevent accidental bending.

Gradual Mobilization: Physical therapy begins early with passive range-of-motion exercises, controlled strictly within restricted angles, alongside quad-activation drills to prevent severe muscle atrophy.

Long-Term Rehabilitation: Progressive weight-bearing and functional exercises continue for months. Full structural maturation of the repaired tendon takes 6 to 12 months, after which patients can safely return to high-impact sports, running, and heavy squatting.