Patellar Tendon and Quadriceps Tendon Tear

No one ever thinks about their quadriceps tendon or patella tendon until they have injured them. They are integral to human functioning for walking, climbing, standing up from a chair or the ground, and running. As an  orthopedic surgeon, I am privileged to see what unfortunately can happen to someone who tears their tendon. It makes me appreciate the human body so much more when I see the disability of this injury. A quadriceps or patella tendon tear can make someone immobile and unable to walk which is the reason why it is an absolute indication for surgery.

As you can see the quadriceps tendon attaches to the superior aspect of the patella. The patella tendon then connects the patella to the tibia.

quadriceps tendon patellar tendon

When one of the tendons is not connected to the patella, an injured person can’t lift their tibia and ultimately their foot off the ground. This injury is pretty rare in Crossfit in my practice but it can occur anytime the tendon’s strength is exceeded. It typically occurs in that age group of 40 to 60-year-olds when people are still very active and can generate enough force that they are able to rip their tendons from the bone. An 80-year-old usually doesn’t have this injury unless there is a fall.

As with any tendon injury, and quite simply, a tendon can pull away from the bone when the force exerted on it exceeds the strength of the tendon attachment. Classically it occurs with an eccentric contraction. This occurs when the muscle and tendon lengthen during a contraction. This can occur jumping down from a box jump or during sudden heavy squat. When you land your quadriceps contract and as your knee bends, the quad and patella tendon lengthen. If you then generate enough force the tendon can then pull away. So then what happens. If you can’t lift your leg and there is a big divot near your kneecap that you can feel, then this is the diagnosis and you need to see a surgeon. 

When the exam and the X-ray confirm the diagnosis, you can then undergo a repair. X-ray below shows a  because the patella tendon is torn and the quad pulls the patella higher than normal. When the quadriceps tears, the patella lowers and you can have a patella baja.

patella-alta - high-patella

An MRI is sometimes useful in partial tears or when the exam is not absolutely certain.

The surgery involves reattaching the tendon through the bone and repairing the joint capsule or retinaculum.



The pictures shown next are graphic intraoperative photos taken with the permission of the patient.

Here are the steps to repair a PATELLAR tendon tear:

Torn patella tendon to left, the white is the femur, and to the right the circular red structure is the kneecap or patella

patellar-tendon- quadriceps tendon- repair-1

2 Sutures secure the patella tendon into one bundle

Drill 3 tunnels in patella

patellar-tendon-quadriceps- tendon repair-3

Pass sutures through tunnels

Patellar tendon quadriceps tendon repair-4

4 suture limbs go through three tunnels

Patellar tendon quadriceps tendon repair-5

Tie sutures on other side of patella bringing tendon back to patella

Patellar tendon quadriceps tendon repair-6


Below are the steps for a QUADRICEPS tendon repair:



Quad tendon to right, patella to left


Sutures in quad tendon

Drill pin in patella to pass sutures

Eyelet in pin with sutures in it passed through patella

Sutures passed through patella


Physical therapy and rehab is extensive. It starts with a brace and crutches for about six weeks weight bearing as tolerated. Range of motion is begun usually in the first 2 weeks and can take 6 to 8 weeks to get full range. Strengthening has to wait until the tendon grows into the bone starting at 6 weeks. It can take 4 months before running again and 6 to 8 to get really strong again. Typically, people return to full activities and strength returns after an extensive rehab.





  1. I’m 4 weeks post op today from a ruptured quad repair. I’m doing quad sets, ankle pumps, and hip flexor exercises at home. I’m able to bend at about 45 degrees with no discomfort. I can’t perform a leg lift yet. How long does this usually take? Since it’s my right leg how long do patients typically take to resume driving? Thanks for the blog.

    • Can’t comment on yours in particular, but every tear is different. Leg lifts can sometimes take 6-8 weeks, and driving is something you need to ask your surgeon about but can take months.

  2. Hi Sean – thanks for this post. This is the best one I have found thus far. My husband had quad tendon repair surgery yesterday. He’s about 6ft and 300 lbs. needless to say, today has been awful for him even with oxy in him every three hours with XS Tylenol mixed in. I’m concerned about his leg not being straight but his brace is locked out. He can walk but it’s extremely painful. Even when laying down he’s is horrible pain. Will this get better in a few days where he is constantly in pain ? We have a pillow under his leg starting at his butt and going to foot but if we go higher it hurts worse. Could you give any advice to keep us sane? Thank you!

    • I am sorry I can’t treat or care for anyone over the internet. Please check in with your doctor.

  3. My inner quads aren’t working after total knee replacement. Can I ever get strength back in my thigh again? It’s been a year after my surgery

    • I don’t know about your specific case. Patients tell me that it can take a long time to get strength back.

About Me

D Sean Rockett, M.D., is an orthopedic surgeon and senior partner of Orthopedics New England with offices in Natick, Newton and Hopkinton, MA. Dr. Rockett is a CrossFit Level 2 Trainer and co-owner of CrossFit Launchpad. He also enjoys being the head orthopedic surgeon of the CrossFit Games Medical team.

About 321GOMD Blog

This blog pro­vides gen­eral infor­ma­tion and dis­cus­sion about med­i­cine, health and related sub­jects. The words and other con­tent pro­vided in this blog, and in any linked mate­ri­als, are not intended and should not be con­strued as med­ical advice. If the reader or any other per­son has a med­ical con­cern, he or she should con­sult with an appropriately-licensed physi­cian or other health care worker.

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