The Patella – Loose Patella and Anterior Knee Pain

A Comprehensive Guide to Causes, Symptoms, Tests, and Modern Treatments

The kneecap (patella) and its groove (trochlea) form one of the body’s most complex joints. Many patients experience either a loose kneecap or pain in the front of the knee, and these problems are often caused by the knee being misaligned in one or more ways.

This page provides a comprehensive overview of the most common causes, how to properly examine the kneecap, and which treatments can help—both conservative and surgical.

Why Patella Problems Are Complex

Patella problems are complicated for both patients and healthcare providers. New information is constantly emerging, and it is important that you, as a patient, understand the basic mechanisms so that you can ask critical questions and avoid unnecessary or inappropriate treatments.

If you’re unsure, it’s often a good idea to get a second opinion.

A loose kneecap and pain in the front of the knee are symptoms—not diagnoses

There are many different causes of these symptoms. To achieve a good result, all significant misalignments must be corrected.

A strong medial patellofemoral ligament (MPFL) alone is rarely enough. It can stabilize the patella, but if the underlying mechanical problems are not resolved, function will remain poor and the pain will persist.

Most Common Causes of Patella Problems

The most common mechanical causes include:

• Trochlear dysplasia (flat trochlear groove)
• Patella alta (high-set patella)
• Rotation of the femur or tibia
• Inward pointing kneecaps also called squinting patella or in-toeing
• Tight outer ligament (hyperpressure)
• Mucosal fold (plica)
• Osteoarthritis of the Patella

Often, there are several underlying causes, and it is crucial to identify them all.

Exam: What Should You Look For?

A thorough investigation should include:

• The axis of the leg
• Rotation in the femur and tibia
• Patella height
• Trochlea shape
• Foot Position
• Clinical Tests for Plica and Stability
• MRI or CT scan if anatomical abnormalities are suspected

An MRI can show the structures, but some causes—such as a plica—are rarely visible on the scan.

Choose the topic that best suits you

Here you’ll find a structured overview of all your patella-related pages. This is the core of your landing page and should be clear to both patients and Google.

Diagnoses and Symptoms

• Loose kneecap
• Trochlear Dysplasia
• High Patella (Patella Alta)
• Anterior knee pain
• Anterior knee pain and trochlear dysplasia
• Osteoarthritis of the Patella
• Inward pointing kneecaps also called squinting patella or in-toeing

Surgeries

• Patellar Tension Release Surgery
• MPFL Reconstruction
• Arthroscopic trochleoplasty
• Trochleoplasty – English version
• Rotation of the femur and/or tibia

Example: Advanced Combined Surgery

In rare cases, a knee requires several simultaneous corrections. This page describes a patient who required four surgeries on each knee:

1. Arthroscopic trochleoplasty

2. Patellar Tuck Surgery (Patella Alta)

3. Derotation osteotomy (rotation of the femur)

4. MPFL Reconstruction

Once all relevant factors are taken into account, the outcome can be very good—even in complex cases.

My particular area of interest and expertise

For many years, my research, publications, international collaborations, and clinical experience have focused on the patella—including a loose patella, anterior knee pain, and osteoarthritis of the patella.

Feel free to read more about me and check out some of my scientific articles here 

Do I really need to get into this?

Unfortunately, patellar problems are not only complicated for you, but for your healthcare provider as well. In addition, new knowledge is constantly emerging. Your job is to learn a bit about it so you can ask critical questions to your therapist. Thankfully, there are skilled practitioners,  but don’t blindly trust them.  If in doubt, it’s a good idea to ask for a second opinion. This could be with a colleague or somewhere else entirely. I apologize for the messy site, but I hope you can still get something out of browsing around.

Loose kneecap and anterior knee pain are symptoms

There can be many and complicated reasons for having loose kneecap and anterior knee pain. It’s important to find all the causes. If surgery is required, correcting one thing is not enough. Anything that is highly skewed must be corrected, otherwise the result will not be good. Nothing is stronger than the weakest link. Some people think that just inserting a strong ligament to hold the kneecap is enough, but while it may hold the kneecap, it will cause poor function and pain. Below is an example of a 21-year-old woman from Norway who needed surgery on both legs due to both loose kneecaps and anterior knee pain. Each knee had to undergo 4 different types of surgeries in each knee, but on the other hand, it also turned out really well.

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