14 doctors weighed in:

What causes patellofemoral pain syndrome after a tkr?

14 doctors weighed in
Dr. David Whiddon
Orthopedic Surgery - Reconstruction
3 doctors agree

In brief: It depends....

On whether the patella was resurfaced.
Some patients will still have pain if their patella was not resurfaced. They may have damaged cartilage on the knee cap that is rubbing against the implant. Unfortunately resurfacing the kneecap later often only helps about half the patients. Talk with your surgeon or get a second opinion. There may be something else going on like loosening or infection.

In brief: It depends....

On whether the patella was resurfaced.
Some patients will still have pain if their patella was not resurfaced. They may have damaged cartilage on the knee cap that is rubbing against the implant. Unfortunately resurfacing the kneecap later often only helps about half the patients. Talk with your surgeon or get a second opinion. There may be something else going on like loosening or infection.
Dr. David Whiddon
Dr. David Whiddon
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Dr. Audie Rolnick
Orthopedic Surgery
2 doctors agree

In brief: Complicated

Might be scar tissue.
My be stiffness, might be malpositioning of a component. Might be quad weakness. Might be infection, might be loosening. Too many possibilities.

In brief: Complicated

Might be scar tissue.
My be stiffness, might be malpositioning of a component. Might be quad weakness. Might be infection, might be loosening. Too many possibilities.
Dr. Audie Rolnick
Dr. Audie Rolnick
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Dr. John Ayres
Orthopedic Surgery
1 doctor agrees

In brief: It depends

Anterior knee pain after replacement may be from slight malrotation of the femoral component, referred pain from the hip or lower back (l4 nerve root), or neuroma.
A 13-month-old painful knee replacement should be aspirated for infection, blood work should be done to check sed rate and crp, and bone scan should be done to look for loosening.

In brief: It depends

Anterior knee pain after replacement may be from slight malrotation of the femoral component, referred pain from the hip or lower back (l4 nerve root), or neuroma.
A 13-month-old painful knee replacement should be aspirated for infection, blood work should be done to check sed rate and crp, and bone scan should be done to look for loosening.
Dr. John Ayres
Dr. John Ayres
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Dr. David Fisher
Orthopedic Surgery
1 doctor agrees

In brief: Multiple causes

Peripatellar pain after tka can be caused by a number of conditions.
Unresurfaced patellas can be painful. Patellar implant loosening. Undersized patellar implant leading to bone irritation. Scar formation (fibrosis). Tendonitis of the patellar or quadriceps tendons. Infection. Fibromyalgia. Fracture. Referred hip pain. Neuroma of a branch of the saphenous nerve.

In brief: Multiple causes

Peripatellar pain after tka can be caused by a number of conditions.
Unresurfaced patellas can be painful. Patellar implant loosening. Undersized patellar implant leading to bone irritation. Scar formation (fibrosis). Tendonitis of the patellar or quadriceps tendons. Infection. Fibromyalgia. Fracture. Referred hip pain. Neuroma of a branch of the saphenous nerve.
Dr. David Fisher
Dr. David Fisher
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Dr. Thomas Alost Jr
Orthopedic Surgery
1 doctor agrees

In brief: Adhesions

There are three reasons.
One is the complication of postoperative adhesions which is build up of scar tissue after surgery. The other is if your surgeon did not replace the patella surface you could be having pain due to the contact of the patella natural cartilage against the metal femoral component. The last is that the patella is not tracking properly as you bend your knee.

In brief: Adhesions

There are three reasons.
One is the complication of postoperative adhesions which is build up of scar tissue after surgery. The other is if your surgeon did not replace the patella surface you could be having pain due to the contact of the patella natural cartilage against the metal femoral component. The last is that the patella is not tracking properly as you bend your knee.
Dr. Thomas Alost Jr
Dr. Thomas Alost Jr
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Dr. Daniel Ivankovich
Orthopedic Surgery - Spine
1 doctor agrees

In brief: Causes For Knee Pain

There's many reasons why a painful total knee replacement would persist a year after surgery.
Who assigned you a diagnosis "patellofemoral pain syndrome" ? It would help to know if your patella was resurfaced at the time of total knee arthroplasty. There can be excess scar, mal-alignment of components, quadriceps weakness or other reasons for your pain. It's also critical to rule out infection.

In brief: Causes For Knee Pain

There's many reasons why a painful total knee replacement would persist a year after surgery.
Who assigned you a diagnosis "patellofemoral pain syndrome" ? It would help to know if your patella was resurfaced at the time of total knee arthroplasty. There can be excess scar, mal-alignment of components, quadriceps weakness or other reasons for your pain. It's also critical to rule out infection.
Dr. Daniel Ivankovich
Dr. Daniel Ivankovich
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