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Patella infera

In patella infera the kneecap (patella) rides too low down the femur (thighbone).

The condition is also known as patella baja. It is the opposite of patella alta - where the kneecap rides too high on the femur.

This may occur on its own or, more commonly, it may be a result of the patellar tendon shortening after surgery or injury and pulling the patella downwards. This condition causes pain rather than dislocation.

Conditions associated with patella infera

Some of the conditions more commonly associated with the development of patella infera include -

To put the condition into true perspective it is useful to learn about arthrofibrosis, where patella infera may become the endpoint in a cascade of problems associated with the above conditions.

Synonyms: 
Patella baja

Quick guide to kneecap problems

27 Aug, 2008

An overview of common patellar problems.

The problem of patella baja

01 Aug, 2008

Also called 'patella infera'.

1991 - The early diagnosis and treatment of developmental patella infera syndrome

04 Nov, 2007

An 'interpretation' of a 1991 publication, describing how to recognise the early stages of internal scarring causing the patellar to pull down into an 'infera' position.

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Word of the Day

A hamstrings graft is a transplant replacing a torn cruciate ligament using one of the hamstrings tendons from the back of the knee - the semi-tendinosis, together with another muscle, the gracilis.

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