What is Type 3 patella?
In 1941, Wiberg 18 classified patellar morphology as follows: type I patella had two concave facets of approximately equal size; type II patella had two concave facets where the medial facet was smaller than the lateral facet; and type III patella had a convex medial facet and a concave lateral facet.
What is normal patella tracking?
This measurement is the ratio of the patellar tendon length compared to the patellar height with the knee bent to around 30 degrees. A ratio of around 1.0 is considered normal. A ratio less than 0.80 is indicative of an inferior patella or “patellar baja” that may be due to a shortened patellar tendon.
What is a Wiberg type 2 patella?
Wiberg classification is a system used to describe the shape of the patella based mainly on the asymmetry between the patellar medial and lateral facets on axial views of the patella. Increasing number type indicates a larger degree of asymmetry. This case is a good example of Wiberg type 2 or b.
How common are patellar fractures?
Patella (kneecap) fractures (broken kneecap) are common injuries. About 1% of all broken bones are broken kneecaps. Fractures of the patella are most often caused by a direct blow to the knee, such as a fall or motor vehicle accident.
What is patella dysplasia?
Some people are born with a shallow trochlear groove (= trochlear dysplasia). Some people have an L-shaped or completely flat back surface to their patella (= patellar dysplasia). An abnormally shaped patella + trochlear groove together, at the same time, is termed ‘patellofemoral dysplasia’.
How do you fix patellar tracking issues?
Most patellar tracking problems can be treated effectively without surgery. Non-surgical treatment may include rest, regular stretching and strengthening exercises, taping or bracing the knee, using ice, and short-term use of non-steroidal anti-inflammatory drugs (NSAIDs).
Is patella sesamoid bone?
The patella is a sesamoid bone located in the major extensor tendon of the knee joint, in the hindlimb of many tetrapods. Although numerous aspects of knee morphology are ancient and conserved among most tetrapods, the evolutionary occurrence of an ossified patella is highly variable.
How do you fix knee dysplasia?
The only way to ‘cure’ it is to perform a patellofemoral resurfacing arthroplasty (a partial knee replacement), but this is a fairly major op that involves putting in an artificial joint, and this is normally reserved only for older patients and/or patients with severe symptoms and severe damage.
Do you need surgery for patellar tracking disorder?
Surgery usually isn’t needed for patellar tracking disorder. You may need surgery if your kneecap dislocates after other treatments haven’t worked. There are several types of surgery that can correct a tracking problem. You and your doctor can decide which surgery is best for you.
How do I fix my patella tracking problem?
Are sesamoid bones normal?
Sesamoid bones are common in humans, and vary in number. As many as 42 sesamoid bones can be found within a single person2.
Can patella alta be cured?
If a patient has significant patella alta that is causing specific problems (instability and/or patellofemoral wear/pain) then this can be treated effectively by surgically shifting the patella downwards by however far is necessary to put it into the normal position.
Is patella alta curable?
What causes knee dysplasia?
Most cases of trochlear dysplasia are believed to be genetic. There may be some cases where somebody sustains a kneecap dislocation that is not put back in place when they are young and developmentally the trochlear groove may not form normally, but overall most cases of trochlear dysplasia are felt to be genetic.