Essential knee terminology
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- J sign search for term
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Lateral subluxation of the patella each time the patella goes into terminal extension.
- Joint search for term
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A joint is a junction between two bones.
- Joint cartilage search for term
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Joint cartilage is the shiny white gristle covering the contact surfaces of the bones in articulating (moving) joints.
- Joint reconstruction search for term
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Replacing damaged joint surfaces with biological structures rather than metal and plastic.
- Joint replacement search for term
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Joint replacement is removing damaged joint cartilage and underlying bone and replacing it with metal and plastic.
- Joint space narrowing search for term
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Joint space narrowing is when the bones of femur and tibia are closer together than normal, recognised on an X-ray taken from the front.
- JRA search for term
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Abbreviation of 'juvenile rheumatoid arthritis'.
- Jumper's knee search for term
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An overuse condition, also called patellar tendinitis or tendinosis, where the area of attachment of the patellar tendon to the patella becomes painful.
- Juvenile rheumatoid arthritis search for term
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Juvenile rheumatoid arthritis is arthritis affecting a child (under 16) in several joints where evidence exists that the condition is autoimmune - ie the child's own immune system is attacking its joints.
- Juvenile traction osteochondritis search for term
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An overuse syndrome where jumping activities in a young person causes excessive pulling of the patellar tendon on the tibial tubercle. Same as Osgood Schlatter's disorder.
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