OA

Written by Dr Sheila Strover on March 14, 2025

OA is an abbreviation of 'osteoarthritis'.

This is a photograph taken during keyhole surgery. The joint surfaces within the knee showing osteoarthritis breakdown of the usually shiny white joint cartilage - you can even see the yellower bone showing underneath.

grade-4-cartilage-damage_02_0.jpg

What causes OA in the knee?

OA (osteoarthritis) in the knee can be caused by excessive stress on any one part of the joint - such as being overweight, having an incompetent meniscus, poor limb alignment, and injury.

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