Osteo arthritis (OA) is the most common type of non-inflammatory
arthritis. It happens when the cartilage of the joint begins to break
down or wear away. The part affected the most is weight bearing joints
such as the neck, hip and knee. When the cartilage, the material serves
as cushion for joint start to erode, the bones begin to rub each other
causing pain, stiffness and inflammation.
OA can be classified to primary and secondary types. The primary type is associated with aging and the degeneration of cartilage, often referred to as ‘wear and tear’. The older persons have a higher chance of getting primary OA.
The secondary OA is linked to factors such as obesity, injury, hereditary, etc. Carrying extra weight puts pressure on the weight bearing joint such as knee and hip. Over exercise after injury may lead to OA later in life. An aggressive and repetitive activity may hurt the joint. A major operation on particular site could be the leading cause to develop OA at later stage of life.
Other causes of OA remain unknown.
OA, Available from http://www.webmd.com/osteoarthritis/guide/osteoarthritis-causes (Assessed 10 May 2009)
OA, Avaolable from http://www.arthritiscare.org.uk/AboutArthritis/Conditions/Osteoarthritis (Assessed 10 May 2009)
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