Plates include both oceanic crust and continental crust. Stable subduction zones involve the oceanic lithosphere of one plate sliding beneath the continental or oceanic lithosphere of another plate due to the higher density of the oceanic lithosphere. That is, the subducted lithosphere is always oceanic while the overriding lithosphere may or may not be oceanic.
The primary causes of arthritis include viruses, bacterial infections, injuries, autoimmune disorders, and old age. There are over one hundred different types of arthritis, and each of these types can occur as a result of a different cause.Arthritis can affect large joints and small joints.The pain might remain located to one joint, or multiple areas of the body can develop symptoms.here are over one hundred different types of arthritis, and each of these types can occur as a result of a different cause. Arthritis can affect large joints and small joints. The pain might remain located to one joint, or multiple areas of the body can develop symptoms.
1 Chronic inflammation of rheumatoid arthritis can cause permanent joint destruction and deformity. 2  Damage to joints can occur early and does not always correlate with the severity of RA symptoms. 3  The  rheumatoid factor  is an antibody that can be found in the blood of 80% of people with rheumatoid arthritis.