What causes arthritis?

For many older people, the bone changes as the age increases. Among all kinds of Department of orthopedics diseases, arthritis is a disease which is very easy for middle-aged and elderly people. But any disease is A thing has its cause. So, what are the factors that lead to arthritis?
The etiology of arthritis currently has the following:
I. subchondral bone rigidity makes joint cartilage lose the corresponding strain ability, especially can not bear transverse stress, easy to produce shear, make cartilage produce horizontal split. The reason why subchondral bone stiffness is unknown is that there may be a lack of the necessary momentum associated with the musculoskeletal system and that the bone and cartilage lose pulsed stimulation force.
Two. Cartilage degeneration and collapse of the majority of people believe that the pathological changes of arthritis is the initial lack of glycogen and protein collagen cartilage matrix, then the superficial cartilage cells decreased, the articular cartilage was loosened in the joint cavity, not prone to breaking stress. In biochemistry, the aging cartilage water loss, chondroitin sulfate 6 and chondroitin sulfate 4 ratio increased, a variety of cartilage cracking enzymes also appear accordingly. These enzymes are derived from the cartilage itself, and the cellular components in synovial and synovial fluid are unclear.
Three. Mechanical changes, in order to maintain mechanical balance, the hip must withstand 3-4 times the weight of force, this force is the body weight and hip abductor muscle vertical force. Any factor that reduces the surface area of the joint can increase the negative weight per unit area. In the case of hip, head diameter unchanged, the section surface area to 11.5 cm, to 4.71 cm, a difference of as much as 250%.

Four. Subchondral bone stiffness makes joint cartilage lose the corresponding strain ability, especially can not bear transverse stress, easy to produce shear, make cartilage produce horizontal split. The reason why subchondral bone stiffness is unknown is that there may be a lack of the necessary momentum associated with the musculoskeletal system and that the bone and cartilage lose pulsed stimulation force.
For the elderly group, arthritis will seriously affect the well-being of elderly people. Therefore, I hope that middle-aged and elderly friends can do prevention work in daily life and reduce the risk of arthritis. In addition, middle-aged and elderly, if the symptoms of arthritis in the body, then, in order to ensure their quality of life, must immediately go to the hospital for treatment.