What are the pathological characteristics of aseptic necrosis of lunate bone?

summary

Aseptic necrosis of the lunate bone occurs in young people aged 20-30. At this time, the epiphysis is closed, so it is not a chronic injury of the epiphysis, but a chronic injury of the bone. What are the pathological characteristics of aseptic necrosis of lunate bone? Next, I'd like to share my views with you.

What are the pathological characteristics of aseptic necrosis of lunate bone?

Slow onset, wrist pain, fatigue, aggravation during activity, relief after rest. With the aggravation of the pain, the wrist gradually swelled and the activity was limited, so it was unable to adhere to the original work. Physical examination showed that the wrist back was slightly swollen, and there was obvious tenderness in the lunate bone area. When the third metacarpal head was knocked, the lunate bone area was painful. The movement of wrist joint was limited in all directions, especially in dorsiflexion

X-ray showed no abnormality in the early stage. A few months later, the bone mineral density increased. The surface was not smooth and the shape was irregular. There was cystic absorption in the center of the bone. There is osteoporosis around the carpal bone. Radionuclide bone imaging can early detect abnormal radioactive concentration in lunate bone.

In the early stage, the wrist joint can be fixed at 20-30 degrees of dorsiflexion ° A bit. It usually takes about one year until the shape and blood supply of lunate bone are restored. If the fixator is removed too early, the disease is easy to recur.

matters needing attention

Prevention should start from various possible causes and take preventive measures. Prevent hand injury, try to avoid wrist overwork. For some occupations that need to use vibrating tools, such as pneumatic pick, we should take some work protection or pay attention to rest.