Abstract: ［Abstract］〖HTSS〗〓The bone in living body are dynamically changing. The shape of bone, such as diameter, length, curve and so on, can be changed accordingly under stress. This kind of change of shape are regular, which is named as Zhang′s law of dynamic deformation of bone. Our team has conducted a series of studies on the dynamic deformation of bone. Based upon these studies, the laws of dynamic deformation of each bone has been described, and the dynamic deformation of bone has also been found to be highly correlated with degenerative disease. The dynamic deformation of bone is an important sign of the development of degenerative disease, which plays an important role in the selection of best treatment algorithm.

Key words: skeleton, dynamic deformation, degenerative disease