[From Wolff law, Ilizarov technology to natural reconstruction theory]

Wolff law was an adaptable principle of bone, Tension-Stress Principle was equal to Distraction Osteogenesis or Distraction Tissue Regeneration, The Natural Reconstruction theory was a new orthopedic perspective proposed by Prof. QIN after deformity correction using Ilizarov technology. The thought about their relationship originated from a social phenomena, that the crowds and the confusion about export choice in Beijing's subway. Ilizarov technology and Wolff law were one concept related to Mechanics, and the former is completely in line with the latter. In other words, Ilizarov technology is an extension of Wolff law, is a repeated process of micro-trauma and continuous repair of bone trabecular initiated by moden engineering, just trabecular formed along the tension-stress direction. With adjustment of mechanical force,doctor can control the process of fracture healing and bone remolding to a certain extent. Natural Reconstruction theory enlarged the defined range of Wolff law obviously. Not only guided orthopedics clinical and basic research,but also related to the dialectical thinking of the doctor-patient relationship in sociology. There was an inevitable connection among Wolff law, Ilizarov technology and Natural Reconstruction theory. The history of discovery and understanding was a continuous process of thinking,practice and integration.