[A summary of hip-preservation surgery based on peri-collapse stage of osteonecrosis of femoral head].

OBJECTIVE: To summarize surgical procedures of hip-preservation based on peri-collapse stage of osteonecrosis of the femoral head (ONFH).

METHODS: The basic points of peri-collapse stage theory was expounded. The related literature on surgical procedures was summarized and analyzed based on the theory.

RESULTS: Surgical procedures of hip-preservation tend to emphasize on mechanical repair, giving consideration to biological repair. It is consistent with the essence of peri-collapse stage theory, which attaches great importance to biomechanical stability.

CONCLUSION: Peri-collapse stage theory has a guiding significance to the choice of surgical timing and approach, and it is one of the important theoretical basis for hip-preservation treatment.