Methods: Thirty eight patients, ASA1～2, scheduled for extreme and bone surgery using Ilizarov instrument were randomized into two groups, each was performed spinal aneasthasia with ropivacaine or salovacaine dicaine mixture and the anesthesiatic efficiency (the efficiency of separation of feeling and motion) were observed and compared.

Causes and countermeasures for the internal fixators loosening or rupturing after internal fixation with AF system for thoracolumbar fractures;

Objective To explore the causes and countermeasures of the internal fixators loosening or rupturing after internal fixation for thoracolumbar fractures.

AIM To study the pullout force of pedicle screws with different forms of thread and to supply the experimentdata for the clinical application of transpedicular internal fixators.

Three dimensional finite element analysis on the pressure of femoral head affected by dynamic hip external fixator;

Treatment of metacarpal and phalangeal fractures with micro-external fixator;

Using external fixator effectively in the treatment of trauma;

Treatment of intra-articular calcaneal fractures with external fixators;

The treatment of the infected tibial nonunion by open bone grafting and AO external fixators

[Method]In accordance with pathological changes and requirements for correctioning talipes equinus,cavus,calcaneus and forefoot varus or valgus,four standard external fixators were designed on the basis of Ilizarov apparatus assembly and tested biomechanically to correct the above.

Objective: To investigate the rehabilitation measures of intertrochanteric fracture of femur in the elderly treated with external fixation.

Objective To explore the method and effects of using unilateral external fixation to treat nonunion humeral fracture.

The biomecbanical comparative study of three kinds of external fixation in tibial-fibular fractures.