The Biomechanics Of DHS With A Single CCS And Three CCS For Treatment Of Carotid Femoral Neck Fractures: A Comparative Study

objective：To investigate biomechanical features of dynamic hip screw(DHS) with asingle cannulated compression screws(CCS) versus three CCS in treatment of carotidfemoral neck fracture，and compare their advantages and disadvantages．Methods：The artificial femur was cut with a electric chainsaw according to pauwels70°and pauwels30°of human carotid femoral neck fracture to simulate the carotidfemoral neck fracture．DHS with a single CCS and three CCS(the inverted triangle)wereimplanted into the fractured femurs to establish carotid femoral neck fracture fixationmodels,which were tested and proved by means of experiment press analysis．Result: From the femoral strength, stiffness and stability, bearing capacitytest,anti-torion results show that the biomechanical function of DHS with a single CCSwas better than that of three CCS in treating carotid femur neck fracture(P<0.05).Conclusion:The treatment of the carotid femur neck fractures with DHS with a singleCCS and three CCS internal fixation, DHS with a single CCS fixed more firm,biomechanics superior performance,is an ideal fracture internal fixation method totreatment of the carotid femur neck fractures,especially suitable for the unstable carotidfractures of femoral neck.