Experimental Studies on the Treatment of Avascular Necrosis of the Femoral Head Resulting from Femoral Neck Fracture by the Fracture Hip Support Joint Implantation

To investigate the therapeutic efficacy of Fracture Hip Support Joint (FHSJ) implantation on the fresh femoral neck fracture(FNF)to rescue the avascular necrosis of the femoral head(ANFH),36 skeletal mature hybrid dogs were equally divided into experimental group and control group at random. The animal model of femoral neck fracture was adopted by dislocating the hip joint and cutting the femoral neck. FHSJ was planted into the hips of the experimental group. On the contrary, dislocations were repositted and two screws were fixed on the fracture of the contral group.At 12 weeks, all of the animals both in the experimental group and the control group caught the ANFH. At 24 weeks, the ANFH in the experimental group was partly restored. The ANFH bacame worse in the control group. At 48 weeks, the ANFH in the experimental group was healed. At the same time, dogs in the contol group had the cave-in of the femoral head. The plantation of FHSJ, is an available method to prevent the avascular necrosis of the femoral head with the femoral neck fracture