Outcome After Tantalum Rod Implantation Treatment For Early Stage Anfh

Purpose of the study:Porous tantalum screw insertion in the femoral head is a new treatment for the early stage ANFH.This study aim to estimate new treatment effect。Methods:The tantalum screw insertion have the selected standard,non-traumatic ANFH at early stage(Ficat stageⅡ). the tantalum screw insertion group include 9 cases(llhips),male 10 cases,female 1 case,mean aged 38.7 (32-50) years, who all underwent surgery during the period of 2009.3-2009.12.we collect the surgical information,blood loss and operation time.Also we evaluate the hip function with Harris score system before and after operation.meanwhile, we follow up the X-ray image evaluate the lasting time before femoral head collapse.Rensults:The tantalum screw insertion group has a less blood loss and operation time.The tantalum screw insertion group have a superior post-operation Harris score.We followed up in this groups,average 8.5 (4-12) months for tantalum screw insertion group. Kaplan-Meier analysis at 8.5 months resulted in an 100% survivorship for the tantalum implant and bone graft transplantation。Conclusion:the tantalum screw insertion is a mini-invasive procedure,it take less time for the patient to recover,and the short term therapeutic effect is encouraging.But,the function of prolonging the head collapse is not very obvious,the final therapeutic effect for the tantalum screw insertion should not be determined before more long term and large amount follow up study.