Porous tantalum implant for treatment of early-stage osteonecrosis of the femoral head: a minimum 5-year follow-up study

Yu Zhang,Zhi Yang,Zi-Jian Hua,Shuo Feng,Wang Chen,Xiang-Yang Chen,Jian-Ning Sun,Zheng-Hao Hu

doi:10.1186/s12893-021-01352-7

Abstract

BackgroundTo evaluate the survival rate of porous tantalum rod implantation in the treatment of osteonecrosis of the femoral head (ONFH), evaluate its clinical effect and imaging results.MethodsFrom January 2008 to December 2013, porous tantalum rod implantation for ONFH was performed in two institutions. Statistical analysis of operation data, including operation time, blood loss and blood transfusion were recorded.Results52 hips received complete follow-up, the average follow-up time was 85.7 months (60–132 months). 24 hips turned to THA at the end of follow-up (46.2%), the average time was 44.3 ± 32.8 months, and the average Harris hip score before THA was 57.1 ± 7.6. Cox proportional-hazards model revealed that Association Research Circulation Osseous (ARCO) stage (P = 0.017), bone marrow edema (P = 0.006) and age > 40 years (P = 0.043) were independent risk factors for conversion to THA.ConclusionARCO stage, age and bone marrow edema were risk factors for the failure of porous tantalum rod implantation to convert to THA.

Highlights

To evaluate the survival rate of porous tantalum rod implantation in the treatment of osteonecrosis of the femoral head (ONFH), evaluate its clinical effect and imaging results
Many studies have reported that porous tantalum rod implantation has achieved good early clinical effect in the treatment of Osteonecrosis of the femoral head (ONFH) [4, 8, 9]
Cox proportional-hazards analysis revealed that Association Research Circulation Osseous (ARCO) stage (P = 0.017), Bone marrow edema (P = 0.006) and Age > 40 years (P = 0.043) were independent risk factors for conversion to Total hip arthroplasty (THA); While conversion to THA were not correlated with Bilateral disease, Corticosteroids intake, Harris hip score ≥ 80 points, gender and osteonecrotic lesion ≥ 30%. (Table 4)

Summary

Results

52 hips received complete follow-up, the average follow-up time was 85.7 months (60–132 months). 24 hips turned to THA at the end of follow-up (46.2%), the average time was 44.3 ± 32.8 months, and the average Harris hip score before THA was 57.1 ± 7.6.

Background

Materials and methods

Result

Conclusion

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