ThP2.17 - Efficacy of Mesenchymal Stem Cells in the Treatment of Osteonecrosis of Femoral Head

Abstract Introduction Osteonecrosis of the femoral head (ONFH) has substantial morbidity and impacts patient populations worldwide. Mesenchymal stem cells (MSCs) are implicated for their potential in ONFH treatment. The objective of this study is to examine the effectiveness of MSC when compared to existing surgical options in the treatment of ONFH. Method A literature search is conducted through Pubmed, MedlineOvid, and Cochrane. The studies were selected using PRISMA and ROBVIS. Four randomised controlled trials and two preliminary studies with a total of 599 participants were included in the study. Results Progression to advanced stages of ONFH was reduced in bone marrow mesenchymal stem cells (BMMSC) applied in conjunction with core decompression (CD) when compared to CD alone (3.77% vs. 22.7%, p<0.05) and reduced femoral head collapse (28% vs. 72%). Improvement in Hip Harris Score (HHS) when compared to CD alone (31.85 vs. 19.72 control, p = 0.03) was also observed. The joint preservation rate of applying BMMSC in tantalum rod insertion with vascularized iliac grafting in end-stage ONFH patients was greater than that of vascularized iliac grafting alone (83.33% vs. 57% in stage IV patients) and associated with a better outcome (HHS 6.29±6.11 to 77.23±14.75). Improvement in WOMAC, VAS and Lequesne index was also observed when comparing CD with bone grafts and CD, bone grafts and BMMSC. Conclusion The use of MSC applications along with current surgeries has been shown to improve post-operative outcomes and progression to advanced ONFH stages in the treatment of ONFH compared to surgeries done alone.