IJSR International Journal of Scientific Research 2277 - 8179 Indian Society for Health and Advanced Research ijsr-9-11-31785 Original Research Paper OUTCOME OF CORE DECOMPRESSION IN AVASCULAR NECROSIS OF FEMORAL HEAD USING MULTIPLE SMALL DIAMETER DRILLING Uikey Dr. Vipin Singh Dr. Harendra Singh Dr. November 2020 9 11 01 02