“…Avascular necrosis or osteonecrosis is a common disorder that occurs approximately in 75% of patients between 30 and 60 years and more frequently in men [ 6 ]. It can occur in all bones of the body [ 7 ] like femoral and humeral heads [ 8 ], small bones of the foot, vertebra, ankle, and carpal bones [ 9 ]: lunate (Kienböck) [ 1 ], scaphoid (Preiser's [ 10 ]), pisiform [ 11 ], and triquetrum [ 12 ].…”