The invention described includes an osteoendoscopic cylinder for tamponading bleeding along a longitudinal canal surface of an osteocentral canal of a femoral neck so as to allow endoscopic visualization of a segment of osteonecrotic bone within a femoral head. The osteoendoscopic cylinder is of a dimension adapted to receive an endoscope therein and includes an inner visual surface and an outer bony contact surface. An orientation mark along the inner visual surface is of a size and dimension to ensure a first visualization thereof with the endoscope. The first visualization is of an effect to allow spatial orientation of the endoscope within the femoral head. A side opening proximally situated thereabout a proximal handle end is of a size and dimension adapted to mount a vacuum apparatus comprising of a transparent tube.