A Hoen Dural Separator, 90° is a specialized surgical instrument primarily used in neurosurgery and otologic procedures. It is designed to gently separate delicate tissues, such as the dura mater (the outermost layer covering the brain and spinal cord) from adjacent structures, without causing damage. The 90° angle of the tool allows for better access and control in tight or confined areas, which is especially important in surgeries involving the skull, middle ear, or the base of the brain.