A surgical device having a blade head with an inner surface facing an underside of vertebra. The device includes a first bend connecting a neck member to the blade head. The first bend includes a curvature that befits a geometry of the underside of the vertebra adjacent to an exposed area of a spinal canal. The curvature is measured between the blade head and the neck member. Moreover, the blade head includes a blade edge lengthwise. The blade head further includes a dull tip. The device also includes a stem connecting to the neck member.