Adenocyst pliers

The utility model discloses a safety cervical trepan for a medical purpose. The edge of the lower end of a trepan pipe is provided with annular saw teeth, and the upper end of the trepan pipe is provided with a handle; the outer surface of the trepan pipe is provided with screw threads which are sheathed with a regulating nut and a locking nut, and the outer surface is also provided with scales. The handle is a butterfly-shaped handle, the quantity of the scales is two, and the scales are symmetrically distributed on the outer surface of the trepan pipe. The trepan can accurately and freely regulate the sawing depth of the trepan, well control the sawing direction and effectively prevent trepan teeth from injuring the spinal cord and the nerve root. The utility model has the characteristic of safe operation.