Expanding and shaping device for cervical spinal canal and mounting device

An expanding and shaping device for a cervical spinal canal, configured to expand, shape, and fix a vertebral plate and a lateral mass formed by incising the cervical spinal canal, and a vertical incision is formed between the vertebral plate and the lateral mass, wherein the expanding and shaping device for cervical spinal canal comprises:

• a first fixing part;
• a second fixing part;
• and
• fasteners,
• wherein the first fixing part is hinged to the second fixing part, wherein the first fixing part can be attached to a side wall of the vertebral plate, and the second fixing part is configured to be attached to a side surface of the lateral mass towards the vertebral plate,
• wherein a first fixing hole is arranged on the first fixing part, and the fasteners are configured to pass through the first fixing hole to connect the vertebral plate, and a passing-through direction of the fasteners is consistent with a direction of the incision;
• and a second fixing hole is arranged on the second fixing part, wherein the fasteners are configured to pass through the second fixing hole to connect the lateral mass,
• wherein the first fixing part comprises a fixing member and an extension member, wherein the fixing member is fixedly connected to the extension member, the fixing member is provided with an inclined concave surface;
• the fixing member is configured to be attached to a side wall of the vertebral plate by the inclined concave surface;
• and
• one side of the fixing member away from the inclined concave surface is arranged in a horizontal plane, wherein the first fixing hole passes vertically through the horizontal plane, and the fasteners can pass through the inclined concave surface from the horizontal plane so that the fasteners are configured to be tightly connected to the vertebral plate, and
• the extension member is arranged parallel to the incision so that the extension member can extend along a surface of the incision,
• wherein the second fixing part comprises a hinge member and a positioning member, wherein the hinge member is connected to the positioning member, and the hinge member is provided with a rotating shaft, wherein the extension member is rotationally connected to the hinge member by the rotating shaft so that the first fixing part and the second fixing part are in a folded state or an unfolded state,
• the positioning member is configured to be attached to a surface of the lateral mass,
• the second fixing hole passes through the positioning member;
• and the fasteners are configured to be connected to the lateral mass by the second fixing hole to fix the positioning member on the lateral mass,
• wherein the positioning member is provided with a step, and the positioning member is configured to abut against one side of the lateral mass provided with the incision by the step so as to be positioned for fixation, and
• wherein one side of the positioning member away from the step is provided with a first inclined surface, and one end of the extension member away from the fixing member is provided with a second inclined surface, wherein in the unfolded state, the extension member abuts and is limited by the first inclined surface of the positioning member by the second inclined surface, so as to limit the extension member to be in planar contact with the incision of the vertebral plate by the positioning member.