Spring-assisted cranial clamp

A cranial clamp for attaching a cranial flap to the skull, the cranial clamp comprising:

• a cap having an upper face and a lower face,
• the upper face including a conically-shaped central recess, having an outer mouth and an inner end disposed coaxially to a central unthreaded aperture, the outer mouth being wider than the inner end,
• the lower face including a plurality of radial teeth;
• an extension spring having a distal end and a proximal end,
• the distal end of the extension spring extending through the central unthreaded aperture;
• a locking member having an inner face, an outer face opposed to the inner face, and a threaded face adjacent to both the inner face and the outer face,
• the inner face being flat,
• the outer face including socket adapted to engage a fastening tool,
• the threaded face of the locking member engaging the conically-shaped central recess of the cap and the extension spring to secure the extension spring to the cap;
• and
• a base, the base being secured to the proximal end of the extension spring.