Countersinking in diaphyseal bone
There are two important reasons for countersinking:
- The risk of soft-tissue irritation is greatly reduced by ensuring that the
the screw head protrudes only minimally from the bone surface.
- Countersinking ensures that the screw head has a maximal contact area with
the bone, distributing the forces from the screw head more widely and more
biodynamically than an unsunk head.