Vertebral Cleat Keel and Spike Design for Bone Fixation Stability

The mounting device is divided into multiple discrete spikes (typically three) that are distributed across the bone surface. Each spike independently engages with the bone, and collectively they provide a large total contact surface area. This segmentation allows the device to achieve both adequate surface area contact and stable insertion into the bone.

The spikes are designed to be partially driven into the bone during the initial implantation phase, establishing preliminary stable engagement. This partial insertion provides enough stability to hold the device in position while still allowing for adjustment. After the desired position is achieved, the spikes are fully driven in to lock the mounting in its final stable position.

The spikes are designed with non-uniform cross-sections along their length, creating varying local qualities. The peripheral surfaces are enlarged at specific locations (such as mid-sections or distal ends) to provide increased contact area with the bone at critical stress points. This local enhancement of surface area provides resistance to toggling forces while maintaining overall structural simplicity of the spike design.