CCSM Plate, screw, cage, or cement for the cervical spine - paradox or not?

1 . Atlanto-axial subluxation

The atlantoaxial joint
The atlantoaxial joint is the joint between the first and second cervical vertebrae in the neck, referred to as the atlas and axis, respectively. It differs from the joints between the other vertebrae in that there is no intervertebral disc present, so cervical disc herniation between C1 and C2 is not possible. Instead, the atlantoaxial junction is a true joint that is stabilized by ligaments and contains a synovial membrane and fluid. The design of this joint allows the dog’s head to move from side to side, in vertical and horizontal direction, but also allows axial rotation.

What is the cause of atlantoaxial subluxation?
Subluxation of the atlantoaxial joint occurs when the normal alignment of the first and second vertebrae in the neck is disrupted. This results in excessive movement of this joint (instability) which can cause neck pain and pressure on the nerves of the spinal cord which runs through the vertebral canal. Although an injury can result in damage to the ligaments or the vertebrae, it is more common that dogs are born with an abnormality of the second cervical vertebra (the axis) or of the ligaments, which makes the likelihood of subluxation developing greater, often as a consequence of minimal, (if any) trauma. Also the conformation of the breed (excessively large head in relation to body size) will contribute to the predisposition for atlantoaxial subluxation.  [...]