Axis (C2) vs Mandible
| Property | Axis (C2) | Mandible |
|---|---|---|
| Latin Name | Axis | Os mandibulae |
| Type | Bone | Bone |
| Body System | Skeletal | Skeletal |
| Body Region | Spine | Face |
| Function | The second cervical vertebra that provides a pivot point for rotation of the head. The dens (odontoid process) projects superiorly and acts as the axis around which the atlas rotates. | The only movable bone of the skull, forming the lower jaw. Essential for mastication (chewing), speech articulation, and maintaining the lower dental arch. |
| Clinical Significance | Odontoid fractures are common cervical spine injuries, especially in elderly patients. Hangman's fracture involves bilateral pars interarticularis fractures of C2. Atlantoaxial instability occurs in rheumatoid arthritis and Down syndrome. | Mandibular fractures are the second most common facial fractures. The inferior alveolar nerve runs through the mandibular canal and can be damaged during wisdom tooth extraction. Temporomandibular joint disorders cause … |
| FMA ID | 12520 | 52748 |