INBDE (Integrated National Board Dental Examination) Practice Exam 2026 - Free Practice Questions and Study Guide

The joint that is present with C1 is the atlanto-occipital joint. This joint is formed between the atlas (C1 vertebra) and the occipital bone at the base of the skull. It allows for flexion and extension of the head, enabling nodding movements.

The other options are incorrect because:

- The atlantoaxial joint (Option B) is the joint between the atlas (C1) and the axis (C2) vertebrae, allowing for rotation of the head.

- The sacroiliac joint (Option C) is formed between the sacrum and the ilium of the pelvis, not associated with C1.

- The sternoclavicular joint (Option D) is the joint where the clavicle meets the sternum, also not associated with C1.