Final answer:
In a routine full-mouth survey used in dental imaging, it is not possible to see the temporomandibular joint (TMJ). While other structures in the mouth can be visualized, the TMJ, responsible for the jaw's various movements, is not depicted due to its specific location and the imaging technique utilized (option d).
Step-by-step explanation:
In a routine full-mouth survey, it is not possible to see the temporomandibular joint (TMJ). The TMJ is the joint that facilitates various motions of the lower jaw, including opening (mandibular depression) and closing (mandibular elevation), as well as side-to-side and protraction/retraction movements. While the sinuses, hard palate, and mandibular canal may be visualized in a full-mouth survey, the TMJ is not typically included within the scope of these images due to its location and the type of imaging used.
The TMJ consists of the articulation between the mandibular fossa and articular tubercle of the temporal bone, and the condyle of the mandible, with an articular disc situated between these bones. This complex joint allows for the essential motions required for chewing and speaking. When a full-mouth survey is conducted, the focus is usually on the teeth and surrounding bone structure, not on the joints of the jaw.
Hence, the answer is option d.