'Cranial Nerves' and their Clinical Implications in Contemporary Dental Practice: A Comprehensive Review.

ABSTRACT

Cranial nerves play a pivotal role in orofacial anatomy and function, with particular relevance to dentistry due to their innervation of sensory, motor, and autonomic structures in the head and neck. Key nerves such as the trigeminal (CN V), facial (CN VII), glossopharyngeal (CN IX), vagus (CN X), and hypoglossal (CN XII) are integral to pain perception, mastication, salivation, taste, and swallowing. In general, dental procedures, these nerves are critical for effective local anesthesia (e.g., inferior alveolar nerve blocks targeting CN V), risk assessment during extractions or implants to prevent paresthesia or neuralgia, and differential diagnosis of orofacial pain mimicking odontogenic issues. In prosthodontics, their significance extends to prosthesis design and adaptation: CN V provides sensory feedback for occlusion and retention in dentures or implants, while CN VII ensures lip and cheek competence to maintain seal and esthetics; disruptions like nerve injuries can lead to instability, speech impairments, or xerostomia affecting patient outcomes. Understanding their courses and supplies enhances procedural safety, minimizes complications, and optimizes functional rehabilitation in restorative dentistry.