“Why is a ‘Bifid’ Inferior Alveolar Nerve Important to Identify in Dentistry?”

10.3.23 Quick Read #66 - #pathology #oralpathology #doctorgallagher #oralsurgery #oralsurgeon #dentist #dentistry #dental The inferior alveolar nerve (IAN) is an essential structure in dentistry and oral surgery, as it provides sensory innervation to the mandibular teeth and the lower lip. A bifid inferior alveolar nerve refers to a variation where there is a branching or duplication of the nerve within the mandible. 1.Incidence: The incidence of a bifid inferior alveolar nerve is variable and depends on the study and imaging method used. While traditional panoramic radiographs might not always detect this anatomical variation, CBCT (cone-beam computed tomography) offers more precise visualization. Studies using CBCT have reported incidences ranging from 1% to upwards of 23%, but the average is often cited between 1% and 5%. 2.Complications: •Dental Implant Surgery: A bifid IAN can pose a risk during the placement of dental implants in the posterior mandible, leading to nerve injury if not identified preoperatively. •Endodontic Procedures: During root canal treatments, especially in cases with over-instrumentation or overfilling, a bifid IAN might be inadvertently affected. •Third Molar Extractions: The removal of impacted third molars can pose a risk of nerve injury if the bifid branch is in close proximity. •Local Anesthesia: Achieving profound anesthesia might require additional injections if the bifid IAN isn’t identified, leading to inadequate pain control during dental procedures. •Orthognathic Surgery: Procedures that involve the surgical manipulation or movement of the mandible need to take into account the presence of a bifid IAN to prevent post-operative sensory complications. Considering these potential complications, it’s essential for dental professionals to be aware of the possibility of a bifid IAN and, when in doubt, use advanced imaging techniques like CBCT to get a clear view of the anatomy before embarking on surgical or complex dental procedures. References: 1. Parnia, F., Moslehifard, E., Hafezeqoran, A., Mahboub, F., & Mojaver-Kahnamoui, H. (2012). Characteristics of anatomical landmarks in the mandibular interforaminal region: A cone-beam computed tomography study. Medicine Oral, Patologia Oral y Cirugia Bucal, 17(3), e420. 2. Juodzbalys, G., Wang, H. L., & Sabalys, G. (2013). Anatomy of mandibular vital structures. Part II: Mandibular incisive canal, mental foramen and associated neurovascular bundles in relation with dental implantology. Journal of Oral & Maxillofacial Research, 4(1). 3. Bataineh, A. B., Al-Qudah, M. A., & Rawashdeh, M. A. (2005). The effect of surgical removal of third molars on the risk of injury to the inferior alveolar nerve. Journal of Oral and Maxillofacial Surgery, 63(5), 660-664. 4. ChatGPT. 2023.