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Article: Volume 14 Number 4 Page 214 - October 2021

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  Orth Update 2021; 14: 214-221

Orthodontics:  Orthodontic-induced temporary sensory nerve deficit of the lower lip

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Abstract: This article presents a case of temporary right-sided numbness of the lower lip during orthodontic treatment to upright an impacted lower right second molar (LR7) in a 15-year-old male. Following cone beam computed tomography (CBCT) this was revealed to be a result of deficient bone between the roots of LR7 and close intimacy to the mandibular canal. Traction to LR7 was discontinued and the patient’s orthodontic treatment was completed uneventfully, with full recovery of normal sensation in the lower lip.

Clinical relevance: Sensory nerve symptoms initiated by orthodontic treatment are rare, and the presentations, diagnostic tools, management and outcomes of these cases have been reviewed to devise and recommend an appropriate management plan for the treating clinician.

Author notes: Matthew Chung, BDS, MFDS RCPS (Glasgow), PgCert MedEd, Former Dental Core Trainee at Liverpool University Dental Hospital. Timothy Lord, BDS, FDS RCPS (Glasgow), Consultant in Oral Surgery at the Royal Liverpool University Dental Hospital. Norah Flannigan, PhD, BDS, MOrth, MFDS RCPS, FDS(Orth), Senior Lecturer/Honorary Consultant in Orthodontics at the Royal Liverpool University Dental Hospital. Email:

Objective: To highlight that although sensory neve symptoms are a rare complication that may arise during orthodontic treatment, they should be recognized as a potential risk.