A prevalence study of bifid mandibular canals using cone beam computed tomography

Aim This study aims to assess the prevalence of bifid mandibular canals in a UK population using cone beam computed tomography. Materials and Methods This is a prevalence study of 140 patients (280 sides) referred to a dental hospital in the UK for extraction of a third molar. Canals were classified from cone beam computed tomography images using a novel classification. Results At least one bifid canal was seen in 30.00% (n = 42/140) of patients (95% CI: 26.13–33.87%) and in 18.93% (n = 53/280) of sides (95% CI: 16.59–21.27%). The retromolar canal was the most common variant observed. Conclusions The bifid mandibular canal appears to be a common anatomical variant, of which clinicians should be aware. These variants are relevant to surgery in the retromolar region, dental extraction and implant placement, where damage has the potential to cause bleeding and sensory disturbance.