Author/Authors :
Shamloo، Nafiseh نويسنده Department of Oral and Maxillofacial Pathology , , Safi، Yaser نويسنده Department of Oral and Maxillofacial Radiology, Dental School, Shahid Beheshti University of Medical Sciences, Tehran, Iran , , Fathpour، Kamyar نويسنده Dental Material Research Center and Department of Restorative Dentistry , , Yaghmaei، Masood نويسنده Department of Oral and Maxillofacial Surgery, School of Dentistry , , Bahemmat ، Nika نويسنده Post graduate Student, Oral & Maxillofacial Radiology, Shahid Beheshti University of Medical Sciences, Tehran-Iran ,
Abstract :
Mandibular canal is the most important anatomical landmark in the body of mandible which always
must be considered for implant surgery in posterior mandibular region. Damage to vessels and inferior
alveolar nerve that passes through the mandibular canal can cause problems such as hemorrhage
and neurosensory disturbances. Damage to the mandibular canal can occur during implant surgery.
Depending on the severity of injuries, it would result in temporary or permanent neurosensory
disturbances. We have reported a case that mandibular canal narrowing occurred following implant
surgery and resulted in anesthetic and hypoesthetic areas in the lower lip. Patient had a history of
implant surgery in the region of teeth numbered 30 and numbered 31. The inserted implant failed
after 6 years, and reimplantation was done in this area, but due to lower lip numbness in the right
side, the second implant was removed, and another implant was inserted in the region of the tooth
numbered 32. After 2 years, right lower lip numbness was reported again by the patient. Cone beam
computed tomography images showed canal narrowing in the region of the tooth numbered 31
where the second implant was inserted. It seems that the main cause for anesthesia and hypoesthesia
in this patient is canal narrowing due to damage during implant replacement and removal.
