Uncommon trajectory variations of the mandibular canal and of the mandibular incisive canal: case report

Abstract

The advent of CBCT in Dentistry allowed a greater accuracy in the diagnosis of anatomical variations in the jaws, preventing injury to the neurovascular bundle and enabling an adequate surgical planning in the region.

Rare case of inferior alveolar nerve buccal fenestration

“…Any complication was related with these anatomical variations. 5 Similar to our finds, was reported two clinical cases with fenestration in posterior area, both in a CBCT exam evaluation to dental implant placement. 8 One case was found in a 58-year-old woman, located in left mandibular body, while the other was in a 68-year-old man billaterally also in mandibular body.…”

“…[1][2][3] Sometimes, the mandibular canal (MC) course is close to the roots of the teeth or to the lower border of the mandible, 4 and MC anatomical or trajectory variation has been described. [3][4][5] Even though textbooks do not provide a detailed description of the MC course, it has been reported that nerve and vascular bundles may be close to the buccal cortex. It was related that 7% of the MC are in contact to mandible buccal cortex.…”

Morphological variations of the mandibular canal in digital panoramic radiographs: a retrospective study in a Chilean population

“…difficulties facing the clinician [2,6,10,13,24]. In addition, few studies focus on describing these morphological variations of the MC on different samples of populations to report interesting data like morphological configurations and its prevalence.…”

“…The mandibular canal (MC) extends bilaterally from the mandibular foramen to the mental foramen [6,12,19]. It runs longitudinally through the spongy tissue of the bone in an anteroinferior direction and describes a concave anterosuperior curve [7,18].…”

“…The MC is vulnerable in procedures like orthognathic surgery, mandibular reconstruction, extraction of third molars or installing dental implants [6], leading to complications such as neurovascular compression with swelling and/or pain [21]. Morphological variations of the MC have been described in medical literature since the 1970s [16], with case reports showing the existence of bifid MC [10,13], trifid MC [2,14] and variations such as the so-called retromolar canal [8].…”