Рентгенология & Радиология, 2017, LVI 108-113

Three-dimensional cone-beam computed tomography: A new approach to the diagnosis and treatment planning of impacted mandibular third molars

  1. Kanazirska, G. Yordanov, I. Angelova, N. Kanazirski

Abstract.

Cone Beam Computed Tomography (CBCT) is a relatively new method in dental practice which raises a more precise diagnosis and correct treatment plan. The image of the impacteed teeth and surrounding structures with CBCT, are with better quality and informativity than the conventional imaging-diagnostic methods . The use of CBCT to determine the ratio of the impacteed teeth to the mandibular canal is necessary for the prevention of complications associated with iatrogenic trauma to the vascular- nerve bundle. The aim of this study was to determine the anatomic relationship between the roots of impacted third molars and mandibular canal using CBCT imaging. The studied patients with impacted third molars of the mandible are 127, aged 17 through 60.They were examined with Cone-beam Computed Tomography (CBCT). From the 195 impacted third molar with the – higher frequency are those in which the channel is below their roots-107 teeth (54.9%). The second frequency are the teeth where the channel is located lingually-57 (29.2%). Follow the teeth, in which the channel has a buccal location-25 (12.8%). With the lowest frequency are cases in which the mandibular canal is between the roots of impacted teeth-6 teeth (3.1%).At 132 teeth (67.7%) mandibular canal is at a distance of 1 mm. A 63 teeth (32.3%) the channel is at a distance of over 1 mm. The high resolution cuts in different planes and threedimensional reconstructions made substantially as set forth preferred for different specialists in dentistry. Precise measurements of the bone around the mandibular canal prevent damage to neurovascular bundle. This makes the method preferred for planning appropriate treatment.

Key words: CONE BEAM COMPUTED TOMOGRAPHY. IMPACTED THIRD MOLARS. MANDIBULAR CANA