The Journal of Advanced Prosthodontics

The Korean Academy of Prosthodonitics (대한치과보철학회)
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3-dimensional reconstruction of mandibular canal at the interforaminal region using micro-computed tomography in Korean

  • Jeon, Yong Hyun (Department of Anatomy, College of Medicine, Chosun University) ;
  • Lee, Chul Kwon (Department of Oral Anatomy, College of Dentistry, Chosun University) ;
  • Kim, Hee-Jung (Department of Dental Prosthetics, College of Dentistry, Chosun University) ;
  • Chung, Jae-Heon (Department of Dental Prosthetics, College of Dentistry, Chosun University) ;
  • Kim, Heung-Joong (Department of Oral Anatomy, College of Dentistry, Chosun University) ;
  • Yu, Sun-Kyoung (Department of Oral Anatomy, College of Dentistry, Chosun University)
  • Received : 2016.11.24
  • Accepted : 2017.07.11
  • Published : 2017.12.29
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Abstract

PURPOSE. The purpose of this study was to identify the complex course of the mandibular canal using 3D reconstruction of microCT images and to provide the diagram for clinicians to help them understand at the interforaminal region in Korean. MATERIALS AND METHODS. Twenty-six hemimandibles obtained from cadavers were examined using microCT, and the images were reconstructed. At both the midpoint of mental foramen and the tip of anterior loop, the bucco-lingual position, the height from the mandibular inferior border, the horizontal distance between two points, and position relative to tooth site on the mandibular canal were measured. The angle that the mental canal diverges from the mandibular canal was measured in posterior-superior and lateral-superior direction. RESULTS. The buccal distance from the mandibular canal was significantly much shorter than lingual distance at both the mental foramen and the tip of anterior loop. The mandibular canal at the tip of anterior loop was significantly located closer to buccal side and higher than at the mental foramen. And the mental canal most commonly diverged from the mandibular canal below the first premolar by approximately $50^{\circ}$ posterior-superior and $41^{\circ}$ lateral-superior direction, which had with a mean length of 5.19 mm in front of the mental foramen, and exited to the mental foramen below the second premolar. CONCLUSION. These results suggest that it could form a hazardous tetrahedron space at the interforaminal region, thus, the clinician need to pay attention to the width of a premolar tooth from the mental foramen during dental implant placement.

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