Journal of the Korean Association of Oral and Maxillofacial Surgeons

  • 제40권6호
  • /
  • Pages.278-284
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  • 2014
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  • 2234-7550(pISSN)
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  • 2234-5930(eISSN)
대한구강악안면외과학회 (The Korean Association of Oral and Maxillofacial Surgeons)
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Analysis and evaluation of relative positions of mandibular third molar and mandibular canal impacts

  • Kim, Hang-Gul (Department of Oral and Maxillofacial Surgery, College of Dentistry, Dankook University) ;
  • Lee, Jae-Hoon (Department of Oral and Maxillofacial Surgery, College of Dentistry, Dankook University)
  • 투고 : 2014.07.29
  • 심사 : 2014.09.10
  • 발행 : 2014.12.31
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초록

Objectives: This study used cone-beam computed tomography (CBCT) images to categorize the relationships between the mandibular canal and the roots and investigated the prevalence of nerve damage. Materials and Methods: Through CBCT images, contact and three-dimensional positional relationships between the roots of the mandibular third molar and the mandibular canal were investigated. With this data, prevalence of nerve damage according to the presence of contact and three-dimensional positional relationships was studied. Other factors that affected the prevalence of nerve damage were also investigated. Results: When the mandibular third molar and the mandibular canal were shown to have direct contact in CBCT images, the prevalence of nerve damage was higher than in other cases. Also, in cases where the mandibular canal was horizontally lingual to the mandibular third molar and the mandibular canal was vertically at the cervical level of the mandibular third molar, the prevalence of nerve damage was higher than in opposite cases. The percentage of mandibular canal contact with the roots of the mandibular third molar was higher when the mandibular canal was horizontally lingual to the mandibular third molar. Finally, the prevalence of nerve damage was higher when the diameter of the mandibular canal lumen suddenly decreased at the contact area between the mandibular canal and the roots, as shown in CBCT images. Conclusion: The three-dimensional relationship of the mandibular third molar and the mandibular canal can help predict nerve damage and can guide patient expectations of the possibility and extent of nerve damage.

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참고문헌

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피인용 문헌

  1. Inferior alveolar nerve injury: Correlation between indicators of risk on panoramic radiographs and the incidence of tooth and mandibular canal contact on cone‐beam computed tomography scans in vol.9, pp.3, 2014, https://doi.org/10.1111/jicd.12323
  2. Can narrowing of the mandibular canal on pre-operative panoramic radiography predict close anatomical contact of the mandibular canal with the mandibular third molar? A meta-analysis vol.36, pp.2, 2014, https://doi.org/10.1007/s11282-019-00375-4
  3. Preoperative Anatomic Evaluation of the Relationship Between Inferior Alveolar Nerve Canal and Impacted Mandibular Third Molar in a Population of Bhubaneswar, Odisha, Using CBCT: A Hospital-Based Stud vol.19, pp.2, 2020, https://doi.org/10.1007/s12663-019-01193-1
  4. Comprehensive review of lower third molar management: A guide for improved informed consent vol.34, pp.2, 2014, https://doi.org/10.1002/ca.23693