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- Title
Assessment of maxillary third molars with panoramic radiography and cone-beam computed tomography.
- Authors
Yun-Hoa Jung; Bong-Hae Cho
- Abstract
radiography and cone-beam computed tomography (CBCT) Materials and Methods: A total of 395 maxillary third molars in 234 patients were examined using panoramic radiographs and CBCT images. We examined the eruption level of the maxillary third molars, the available retromolar space, the angulation, the relationship to the second molars, the number of roots, and the relationship between the roots and the sinus. Results: Females had a higher frequency of maxillary third molars with occlusal planes apical to the cervical line of the second molar (Level C) than males. All third molars with insufficient retromolar space were Level C. The most common angulation was vertical, followed by buccoangular. Almost all of the Level C molars were in contact with the roots of the second molar. Erupted teeth most commonly had three roots, and completely impacted teeth most commonly had one root. The superimposition of one third of the root and the sinus floor was most commonly associated with the sinus floor being located on the buccal side of the root. Conclusion: Eruption levels were differently distributed according to gender. A statistically significant association was found between the eruption level and the available retromolar space. When panoramic radiographs showed a superimposition of the roots and the sinus floor, expansion of the sinus to the buccal side of the root was generally observed in CBCT images.
- Subjects
THIRD molars; PANORAMIC radiography; CONE beam computed tomography; TOOTH eruption; TOOTH roots; MAXILLARY sinus
- Publication
Imaging Science in Dentistry, 2015, Vol 45, Issue 4, p233
- ISSN
2233-7822
- Publication type
Article
- DOI
10.5624/isd.2015.45.4.233