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An Analysis of Dentigerous Cysts Developed around a Mandibular Third Molar by Panoramic Radiographs

1
Department of Maxillofacial Surgery, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, 1-5-45 Yushima, Bunkyo-ku, Tokyo 113-8549, Japan
2
Center for advanced dental clinical education of Dental Hospital, Tokyo Medical and Dental University, 1-5-45 Yushima, Bunkyo-ku, Tokyo 113-8549, Japan
3
Department of Dentistry, Tokyo Yamate Medical Center, 3-22-1 Hyakunin-cho, Shinjuku-ku, Tokyo 169-0073, Japan
4
Department of Oral and Maxillofacial Surgery, Shizuoka City Hospital, 10-93 pursuer-cho, Aoi-ku, Shizuoka City, Shizuoka 420-8630, Japan
*
Author to whom correspondence should be addressed.
Dent. J. 2019, 7(1), 13; https://doi.org/10.3390/dj7010013
Received: 29 November 2018 / Revised: 31 December 2018 / Accepted: 21 January 2019 / Published: 4 February 2019
(This article belongs to the Special Issue Pathogenesis of Periodontal Disease)
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Abstract

Dentigerous cysts are one of the most prevalent types of odontogenic cysts and are associated with the crown of an unerupted tooth, especially of the mandibular third molar. In this study, the characteristics of a dentigerous cyst developed around a mandibular third molar on panoramic radiographs were investigated. The panoramic images of 257 consecutive dentigerous cyst cases associated with a mandibular third molar were analyzed. The mean age of the patients was 45.9 ± 13.3 years. The size of the cyst did not significantly correlate to the age of the patient. The unilocular type (89.1%) and the crown side type (68.5%) were significant. The associated mandibular third molars had a high frequency of class III (64.6%) and position B (48.3%) in Pell and Gregory classification and of horizontal position (36.3%) in angulation. Dentigerous cysts were thought to originate and grow commonly around deeply impacted third molars. The associated third molar with dentigerous cyst tends to have a mesial inclination. Dentigerous cysts do not appear to develop gradually after the crown formation has finished, but arise at various periods randomly. View Full-Text
Keywords: dentigerous cyst; mandibular third molar; panoramic radiograph dentigerous cyst; mandibular third molar; panoramic radiograph
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Terauchi, M.; Akiya, S.; Kumagai, J.; Ohyama, Y.; Yamaguchi, S. An Analysis of Dentigerous Cysts Developed around a Mandibular Third Molar by Panoramic Radiographs. Dent. J. 2019, 7, 13.

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