Characteristics of the gubernaculum tracts in mesiodens and maxillary anterior teeth with delayed eruption on MDCT and CBCT

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• 作者：Masafumi Oda ; DDS ; PhD^a ; Ikuko Nishida ; DDS ; PhD^b ; Ikuya Miyamoto ; DDS ; PhD^c ; Manabu Habu ; DDS ; PhD^d ; Daigo Yoshiga ; DDS ; PhD^d ; Masaaki Kodama ; DDS ; PhD^d ; Kenji Osawa ; DDS ; PhD^c ; Tatsurou Tanaka ; DDS ; PhD^a ; Shinji Kito ; DDS ; PhD^a ; Shinobu Matsumoto-Takeda ; DDS ; PhD^a ; Nao Wakasugi-Sato ; DDS ; PhD^a ; Shun Nishimura ; DDS^a ; Kazuhiro Tominaga ; DDS ; PhD^d ; Izumi Yoshioka ; DDS ; PhD^c ; Kenshi Maki ; DDS ; PhD^b ; Yasuhiro Morimoto ; DDS ; PhD^a ; ^e ; ^{Rad-mori@kyu-dent.ac.jp" class="auth_mail" title="E-mail the corresponding author}
• 刊名：Oral Surgery, Oral Medicine, Oral Pathology and Oral Radiology
• 出版年：2016
• 出版时间：October 2016
• 年：2016
• 卷：122
• 期：4
• 页码：511-516
• 全文大小：1166 K

文摘

To elucidate the characteristics of the gubernaculum tracts (GTs) in maxillary anterior teeth with normal or delayed eruption and in mesiodens by using multidetector computed tomography and cone beam computed tomography.

Study Design

The characteristics of GTs in maxillary anterior teeth of 205 patients with impacted mesiodens were retrospectively analyzed by using multidetector computed tomography and cone beam computed tomography. The GTs of teeth with normal or delayed eruption and the GTs of mesiodens were examined.

Results

The detection ratio of GTs in impacted mesiodens and anterior teeth with delayed eruption was significantly lower than in teeth with normal eruption. A significant difference in the angulation was found between normal and delayed eruptions. Almost all detectable GTs in the inverted mesiodens were derived from the incisive canal, while the remaining were from the alveolar crest. The connecting area of major GTs to tooth in inverted mesiodens was the cervical or root area, but in all other anterior teeth, it was the crown area.

Conclusions

GTs of inverted mesiodens may exhibit characteristics that are different from those of normal GTs when the teeth and/or the palate are developing.