- 作者：Thomas von Arx&lowast ; ; thomas.vonarx@zmk.unibe.ch" class="auth_mail" title="E-mail the corresponding author (Prof Dr med dent) ; Monika Friedli&lowast ; (Dr med dent) ; Pedram Sendi ; PD&dagger ; (Dr med ; Dr med dent) ; Scott Lozanoff ; PhD&Dagger ; ; Michael M. Bornstein ; PD&lowast ; (Dr med dent)
- 关键词：CBCT ; cone beam computed tomography ; mandibular anatomy ; mental canal ; mental foramen ; radiographic analysis
- 刊名：Journal of Endodontics
- 出版年：2013
- 出版时间：December 2013
- 年：2013
- 卷：39
- 期：12
- 页码：1522-1528
- 全文大小：690 K
Methods
Sagittal, axial, and coronal CBCT images of 142 patients (26 bilateral and 116 unilateral cases) were retrospectively screened to determine the location of the MF with respect to adjacent teeth and to take linear measurements of the size of the MF and its distances to the upper and lower borders of the mandible. In addition, the course and angulation of the mental canal exiting the MF were assessed.
Results
The majority of MF (56%) were located apically between the 2 premolars, and another 35.7% of MF were positioned below the second premolar. On average, the MF was localized 5.0 mm from the closest root of the adjacent tooth (range, 0.3–9.8 mm). The mean size of the MF showed a height of 3.0 mm and a length of 3.2 mm; however, individual cases showed large differences in height (1.8–5.1 mm) and in length (1.8–5.5 mm). All mental canals exiting the MF demonstrated an upward course in the coronal plane, with 70.1% of the mental canal presenting an anterior loop (AL) in the axial view. The mean extension of AL in cases with an AL was 2.3 mm.
Conclusions
This study is consistent with previous radiographic studies regarding size and location of MF and distances between MF and adjacent anatomic structures. The assessed bilateral cases showed a high intraindividual concordance for certain features when comparing right and left sides.