Oblique Plane Cutting of Cone Beam Computed Tomography Analysis on the Safe Zone for Micro-Implants of Maxillary Molar Region

Oblique Plane Cutting of Cone Beam Computed Tomography Analysis on the Safe Zone for Micro-Implants of Maxillary Molar Region: Objective:

To explore the safe zone for micro-implants of the maxillary molar region by oblique plane cutting mode of cone beam computed tomography (CBCT).

Methods:

Thirty-nine patients with orthodontic alignment were enrolled with CBCT. In this study, the areas between the maxillary second premolar and the first molar were analyzed by the image reconstruction with CS 3D Imaging Software. The alveolar ridge bone width and the minimum interradicular space were measured at the height of 8, 10, and 12 mm from archwire under the 2 cutting modes of the oblique plane and coronal plane, respectively. The statistical analysis was performed.

Results:

The bone widths of alveolar ridge between the maxillary second premolar and the first molar were statistically significant under the 2 cutting modes of the oblique plane and coronal plane. The bone width was gradually decreased to the cranial side with the fixed measurement point and the interradicular space was gradually increased. The differences were statistically significant.

Conclusion:

The oblique plane cutting of CBCT is more representative of the alveolar bone than the coronal plane. There is sufficient safe zone between the maxillary second premolar and the first molar for most patients to implant the micro-implants. However, the individual differences present large and CBCT needs to be taken before the implantation.

Address correspondence and reprint requests to Jun Wu, PhD, Department of Orthodontics, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai Key Laboratory of Stomatology, 639 Zhi-Zao-Ju Road, Shanghai 200011, China; E-mail: drwujun@163.com

Received 17 August, 2019

Accepted 5 September, 2019

QY and JW contributed equally to this work and share senior authorship.

The authors have no conflicts of interest to disclose.

Supplemental digital contents are available for this article. Direct URL citations appear in the printed text and are provided in the HTML and PDF versions of this article on the journal's Web site (www.jcraniofacialsurgery.com).

© 2019 by Mutaz B. Habal, MD.