A cone-beam computed tomographic assessment of the proximity of the maxillary canine and posterior teeth to the maxillary sinus floor: Lessons from 4778 roots.

Abstract

INTRODUCTION:

When tooth roots protrude into the maxillary sinus, apical root resorption and tipping may occur during horizontal tooth movement across the sinus floor. Three-dimensional cone-beam computed tomography (CBCT) images may provide detailed information without distortion and overlap. We evaluated the relationships between the maxillary tooth root apices and the maxillary sinus floor using CBCT.

METHODS:

We evaluated 4778 roots from 76 men (aged 27.6 ± 10.4 [mean ± standard deviation] years; range, 18-69 years), and 225 women (aged 30.4 ± 12.0 years; range, 18-68 years). The positional relationships between the maxillary tooth root apices, including the canine, premolar (first and/or second), and molar (first and/or second), and the inferior wall of the maxillary sinus were comprehensively evaluated on 2 cross-sectional CBCT images (ie, the sagittal and coronal planes). These distances were measured in both images simultaneously.

RESULTS:

The sagittal plane distances were significantly larger than coronal plane distances, except for the distobuccal root of the first molar. Pearson correlation test revealed a significant negative correlation between the distance and the patient's age.

CONCLUSIONS:

Our study provides valuable information for planning orthodontic tooth movement through the maxillary sinus, which may help to predict the occurrence and severity of root resorption.

• Authors: Shuji Oishi, Yuji Ishida, Tomonari Matsumura, Soma Kita, Tomomi Sakaguchi-Kuma, Toshihiro Imamura, Yuhei Ikeda, Ayako Kawabe, Makiko Okuzawa, Takashi Ono
• Journal: American journal of orthodontics and dentofacial orthopedics : official publication of the American Association of Orthodontists, its constituent societies, and the American Board of Orthodontics (Am J Orthod Dentofacial Orthop) Vol. 157 Issue 6 Pg. 792-802 (Jun 2020) ISSN: 1097-6752 [Electronic] United States
• PMID: 32487309 (Publication Type: Journal Article)
• Copyright: Copyright © 2020 American Association of Orthodontists. Published by Elsevier Inc. All rights reserved.

Topics

• Adolescent
• Adult
• Aged
• Cone-Beam Computed Tomography
• Cross-Sectional Studies
• Female
• Humans
• Male
• Maxilla
• Maxillary Sinus
• Middle Aged
• Sinus Floor Augmentation
• Tooth Root
• Young Adult