Skip to main page content
U.S. flag

An official website of the United States government

Dot gov

The .gov means it’s official.
Federal government websites often end in .gov or .mil. Before sharing sensitive information, make sure you’re on a federal government site.

Https

The site is secure.
The https:// ensures that you are connecting to the official website and that any information you provide is encrypted and transmitted securely.

Access keys NCBI Homepage MyNCBI Homepage Main Content Main Navigation
Comparative Study
. 2023 Jan 3;9(1):1.
doi: 10.1186/s40729-022-00466-8.

Evaluation of the contour of edentulous jaw sections in the transversal plane and the buccolingual vertical-level disparity in CBCT and panoramic radiography images: a retrospective comparative study

Ali Reza Ketabi  1   2 , Andree Piwowarczyk  3 , Matthias Christian Schulz  4 , Hans-Christoph Lauer  5 , Stefan Hassfeld  6
Affiliations
Comparative Study

Evaluation of the contour of edentulous jaw sections in the transversal plane and the buccolingual vertical-level disparity in CBCT and panoramic radiography images: a retrospective comparative study

Ali Reza Ketabi et al. Int J Implant Dent. .

Abstract

Purpose: This study investigates whether edentulous jaw sections in the planned implant position exhibit jaw contours funnel-shaped or exhibit pronounced retraction of the jaw (unusual jaw contours) in the transversal plane of the three-dimensional (3D) images, not visible in two-dimensional (2D) images.

Methods: A total of 335 patients with an edentulous section of the jaw that required dental implants were selected. Anonymised radiologic patients' data were collected, comprising cone-beam computed tomography (CBCT) images of the edentulous jaw sections. In the first stage, unusual jaw contours were examined, including funnel-shaped or pronounced retraction of the jaw and hypodense regions with an undercut and/or bone deficit. In the second stage, the variation in the height of the alveolar ridge between the lingual and buccal contour in the edentulous jaw sections was assessed.

Results: The CBCT images of an unusual jaw contour were observed in 8 cases (2.4%) in the maxilla on the left and 10 cases (3%) in the maxilla on the right. In the mandible, a jaw contour deviates in 39 cases (12.1%) on the left side and 39 cases (12.1%) on the right side. A height difference was detected in the upper jaw in 307 cases and the lower jaw in 265 cases. The discrepancy was 2.09 mm (± 2.25 mm) in the maxilla and 3.97 mm (± 3.45 mm) in the mandible.

Conclusions: The CBCT scan provides useful information to avoid complications in the preoperative planning phase and surgical planning in implant dentistry.

Keywords: Alveolar ridge contour; Available bone width; Cone-beam computed tomography; Dental implant; Diagnosis/clinical assessment; Lingual undercuts; Submandibular fossa.

PubMed Disclaimer

Conflict of interest statement

Ali Reza Ketabi, Andree Piwowarczyk, Matthias C. Schulz, Hans-Christoph Lauer and Stefan Hassfeld hereby declare that they have no conflict of interests.

Figures

Fig. 1
Fig. 1
A Initial panoramic radiography of the left mandible; B the determination of the planned implants in regions 34–37 using an orientation template
Fig. 2
Fig. 2
The same patient’s (Fig. 1) CBCT with the virtually planned implant in region 37 showed inconspicuous jaw contour
Fig. 3
Fig. 3
CBCT with virtually planned implant planning in region 35 showing a funnel-shaped contour of the jaw and a pronounced retraction of the jaw contour from the lingual side. The funnel-shaped jaw contour is invisible in the panoramic radiography. Perforation of the jaw can be prevented through CBCT images
Fig. 4
Fig. 4
Panoramic radiography image showing A a distinct hypodense lesion and B a translucent area. The depiction of the same region in CBCT (C)
Fig. 5
Fig. 5
CBCT coronally slice: A and B lingual and buccal lines parallel to the implant axis, C and D lines perpendicular to A and B in order to determine the vertical distance (VD), K jawbone, I of the virtually planned implant
Fig. 6
Fig. 6
Frequency distribution of the height discrepancy of the maxilla calculated in 1-mm steps
Fig. 7
Fig. 7
Frequency distribution of the height discrepancy of the mandible calculated in 1-mm steps
See this image and copyright information in PMC

Similar articles

See all similar articles

Cited by

References

    1. Jacobs R, Salmon B, Codari M, Hassan B, Bornstein MM. Cone beam computed tomography in implant dentistry: recommendations for clinical use. BMC Oral Health. 2018;18(1):88. doi: 10.1186/s12903-018-0523-5. - DOI - PMC - PubMed
    1. Mozzo P, Procacci C, Tacconi A, Tinazzi Martini P, Bergamo Andreis IA. A new volumetric CT machine for dental imaging based on the cone-beam technique: preliminary results. Eur Radiol. 1998;8:1558–1564. doi: 10.1007/s003300050586. - DOI - PubMed
    1. Wang M, Sun Y, Yu Y, Ding X. Evaluation of palatal bone thickness for insertion of orthodontic mini-implants in adults and adolescents. J Craniofac Surg. 2017;28(6):1468–1471. doi: 10.1097/SCS.0000000000003906. - DOI - PubMed
    1. Kapila SD, Nervina JM. CBCT in orthodontics: assessment of treatment outcomes and indications for its use. Dentomaxillofac Radiol. 2015;44:20140282. doi: 10.1259/dmfr.20140282. - DOI - PMC - PubMed
    1. Lai CS, Bornstein MM, Mock L, Heuberger BM, Dietrich T, Katsaros C. Impacted maxillary canines and root resorptions of neighbouring teeth: a radiographic analysis using cone-beam computed tomography (CBCT) Eur J Orthod. 2013;35:529–538. doi: 10.1093/ejo/cjs037. - DOI - PubMed

Publication types

MeSH terms

Substances

LinkOut - more resources