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Related Experiment Video

Updated: May 14, 2026

Digital Hybrid Model Preparation for Virtual Planning of Reconstructive Dentoalveolar Surgical Procedures
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3D imaging reconstruction and impacted third molars: case reports.

Andrea Tuzi1, Roberto Di Bari, Andrea Cicconetti

  • 1Department of Oral and Maxillofacial Sciences, School of Dentistry, Sapienza University of Rome, Italy.

Annali Di Stomatologia
|February 7, 2013
PubMed
Summary

Computed Tomography (CT) aids in evaluating third molar proximity to the inferior alveolar nerve, potentially preventing nerve injury. While not always essential, 3D reconstructions offer valuable assistance in complex surgical cases.

Keywords:
3D reconstruction3M third molarCBCT Cone-Beam Computed TomographyDICOM imageDental CT ScanIAN Inferior Alveolar Nerve

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Area of Science:

  • Dentistry
  • Oral Surgery
  • Radiology

Background:

  • Debate exists regarding the necessity of Computed Tomography (CT) for third molar extraction planning, even with positive radiographic signs.
  • Proximity of third molars to the inferior alveolar nerve (IAN) poses a risk of post-operative neuro-sensitive alterations.
  • IAN injury is a serious, infrequent complication of third molar surgery, necessitating careful pre-operative evaluation.

Purpose of the Study:

  • To present two case reports illustrating positive radiographic signs indicative of a close relationship between third molars and the IAN.
  • To define the anatomical relationship between third molars and the mandibular canal using Dental CT Scan, DICOM acquisition, and 3D reconstruction.

Main Methods:

  • Review of two clinical cases with radiographic signs suggesting close IAN-third molar proximity.
  • Utilization of Dental CT Scan for DICOM image acquisition.
  • Employing dedicated software for 3D reconstruction to visualize the mandibular canal and third molar relationship.

Main Results:

  • Radiographic signs confirmed a potentially close relationship between the third molars and the inferior alveolar nerve in the presented cases.
  • Dental CT Scan and 3D reconstruction provided detailed visualization of the anatomical relationship.

Conclusions:

  • While 3D images from CT scans are not indispensable for all third molar surgeries, they offer significant assistance in complex cases.
  • Pre-operative imaging, including advanced techniques like 3D CT, is crucial for assessing the risk of IAN injury during third molar extraction.