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Dynamic navigation-assisted extraction of impacted maxillary anterior teeth: a model-based accuracy study.

Zi-Yu Yan1, Peng-Fei Jia1, Ao-Bo Jin1

  • 1Department of Oral and Maxillofacial Surgery, Peking University School and Hospital of Stomatology & National Center for Stomatology & National Clinical Research Center for Oral Diseases & National Engineering Research Center of Oral Biomaterials and Digital Medical Devices, No. 22, Zhongguancun South Street, Haidian District, Beijing, 100081, PR China.

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Summary

Dynamic navigation system (DNS) assisted extraction of impacted maxillary anterior teeth improves surgical accuracy. This method offers greater precision and safety compared to traditional techniques.

Keywords:
AccuracyDynamic navigationModel experimentSupernumerary tooth

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Area of Science:

  • Oral and Maxillofacial Surgery
  • Dental Technology
  • Surgical Navigation

Background:

  • Impacted tooth extraction is challenging.
  • Assessing surgical accuracy of dynamic navigation systems (DNS) for impacted maxillary anterior teeth is crucial.

Purpose of the Study:

  • To develop a model-based protocol for evaluating DNS-assisted extraction accuracy.
  • To compare the surgical precision of DNS-assisted versus conventional methods.

Main Methods:

  • A custom model simulating impacted maxillary supernumerary teeth was used.
  • Preoperative planning integrated intraoral scanning and cone-beam computed tomography (CBCT).
  • DNS guided tooth localization, osteotomy, and segmentation; outcomes measured by 3D deviations via postoperative CBCT.

Main Results:

  • The DNS group showed significantly lower RMS deviation in segmentation accuracy (0.43 ± 0.18 mm vs. 0.85 ± 0.38 mm; P = 0.02).
  • Reduced angular deviation (8.97° vs. 14.76°; P = 0.04) and curvature RMS (1.72 rad vs. 3.54 rad; P = 0.04) were observed with DNS.
  • Maximum deviation was also significantly lower in the DNS group (0.77 mm vs. 1.30 mm; P < 0.01).

Conclusions:

  • DNS-assisted extraction significantly enhances surgical accuracy for impacted maxillary anterior teeth.
  • The technique improves procedural accuracy, stability, and overall patient safety compared to conventional methods.