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Related Concept Videos

Tooth Anatomy01:21

Tooth Anatomy

2.8K
The human tooth enables us to eat a variety of foods, speak clearly, and even aid in shaping our faces. Teeth are composed of various elements that work together. Here's a detailed look at the anatomy of a human tooth.
The Crown, Neck, and Root
The visible part of the tooth is referred to as the crown. It's covered by enamel, the hardest substance in the human body. The crown is uniquely shaped for each type of tooth, allowing for different functions such as cutting, tearing, or...
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Virtual occlusal definition for orthognathic surgery.

X J Liu1, Q Q Li1, Z Zhang2

  • 1Department of Oral and Maxillofacial Surgery, Peking University School and Hospital of Stomatology, Beijing, China.

International Journal of Oral and Maxillofacial Surgery
|December 25, 2015
PubMed
Summary

A new virtual workflow accurately defines occlusion in orthognathic surgery. This method offers a reliable and precise alternative to traditional model surgery, improving digital surgical simulation.

Keywords:
collision detectioncomputer-assisted surgical simulationvirtual occlusal definitionvisual analytics

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Area of Science:

  • Oral and Maxillofacial Surgery
  • Digital Dentistry
  • Computer-Aided Surgery

Background:

  • Computer-assisted surgical simulation is increasingly utilized in orthognathic surgery.
  • Current occlusal definition relies on physical model surgery and subsequent digitization, which can be labor-intensive.

Purpose of the Study:

  • To develop and validate a novel software tool and workflow for virtual occlusal definition in orthognathic surgery.
  • To assess the accuracy and reproducibility of the virtual occlusal definition process.

Main Methods:

  • A new software tool and workflow were developed for virtual occlusal definition.
  • A validation study was conducted on 60 models with normal occlusion.
  • Inter- and intra-user correlation tests and error analysis were performed to compare virtual and digitized manual settings.

Main Results:

  • Inter- and intra-observer correlation coefficients for manual setting points exceeded 0.95, indicating high reproducibility.
  • The median error between virtual and gold standard positions was 1.06mm, not significantly different from 1mm.
  • No significant differences in errors were found among different teeth or between the three independent users.

Conclusions:

  • The developed workflow for virtual occlusal definition is reliable and accurate.
  • This digital approach provides a viable alternative to traditional methods for occlusal definition in orthognathic surgery.
  • The findings support the integration of virtual occlusal definition into computer-assisted surgical planning.