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Digital to Analog Facially Generated Interchangeable Facebow Transfer: Capturing a Standardized Reference Position.

John C Kois1,2,3, Dean E Kois2,3, Jonathan M Zeitler3

  • 1Department of Restorative Dentistry, School of Dentistry University of Washington, Seattle, WA.

Journal of Prosthodontics : Official Journal of the American College of Prosthodontists
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PubMed
Summary

Standardizing maxillary occlusal plane recording and capturing dynamic dento-facial data is challenging. This study presents techniques using natural head position and facial reference systems for accurate maxillary positioning in both analog and digital workflows.

Keywords:
Analog facebowKois facial reference glassesdigital facebownatural head positionviewing angle

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Area of Science:

  • Dentistry
  • Orthodontics
  • Dental Technology

Background:

  • Digital technology advances patient data acquisition but struggles with standardizing maxillary occlusal plane recording.
  • Capturing dynamic data for comprehensive dento-facial analysis remains a significant challenge in current dental workflows.

Purpose of the Study:

  • To describe techniques for standardizing maxillary positioning on articulators using natural head position (NHP).
  • To integrate a facial reference system (Kois Facial Reference Glasses) for both analog and digital dental workflows.
  • To present a photographic method for aligning 2D reference images with 3D digital scans and virtual articulators.

Main Methods:

  • Step-by-step techniques for positioning the maxilla on an articulator utilizing NHP and Kois Facial Reference Glasses.
  • A photographic method to capture NHP, enabling alignment of 2D reference photos with intraoral digital scans and virtual articulators.
  • Transferring additively manufactured casts in the same facial orientation for virtual or analog articulator mounting and analysis.

Main Results:

  • The described techniques allow for accurate recording and communication of maxillary arch position relative to facial references.
  • Successful transfer of maxillary casts in a consistent facial orientation for both virtual and analog analysis.
  • Standardized methodology for integrating patient-specific facial data into dental articulator setups.

Conclusions:

  • The presented techniques effectively standardize maxillary occlusal plane recording and dento-facial analysis.
  • Integration of NHP and facial reference systems enhances accuracy in both analog and digital dental workflows.
  • This approach improves communication between clinicians and technicians, leading to more precise dental restorations and analyses.