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Related Experiment Videos

Tooth surface fitting and three-dimensional display using hidden surface removal technique.

Y C Pao1, P Y Qin, Q S Yuan

  • 1Department of Engineering Mechanics, University of Nebraska, Lincoln 68588-0347.

Computers and Biomedical Research, an International Journal
|December 1, 1990
PubMed
Summary
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Bi-cubic parametric spline surfaces accurately fit tooth external and canal shapes using X-ray data. This method enables efficient 3D tooth surface visualization by optimizing hidden surface removal for faster computation.

Area of Science:

  • Biomedical Engineering
  • Computer Graphics
  • Dental Anatomy

Background:

  • Accurate 3D modeling of dental structures is crucial for diagnosis and treatment planning.
  • Existing surface-fitting methods may lack precision or computational efficiency for complex tooth geometries.

Purpose of the Study:

  • To develop and evaluate a bi-cubic parametric spline surface-fitting technique for dental external and canal surfaces.
  • To implement an efficient hidden surface removal algorithm for improved 3D visualization of fitted tooth surfaces.

Main Methods:

  • Utilized crown-to-root and cross-sectional data obtained from X-ray scanning.
  • Applied bi-cubic parametric spline interpolation for surface fitting.
  • Developed a novel hidden surface removal technique based on discriminating removal grades for computational efficiency.

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Main Results:

  • The bi-cubic parametric spline method successfully fitted complex tooth external and canal surfaces.
  • The selection of accumulated chord length or coordinate component as parameters allowed for smooth surface fitting.
  • The developed hidden surface removal technique significantly reduced computing time for 3D display.

Conclusions:

  • Bi-cubic parametric spline surfaces provide a robust method for accurate dental surface modeling.
  • The efficient hidden surface removal algorithm enhances the practical application of 3D dental visualization.
  • This approach offers a valuable tool for digital dentistry and research.