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Related Experiment Video

Updated: Jun 13, 2026

Quasistatic Mechanical Testing for Computer-Aided Design and Manufacturing Occlusal Veneers Cemented to Milled Dentin Analog Material
07:42

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Published on: December 20, 2024

[Double scanning method for computer aided design and computer aided manufacture all-ceramic restorations].

Yi-Hong Liu1, Hai-Lan Feng, Hai-Tao Wang

  • 1Department of Prosthodontics, Peking University School and Hospital of Stomatology, Beijing 100081, China.

Zhonghua Kou Qiang Yi Xue Za Zhi = Zhonghua Kouqiang Yixue Zazhi = Chinese Journal of Stomatology
|May 11, 2010
PubMed
Summary

Double scanning effectively produces complex CAD-CAM zirconia crowns. Contact scanners, like Procera, were found easier for creating intricate zirconia copings compared to optical scanners, such as Everest.

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Area of Science:

  • Dental materials science
  • Biomaterials engineering
  • Digital dentistry

Context:

  • Computer-aided design and computer-aided manufacture (CAD-CAM) systems are increasingly used for dental restorations.
  • Zirconia is a popular material for crowns due to its strength and aesthetics.
  • Producing complex zirconia copings presents manufacturing challenges.

Purpose:

  • To introduce and evaluate the double scanning technique for CAD-CAM zirconia crown production.
  • To compare the clinical performance of Procera and Everest CAD-CAM systems.
  • To assess the ease of fabricating complex zirconia copings using different scanning methods.

Summary:

  • Forty CAD-CAM zirconia crowns (10 Procera, 30 Everest) were fabricated using double scanning and clinically evaluated over 6-24 months.
  • Evaluation criteria included marginal fit, aesthetics, gingival health, retention, and fracture.
  • All restorations demonstrated acceptable clinical outcomes.

Impact:

  • Double scanning facilitates the production of complex zirconia copings with symmetrical porcelain length.
  • Contact scanners (Procera) offer an advantage over optical scanners (Everest) for fabricating intricate zirconia copings.
  • This technique enhances the CAD-CAM manufacturing of advanced zirconia dental restorations.