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Related Experiment Video

Updated: Oct 21, 2025

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

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Performance of PEEK based telescopic crowns, a comparative study.

Matthias Priester1, Wolf-Dieter Müller2, Florian Beuer2

  • 1Dental-Labor Werth & Priester Kassel GmbH & Co KG, Ludwigstr. 6 + 10, 34127 Kassel, Germany.

Dental Materials : Official Publication of the Academy of Dental Materials
|September 4, 2021
PubMed
Summary

Polyetheretherketone (PEEK) telescopic crowns demonstrate comparable performance to traditional metal and zirconia pairings. Long-term testing shows PEEK + PEEK crowns maintain retention force, offering enhanced security for partial dentures.

Keywords:
Cobalt-chromium alloyPEEKTelescopic crownsZirconium dioxide

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Area of Science:

  • Biomaterials science
  • Dental materials
  • Prosthodontics

Background:

  • Telescopic crowns anchor partial dentures, traditionally made from alloys prone to corrosion.
  • Zirconia ceramics offer a metal-free alternative, reducing corrosion.
  • High-performance polymers like polyetheretherketone (PEEK) present a novel, metal-free option for telescopic crowns.

Purpose of the Study:

  • To evaluate the performance of PEEK telescopic crowns.
  • To compare PEEK + PEEK crown pairings with ZrO2 + PEEK and CoCr-alloy + PEEK pairings.
  • To assess retention force, wear comfort, and long-term stability.

Main Methods:

  • CAD/CAM fabrication of telescopic crowns using PEEK, ZrO2, and CoCr-alloy.
  • Measurement of maximum retention force and retention force vs. pull-off distance.
  • Testing under varying pull-off speeds and crown configurations (1C, 2C, 3C).
  • Simulated long-term behavior assessment over 10,000 cycles.

Main Results:

  • PEEK + PEEK crowns exhibited higher maximum retention force than other pairings.
  • Pull-off speed between 1-10 mm/min did not significantly influence retention force.
  • Friction force decreased with fewer crowns but remained constant after 10,000 cycles.

Conclusions:

  • PEEK + PEEK telescopic crowns perform comparably to conventional materials.
  • PEEK + PEEK offers improved security against retention loss during dental procedures.
  • Long-term use shows no degradation in retention force for PEEK + PEEK crowns.