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March 6, 2026ProsthesisOpen Access

Er:YAG Laser Removal of Implant-Supported Digitally Manufactured Single Crowns Made of Lithium Disilicate: Influence of Crown Spacer and Abutment Taper

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Authors

SBSarah M. BlenderSTSimon TilsnerLZLuisa Zeh

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Overview

Study investigates laser removal efficiency of ceramic crowns, indicating beneficial taper and spacer designs for reuse.

Key Points

  • This research aims to assess the efficiency of Er:YAG laser for removing lithium disilicate crowns and their potential for reuse.
  • Tested 60 lithium disilicate crowns bonded to titanium abutments with various spacer settings and abutment tapers.
  • Classified crowns based on spacer sizes (90 µm, 120 µm, 150 µm) and abutment tapers (4°, 6°).
  • Recorded laser pulses and removal time post-storage in distilled water.
  • Evaluated fracture patterns microscopically and macroscopically using a fluorescent method.
  • All crowns were successfully removed using the laser.
  • Crowns with a 6° taper and 150 µm spacer required significantly fewer laser pulses for removal.
  • Taper and spacer sizes significantly influenced fracture patterns of the crowns.
  • 44 out of 60 crowns were classified as potentially reusable based on fracture analysis.

Cite This Study

Blender et al. (2026) studied this question.

synapsesocial.com/papers/69aa710d531e4c4a9ff5b632https://doi.org/10.3390/prosthesis8030026
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