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This research aims to assess the efficiency of Er:YAG laser for removing lithium disilicate crowns and their potential for reuse.

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

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.

Blender et al. (2026) studied this question.

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