Research on picosecond laser refurbishing method for reconditioning ceramic orthodontic brackets
Source abstract
Abstract
Laser refurbishment of hard, brittle ceramic orthodontic brackets using picosecond (ps) lasers is studied. High cleaning quality without residual adhesive on the bracket surface and with damage-free base material is achieved using a ps laser at 8.5 μJ/cm2 (average power 60 W, 3 mm spot size) for 6 s. A black spot is observed at the laser incidence position on the cleaned surface, which is carbon and silicon residue from resin thermal decomposition. No changes in strength occurred in the cleaned samples. Diffusion of the stress vibration caused by elastic waves generated by ultrashort high-frequency pulses is found to be the main cleaning mechanism.
Source: crossref · Quality: baseline
Research context
OpenAlex topics: Laser Applications in Dentistry and Medicine · Laser Material Processing Techniques
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Institute of Laser Engineering, Beijing University of Technology , Beijing 100124, China
Beijing Stomatological Hospital, Capital Medical University , Beijing 100050, China
Funding
NSFC
References (26)
Show source-provided references
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