PubMed · 5219452
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E Pillwein. 1966-05-16. ["Silpa"--the wrong way or a solution?].. https://pubmed.ncbi.nlm.nih.gov/5219452/
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AIM: To develop a reliable, machine-readable coding system for dental appliances. METHODS: Incorporation of two-dimensional bar codes and matrix codes into a range of dental appliances using printed thermal substrates and laser-etched ceramic discs. RESULTS: Problems including reaction of thermal substrates with methyl methacrylate monomer, loss of code clarity, limited areas available for bar codes, difficulty in scanning opaque pigmented acrylic resin and palatal and lingual surfaces were overcome using 4 mm2 data matrix codes etched onto ceramic discs. CONCLUSIONS: Reliable automatic identification of dental appliances was achieved using laser-etched matrix codes. Further development is necessary in relation to optimisation of code size, encryption, scanners and maintenance of code readability over time.
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