CERAMIC FILES AND BURS

摘要

The present invention concerns a cutting or abrasive tool (1) such as a bur or a file that is produced by ceramic injection moulding with specific profiles or teeth. The tool can be a bur or a file that is directly produced by this process with no need for an extra treatment. Such tools are easily and cheaply produced and can be single use tools. The defect line (2) at the mould split plane location may advantageously be used as part of the abrasive or cutting profile. The tool may be made from stabilised zirconium dioxide (ZrO2), pure aluminium oxide (Al2O3) or a mixture of both. The cutting profile may include a face angle of about 5 degrees, a back angle of about 17 degrees and a gullet angle of 78 degrees (see FIG. 2).