milling bur
A precision rotary cutting tool used in CAD/CAM milling machines to shape dental restorations from ceramic, composite, or metal blanks.
Full Definition
A milling bur is a carbide or diamond-coated cutting instrument used within automated dental milling units to carve prosthetic restorations from prefabricated blocks of material. Burs come in a variety of diameters and tip geometries to accommodate different restoration types and materials. Their lifespan is limited by wear, and documentation of bur usage cycles is important for quality control in dental laboratories. Editors working with laboratory equipment manuals or quality assurance reports should recognise milling burs as consumable tooling items distinct from surgical burs used chairside. The term is sometimes shortened to 'bur' in internal lab documentation, but full form is preferred in formal reports.
Usage
Usage note: Spell as 'bur' (not 'burr') in dental laboratory contexts, following standard dental profession usage.
In Context
- "The quality control log recorded the number of restorations completed per milling bur to track wear rates." — Laboratory quality assurance report
- "A worn milling bur can introduce surface defects into zirconia frameworks before sintering." — Dental laboratory equipment manual