Diameter of Diamond Cutting Bur TR-11EF (Dentistry)

The code TR-11EF refers to a taper round-end, extra-fine diamond bur, but the exact head diameter can vary slightly by manufacturer.

Typical Diameter Values

• Many manufacturers list TR-11EF with a head diameter of about 1.4 mm (ISO code often given as 199/014, where “14” = 1.4 mm). (dianfong.com)
• Some brands (e.g., certain Mani listings) specify TR-11EF as ISO 199/013, i.e. around 1.3 mm maximum head diameter. (ahpdentalmedical.com.au)
• Other manufacturers may use the TR-11EF code for slightly larger variants (e.g., ISO 199/016 ≈ 1.6 mm). (net32.com)

Practical Takeaway

In routine clinical use, TR-11EF burs are generally in the 1.3–1.4 mm head diameter range, but the exact size is brand-specific. For precise work (e.g., tooth reduction planning, crown margin design), it is best to:

• Check the ISO number and diameter printed on the bur box or catalog for your specific manufacturer.
• Confirm whether the listed value is in 1/10 mm units (e.g., “14” = 1.4 mm).

For educational and informational purposes only. Not a diagnosis or medical advice. Please consult a licensed healthcare professional.

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