US No. 7686 Bur – Busch Finishing Taper Round Carbide, Made in Germany

The US No. 7686 is the American number for a round-end taper finishing bur with a 1.8 mm head (ISO size 018): a long tapered head with a rounded tip and many fine blades, for refining crown preparations and finishing composite margins. Busch & Co. manufactures it in Germany as Busch No. 375R 018. Every US No. 7686 on this page is a genuine Busch instrument and ships from our US warehouse.

Which US No. 7686 Do You Need?

US No.	Busch No.	Material	Cut	Shank	Best for	Pack
7686	375R 018	Carbide	Finishing	FG	Crown prep refinement, composite margins	2

FG (friction grip, 1.6 mm shank, high-speed). See the Busch Bur Size Chart for head and shank dimensions.

Clinical Uses of the US No. 7686

Crown preparation: smoothing axial walls and chamfer margins on molars after diamond reduction.
Composite margins: finishing broad facial and proximal margins.
Onlay and inlay preparation: refining internal walls and cavosurface margins.

At 1.8 mm the No. 7686 is the wider of Busch's two round-end taper finishers; the No. 7675 is the 1.6 mm size.

Speed and Technique

Finishing burs work at reduced pressure: use them with water spray in the high-speed handpiece and let the blade count produce the surface; heavy pressure only dulls them. Maximum recommended speeds for every Busch shape are in our Dental Bur Speed Chart, and reprocessing steps in the Bur Sterilization Guide.

Made in Germany by Busch & Co.

Busch & Co. has manufactured rotary instruments in Engelskirchen, Germany since 1905. Every instrument on this page is a genuine Busch product, precision-ground on a concentric shank under ISO-certified quality management and guaranteed to arrive free of manufacturing defects under our Busch arrival guarantee.

Dental Instruments, Tools, Burs, Diamonds and Polishers Made In Germany

FAQ

What is the Busch number for a US 7686 bur? Busch No. 375R 018 in carbide, FG shank.

What size is a No. 7686 bur? The No. 7686 has a 1.8 mm head diameter (ISO size 018) on a round-end taper finishing head, ISO shape 198, 8 mm long.

7675 or 7686? Same shape; choose by diameter. The 7675 (1.6 mm) for anterior and premolar margins, the 7686 (1.8 mm) for molar axial walls.

Are Busch No. 7686 burs reusable? Yes. Carbide burs are cleaned, disinfected and sterilized between patients and replaced when they dull; the Bur Sterilization Guide gives the validated steps.

Related resources: US Bur Number Finder · Bur Comparison Chart · Speed Chart · Bur Glossary · Nearby size: US No. 7675