bur (bur) a form of drill used for creating openings in bone or similar hard material.
bur.
bur [ber]
| bur or burr (bûr) n. 1. A rotary cutting instrument used in dentistry for excavating decay, shaping cavity forms, and reducing tooth structure. 2. A drilling tool for enlarging a trephine hole in the cranium. |
bur.
See burr.
bur [ber]
a form of drill used for creating openings in bone or similar hard material. Also spelled burr.
Bur. From Dorland's, 2000.
bur,
n a rotary cutting instrument of steel or tungsten carbide, supplied with cutting heads of various shapes.
bur, carbide,
n a bur made of tungsten carbide; used at high rotational speeds.
bur, crosscut,
n a bur with blades slotted perpendicularly to the axis of the bur.
bur, end-cutting,
n a bur that has cutting blades only on the end of its head.
bur, excavating,
n a bur used to remove dentin and debris from a cavity.
bur, finishing,
n a bur with numerous fine-cutting blades placed close together; used to contour metallic restorations.
n See insert, intramucosal.
bur, inverted cone,
n a bur with a head shaped like a truncated cone, the larger diameter being at the terminal (distal) end.
bur, plug-finishing,
n See bur, finishing.
bur, round,
n a bur with a sphere-shaped head.
bur, straight fissure,
n a bur without crosscuts that has a cylindrical head.
bur, tapered fissure,
n a bur having a long head with sides that converge from the shank to a blunt end.
bur
a surgical instrument used to ream out the lining of a cavity, for example the lateral ventricle of horses in the operation for roaring, or to debride bone or teeth. A long stem with a round or oval head carrying rasp-like teeth. See also burr.
finishing bur
for shaping and smoothing composite or amalgam when used for filling teeth.
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