A hand instrument designed for cleaving bone or enamel. It is bevelled on one side only and the shank may be straight or angled. A bone chisel is a single-ended instrument with a long handle and a square end which can be struck by a mallet. A Coupland's chisel, often referred to as an elevator, has a sharp curved working tip, available in three sizes in line with the long axis of the instrument. It is used to elevate and separate a tooth from its periodontal membrane; it was designed by Douglas Coupland in the early 1930s, initially as a set of 8 or 12 chisels. A Wedelstaedt chisel, first described by E. K. Wedelstaedt in 1907, has a blade that is continuous with the shank, has no constricting neck, curves rather than angles into the shank, and is manufactured in varying widths with either a reverse or regular bevel.
Types of chisels