Surgical Scissors

Scissors are hand-operated cutting instruments. They consist of a pair of metal blades pivoted so that the sharpened edges slide against each other when the handles (bows) opposite to the pivot are closed.
HISTORY
Scissors from 2nd century Asia MinorIt is most likely that scissors were invented around 1500 BC in ancient Egypt.[1] The earliest known scissors appeared in Mesopotamia 3,000 to 4,000 years ago. These were of the 'spring scissor' type comprising two bronze blades connected at the handles by a thin, flexible strip of curved bronze which served to hold the blades in alignment, to allow them to be squeezed together, and to pull them apart when released.Spring scissors continued to be used in Europe until the sixteenth century. However, pivoted scissors of bronze or iron, in which the blades were pivoted at a point between the tips and the handles, the direct ancestor of modern scissors, were invented by the Romans around AD 100.[2] They entered common use not only in ancient Rome, but also in China, Japan, and Korea, and the idea is still used in almost all modern scissors.

A pair of scissors consists of two pivoted blades. In lower quality scissors the cutting edges are not particularly sharp; it is primarily the shearing action between the two blades,Mechanically, scissors are a first-class double-lever with the pivot acting as the fulcrum. For cutting thick or heavy material, the mechanical advantage of a lever can be exploited by placing the material to be cut as close to the fulcrum as possible. For example, if the applied force (at the handles) is twice as far away from the fulcrum as the cutting location (i.e., the point of contact between the blades,

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