Friday, August 5, 2011

SHARP INSTRUMENTS 6




















Gigli Saw & Chisel

Gigli saw is another instrument used to carry out osteotomy. The instrument has two handles, and a lengthwise twisted stainless-steel wire is hooked to them.

Identification points
· It allows cutting bone in small spaces
· It does not damage soft tissue
· The cutting edge of the wire can be passed behind a bone
The two handles provide to-and-fro movement to cool the wire as it becomes hot during
the procedure

What operations have you seen with the use of Gigli saw?

· Brain surgery (osteoplastic flaps)
· Hemimandibulectomy or incomplete removal of the mandible
(Esmarch’s operation).
· McMurray’s osteotomy.

A power-driven oscillating bone saw is now being used in bone surgery.

Chisel
Chisels are sharp bone-cutting instruments bevelled on one side only.
Thus they cannot cut deep into a bone.

Identification points

· It has a sharp edge bevelled on one side.
· It has shaft above the edge.
· It has a handle (four sided) for hand grip.
· It has a head at upper end for hitting with mallet.
· It is used to cut and remove chips from bone as in sequestrectomy, SP nailing, or bone grafting.

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