Patent ID: 6497715
Filing Date: 2002-12-24
Classification: A61B

Abstract:
An ultrasonic hand piece comprising an ultrasonic vibration mechanism which outputs a longitudinal ultrasonic vibration, a twisted ultrasonic vibration, or a compounded longitudinal and twisted ultrasonic vibration, a casing for accommodating the ultrasonic vibration mechanism, and a horn which is mounted at one end of the casing for amplifying the vibration transmitted from said ultrasonic vibration mechanism,wherein said horn comprises a main body portion and a scalpel portion which is formed at a tip of the main body portion for cutting a bone or other hard tissue, and in an end portion of the scalpel portion is formed a working portion which comprises at least one face portion having at least one ridged engaging portion to prevent sliding of said scalpel portion on contact with a bone or other hard tissue, and an edge portion for raking the bone tissue finely fractured by the working portion.