Tool for exodontia
First Claim
1. A dental tool for extracting a tooth which is secured to an alveolar bone through a pericementum, comprising a cylindrical housing, an acoustic transducer disposed within the housing and opertive to be driven from a source of a high frequency power which is arranged externally of the housing for producing vibrational energy of a predetermined frequency and a predetermined amplitude, a vibrating member having one end thereof connected to the acoustic transducer, and a blade attached to the other end of the vibrating member in a replaceable manner, the blade having an edge which is disposed externally of the housing and having a thickness which is substantially less than the thickness of the pericementum, the acoustic transducer having an oscillating frequency higher than the natural frequency of the tooth, the acoustic transducer exciting the blade through the vibrating member so that an amplitude of oscillation as measured at the edge of the blade is equal to or less than 15 micrometers.
1 Assignment
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Accused Products
Abstract
A dental tool is provided for extracting a tooth which is secured to an alveolar bone through a pericementum. The tool includes an elongate, flat and thin blade operatively connected to an acoustic transducer which produces ultrasonic vibrational energy. The blade has a thickness on the order of about 0.2 to 0.5 mm which is substantially less than the thickness of the pericementum to enable the blade to and cut through the pericementum located between the tooth and the alveolar bone along the profile of the tooth under excitation by the acoustic transducer. The blade transmits ultrasonic oscillation to the tooth so as to insensitize the pain transmitting system of the tooth. The pericementum is effectively cut with a reduced average cutting resistance while the insensitization is maintained.
85 Citations
6 Claims
- 1. A dental tool for extracting a tooth which is secured to an alveolar bone through a pericementum, comprising a cylindrical housing, an acoustic transducer disposed within the housing and opertive to be driven from a source of a high frequency power which is arranged externally of the housing for producing vibrational energy of a predetermined frequency and a predetermined amplitude, a vibrating member having one end thereof connected to the acoustic transducer, and a blade attached to the other end of the vibrating member in a replaceable manner, the blade having an edge which is disposed externally of the housing and having a thickness which is substantially less than the thickness of the pericementum, the acoustic transducer having an oscillating frequency higher than the natural frequency of the tooth, the acoustic transducer exciting the blade through the vibrating member so that an amplitude of oscillation as measured at the edge of the blade is equal to or less than 15 micrometers.
Specification