Method of fracturing interfaces with an ultrasonic tool

Claim 1

A method for fracturing the interface between two dental structures that have been secured together, comprising the steps: providing an ultrasonic device having a generator for providing a predetermined frequency, a piezoelectric converter for producing a substantially bi-directional movement along the axis of the converter at said predetermined frequency, a horn having a connecting end and a working outer end, said connecting end being secured to said converter, for transferring said bi-directional movement to said outer end of said horn; and placing the outer working end of said horn against one of said dental structures at an angle equal to or less than about 60° with respect to a plane substantially containing the interface between said dental structures.

Claim 2

A method for fracturing the interface between two dental structures that have been secured together, comprising the steps: providing an ultrasonic device having a generator for providing a predetermined frequency, a piezoelectric converter for producing a substantially bi-directional movement along the axis of the converter at said predetermined frequency, a horn having a connecting end and a working outer end, said connecting end being secured to said converter, for transferring said bi-directional movement to said outer end of said horn; and placing the outer working end of said horn against one of said dental structures at an angle equal to or less than about 60° with respect to a plane substantially containing the interface between said dental structures.

Claim 4

A method for fracturing the interface between two dental structures that have been secured together, comprising the steps: providing an ultrasonic device having a converter for producing a bi-directional movement along the axis of the converter at a predetermined frequency, a horn having a connecting end and a working outer end, said connecting end being secured to said converter for transferring said bi-directional movement to said outer end of said horn; and placing the outer working end of said horn against one of said dental structures at an angle less than about 60° with respect to a plane containing the interface between said dental structure.

Claim 5

A method for fracturing the interface between two dental structures that have been secured together, comprising the steps: providing an ultrasonic device having a converter for producing a bi-directional movement along the axis of the converter at a predetermined frequency, a horn having a connecting end and a working outer end, said connecting end being secured to said converter for transferring said bi-directional movement to said outer end of said horn; and placing the outer working end of said horn against one of said dental structures at an angle less than about 60° with respect to a plane containing the interface between said dental structure.

Claim 7

A method for fracturing the interface between two dental structures that have been secured together, comprising the steps: providing an ultrasonic device having a generator for providing at a frequency equal to or greater than 18 kHz, a piezoelectric converter for producing a bi-directional movement along the axis of the converter at a predetermined frequency, a horn having a connecting end and a working outer end, said connecting end being secured to said piezoelectric converter said horn transferring said bi-directional movement to said outer end of said horn, and working tip secured to the outer end of said horn, placing the tip at an acute angle with respect to the plane which substantially contains the interface between said dental structures; and placing the tip at an angle less than or equal to 60° with said plane containing the interface between said dental structures.

Claim 8

A method for fracturing the interface between two dental structures that have been secured together, comprising the steps: providing an ultrasonic device having a generator for providing at a frequency equal to or greater than 18 kHz, a piezoelectric converter for producing a bi-directional movement along the axis of the converter at a predetermined frequency, a horn having a connecting end and a working outer end, said connecting end being secured to said piezoelectric converter said horn transferring said bi-directional movement to said outer end of said horn, and working tip secured to the outer end of said horn, placing the tip at an acute angle with respect to the plane which substantially contains the interface between said dental structures; and placing the tip at an angle less than or equal to 60° with said plane containing the interface between said dental structures.