Ultrasonic dental tool having a light source

1. An ultrasonic dental insert comprising:

a first transducer for generating ultrasonic vibrations;

a connecting body having a proximal end and a distal end having a tip attached thereto, the proximal end attached to the first transducer so as to receive the ultrasonic vibrations therefrom and to transmit the ultrasonic vibrations toward the tip attached to the distal end, wherein the connecting body comprises a material having magnetic permeability;

a second transducer disposed substantially proximate to the connecting body for generating a voltage signal in response to movement of a portion of the connecting body according to the ultrasonic vibrations due to the magnetic permeability of the connecting body;

at least one rare earth magnet in close proximity to the connecting body, wherein the at least one rare earth magnet is mounted in a stationary position such that the connecting body moves relative to the at least one rare earth magnet; and

at least one light source substantially proximate to the tip, said at least one light source being connected to and receiving the voltage signal from the second transducer to generate light.

2. The ultrasonic dental insert of claim 1 , wherein the second transducer comprises a coil surrounding said portion of the connecting body, wherein the at least one rare earth magnet is mounted in a position such that it is not surrounded by the coil.

3. The ultrasonic dental insert of claim 2 , wherein said at least one light source is an LED connected between a first end of the coil and a second end of the coil.

4. The ultrasonic dental insert of claim 3 , further comprising a zener diode connected between the first end of the coil and the second end of the coil, such that the zener diode clamps voltage across the LED to a predetermined value.

5. The ultrasonic dental insert of claim 2 further comprising a bobbin on which the coil is mounted, said bobbin comprising a one-piece cylindrical structure for sliding onto said connecting body, and wherein said bobbin includes at least one holder formed integrally therewith, wherein said at least one rare earth magnet is disposed in said holder.

6. The ultrasonic insert of claim 5 further comprising at least two rare earth magnets contained within opposing holders positioned on opposite sides of the connecting body.

7. The ultrasonic dental insert of claim 2 , further comprising a hand grip enveloping at least said portion of the connecting body.

8. The ultrasonic dental insert of claim 7 , wherein the coil is at least partially disposed within the hand grip.

9. The ultrasonic dental insert of claim 8 , further comprising a bobbin at least partially disposed within the hand grip in a surrounding relationship with said portion of the connecting body, wherein the coil, the at least one rare earth magnet and said at least one light source are mounted on the bobbin.

10. The ultrasonic dental insert of claim 9 , further comprising a retaining ring snapped onto the connecting body, wherein the bobbin is fixedly attached to the retaining ring.

11. The dental insert of claim 9 wherein the bobbin includes a holder mounted thereon, and wherein the at least one rare earth magnet is disposed in the holder.

12. The ultrasonic dental insert of claim 7 , wherein the hand grip is injection molded over at least said portion of the connecting body.

13. The ultrasonic dental insert of claim 7 , wherein the at least one rare earth magnet is present inside the hand grip.

14. The ultrasonic dental insert of claim 1 , wherein the first transducer comprises a magnetostrictive type or a piezoelectric type transducer.

15. The ultrasonic dental insert of claim 1 , wherein the at least one rare earth magnet is permanently or removably attached to the dental insert.

16. The ultrasonic dental insert of claim 1 , wherein the at least one rare earth magnet is contained within a holder proximate the connecting body.

17. The ultrasonic dental insert of claim 16 wherein said at least one rare earth magnet is adhesively attached to portions of the holder.

18. The ultrasonic dental insert of claim 16 further comprising at least two rare earth magnets contained within opposing holders positioned on opposite sides of the connecting body.

19. The dental insert of claim 1 wherein said tip comprises a tapered portion that is curved, and wherein said curve in said tapered portion is curved towards the light source or curved away from the light source.

20. The dental insert of claim 1 wherein the light source emits an output light, and wherein, during use, the brightness of the output light is increased by the at least one rare earth magnet.

21. The dental insert of claim 1 further comprising a handpiece for holding the ultrasonic dental insert and for providing electromagnetic energy to the first transducer to generate the ultrasonic vibrations, wherein the handpiece further comprises a retainer ring fixedly coupled to one of the body and the rotator head and rotatably coupled to the other of the body and the rotator head, such that the rotator head is rotatably coupled to the body.