Air water vacuum syringe and method of use

1. An air water vacuum dental instrument, comprising:

a handle;

a head;

an air control carried by at least one of the handle and the head;

a water control carried by at least one of the handle and the head;

a vacuum control carried by at least one of the handle and the head, the vacuum control including a vacuum control valve carried by the head and a lever to control the valve;

an air water vacuum tip coupled to the head and configured to provide at least air, water, and vacuum in a mouth of a dental patient at the air water vacuum tip;

the head having a first communication passage which communicates with the air water vacuum tip and a second communication passage which is configured to communicate with a vacuum source;

the vacuum control valve being located between the first and second communication passages and including a periphery with a pair of high flow rate evacuator ports and a single, low flow rate saliva ejector port in communication with the pair of high flow rate evacuator ports;

wherein the vacuum control valve is configured for rotation between a high-flow vacuum condition in which the pair of high flow rate evacuator ports communicate with the first and second communication passages, a low-flow vacuum condition in which one of the high flow rate evacuator ports is in partial communication with one of the communication passages and the low flow rate saliva ejector port is in communication with the other communication passage, and a no-flow vacuum condition in which the pair of high flow rate evacuator ports and low flow rate saliva ejector port are blocked from communication with the first and second communication passages.

2. The air water vacuum dental instrument of claim 1 , further including

an auto-shutoff mechanism that automatically shuts off the vacuum in the mouth of the dental patient on detection of at least partial blocking of the air water vacuum tip.

3. The air water vacuum dental instrument of claim 2 , wherein the auto-shutoff mechanism includes a normal condition where a suction force overcomes an opposing force to allow the vacuum in the mouth of the dental patient and a shut-off condition where the opposing force overcomes the suction force to shut off the vacuum in the mouth of the dental patient.

4. The air water vacuum dental instrument of claim 3 , wherein the auto-shutoff mechanism includes at least one spring to provide the opposing force.

5. The air water vacuum dental instrument of claim 3 , wherein the auto-shutoff mechanism includes at least one magnet to provide the opposing force.

6. The air water vacuum dental instrument of claim 1 further including a rotatable tip positioner that rotatably couples the air water vacuum tip to the head to provide at least air, water, and vacuum in a mouth of a dental patient at the air water vacuum tip.

7. The air water vacuum dental instrument of claim 1 , further including a spring that urges the vacuum control to the no-flow vacuum condition.

8. The air water vacuum dental instrument of claim 1 , wherein the vacuum control includes a rotatable trigger valve barrel and a trigger carried by the handle, the trigger operably associated with the rotatable trigger valve barrel to rotate the trigger valve barrel to a different flow condition with each pull of the trigger.

9. The air water vacuum dental instrument of claim 1 , wherein the vacuum control includes a high flow rate suction trigger and a lower flow rate evacuator toggle carried by the handle.

10. The air water vacuum dental instrument of claim 1 further including a hose connected to the handle and delivering water and air therethrough, at least one of the hose, the handle, and the head including one or more heating elements to heat at least one of the water and the air.

11. The air water vacuum dental instrument of claim 9 , wherein the hose includes a heating lumen, an adjacent water lumen, and an adjacent air lumen, and the heating lumen includes one or more heating elements to heat the water in the water lumen and the air in the air lumen.

12. The air water vacuum dental instrument of claim 1 , wherein the head is removably coupled to the handle.

13. The air water vacuum dental instrument of claim 12 , further including a quick-release mechanism that is actuatable to decouple the head from the handle.

14. The air water vacuum dental instrument of claim 12 , wherein the head is at least one of sterilizable and autoclavable.

15. The air water vacuum dental instrument of claim 1 , wherein the air water vacuum tip is configured to bend at least one of water and air emitted at the tip.

16. The air water vacuum dental instrument of claim 15 , wherein the air water vacuum tip includes a distal vertex, a proximate vertex with at least one of air and water emitted therefrom, and a vacuum port therebetween, at least one of water and air emitted at the proximate vertex bending towards the vacuum port during vacuum.

17. The air water vacuum dental instrument of claim 1 , wherein the air water vacuum tip includes a distal vertex with at least one of air and water emitted therefrom, a proximal vertex, and a vacuum port therebetween, at least one of water and air emitted straight at the distal vertex without bending towards the vacuum port during vacuum.

18. The air water vacuum dental instrument of claim 1 , wherein the head is removably coupled to the handle and the air water vacuum dental instrument includes an automatic water shut-off valve mechanism that automatically shuts off water flow upon decoupling of the head from the handle and an automatic air shut-off valve mechanism that automatically shuts off air flow upon decoupling of the head from the handle.