Instrument for stain removal and polishing of natural teeth

Claim 1

A dental tool for polishing teeth comprising: (a) a handle adapted to be grasped in piston-like fashion; (b) a manifold connected to the top of the handle, said manifold including an air input line, an air output line, a water input line and a water output line; (c) a spray nozzle connected to the manifold and including air and water conduits connected to the air output line and the water output line of the manifold respectively, said spray nozzle extending from the manifold at an obtuse angle of less than 180° with respect to the handle; and (d) a mixing chamber for mixing air under pressure with an abrasive powder to create an abrasive-laden air stream, comprising a canister affixed to the manifold, said canister extending substantially vertically upwards from an upper side of the manifold when said handle is grasped in pistol-like fashion, thereby forming an obtuse angle with respect to both the handle and the nozzle, said canister having a bottom portion proximate said manifold, said bottom portion including air input means communicating with said air input line of said manifold for permitting air to pass from said air input line into said bottom portion of said cannister, said canister further including a vertical output tube connected to said air output line of said manifold extending through said bottom portion of said canister to just below the top of said cannister, whereby air entering said cannister through said air input means agitates the abrasive powder forcing the abrasive-laden air stream down through said output tube to said manifold.