Dentistry – Apparatus – Having intra-oral dispensing means
Patent
1997-06-25
2000-07-25
Lucchesi, Nicholas D.
Dentistry
Apparatus
Having intra-oral dispensing means
A61C 302
Patent
active
060930217
ABSTRACT:
A dental air-abrasion system having at least one air source for supplying pressured air to at least a primary air passageway and a secondary air passageway. The primary air passageway has an inlet conduit that establishes fluid communication between the air source and a venturi cup. The venturi cup is capable and intended to contain abrading particulate to be suspended in a primary air flow passing within the primary air passageway. The primary air passageway also has an exit conduit establishing fluid communication between the venturi cup and a manifold. The secondary air passageway includes a bypass conduit establishing fluid communication between the air source and the manifold. The manifold provides a fluid juncture for joining the primary air passageway with the secondary air passageway into a single uniform particulate delivery passageway. The uniform particulate delivery passageway terminates in a dispensing tip. Optionally, the air source includes a purifier for cleansing supplied air before its introduction into the air passageways. An agitator may also be coupled to the venturi cup for preventing compaction of abrading particulate in the venturi cup to assure suspension of the abrading particulate in the air flow passing from the venturi cup into an exit conduit. Further, an abrading particulate sensing means is directed across at least one conduit downstream from the venturi cup for sensing the amount of abrading particulate picked up from the cup.
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