Patent ID: 6106288
Filing Date: 2000-08-22
Classification: A61C

Abstract:
An abrasion system for delivering a mixture of pressurized gas and abrasive powder for use in dental procedures, the air abrasion system adapted to be attached to a pressurized gas source and a hose connected to a an abrasion hand piece, the system comprising the combination of:a first dispensing chamber having a reservoir for holding a supply of abrasive powder, an inlet port adapted for fluid communication with the pressurized gas source, a powder outlet port, and motor means for advancing abrasive powder through the powder outlet port;a mixing block having a first powder inlet port fluidly connected to the powder outlet port of the first dispensing chamber, and a purge port adapted for fluid connection to the pressurized gas source, wherein the first powder inlet port and purge port have associated therewith a first powder bore and purge bore, respectively, extending through the mixing bock and converging to form a common outlet connection adapted for releasable attachment to the hose;wherein pressurized gas is supplied to the purge port for continuous flow through the mixing block, hose, and hand piece;further comprising a second dispensing chamber having a reservoir for holding a supply of abrasive power, an inlet port adapted for fluid communication with the pressurized gas source, a powder outlet port, and motor means for advancing abrasive powder through the powder outlet port; wherein the mixing block further includes a second powder inlet port fluidly connected to the powder outlet port of the second dispensing chamber, the first power inlet port having associated therewith a second powder bore extending through the mixing block and leading to the common outlet connection.