Abrasion hand piece for use with abrasion system

• US 5,967,779 A
• Filed: 10/17/1997
• Issued: 10/19/1999
• Est. Priority Date: 10/17/1997
• Status: Expired due to Fees

• Current Assignee: Gendex Corporation (Danaher Corporation)
• Original Assignee: DENTSPLY International Incorporated (Astrazeneca PLC)
• Inventors: Neilsson, Gary, Chang, Shu Kun, Brassil, John Michael, Fraquelli, Roberto Giovanni
• Primary Examiner(s): Lucchesi, Nicholas D.
• Application Number:
  US08/951,948
• Time in Patent Office: 732 Days
• Field of Search: 433/80, 433/82, 433/88, 51/319, 51/320, 51/321
• US Class Current: 433/88
• CPC Class Codes: A61C 3/025 Instruments acting like a sandblast machine, e.g. for cleaning, polishing or cutting teeth

Abstract

An abrasion hand piece for use with an air abrasion system to perform dental procedures. The hand piece is adapted for connection to the air abrasion system by a hose and has a body member which allows tips to be releasably attached thereto. The releasable tip feature allows the body member to be used with a number of different tips, thereby reducing the number of tools that the dentist must have on hand and must sterilize between procedures. The tips have an outer coating which is softer and warmer to the patient when placed in the mouth. The outer coating is color coded so that the orifice size of the tips may be readily identified. An illumination device is attached to the hand piece to allow the dentist to better monitor the procedure and to provide for aiming the hand piece at the desired tooth area. The hand piece with releasable tip feature, when used with an abrasion system having a continuous purge, allows the tip to be removed and used later during the same procedure without creating a crosstalk or backflow situation.

Claims

1. An abrasion hand piece for use with an air abrasion system to perform dental procedures, the hand piece adapted for releasable attachment to a hose leading to the air abrasion system, the hand piece comprising:

an elongate body member extending along an axis having base and head ends, a central bore extending through the body member along the axis, and first and second portions connected by means for swiveling the first portion with respect to the second portion, and

a tip removably attached to the head end of the body member with attachment means, the tip having a connection end and a discharge end, a central passage extending through the tip from the connection end to the discharge end, a nozzle orifice located at the discharge end having a given size, the nozzle orifice being disposed at an angle with respect to the axis.

2. The abrasion hand piece of claim 1 in which the body member is generally cylindrical and has a contoured outer surface.

3. The abrasion hand piece of claim 1 in which the tip has an outer coating of soft silicone material.

4. The abrasion hand piece of claim 1 in which the tip has an outer coating of fluorinated rubber compound material.

5. The abrasion hand piece of claim 1 in which the tip has an outer coating of nylon material.

6. The abrasion hand piece of claim 1 in which the tip has an outer coating of thermoplastic material.

7. The abrasion hand piece of claim 1 further comprising means for providing illumination attached to the tip.

8. An abrasion hand piece set for use with an air abrasion system to perform dental procedures, the abrasion hand piece set comprising:

an elongate body member extending along an axis having a central bore extending through the body member, and base and head ends; and

first and second groups of tips adapted for releasable attachment to the body member, each tip of the first and second groups having a connection end and a discharge end, a central passage extending through the tip from the connection end to the discharge end, and a nozzle orifice on the discharge end disposed at an angle with respect to the axis of the body portion;

wherein the nozzle orifice of each tip in the first group of tips has a first diameter and the nozzle orifice of each tip in the second group of tips has a second diameter.

9. The abrasion hand piece set of claim 8 in which each tip in the first and second groups of tips has an outer coating, the outer coating of the first group having a first color and the outer coating of the second group having a second color.

10. An air 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, the system comprising the combination of:

a 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 ports;

a mixing block having a powder inlet port fluidly connected to the powder outlet port of the dispensing chamber, a purge port adapted for fluid connection to the pressurized gas source, and a common outlet connection; and

an abrasion hand piece fluidly communicating with the outlet connection, the hand piece including a body member extending along an axis and having base and head ends, a central bore extending through the body member, and a tip removably attached to the head end of the body member and having a nozzle orifice for discharging the mixture of pressurized gas and abrasive powder;

wherein pressurized gas is supplied to the purge port for continuous flow through the mixing block, hose, and hand piece.