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Dental treatment system

  • US 5,525,058 A
  • Filed: 07/19/1994
  • Issued: 06/11/1996
  • Est. Priority Date: 03/27/1992
  • Status: Expired due to Fees
First Claim
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1. A system for performing a dental procedure on teeth or associated tooth structure by means of abrasive particles carried by a fluid stream, comprising:

  • (a) a source of fluid under pressure;

    (b) a source of abrasive particles;

    (c) abrasive-mixing means supplied with said fluid under pressure and said abrasive particles, for combining said fluid under pressure with said abrasive particles to produce an abrasive-laden fluid stream;

    (d) nozzle means for delivering said abrasive-laden stream to the teeth or tooth structure undergoing said dental procedure; and

    (e) pressure control means supplied with said fluid under pressure for controlling the pressure of said fluid supplied to said abrasive-mixing means;

    (f) wherein said pressure control means comprises a servo valve having a fluid inlet, a fluid outlet, electrically controllable valve means positioned between said fluid inlet and said fluid outlet, and an electrical control terminal, said valve means being responsive to changes in the level of an electrical command signal at said electrical control terminal for adjusting said valve means to any selected one of a plurality of selected conditions, to set said pressure of said fluid supplied to said abrasive-mixing means to any of a corresponding plurality of selected pressure values.

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