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A precision injection system and method for intralignmental anesthesia and the like having a syringe with a tubular handle portion to which are removably connectable individually tubular headpieces as a longitudinal extension thereof. The headpieces receive a carpule cartridge with semi-solid conten

A precision injection system and method for intralignmental anesthesia and the like having a syringe with a tubular handle portion to which are removably connectable individually tubular headpieces as a longitudinal extension thereof. The headpieces receive a carpule cartridge with semi-solid contents therein or with liquid injection contents monitored during injections through elongate windows on opposite sides of the headpieces. Provision is also made for injection of known composite materials the viscosity of which cannot be determined by standard viscosity measurement methods. A dosing plunger housed in the tubular handle portion in a retracted start position is activated by a servo-dosing lever and advances incrementally axially into a mounted headpiece for delivery of metered quantities of the contents of the carpule cartridge each time the servo-dosing lever is actuated. Provision is made for semiautomatic resetting of the dosing plunger to a retracted start position by depressing a resetting key and raising the syringe to a generally vertically raised position. The dosing plunger has a rack thereon activated by a ratchet cooperative with the servo-dosing lever so that a reduction in the normal pressure applied to the servo-dosing lever is effected in making the injections.

대표청구항 ▼

A precision injection system for intraligmental anesthesia, filling of tooth cavities by injection, and the like comprising, an intraligmental syringe having a tubular handle portion and exchangeable tubular headpieces mountable on and dismountable from the handle portion for exchange thereof with o

A precision injection system for intraligmental anesthesia, filling of tooth cavities by injection, and the like comprising, an intraligmental syringe having a tubular handle portion and exchangeable tubular headpieces mountable on and dismountable from the handle portion for exchange thereof with other individual headpieces, means for removably and releasably mounting the headpieces individually coaxially with the tubular handle portion extending longitudinally therefrom for jointly defining therewith a tubular syringe, each headpiece having in use at an end thereof a nozzle, each headpiece defining a chamber for carpule control and dimensioned for receiving therein and containing a carpule cartridge with either liquid or compositions of a semi-solid mass contents therein to be injected, a dosing plunger housed in the handle portion in a retracted starting position, a servo-dosing lever mounted externally on the tubular handle portion for activating the dosing plunger for incremental gradual advancing movement axially out of said handle portion from the starting position into said chamber of the headpiece to effect delivery of metered quantities of contents of the carpule cartridge for flow through said nozzle in dependence upon the incremental axial advancing movement of the dosing plunger, activating means on the tubular handle portion coactive with the servo-dosing lever and dosing plunger for activating the dosing plunger incrementally each time the servo-dosing lever is depressed, and means comprising a resetting key on the handle portion actuatable manually for enabling semiautomatic retraction of the dosing plunger to the retracted starting position.