Dispensing syringe having multiple barrels for discharging a dental composition

Abstract

A dispensing syringe for dispensing a multi-component dental composition, preferably a two component composition, is provided. The syringe includes a syringe body with multiple elongated barrels for storing the components of the composition; a threaded plunger rod assembly; and a rotatable, threaded connector knob. Preferably, the syringe body has a double-barrel structure and the plunger rod assembly includes two plunger rods that slide within the barrels. The threaded knob has a through-bore with a continuous internal thread for engaging the outer threads of the first and second plunger rods. A dental practitioner manually rotates the knob to displace the first and second plunger rods and discharge the components. The dispensing syringe may further include a dispensing tip containing a static mixing element for mixing the components and dispensing the mixed composition.

Description

BACKGROUND OF THE INVENTION [0001] 1. Field of the Invention [0002] The present invention relates generally to a dispensing device for dispensing a multi-component composition such as, for example, epoxy cements, adhesives, medicaments, and dental materials. More particularly, the invention relates to a dispensing syringe having a syringe body with at least two elongated barrels. Each barrel is used to store and dispense a component of the composition. The dispensing syringe may include a dispensing tip containing a static mixing element for mixing the components and then dispensing the mixed composition. Preferably, the syringe is used to mix and dispense a dental composition such as, for example, a dental cement or adhesive. [0003] 2. Brief Description of the Related Art [0004] Dental professionals use dispensing syringes for storing, mixing, and dispensing a wide variety of dental compositions. For instance, a dentist may use a dispensing syringe in preparing and dispensing denta...

AI Technical Summary

Benefits of technology

[0018] In other embodiments of the syringe of this invention, a syringe having more than two barrels can be used to dispense a multi-compone

Problems solved by technology

One drawback, however, is that it can be difficult to dispense resins having a thick consistency using such conventional double-barrel syringes.

A sufficient amount of pressure must be exerted on the thumb pad or other actuator handle, and it can be difficult to apply this force while handling the syringe at the same time.

However, such applicator guns have several disadvantages including their added bulk, complexity of operation, and relatively high cost to manufacture.

Images