Abstract: A gingival retraction cord tool comprising a handle which has a front end formed into an elongated barrel and a rear end formed into an enlarged body. The enlarged body includes an outer end which is movable relative to the elongated barrel. Extending through the elongated barrel and the enlarged body is a through hole and located within that through hole is a length of gingival retraction cord. From the front end of the elongated barrel the retraction cord is formed into a closed loop. Movement of the outer end is between a locked position and an unlocked position. When in the locked position the cord is not movable relative to the elongated barrel and when in the unlocked position the cord is movable relative to the elongated barrel. The loop is to be placed around a tooth with the cord to be moved relative to the handle to decrease the size of the loop and snugly locate the cord about the tooth. The loop is then further decreased in size by twisting of the handle to tightly locate the loop on the tooth.

Abstract: A dispenser for a quantity of a retraction cord where the cord is impregnated with a medicinal substance. The outer free end of the cord is conducted through an outlet hole formed within a cover which closes the access opening into the internal chamber of the housing where the cord stored. A lid is mounted on the cover with this lid including a cutting blade. This lid is movable between an open and a closed position and when in the open position the free outer end of the cord can be pulled from the dispenser a desired amount. As the lid is closed, the cutting blade severs the cord permitting the severed strand of the cord to be utilized. The remaining cord within the dispenser is closed to the ambient thereby keeping the stored cord in the dispenser from contamination.

Abstract: The hydrocolloid injection system which utilizes a dispensing syringe as the vial within which the hydrocolloid impression material is shipped and stored prior to usage. The syringe includes a transparent barrel within which the hydrocolloid material is located. A plunger is slidingly mounted within the barrel which is to function to cause the hydrocolloid material to flow from the barrel through an outlet opening. The plunger forms an airtight and watertight seal with respect to the barrel with also a cap being located about the outlet opening of the barrel also forming an airtight and watertight seal. The barrel, plunger and cap can all be located within boiling water with no fear of the water itself actually coming into contact with the hydrocolloid impression material. During usage, the cap will be removed and a nozzle assembly mounted in conjunction with the barrel to facilitate depositing of the hydrocolloid impression material at its desired location.