(this name was determined to be unsuitable after new "modes" were discovered and now it is referred to as the "Multi Mode Endo Syringe.")
More recently with the introduction of the cartridge syringe this syringe is obsolete and no longer sold.
There are two basic kinds of syringes, micrometer screw and push plunger(like a hypodermic).
It takes considerable pressure to get a very putty-like mix of cement through the bore of a 30gauge needle which has an I.D. of 0.15mm.
One cannot just push a plunger an accomplish anything so it requires the mechanical advantage of a screw or ratchet to do that.
The Precision Endo Syringe has since 1978 set the standard for endodontic syringes.
The inside diameter is 0.120" and it uses a 5-40 thread on the plunger to force the cement through the needle.
This is fine for most apical sealing but then large canals might take as much as two or three minutes to fill.
The Multi_Mode Syringe allows you to use the ratchet-drive mechanism of the PDL intraligamentary syringe to back-fill much faster, once the tip of the canula is away from the apex.
In April 2005 we announced the introduction of a new device called a GPS( stands for General Purpose Syringe ) which can replace the screw mechanism of the endo syringes (either Multi-Mode or Cartridge ) and can be used in the ratchet mode for backfilling and in the micrometer mode for sealing the apex.