wpe1E.jpg (6629 bytes)

Overdenture System

wpe111.jpg (19673 bytes)
The attachment female in the post coping and the adjustable spring pin in the removable prosthesis.

Advantages:

  • May require less vertical space
  • Provides a more stable prosthesis
  • Easier to service

 

Fabrication of the post coping: Soldering Technique

1wpe110.jpg (18469 bytes) 2wpe111.jpg (27289 bytes) 3wpe118.jpg (18366 bytes)
The coping after casting and finishing (FIG 1).  Use the (RE) P4 mandrel for positioning the base ring.  Thread the Pallax base ring onto the mandrel (FIG 2).  Reduce the cast coping to 0.3mm.  Position the base ring in direct contact with the post coping.  The base ring will be surrounded with solder (FIG 3).
4wpe119.jpg (17277 bytes) 5wpe125.jpg (16170 bytes) 6wpe126.jpg (22255 bytes)
Parallel the base rings and secure with sticky wax (FIG 4).   The RE H4 and H4 soldering accessories for base rings (FIG 5).  Apply liquid colloidal graphite, or anti flux, to the threaded areas to assure easy removal after soldering.   Maintain horizontal position during investing to assure a proper flow of solder (FIG 6).
7wpe127.jpg (24938 bytes) 8wpe128.jpg (22757 bytes) 9wpe14B.jpg (22892 bytes)
Boil out after 45 minutes setting time (FIG 7).  Ceka Sol is recommended for soldering (FIG 8).  Do not use any anti flux, as Ceka Sol contains its own flux.  Evenly apply the solder.  Slightly heat the soldering accessory for easier removal (FIG 9).

10wpe129.jpg (16625 bytes)

11wpe12A.jpg (15794 bytes)

In cases of limited space, the post coping may be waxed up in a concave form (FIG 10).  The rounded shape of the coping allows for easy patient cleaning and hygienic maintenance (FIG 11).

The next step: retaining the female in the prosthesis

T0031.REV.00