|
|
The Technique
for incorporating the Acrylic Retention Cap in to the
removable partial denture
Benefits:
- The acrylic retention
cap may be easily removed (use heat) from the prosthesis and replaced or
repositioned if necessary.
- Clinical/Intra-oral:
the acrylic retention cap is easily connected to a cast frame in the mouth
- Clinical/Intra-oral:
the acrylic retention cap may be easily picked up in the mouth
|
M3: 694AKS
M2: RE0075 |
 |
|
M3: 694AKS2
M2: RE0095 |
 |
| Glaze porcelain and polish all metal (FIG
1). The
techniques for acrylic resin retention are the same for both the M2 and M3 extracoronal
attachments (FIG 2). Block out undercuts and fill the inside of the females (FIG
3). |
| Cover the inclined arm and recess (or
receptacle) of the female with 0.5mm of wax (FIG
4).
Stop the relief wax short of the attachment to provide a beading strip for the
acrylic resin of the removable prosthesis.
Duplicate the master cast and prepare the refractory cast to produce the
cast metal framework. No relief wax is necessary between the
cuspid and the molar tissue (FIG
5). The female contours must be clearly reproduced (FIG
6). |
| The milled parts must also be clearly reproduced (FIG
7).
Design and wax the cast frame to allow for open embrasures (FIG
8). Do not cover
the occlusal surface of the females with wax (FIG
9). |
| Place a minimum thickness of 0.6mm of wax around the females
(FIG 10). Complete and finish casting the metal frame. Be sure the access hole is
wide enough to allow access to the female (FIG
11). The cast frame must fit the abutment
accurately (FIG 12). |
| Place the metal space maintainer on the female (FIG
13).
Thread the male spring pin into the acrylic retention piece (FIG
14). The wing of
the acrylic retention piece may be slightly bent
or cut. Do not try to solder the acrylic retention piece to the cast
metal frame because of its titanium alloy (FIG
15). |
| Seat the male, which is threaded into the acrylic retention
cap, into the female (FIG 16). Connect the acrylic retention cap to the cast frame with
self curing acrylic resin (FIG
17). If using an opaque that processes at
400F, this process must be completed prior to seating the spring pin with Ceka Bond.
After final polishing, place a drop of Ceka Bond on the spring pin and thread in to
the acrylic retention cap (FIG
18). Ceka Bond
will eliminate potential gradual unthreading of the male spring pin. |
T000.REV.00
|
