|
|
Ceka Extracoronal
Attachments--Red & Blue System
Benefits:
- The red and blue systems provide the convenience of
directly casting the female with the abutment crown(s)
- Select the RED system for
casting precious or
semi-precious alloys
- Select the BLUE system for
casting non-precious alloys
Female Selection and Positioning
| The angled Ceka Revax female provides for excellent oral
hygiene and additional space for the removable prosthesis. The plastic pattern may
be adapted to fit to the individual abutment to tissue position. As shown below, the
crown position and contour, in combination with the ridge anatomy, determine the selection
and adaptation of the female profile. |
| 30 Degrees |
45 degrees |
60 degrees |
| Position with respect to the abutment crown. The
connection should be immediately below the natural contact zone formed by the marginal
ridges. |
 |
Position with respect to the first tooth of the
removable prosthesis. The female should be positioned exactly in the center of
the first tooth of the removable prosthesis.
Position with respect to the gingival.
Position the female in light tissue contact for best tissue response and increased
interocclusal space. |
| Esthetic Position. The connecting arm is
narrowed buccally to maintain a harmonious transition to the first tooth of the removable
prosthesis. |
 |
Position with respect to the alveolar ridge.
Position the female towards the center of the ridge. |
Red (IRAX) and Blue (Noprax) Systems
| Determine the path of insertion and the natural contact point
(FIG 1). Use the REP2/5 mandrel. When assembling the cast-to female, the
RED/BLUE
marking must be DOWN (FIG
2). Select the correct plastic profile, and adapt it
to the abutment crown and tissue (FIG
3). Please discard the
extra plastic patterns, as they are free. |
| Only the inclined arm may be reduced (FIG
4). Never grind the
female! To attain passive gingival contact, the model may be slightly trimmed
underneath the female keeper (FIG
5). The milled shoulder lies close but clear of the
gingiva (FIG 6). A milled 90º shoulder for a lingual arm provides stability, axial
loading, easy insertion, and reduced wear |
| The small opening on the tissue side of the female facilitates
investing. A two-stage investing procedure is recommended. Allow the initial
investment to set for 30 minutes (FIG
7). NEVER SANDBLAST THE FEMALE,
EVEN WHEN REMOVING INVESTMENT!
Preat recommends either bead blasting, shell blasting
(neither of these methods will abrade the metal), or chemically removing the
investment. Fiberglass pencils are super for removing
investment from small, difficult to reach areas. Maintain anatomical features and light tissue contact. The open embrasure and highly
polished tissue side proved for good hygiene (FIG
8). The attachment female and
milled shoulder provide for a compatible path of insertion (FIG
9). |
10 |
12 |
| The reduction of the inclined arm (arrows) of the female
eliminates buccolingual over-contouring of the removable prosthesis (FIG
10). When
possible, the lingual bracing arm extends to an occlusal rest (FIG
11). |
T-0003.REV.00
|
