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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
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