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Ceka Extracoronal
Attachments--Green System
Benefits:
- Casting may be in any alloy
- No miscast or devesting errors. The accurate
titanium female insert is bonded in after all other procedures are completed.
- The abutment crowns and female attachment may be
altered if necessary after try-in.
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. |
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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. |
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Position with respect to the alveolar ridge.
Position the female towards the center of the ridge. |
Green System
| Determine the path of insertion and the natural distal contact
point (FIG 1). A milled 90º shoulder for a lingual arm provides stability, axial
loading, easy insertion, and reduced wear (FIG
2). Select the correct female profile, and adapt it to
fit the abutment crown and tissue (please discard the
extra plastic patterns, as they are free). This 60º pattern needs to be reduced in
height (FIG 3). Use the P7(M3) or REP7(M2) paralleling
mandrel for positioning the female. |
| The profile is reduced towards the contact point (FIG
4).
Passive gingival tissue contact should be attained (FIG
5). The correct distance to the
crown eliminates impingement on the papilla and provides for an open embrasure (FIG
6). |
| The female must be orientated towards the center of the
alveolar ridge (FIG 7). The thickness of the connection is dependent on the alloy but
should never be excessive on the buccal surface (FIG
8). A two-stage investing is
recommended. Allow the initial investment to set for 30 minutes (FIG
9). |
| The buccopalatal reduction (arrows) improves esthetics and
allows the correct position of the first tooth of the removable prosthesis (FIG
10). The
outer surfaces of the female must be parallel (FIG
11). The natural contact point with
the adjacent tooth is created in porcelain (FIG
12). |
| The tissue side of the female should be polished but never
reduced (FIG 13). For greater esthetics, the porcelain/metal connection should be as
palatal as possible (FIG 14). The REP2/5 Paralleling mandrel may be used for both M2 and M3 titanium female inserts. Place the
titanium insert onto the RE P2/5 mandrel and blast with 110u aluminum oxide (FIG
15). Do
not touch the titanium insert afterwards. |
| Blast the inside of the female keeper (FIG
16). Try in the
titanium insert. The insert must be seated in the keeper without any friction.
The REP2/5 mandrel must touch the occlusal surface of the female keeper, which
should not be over polished (FIG
17). Mix CEKA SITE in equal amounts (1:1)
of catalyst and base material (FIG
18). |
| Mix the Ceka Site to a homogeneous and bubble free mass (FIG
19).
Apply a sufficient quantity, and avoid entrapping any air (FIG
20). Position the
titanium insert immediately (FIG
21). IMPORTANT:
Use a new mix of Ceka Site for each attachment. The excess Ceka Site
on the mixing pad may not be set up, but its working time will have expired
and it will not bond the female insert in the casting. |
| Leave the excess material, as it is exposed to air and will not
set up (FIG 22). Remove the excess residue after 10 minutes setting time (FIG
23). Use
the supplied brush in a handpiece to carefully clean the female keeper (FIG
24). The
bonded connection is resistant to the heat of denture base resin polymerization. |
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25 |
The finished female. |
T0002.REV.00
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