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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. |
 |
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. |
| 25 |
The finished female. |
T0002.REV.00
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