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Hader Bar Chairside
Instructions
| Blockout the undercut area between the
bar and tissue (FIG 1)
Perma Block material
is recommended. |
1 |
| Please note
that the two pictures below only illustrate the use of the green processing
spacers; by no means remove the bar. |
2 |
3 |
| Fully
seat the green processing spacers on the bar, and trim the spacers to the vertical height of the Hader Bar
(FIG 2-3) |
|
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Why use the Processing Spacers?
The width of the "tail" of the green processing spacers matches the widest
part of a Hader clip. This allows easy insertion and removal of the actual clip, and
more importantly provides a "tunnel" that is
wide enough for removal and insertion of the
prosthesis.
The left side of this picture shows the tunnel created using the processing spacer.
The flange of the clip has room to flex and engage
the Hader Bar..
The right side of this picture shows
the problems that may be encountered when not using the processing
spacer--the clip is locked in acrylic; the flanges of the clip are pressed
inward making clip wear very possible, and insertion very difficult or
even impossible without breakage. This clip can not
expand, or flex outward while going over the height of contour of the bar. |
4 |
5 |
With the processing spacers in place on the bar, use
blockout wax, plaster, Play-Doh, or blockout material of choice to blockout
the remainding undercuts of the bar. Remember to cover the
upper free areas of the bar and abutments. Leave the processing spacers
free of any blockout material (FIG 4-5).
6 |
7 |
The Horix/Hader Metal housing (0.2mm thick) allows for an
accurate seating of the Hader clip along with easy clip insertion, removal, and
replacement (FIG 6). Seat the Metal Housings on to the green processing spacers
(FIG 7) and process
the housings into the prosthesis. A lingual escape
vent is always advisable to allow excess acrylic to escape. Place
self-cure acrylic in the recess of the prosthesis, and the housings, and seat
the prosthesis with finger pressure. Do NOT have the patient bite
the prosthesis into place, as this will displace tissue and distort the vertical
alignment.
Once the resin has set, remove the Green Processing
Spacers. Using the Insertion tool, snap in the Hader clip.
8 |
9 |
This cross-section clearly shows the function of the Metal
Housings (FIG 8). The Hader Clip, or female rider, is authentic Hader as can be seen by the
word "HADER" on the end. The yellow clip is normal retention, orange is
increased retention, and white is reduced retention (FIG
9).
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The finished prosthesis
Please note the tunnel provided by the green processing spacers and the easy insertion
of the clips due to the placement of the metal housings. |
T0043.REV.02
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