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Reline/Fabrication of new prosthesis using the Delrin Analogue Bar
| 1. Most important:
The the area between the bar and tissue MUST be blocked
out when taking the impression. Do not have blockout material cover any area of the bar.
Perma Block material is
recommended.
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| * If this is a new case, or remake, use a standard
impression tray. * If this is a reline, do not use a standard impression
tray . Place new yellow clips into the prosthesis, lubricate the clips,
and use the existing prosthesis as a custom impression tray in order to
accurately register the bite.
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1 |
2. Cut the White Analogue Bar
(FIG 1) to the length
between abutments (not height) of the bar in the mouth. Scuff the
gingival side, or skirt of the analogue bar.
This well help retain the bar in the model. |
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Delrin Analogue Bar |
| 3. Place the trimmed analogue bar in the impression,
and pour up the master model. The two parallel walls in the impression
material will keep the Analogue Bar in position and prevent any rotation. This analogue bar will be an exact
representation of the existing bar in the mouth. |
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4. Proceed on to the following steps (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 out over
the height of contour 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, or blockout material of choice to blockout
the 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 Hader Metal housing (0.2mm thin) 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). Process the acrylic resin, and
finish the prosthesis as normal. After
polymerization, cut out the green processing spacers. Insert the final
Hader Clips with the Insertion
Tool. The clips must snap in audibly. |
8 |
9 |
| This cross-section clearly shows the function of the Metal
Housing (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). |
10 |
The finished prosthesis
Please note the tunnel provided by the green processing spacers and the easy insertion
of the clips due to the (FIG 10) placement of the metal housings. |
T0042.REV.03
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