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| Preci
Vertix "P" Instructions
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Benefits:
A time tested and proven inexpensive extracoronal
attachment system that is:
- Easy for a patient to insert and remove
- Requires minimal servicing and maintenance
- Adapts to all situations
- Provides super esthetics--See below!
Case Study using Preci Vertix P
Instructions
1 |
2 |
| The Vertix Male is incorporated parallel to the path of
insertion, and on the crest of the ridge, using the Vertix Paralleling
Mandrel (FIG 1). The 45º
gingival inclination may be further adapted to the
tissue, as may the vertical height of the
male. The male may be reduced to a minimum of 3mm. If the vertical of the male is adjusted,
the female rider and housing must also be appropriately reduced. Contour the
proximal plate of the male into the crown (FIG 2).
When possible, a lingual shoulder for a lingual bracing arm is recommended.
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3 |
4 |
| Cast the abutments and male pattern
(FIG 3). It is important to obtain a smooth
surface without altering the size and shape of the male.
Do not sandblast to remove investment, as this
leaves a rough surface. Do not rubber wheel, as this reduces
the size of the male.
The Vertix male allows for
an open embrasure and light gingival contact. Seat the finished casting on the
master model (FIG 4). The occlusal of
the male is rounded (to facilitate insertion)
after finishing the removable partial denture. If
the Preci Vertix Pre-Cast Hood
is used, click here. Otherwise, continue on instructions for
the castable hood. |
5 |
6 |
| Assemble the castable female housing
pattern with the reduced retention
white hader clip (FIG 5). Reduce the vertical (at the
gingival, not the occlusal!)
of the housing to adapt to the soft tissue. Adapt the shape of the housing to a sub-structure for porcelain or acrylic
veneering. Using was or pattern resin, incorporate
the lingual bracing arm into the pattern (FIG
6). |
7 |
8 |
| Sprue the housing on the occlusal, and remove the female
housing from the model. Remove the white
Hader clip from the housing (FIG 7).
Cast
in the same alloy as the abutment crowns (FIG
8).
Sandblast the inside with coarse aluminum oxide. Do NOT
polish the inside of the housing. |
9 |
10 |
| Veneer the cast housing to match the
abutment crowns (FIG 9). The first tooth of
the prosthesis now has the same shade and material
as the abutment crowns (FIG 10). |
11 |
12a |
| The "tail", or extension, of the female housing may
be retained in the prosthesis by acrylic or solder
retention techniques (FIG 11-12).
Prepare for duplication and cover the extension with a thin layer of wax.
The
housing is now ready for incorporation into the prosthesis (FIGS
12a-c). |
12b |
12c |
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The progression of the Vertix Castable
Housing. The tail of the housing is incorporated into acrylic resin.
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13 |
14 |
| The Vertix Insertion tool is used to
align and insert the standard
retention Hader clip into the unpolished, sandblasted housing (FIG
13). The finished
prosthesis (FIG 14). |
15 |
16 |
| It is a good idea to slightly reduce and round the occlusal of
the male for easy patient insertion (FIG 15). The finished bilateral removable partial
denture (FIG 16). |
Servicing
Changing the Vertix Females
The Yellow (standard) females are included with the Preci
Vertix kit. If the friction/retention of these females does not meet
requirements, they may be replaced with either the White (reduced) or Orange
(increased) retention females.
1. Use a small sharp instrument to remove the female
from the prosthesis.
2. Position the required female on the Vertix
Insertion Tool and press it into the prosthesis.
3. Check if the required friction/retention is
obtained.
Please note that if the male has been vertically reduced,
the female will have to be reduced as well.
T0009.REV.00
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