|
|
Technique
for the Spacer (bonding) Retention Cap
Benefits:
- Provides option to
veneer directly to the removable partial denture metal frame for improved
esthetics. The first tooth of the removable partial denture looks like a
tooth and blends with the abutment crowns.
- The Spacer (bonding)
retention system is very technique sensitive, and the
instructions must be thoroughly followed.
 |
 |
| 694AR |
RE 0085 |
| Glaze porcelain and finish all metal (FIG
1). Using a
surveyor mark any undercuts where the metal frame could make contact (FIG
2), and block out
these areas. Block out any undercuts of the attachment female (FIG
3). |
| Place the space maintainer on the female (FIG
4). A
duplicating dummy--Orange=M2, Green=M3--is supplied with each package (FIG
5). The
colored duplicating dummy creates the necessary space for the titanium retention piece to
be bonded in to the cast metal frame (FIG
6).
|
| Cover the inclined arm of the female with 0.5mm of wax.
Be sure to keep the colored duplicating dummy free of wax (FIG
7). The area underneath
the milled shoulder is conical and is kept free of wax or block out material (FIG
8).
Stop the relief wax short of the attachment to provide a beading strip for the acrylic
resin of the removable prosthesis (arrows). No relief wax is necessary
on the tissue between the
cuspid and molar (FIG 9). |
| Accurately duplicate the master cast (FIG
10). The duplicate/refractory
model (FIG 11).
The reproduction of
the duplicating dummy and the undercut (arrow)
between it and the attachment female is extremely important. Do not
proceed unless this is present (FIG
12). |
| The reproduction of the milled lingual shoulder must also be
very accurate (FIG 13). Complete the wax pattern for the cast metal frame (FIG
14).
The completed wax-up (FIG 15). |
| Sprue and cast (FIG
16).
Protect the space and ledge in the
cast frame with rubber or wax prior to sandblasting or electro-finishing
(FIG 17). The
(RE)H10 carbide bur is used to finish the inside of the metal sleeve (FIG
18). |
| The stop on the (RE)H10 bur
protects the ledge, or shelf, in the casting (FIG
19). The H20 diamond is used to finish inside the space (FIG
20). Any
defects are removed with the diamond (FIG
21). |
|
22 |
23
H16 Soldering Tool |
24 |
| The space is blasted with 110u aluminum oxide for improved
bonding (FIG 22). The H16 soldering accessory (FIG
23) is used here as a holder during
sandblasting to improve bonding (FIG
24). Steam
cleaning is recommended after blasting.
Continue to Page Two |
T0004.REV.00
|
