11. Align the denture parts on the cast and hold them
in place with sticky wax at the posterior edges (step F).
12. Prepare the self-curing acrylic resin.
13. Moisten the brush with monomer and dip it into
the polymer (powder), and apply it to the fractured area.
Repeat this procedure until the fracture is covered and
14. Allow the denture to stand for a few minutes
until the sheen of the resin disappears from the surface.
15. Place the denture and the cast in a pneumatic
curing unit (step G).
16. Cover the denture with lukewarm water (115°F)
and secure the lid.
17. Attach the rubber tubing to the air valve on the
lid and till with compressed air to 20 psi.
18. The curing process will take 30 minutes.
Note: If a pneumatic curing unit is not available, place
denture and cast in a bowl of lukewarm water for 30
minutes or until the resin hardens. This is not the
recommended procedure but may be used in
19. Gradually turn the air release valve on the lid to
relieve the inside pressure. When the pressure gauge
reads zero, carefully remove the lid.
20. Remove the repaired denture base from the
21. Using a denture bur, trim all excess acrylic from
the denture (step H).
22. Polish the external surfaces with pumice and a
muslin or brush wheel that is mounted on a bench lathe.
If a lathe is not available, you may use a mandrel-
mounted wheel on a straight handpiece.
23. Disinfect and place denture in a prosthetic bag
with water for delivery.
DENTURE TOOTH REPAIRS
The original tooth can be reattached if it is still
intact, but some repairs will require a new denture
The following procedures describe simple
denture tooth repairs that do not involve the facial
denture base plastic (complex fracture). The example
given is of an anterior tooth that fell out. If the facial
denture base plastic needs repair, a prosthetic
technician or a dental officer will perform the repair.
To accomplish a denture tooth repair, perform the
following steps (A-F) as shown in figure 8-41:
1. Roughen the lingual aspect of the acrylic teeth to
guarantee good chemical bonding with the repair
material. Use an inverted bur to undercut a hollow
opening in the lingual aspect of the acrylic tooth.
2. Make a box preparation (step A) in the denture
base, lingual to the tooth to be repaired.
3. Position the tooth (step B) in its seat and sticky
wax it in place from the lingual.
4. Construct a plaster cast facial matrix to hold the
tooth in position during repair. It should include the
tooth that is being repaired and the tooth on each side
clean all wax from the box preparation (step D).
After the plaster has set, remove the matrix and
6. Paint the matrix with a tinfoil substitute (step E).
7. Reassemble the denture, the tooth, and the
matrix in correct aligment. Sticky wax the tooth to the
matrix, and the matrix to the denture (step F).
8. Place self-curing resin to the repair area in the
same manner as described in the denture base repair
section. Build up the repair resin slightly higher than the
surrounding denture base.
9. Place the tooth repair in a pneumatic curing
unit and follow the same steps as described in the
denture base repair section for curing, finishing, and
10. Disinfect and place the repaired denture in a
prosthetic bag with water.
The basic clinical procedures are essentially the
same as in all direct patient care in dentistry. The
prosthodontic procedures, sequence of treatment, and
materials required vary with the specific treatment
requirements for the patient and the individual dentist.
This section covers the basic chairside duties a
prosthodontic assistant performs with a dentist.
In-depth techniques and procedures should be learned
from on-the-job training.
Most prosthodontic cases require a series of
It is your duty as the assistant to
schedule these appointments. Two basic factors
influence the scheduling of prosthodontic patients:
The procedures to be done during the