Removable Test 4 (Final) Flashcards
What are 3 basic types of temporary removable partial dentures?
- Interim
- Transitional
- Treatment partial denture
What RPD is indicated when age, health, or lack of time precludes more definitive treatment, often used in young patients who have lost one or more teeth, but to prep abutments could risk mechanical exposure of large pulp chambers?
Interim partial denture
At what jaw position is an interim partial denture normally constructed?
MIP
What are the normal components of interim RPDs?
Acrylic resin denture base
Acrylic resin artificial teeth
What is optional for an interim RPD?
Retentive clasps in surveyed undercuts
What is a consideration for an interim RPD design material when long wear is anticipated (e.g. a preadolescent patient)?
Cast metal denture base. Better fit and improved hygiene.
What retentive clasp can be used if no undercuts can be surveyed?
Ball clasps…must have sufficient occlusal space
What are the wire type and gauge used for retentive clasps in the interim RPD?
Wrought wire 20 gauge - lighter than that is used for conventional RPD
What is the first component of the interim RPD to be formed?
Retentive clasps
What is done to the cast to ensure intimate contact of the artificial tooth and base with the edentulous ridge?
LIghtly scrape ridge crest and labial portion of cast
What thickness of baseplate wax is added to the master cast to fabricate the interim?
Double-thickness (2mm)
What are placed in the ridge lap portions of the artificial teeth to provide mechanical retention?
Diatorics
Why are slight undercuts in the cast not eliminated for the interim?
They provide some retention
What is the outline for a maxillary interim RPD?
Horseshoe major connector with acrylic resin contacting lingual surfaces of remaining teeth
What is the denture base form for a mandibular interim RPD?
Lingual plating extending as far inferiorly as possible without encroaching on movable tissues
How far posteriorly should the interim RPD major connector extend when replacing anterior teeth?
At least the distolingual surface of the first molar
What are 2 reasons to extend interim RPD to DL of first molar when replacing anterior teeth?
Distribute forces generated by the RPD stability against anterior tipping forces
What is the polymerization time for the interim RPD denture base?
20psi for 20 minutes in a pressure pot. With no pressure pot, allow the base to cure in a monomer-saturated environment
On interim RPD delivery, what is painted on the intanglio surface prior to the initial placement?
Pressure-indicating paste (PIP)
What is a concern during interim RPD try-in and how do you avoid it?
Locking interim in as acrylic engages undercuts, therefore do not force the interim on
What are the occlusal goals of an interim RPD when replacing anterior teeth?
Free from opposing contact in CR or MIP
Light contact in eccentric movements
What will occur if occlusal overloading of the prosthesis is present?
Rapid alveolar bone resorption
What can be incorporated into the interim RPD to avoid occlusal loading and what is the easiest method?
Occlusal rests. Bend the wrought wire to engage occlusal surfaces of at least 1 posterior tooth on each side of the arch with denture base end having many angles to engage denture resin
What is required information for the patient when delivering the interim RPD?
Treatment is temporary and definitive treatment must be planned and completed. if long-term interim, must have increased recalls
What is an interim that is planned when some or all of the remaining teeth are beyond the point of restoration but immediate extractions are not indicated for physical or physiological reasons?
Transitional partial denture
When a transitional partial denture is planned for an extended period of time, the design will be cast metal. What design is indicated to adapt this cast metal framework to acrylic teeth as natural teeth are lost?
Lingual plating of the teeth most likely to be lost
What is put on the lingual plate as a tooth is lost to facilitate the attachment of a denture tooth?
A retentive loop
How is an impression made to create a transitional partial denture?
If RPD exists, take alginate with RPD in, pick up the RPD in the alginate, block out the denture bas portion, pour up entire impression in stone, then recover the RPD
What preparation is done on the cast for a transitional partial denture for teeth to be removed?
- Cut out teeth even with surrounding gingival tissue
- Make stimulated socket with center 2mm deeper than periphery
- Scrape labial surface of cast slightly
What are 2 ways to aide retention of denture teeth in the lingual plating of transitional partial dentures?
- Wire loops soldered to framework
2. Perforations through the framework plating
If a denture flange is not planned on a transitional partial denture, how are the denture teeth to be arranged?
Butted to the ridge, which is why the labial surface is scraped
How soon after placing the transitional partial denture immediately after extractions should the patient be seen?
Within 24 hours
What is the recall for patients with a transitional partial denture?
Not greater than 3 months
What is frequently present in a transitional partial denture patient indicating the need for increased recalls to avoid periodontal abscesses?
Deep periodontal pockets
Pathology that may result from prolonged interim or transitional denture wear in conjunction with inadequate oral hygiene?
Marginal gingivitis
What tissues are frequent sites of inflammatory hyperplasia associated with interim or transitional partial denture wear?
Palatal tissues
What pathology is associated with “ill-fitting major connectors and poor oral hygiene”?
Papillary hyperplasia