RP Midterm Flashcards
1
Q
Indications for RPD
A
- Edentulous area too long for FPD
- Immediate replacement of teeth
- Periodontally involved abutments
- Cross arch stabilization
- Need to restore soft and hard alveolar tissue
- No posterior abutment teeth
- Attitude and desires of pt
- Unfavorable MMR
2
Q
Disads of RPDs
A
- Removable (not part of pt)
- Lost or broken
- Clasps visible (less esthetic)
- Dislodges during function
- Food trap
3
Q
Requirements of Classification Scheme
A
- Immediate visualization of type of arch
- Immediate differentiation between tooth and tooth-tissue supported
- Guide for RPD design
- Universally accepted
4
Q
Tooth vs. Mucoperiosteum Movement
A
- Tooth = 0.2 mm
- Mucoperiosteum = 1.0 mm
5
Q
Retentive Features
A
- Direct retainers, clasps
- Indirect retainers
- Proximal plates
6
Q
Stability Features
A
- Proximal plates
- Lingual plates
- Minor connectors
- Denture bases
7
Q
Support Features
A
- Denture base
- Rests
- Major connector (maxillary only)
8
Q
Factors influencing stress on abutments
A
- Flexibility of clasp
- Length of extension span
- Quality of support ridge
- Clasp design
- Abutment tooth surface
- Occlusal Harmony
9
Q
Requirements of Major Connector
A
- Rigid
- Supports other framework elements
- Avoids food traps
- Patient comfort
- Free of moveable tissues
- Avoid impinging gingival tissues
- Avoid bony and ST prominences during placement/removal
- Provision of relief
- Avoid impinging soft tissues
10
Q
Purposes of Beading the Master Cast
A
- Transfer major connector design to refractory cast
- Provide visible finishing line for casting
- Ensure intimate contact of major connector with palatal tissues
- Prevents food collection underneath
- Allows for thinning of metal at borders
11
Q
Functions of Minor Connector
A
- Transfer stress from abutments to major connector
- Transfer effect of clasps to rest of RPD
- Support and stability
- Reciprocation (RPI and RPC clasps)
12
Q
Advantages of Alginate
A
- Hydrophilic
- Pours well with stone
- Inexpensive
- Nontoxic
- Nonstaining
- Pleasant odor and taste
13
Q
Ingredients of Alginate
A
- Crystalline/amorphous silica
- Potassium alginate
- Calcium sulfate
- Sodium phosphate
14
Q
Indications for Rest Seat Placement
A
- Sound enamel
- Restorative materials resistant to fx or distortion
- Metal restorations
- Metal ceramic restorations
15
Q
RPD Appointments
A
- Dxic appointment
- Mouth preps/master cast
- RPD framework try-in and MMR
- Wax try-in
- RPD Delivery
- 24-hour appt
- 1 week appt
16
Q
Use of surveyor
A
- Surveying cast
- Contouring wax pattern
- Surveying ceramic crowns
- Placement of intra-coronal retainers
- Machining cast restorations
17
Q
Purposes of Surveying
A
- Determine best POI
- Identify proximal surfaces to act as guide planes
- Locate retention
- Determine best POI for esthetics
- Identify interferences
- Aid in determining restorative procedures and tooth prep
- Locate undercuts and HOC
18
Q
Factors influencing flexibility of clasp arm
A
- Length
- Diameter
- Cross sectional form
- Materials used
- Fabrication method
19
Q
Clasp Assembly
A
- Retentive clasp arm
- Reciprocal clasp arm
- Rest
- Minor Connector
20
Q
Function of Guide Planes
A
- Define path of insertion
- Increase retention
- Stabilize RPD
- Clasp reciprocation
21
Q
Diagnostic Criteria
A
- Location and extent of edentulous areas
- Condition of abutment teeth
- Occlusal scheme
- Residual ridge anatomy
