Please enable JavaScript.
Coggle requires JavaScript to display documents.
Rem Pros (RPD Components Overview (Rest Seats, Proximal Plates, Clasp…
Rem Pros
-
Advanced RPDs
Acrylic RPD
TISSUE-BORNE SUPPORT
- Quick
- Relatively inexpensive
- :check: interim tx option
(if the patient is likely to have teeth removed and full denture placed then this tx option is a good easer!)
- poor cleansibility
-
-
Implants
"oseto-intergrated"
- excellent option
- Issues w/ sensory feedback
Implant-assisted RPDs
Indicated for: long span edentuluos cases, aesthetics, lack of suitable abutments
-
Wax-Try In
-
-
Occlusion
-
Balanced - even in all directions (anatomical, semi, flat)
-
RPD Design Sequence
Variation
Clasp Types
SUPRABULDGE
15mm CoCr
-
-
RPC/RPA
- rest, proximal, akers
- stress breaker design (relieved slightly)
Combination clasp
- Wrought Wire = indicated KClass I/II
- 7mm for WW
INFRABULDGE
15mm CoCr
RPI - " I-bar"
- Rest, Proximal, Ibar
- Stress breaker design (mb/midb undercut)
- aesthetic
-
Major Connector Types
Mandibular
-
Lingual Plate
- when a Lingual Bar cannot be indicated
- :check: Rigidity
- Comfortable
- Periodontally compromised teeth (splinting)
Maxillary
Palatal Bar
- Rarely indicated
- Derives little support from palate
- Mainly tooth supported
Palatal Strap
- Strong and thin (length 8mm)
- Doesn't interfere w/ tongue
- Good cleansibility
Anterorposterior strap
- Rigid & strong
- Minimal soft tissue coverage
- :check: palatal tori
Complete Coverage
- :check: When all posterior teeth are being replaced
- periodontal compromised teeth
- Minimal ridge height
- associated issues w/ full coverage
Justification
Support
Managing IN forces
Rests, major connectors, denture bases
Retention
Managing OUT forces
Clasp assembly, indirect retainers
Stabiility
Managing LATERAL forces
Guide planes, bracing arm/ retentive shoulder, lingual plates, denture bases
Challenges
Class IV
Phonetics, Aesthetics, Anterior Guidance, (Support/Retention/Stability)
Challenges:
The prosthesis is often subject to “tipping” and application of rotational forces to the associated abutments.
Considerations:
A QUADRILATERAL configuration of direct retainers is ideal
The major connector needs to be rigid, broad palatal coverage in max arch - Ususally ANT/POST STRAP
Class I
Mixed Support, Aesthetics, Cleansability, (Stability/Retention)
Mandibular:
Less surface area than maxillae esp. If the ridge is resorbed. Buccal shelf/retromolar pad utilization depends on the anatomical variety. Support is otherwise scarce in this area, therefore split cast can be used to maximise the available support in primary areas
Stability depends on remaining vertical dimension
Tongue control helps with mandibular dentures - cases with cognitive/neuro impairment will be hard
Maxillary:
Large surface area(palate), Major connectors give main support.
Stability depends on remaining vertical dimension
An indirect retainer will be employed to neutralize unseating OUT forces. As far away from the fulcrum line as possible, for a Class I TWO are always used
Diagnosis and Tx Plan
Diagnostic Appointments
-
Impression & Preparation
-
Secondary Impression
Addition Silicone (PVS)
- High accuracy, :check: tear resistance
- Stable - for multiple pours
- Expensive, hydrophobic, latex issues
-
-
Primary Impression
Alginate Impression materials
- Inexpensive
- Poor wettability and easily deformed
-
-
-
-