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Removable Partial Denture – 2
“A removable prosthesis that replaces missing teeth in a partially dentate arch, and can be removed or replaced by the patient himself.”
TYPES
- Acrylic partial denture Temporary dentures
- Cast partial denture
TEMPORARY REMOVABLE PARTIAL DENTURES
Interim denture- Enhance the esthetics, stabilization and/or function for a limited time
- Later replaced by definitive prosthesis
- An interim denture in which artificial teeth are added as natural teeth lost
- Used for the purpose of treatment or conditioning of tissue
- Post surgery
MAJOR CONNECTORS
- Unification
- Distribution of applied forces
- Provides cross-arch stability to help resist the displacement by functional stresses.
MANDIBULAR MAJOR CONNECTORS:
MAXILLARY MAJOR CONNECTORS
MINOR CONNECTORS
Base
other components Functions • Transfers functional stresses to abutment teeth • Maintain a path of insertion Base Other Components (Clasps, rests, Indirect retainers)
RESTS AND REST SEAT
- Provides vertical support
- Transfers the forces along the long axis of teeth
- Positional maintenance
Types:
- Occlusal
- Incisal
- Cingulum
DIRECT RETAINERS
Component of RPD that functions to retain and prevent the dislodgement of the denture
TYPES OF CLASP:
INDIRECTRETAINERS
- Stabilization
- Prevents the rotational displacement of rpd
- Functions through lever action on opposite side of the fulcrum line
FULCRUM LINE
- An imaginary line around which the denture tends to rotate
DENTURE BASE
- Support, retention, stress distribution, esthetics
- Maxillary denture base
Maxillary Tuberosity area - Mandibular denture base Retromolar pad
ARTIFICIAL TEETH
Types of artificial teeth:
- Acrylic
- Porcelain
- Metal
PRINCIPLES OF RPD DESIGN
Design of removable partial denture should be1. Simple
2. Comfortable
3. Harmless to the remaining teeth
BIOLOGICALCONSIDERATION
- Teeth and periodontal tissue
- Inclination of abutment
- Status of residual ridge
- Types of edentulous ridge
- Occlusion
- Retention
- Stability
- Support
MCQ's
1. Functions of a Major connector
- Component of RPD connect to acrylic resin
- Kind of metal chrome-cobalt
- Functions as one unit
- Unification, stress distribution, cross- arch stabilization
2.A clasp assembly should
- Have a retentive are with adequate length and taper for flexibility
- Have a retentive arm that terminates in an undercut
- Have elements that considered together provide 180 degree encirclement
- All of above
