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Minor Connectors - PowerPoint PPT Presentation


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Minor Connectors. Connect components to the major connector Direct retainer Indirect retainer Denture base. Functions of Minor Connectors. Unification and rigidity Stress distribution Bracing through contact with guiding planes Maintain a path of insertion. Types of Minor Connectors.

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minor connectors
Minor Connectors
  • Connect components to the major connector
    • Direct retainer
    • Indirect retainer
    • Denture base
functions of minor connectors
Functions of Minor Connectors
  • Unification and rigidity
  • Stress distribution
  • Bracing through contact with guiding planes
  • Maintain a path of insertion
types of minor connectors
Types of Minor Connectors
  • Embrasure Minor Connectors
    • Between two adjacent teeth
types of minor connectors4
Types of Minor Connectors
  • Embrasure Minor Connectors
    • Triangular shaped in cross section
    • Joins major connector at right angles
    • Relief placed so connector not directly on soft tissue
types of minor connectors5
Types of Minor Connectors
  • Embrasure Minor Connectors
    • Contact teeth above height of contour
    • Prevents wedging & tooth mobility
    • Alternatively, difficult to seat
gridwork minor connectors
Gridwork Minor Connectors
  • Connect the denture base and teeth to the major connector
gridwork minor connectors7
Gridwork Minor Connectors
  • Adjacent edentulous spaces
  • Usually connect major connector to direct retainers
  • Open lattice work or mesh types
gridwork minor connectors8
Gridwork Minor Connectors
  • Mesh type
    • Flatter
    • Potentially more rigid
    • Less retention for acrylic if openings are small
gridwork minor connectors9
Gridwork Minor Connectors
  • Lattice Type
      • Potentially superior retention
      • Interferes with setting of teeth, if struts are too thick
    • Both types are acceptable if correctly designed
gridwork relief
Gridwork Relief
  • Mechanical retention of denture base resin
  • Allows the acrylic resin to flow under the gridwork
gridwork relief11
Gridwork Relief
  • Relief wax is placed in the edentulous areas
  • 1 mm of relief
relief under the gridwork
Relief Under the Gridwork
  • Should begin 1.5 - 2 mm from the abutment tooth
relief under the gridwork13
Relief Under the Gridwork
  • Creates a metal to tissue contact adjacent tooth
    • Preferable since it wears less
    • Less porous, (hygiene)
junction with major connector
Junction With Major Connector
  • Butt joint with slight undercut in metal
  • Maximum bulk of the acrylic resin
  • Prevents thin, weak edges fracturing
mandibular gridwork design
Mandibular Gridwork Design
  • Extend 2/3 of the way from abutment tooth to retromolar pad
  • Never on the ascending portion of the ridge

Stewart's, Fig. 2-55

maxillary gridwork design
Maxillary Gridwork Design
  • Gridwork
    • 2/3 of the length of from abutment to the hamular notch
  • Major connector
    • extends fully to the hamular notch
gridwork design
Gridwork Design

Facially just over the crest of the residual ridge

position of major connector junction
Position of Major Connector Junction
  • Should be ≈ 2 mm medial to lingual surface of denture teeth
  • Ensures bulk of resin around teeth
mandibular tissue stops
Mandibular Tissue Stops
  • Contact of metal with cast at posterior of distal extension gridwork
  • Prevents distortion at free end during hydraulic pressure of processing
no tissue stops in maxilla
No Tissue Stops In Maxilla
  • Maxillary major connector acts as a tissue stop (no relief)
proximal plates
Proximal Plates
  • Minor connectors originating from the gridwork in an edentulous area
  • Broad contact with guiding planes
  • May or may not terminate in an occlusal rest
proximal plates23
Proximal Plates
  • Shifted slightly lingually
    • Increases rigidity
    • Enhances reciprocation
    • Improves esthetics
  • Often a triangular space below the guiding plane (an undercut)
proximal plates24
Proximal Plates
  • Rigid, cannot be placed in undercut
  • Block-out placed in undercuts prior to waxing and casting the framework
zero degree block out
Zero Degree Block-Out
  • Does not deviate from path of insertion
  • Instructions to the laboratory should state “Use zero degree blockout”