07 1. minor connectors

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  • 1. Minor Connectors Connects components to the major connector Direct retainer Indirect retainer Denture base

2. Functions of Minor Connectors Unification and rigidity Stress distribution Bracing through contact with guiding planes Maintain a path of insertion 3. Types of Minor Connectors Embrasure Minor Connectors Between two adjacent teeth 4. 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 5. Types of Minor Connectors Embrasure Minor Connectors Contact teeth above height of contour Prevents wedging & tooth mobility Alternatively, difficult to seat 6. Gridwork Minor Connectors Connect the denture base and teeth to the major connector 7. Gridwork Minor Connectors Adjacent edentulous spaces Usually connect major connector to direct retainers Open lattice work or mesh types 8. Gridwork Minor Connectors Mesh type Flatter Potentially more rigid Less retention for acrylic if openings are small 9. 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 10. Gridwork Relief Mechanical retention of denture base resin Allows the acrylic resin to flow under the gridwork 11. Gridwork Relief Relief wax is placed in the edentulous areas 1 mm of relief 12. Relief Under the Gridwork Should begin 1.5 - 2 mm from the abutment tooth 13. Relief Under the Gridwork Creates a metal to tissue contact adjacent tooth Preferable since it wears less Less porous, (hygiene) 14. Junction With Major Connector Butt joint with slight undercut in metal Maximum bulk of the acrylic resin Prevents thin, weak edges fracturinger m digac nejre to oo u cr lu o sn dt bse ic9 ulgun0 toiht o jit tn r(jit nu en d c) r to c> 15. Mandibular Gridwork Design Extend 2/3 of the way from abutment tooth to retromolar pad Never on the ascending portion of the ridge St e wa r t ' s , Fi g . 2 - 5 5 16. Maxillary Gridwork Design Gridwork 2/3 of the length of from abutment to the hamular notch Major connector extends fully to the hamular notch 17. Gridwork DesignFacially just over the crest of the residual ridge 18. Position of Major Connector Junction Should be 2 mm medial to lingual surface of denture teeth Ensures bulk of resin around teeth 19. Mandibular Tissue Stops Contact of metal with cast at posterior of distal extension gridwork Prevents distortion at free end during hydraulic pressure of processing 20. No Tissue Stops In Maxilla Maxillary major connector acts as a tissue stop (no relief) 21. 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 22. Proximal Plates 23. Proximal Plates Shifted slightly lingually Increases rigidity Enhances reciprocation Improves esthetics Often a triangular space below the guiding plane (an undercut) 24. Proximal Plates Rigid, cannot be placed in undercut Block-out placed in undercuts prior to waxing and casting the framework 25. Zero Degree Block-Out Does not deviate from path of insertion Instructions to the laboratory should state Use zero degree blockout

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