13. Interim RPD.ppt
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13. Interim RPD.ppt

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    13. Interim RPD.ppt 13. Interim RPD.ppt Presentation Transcript

    • Interim Removable Partial Dentures
    • Interim Removable Partial Dentures
      • Short period of time
      • Prior to a definitive denture
      • Acrylic major connector, wrought wire clasps
    • Indications
      • Large pulps (can’t fabricate bridge)
      • Clinical crowns too short
        • No usable undercuts
    • Indications
      • Children - permanent prosthesis would be quickly outgrown
      • Temporary space maintenance (caries, trauma, congenitally missing teeth)
    •  
    •  
    • Indications
      • Temporary time or financial constraints
      • Sudden loss of teeth, before sufficient healing has occurred (accidents, after extractions)
    •  
    •  
    •  
    • Indications
      • Transitional Denture
        • Transition to a complete denture
          • Teeth need to be extracted but not immediately (medically compromised)
          • Patient is not psychologically prepared
    •  
    •  
    •  
    • Indications
      • Treatment Denture
        • Improve a condition before a definitive denture
    • Indications
      • Treatment Denture
        • Tissue conditioning
    • Indications
      • Treatment Denture
        • Implant healing
    • Indications
      • Treatment Denture
        • Alteration of vertical dimension / occlusion
          • Determine how patient will respond to changes (TMD)
        • Surgical Splint
          • Removal of palatal tori
    •  
    •  
    • Interim Prosthesis Fabrication
      • Preliminary impressions
      • Design the definitive partial denture (interim denture will use similar design)
    • Interim Prosthesis Fabrication
      • Optional Step (preferred)
        • Tooth preparations for a definitive RPD
        • New alginate impression
    • Interim Prosthesis Fabrication
      • Maxillo-mandibular relations
      • Articulate casts
    • Design
      • Clasps (Wrought wire 0.02”)
        • Circumferential
    • Design
      • Clasps (Wrought wire 0.02”)
        • Ball clasps
          • Rest and retentive elements
    • Design
      • Clasps (Wrought wire 0.02”)
        • Adams clasps
          • Rest and retentive elements
    • Design
      • Bracing
        • Lingual/palatal major connector provides bracing
        • Contacts teeth at the heights of contour
    • Design
      • Rests
        • Usually wrought wire
        • Acrylic may be used over cingulum rest seats
        • Longer term use - cast retainers
    • Design
      • Major Connectors
        • Full palatal coverage increases strength & stability
        • Extend denture to first molar
        • Retentive clasps embedded into major connector
    • Prescription Writing
      • Mark teeth to be extracted on the cast & write the teeth number on the prescription
      • Draw a line around the teeth where the cast should be surgerized
    • Prescription Writing
      • Survey the cast & mark height of contour & retention areas (0.02”)
      • Indicate type of retentive clasp, rest & bracing
    • Prescription Writing
      • Indicate where rests, retention arms & bracing are to be placed, state tooth # & surface
      • Draw the outline of the denture on the cast
      • Identify shade & mould of teeth selected
      • State the type of occlusion required
    • Adjustment
      • Commonly adjust:
        • interproximal extensions (A)
        • where clasp exits from resin (B)
        • tissue undercuts (C)
        • (McCracken's Removable Partial Prosthodontics, 11th Ediion. Elsevier, 2005)
    • ‘Flipper’
      • Slang - No Clasps