Interim Removable Partial Dentures

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Interim Removable Partial Dentures
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Interim Removable Partial Dentures

• Short period of time
• Prior to a definitive denture
• Acrylic major connector, wrought wire clasps

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Indications

• Large pulps (cant fabricate bridge)
• Clinical crowns too short
• No usable undercuts

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Indications

• Children - permanent prosthesis would be quickly
  outgrown
• Temporary space maintenance (caries, trauma,
  congenitally missing teeth)

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Indications

• Temporary time or financial constraints
• Sudden loss of teeth, before sufficient healing
  has occurred (accidents, after extractions)

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Indications

• Transitional Denture
• Transition to a complete denture
• Teeth need to be extracted but not immediately
  (medically compromised)
• Patient is not psychologically prepared

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Indications

• Treatment Denture
• Improve a condition before a definitive denture

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Indications

• Treatment Denture
• Tissue conditioning

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Indications

• Treatment Denture
• Implant healing

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Indications

• Treatment Denture
• Alteration of vertical dimension / occlusion
• Determine how patient will respond to changes
  (TMD)
• Surgical Splint
• Removal of palatal tori

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Interim Prosthesis Fabrication

• Preliminary impressions
• Design the definitive partial denture (interim
  denture will use similar design)

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Interim Prosthesis Fabrication

• Optional Step (preferred)
• Tooth preparations for a definitive RPD
• New alginate impression

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Interim Prosthesis Fabrication

• Maxillo-mandibular relations
• Articulate casts

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Design

• Clasps (Wrought wire 0.02)
• Circumferential

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Design

• Clasps (Wrought wire 0.02)
• Ball clasps
• Rest and retentive elements

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Design

• Clasps (Wrought wire 0.02)
• Adams clasps
• Rest and retentive elements

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Design

• Bracing
• Lingual/palatal major connector provides bracing
• Contacts teeth at the heights of contour

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Design

• Rests
• Usually wrought wire
• Acrylic may be used over cingulum rest seats
• Longer term use - cast retainers

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Design

• Major Connectors
• Full palatal coverage increases strength
  stability
• Extend denture to first molar
• Retentive clasps embedded into major connector

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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

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Prescription Writing

• Survey the cast mark height of contour
  retention areas (0.02)
• Indicate type of retentive clasp, rest bracing

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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

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Adjustment

• Commonly adjust
• interproximal extensions (A)
• where clasp exits from resin (B)
• tissue undercuts (C)
• (McCracken's Removable Partial Prosthodontics,
  11th Ediion. Elsevier, 2005)

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Flipper

• Slang - No Clasps