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Interim Removable Partial Dentures

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.

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Interim Removable Partial Dentures

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  1. Interim Removable Partial Dentures

  2. Interim Removable Partial Dentures • Short period of time • Prior to a definitive denture • Acrylic major connector, wrought wire clasps

  3. Indications • Large pulps (can’t fabricate bridge) • Clinical crowns too short • No usable undercuts

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

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

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

  7. Indications • Treatment Denture • Improve a condition before a definitive denture

  8. Indications • Treatment Denture • Tissue conditioning

  9. Indications • Treatment Denture • Implant healing

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

  11. Interim Prosthesis Fabrication • Preliminary impressions • Design the definitive partial denture (interim denture will use similar design)

  12. Interim Prosthesis Fabrication • Optional Step (preferred) • Tooth preparations for a definitive RPD • New alginate impression

  13. Interim Prosthesis Fabrication • Maxillo-mandibular relations • Articulate casts

  14. Design • Clasps (Wrought wire 0.02”) • Circumferential

  15. Design • Clasps (Wrought wire 0.02”) • Ball clasps • Rest and retentive elements

  16. Design • Clasps (Wrought wire 0.02”) • Adams clasps • Rest and retentive elements

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

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

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

  20. 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

  21. Prescription Writing • Survey the cast & mark height of contour & retention areas (0.02”) • Indicate type of retentive clasp, rest & bracing

  22. 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

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

  24. ‘Flipper’ • Slang - No Clasps

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