13. Interim RPD.ppt

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13. Interim RPD.ppt

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

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