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13. Interim RPD

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13. Interim RPD Powered By Docstoc
					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

				
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posted:4/14/2012
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