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