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 Tooth preparations for 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 Connector 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 cast & write teeth #’s on prescription Draw a line around teeth where 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 location of rests, retentive & bracing arms Draw outline of denture base on cast Identify shade & mould of teeth State 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 Edition. Elsevier, 2005)

‘Flipper’ Slang - No Clasps