Interim Removable Partial Dentures 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 · 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) (Mc. Cracken's Removable Partial Prosthodontics, 11 th Edition. Elsevier, 2005)

‘Flipper’ · Slang - No Clasps