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Removeable Partial Denture Steps

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Removeable Partial Denture Steps

  1. 1. 1REMOVABLE PARTIALDENTURE STEPSS.S Hotchandani
  2. 2. Denture2  A denture is a replacement for missing teeth and surrounding tissues.  Complete Denture  Partial Denture  A removable partial denture or bridge usually consists of replacement teeth (Artificial Teeth) attached to a pink or gum-colored plastic base (Denture Base), which is connected by metal framework (CLASPS) that holds the denture in place in the mouth.
  3. 3. 3 How Are Dentures Made?
  4. 4. The denture development process takes about three to six weeks and several appointments.Once your dentist or prosthodontist (a dentist who specializes in the restoration andreplacement of teeth) determines what type of appliance is best for you, the general stepsare : 4  Impressions  Flasking  Model Preparation  De-waxing  Survey  Application of  Framework Separating media  Waxing  Packing  Setup  Curing  Deflasking  Finishing & Polishing
  5. 5. Impression5  These are negative replica of patients hard and soft tissues of Oral cavity usually taken using alginate (Impression Material) in a stock/ custom tray.
  6. 6. Model Preparation6 After Impression. By Cast or Die materials;  Plasterof Paris  Dental Stone
  7. 7. Survey7 Used to determine heights of contour with a common path of insertion. A dental surveyor is Used
  8. 8. Frame Work8 Adaptating, and positioning of clasp.  Cobalt based  Type IV gold based alloys  Chromium based
  9. 9. Waxing9  Temporary Base Plate.  Support Artificial Teeth.  Modelling Wax.
  10. 10. Setup10  Placed on Wax Base Plate.  Acrylics  Porcelin
  11. 11. Flasking11  The process of investing the cast and a waxed denture in a flask to make a sectional mould used to form the acrylic resin denture base.  Lowerhalf (which contains the cast).  Upper half. Lid Upper Half  Cover/ Lid. Lower Half
  12. 12. Flasking Procedure12  Vaselin Application.  Pouring of Plaster.  Insertion of Model.  Cover Model with Plaster except on Tooth & Wax.  Vaselin Application.  Upper Part Attachment.  Fill Upper Part with Plaster Again.  Cover Upper Tray with Lid & allow it to set.
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  15. 15. Dewaxing15 Wax Elimination. Boiling Water for 4 to 6 minutes. Excess Wax can be washed away with boiling water. After Dewaxing
  16. 16. Application of Seperating Media16 Camels Hair Brush or Cotton held in Tweezers. Apply everywhere on cast except Artificial Teeth. Allow to cool to room temperature. Materials  Cold mould seal  Tin foil  Starch  Vaselin  Cellulose Acetate
  17. 17. Packing17  It is act of pressing a denture base material (Dough Stage) into a mold within flask.  Rod-like form  In the upper half of the flask .
  18. 18. Curing18  Polymerization of Denture Base material.  Self/Chemical Curing.  Microwave Curing  Heat Curing.  Normal Tap Water.  Heat for 45 min  After 45 min allow it to cool
  19. 19.  Deflasking  Disassembling of Flask to get Denture. Finishing & Polishing  Grinding lathe  Polishing lathe with pumice  Brushes and rag wheels suitable for polishing  Polishing compound  No. 6 or 8 round bur  Carbide acrylic burs  Sand Paper  Muslin buff WheelTake care not to generate much heat during polishing to avoid warpage of the acrylic denture 19base.
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