removeable partial denture steps

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REMOVABLE PARTIAL DENTURE STEPSS.S Hotchandani

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Denture 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. 

How Are Dentures Made?3

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 and replacement of teeth) determines what type of appliance is best for you, the general steps are :

Impressions

Model Preparation

Survey Framework Waxing Setup

Flasking De-waxing Application of

Separating media Packing Curing Deflasking Finishing &

Polishing

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Impression These are negative replica of patients hard and soft

tissues of Oral cavity usually taken using alginate (Impression Material) in a stock/ custom tray.

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Model Preparation After Impression.

By Cast or Die materials; Plaster of Paris Dental Stone

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Survey Used to

determine heights of contour with a common path of insertion.

A dental surveyor is Used

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Frame Work  Adaptating, and

positioning of clasp. Cobalt based Type IV gold based

alloys Chromium based

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Waxing Temporary Base Plate. Support Artificial Teeth. Modelling Wax.

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Setup Placed on Wax Base Plate. Acrylics Porcelin

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Flasking 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. Lower half (which contains the cast). Upper half. Cover/ Lid.

Lid

Lower Half

Upper Half

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Flasking Procedure 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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Dewaxing Wax

Elimination. Boiling

Water for 4 to 6 minutes.

Excess Wax can be washed away with boiling water.

After Dewaxing

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Application of Seperating Media

Camel's 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

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Packing 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 .

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Curing 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

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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 Wheel

Take care not to generate much heat during polishing to avoid warpage of the acrylic denture base.

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