29.preparing dentures for delivery

29 Preparing Dentures for Delivery29 Preparing Dentures for Delivery

John Beumer III, DDS, MSJohn Beumer III, DDS, MSDivision of Advanced Division of Advanced

Prosthodontics, Biomaterials Prosthodontics, Biomaterials and Hospital Dentistryand Hospital Dentistry

UCLA School of DentistryUCLA School of Dentistry

This program of instruction is protected by copyright ©. No portion of This program of instruction is protected by copyright ©. No portion of this program of instruction may be reproduced, recorded or transferred by this program of instruction may be reproduced, recorded or transferred by any means electronic, digital, photographic, mechanical etc., or by any any means electronic, digital, photographic, mechanical etc., or by any information storage or retrieval system, without prior permission.information storage or retrieval system, without prior permission.

19. Preparing Dentures for Delivery19. Preparing Dentures for Delivery

a.a. Fabrication of facebow transfer jigFabrication of facebow transfer jigb.b. Finish and polish Finish and polish c.c. Fabrication of clinical remount castsFabrication of clinical remount casts

*Described in this section

19. Preparing Dentures for Delivery19. Preparing Dentures for Delivery

a.a. Fabrication of facebow transfer jigFabrication of facebow transfer jigb.b. Finish and polish Finish and polish c.c. Fabrication of clinical remount castsFabrication of clinical remount casts

*Described in this section

Preparing Dentures for DeliveryPreparing Dentures for Delivery

Fabrication of face bow remount jig Removing Processed Dentures from Master

Casts Finishing Polishing Dentures Fabrication of clinical remount casts Mount the maxillary remount cast on the

articulator preserving the facebow transfer record

Fabricate Facebow Remount Jig*Fabricate Facebow Remount Jig*

Attach processed upper denture with its mounting to the upper member of the articulator and attach a mounting ring to the lower member of the articulator.

Fabricate facebow transfer jig as shown. Note that only the occlusal and incisal surfaces of the denture teeth engage the remount jig. Confine the plaster with a paper cup from which the bottom has been removed.

Smooth the surfaces of the remount jig because it will be used in the presence of the patient.

**The pupose of this jig is to preserve the face bow mounting record.The pupose of this jig is to preserve the face bow mounting record.

Removing Dentures from Casts and PolishingRemoving Dentures from Casts and Polishing

Plaster knife Acrylic Burs Pumice Rag polishing wheels Felt cones Brush wheels Kingsly scraper

Instruments and Materials

Removing Dentures from the Master CastsRemoving Dentures from the Master Casts

Make cuts into the base of each cast almost to the resin.

Insert the plaster knife

into the cuts and carefully separate the sections of stone.

On the right a vibrating air hammer is being used to separate the denture from the cast.

Remove all stone from dentures. The Kingsley scraper is particularly useful in removing tenacious elements.

Finishing and PolishingFinishing and Polishing

Finish borders with an acrylic bur. Remove excess resin beyond the land. Be careful to preserve the border width and contour.

Remove all plaster or stone.

Smooth the denture bases to the proper contour with your acrylic burrs.

Bubbles and other irregularities around the denture teeth can be removed with chisels or scrapers.

• Remove small particles of stone from the proximal areas with a brush wheel.

• The palatal portion should 1-2 mm thick.

Finishing and PolishingFinishing and Polishing

Check the bearing surfaces of the dentures for bubbles and sharp projections. Remove such projections with an acrylic burr or the Kingsley scraper.

Finishing and PolishingFinishing and Polishing

Use a very wet rag wheel with liberal amounts of wet pumice to polish the palatal, lingual, labial and buccal areas. The periphery of the denture must also be carefully polished. Use the edge of the wheel as shown during polishing to avoid burning the acrylic resin. Do not overpolish and thereby loose the contours that were developed during festooning.

Finishing and PolishingFinishing and Polishing

Polished dentures Note that the borders are rounded and smooth, and the palate is highly

polished and the proper thickness

Do not over polishDo not over polish

Be careful not to overpolish the occlusal Be careful not to overpolish the occlusal or incisal surfaces of the denture teeth.or incisal surfaces of the denture teeth.

Finishing and PolishingFinishing and Polishing

Reexamine the tissue side of the dentures and carefully remove any bubbles present with a Kingsley scraper or other sharp instrument.

Finishing and PolishingFinishing and Polishing

•Prior to delivery the dentures must be soaked in water for 72 hours.

Fabrication of Remount CastsFabrication of Remount Casts

Purpose:Purpose:Provide casts with which to mount Provide casts with which to mount the the

clinical remount recordclinical remount record

Remount CastsRemount Casts

Begin by blocking out the undercuts Begin by blocking out the undercuts associated with the undersurface of the associated with the undersurface of the dentures with moistened pumice.dentures with moistened pumice.

Remount CastsRemount Casts

Mix a small amount of impression plaster, place it on the lab bench and imbed the denture into it as shown.

Remount CastsRemount Casts

After the plaster has set, remove the dentures from the cast, and trim them as shown.

The remount The remount casts will be casts will be used to mount used to mount the clinical the clinical remount records remount records on the on the

articulatorarticulator..

You are now ready to perform the You are now ready to perform the clinical remount procedureclinical remount procedure

The maxillary remount cast has been connected to the upper member of the articulator by means of the facebow transfer jig. With the lower remount cast you are now ready to perform the clinical remount procedure.