prostho summery 1

8/3/2019 Prostho Summery 1

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This lecture is not a separate lecture given by the doctor but it is an introduction to prosthodonticsand an orientation to laboratory and clinical steps that are covered by this course .Lets start with some important definitions

Definitions: Prothesis ( ):Replacement of lost body part

the prostheses : plural of prosthesis Prosthetics: science and art that deal with

prostheses Dental prosthetics is called prosthodontics :

) ) replacement of loss oral tissuesrelated to oral cavity .

Prosthodontist :person who specializes inprosthodontics.

Complete Denture (CD) : dental prosthesis that

replaces all missing teeth and associatedstructures .

Edentulous: patient with no teeth ( ). Partially edentulous: patient with some teeth

missing.

Dentate: still have teeth.


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prosthodontics

Fixed prosthodontics*the restoration cant be removed

from its place by patient .Ex.(crowns and bridges)

Removable prosthodonticsThe restoration can be

removed from its place bypatient .

*actually it should beremoved from its place

every day to get cleaned .

Complete denture

*when we have no teeth at all inthe patients mouth all teeth aremissing.

Partial denture

*where we have missing andremaining teeth .not all teethmissing

Acrylic partialdenture

Chrome-cobaltpartial denture

An immediate denturedelivered at the same day of

extraction.

An Over denture rests on1.remaining roots of un extracted

natural teeth*notice not remaining teeth

remaining roots .2.implants

Can rest on implants

Or roots of naturalteeth

Implantprosthodontics

Maxillofacial

prosthodontics

*here we dont replacemissing teeth or gums wereplace missing structures

Conventional fixed

Crowns and bridges

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Now we will talk about clinical and laboratory steps

First of all you should know that making a complete denture requires 5 visits minimum ideallyif you were lucky and things went smoothly and you dont have to repeat steps ..Some private clinics skip a visit or two and this is questionable if they get the best results or not !!and most likely they dont

clinic labFirst visit history

examination and primaryimpression

1. History taking

2. Clinical examination3. Primary impression

making using :

Alginate

OR Impression

compound

*we getmoderatelyaccurateimpression

*in primary impression we usestocktray.

1.Poring the impression

using gypsum type 2plasterWe get primary castsmoderately accurateOn the primary casts we2.fabricate special traysusing:

Cold cured acrylic

OR Light cured acrylic

*we get special orcustom

trays.

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Second visit secondaryimpression

1. Boardermoulding

using greenstick

compound.2. Secondary

impression

taking usingzinc oxide

eugenol

impressionmaterial

OR

3.rubberimpressionmaterial.

*we takesecondaryimpression usingcustom made

tray .

*we get moreaccurate

impression.

1.Pouring secondaryimpression using type 3gypsum (dental stone)we get secondary castson secondary casts we2.fabricate record blocks

*record blocks are composedof:1. base plate made from lightcured acrylic resemblingdenture base2. wax rim on the base plateoccupying the place of thefuture teeth

Third visit jaw relationrecord

1. taking measurementsof patents face andmouth which meansrecording therelationship betweenteeth and facespecifically for ourpatient .

2. bite registration

which means recordinghow my patient bites .

1. mounting therecord blocks that

are sealed together

on an articulator tomake my self anexact replica of thepatients mouth .

2. teeth setting whichincludes removingparts of the wax andputting the acrylicteeth in its place .

Fourth visit try-in Try-in we try the recordblocks with the teeth set onwax and check for:

Esthetics phonetics

and Occlusion

Processing which is a type oflost wax technique replacingwax with acrylic.Processing includes:

a. Flaskingb. Dewaxingc. Packingd. Curinge. Deflaskingf. Finishing and

polishing of thedenture

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Fifth visit delivery Delivery that means givingthe denture to your patienttelling him how to wear it andalso again checking estheticsphonetics and occlusion .

Ifthe denture needs a typeof modification that cant bedone in the clinic you canreturn it to the lab for

modification.*usually we dont need thisstep as most modifications atthis stage can be done chair-side (in the clinic)

Sixth visit recall You have to review your patient to see how is thedenture in function meaningin chewing and talking etc..*90-95% of patients satisfiedat delivery will havecomplaints at recall.

The end

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prostho summery 1

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