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Amalgam restorations Dr Zsuzsanna Tóth Ph D Semmelweis University, Budapest Dept of Conservative Dentistry Restorative dental materials ▫ Temporary 

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Amalgam restorations

Dr. Zsuzsanna Tóth Ph.D.

Semmelweis University, Budapest

Dept. of Conservative Dentistry

Restorative dental materials

" Temporary restorative materials " Liners and bases " Definitive restorative materials - Direct restorative dental materials (plastic)

Amalgams

Cement

Cermet Cement

Polymers

Composite

- Indirect restorative dental materials (solid) Metal

Ceramic

Glass-ceramic

Direct Ceramic (Cerec)

Gold-ceramic

Composite

Stages and steps in cavity preparation

" Initial cavity preparation stage

1. Outline form and initial depth

placing the cavity margin in the final preparation form

2. Primary resistance form

withstand of cavity walls and restorations occlusal forces without fracture

3. Primary retention form

the shape to resist displacement through tipping and lifting forces

4. Convenience form

Observation, accessability, prep, restoration

" Final cavity preparation stage

6. Pulp protection

7. Secondary resistance and retention forms

8. Finishing external walls

9. Cleaning

1. Slightly rounded configuration

2. Convergence occlusally of vestibular and oral walls

3. Gingival wall is min 1.2mm wide

4. Occlusal width and depth of the restauration 1.5-2

mm

5. Gingival extension

6. Margin of the cavity cca 90o

7. V-shaped side-fissure

Restauration with Amalgam

" Preparation of the cavity " Isolation " Matrices and matrix retainer " Wedge placement " Trituration " Insertion, condensation " Carving, burnishing " Finishing, polishing

Wedges

- keep band tight at gingival margin and - compensate for thickness of band maerial

Lateral and occlusoginigival force is

necessary to properly condense alloy - into proximal locks and - into angles at junction of matrix band with margins of preparation

Define marginal ridge and

occlusal embrasur with explorer

Remove gingival excesses with amalgam knives

Carving

Burnishing

bring the teeth lightly together cotton pelett - alcohol articulating paper (premature contact) Check the occlusion in different sitting positions

Advices

- restrict chewing on the restoration for two hours. - - local anesthesia: to be careful not to bite their lips or cheek - . - some sensitivity to cold and heat for few days can be .This should disappear gradually in few days or a week.quotesdbs_dbs6.pdfusesText_11