amalgam restoration
TRANSCRIPT
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Make your teeth
Healthy and
Make it Glitter
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The university of Georgia
Pediatric Dentistry III
Atheer Ahmed 1330129
Amalgam restorations
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Dental amalgam is a metal like restorative material composed of a mixture of silver/tin/copper alloy and mercury.
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Dental Amalgam: Alloy of mercury, silver, tin, and copper, it may also contain palladium, zinc , gold to improve the handling characteristics
composition of amalgam
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INDICATIONS OF AMALGM
Dental Amalgam: • Restoration of posterior teeth(ClassI&II) (Moderate to large preparations). • Class V preparations (when esthetics is not the prime concern). • Core build up for badly broken down teeth in the posterior teeth. • Sometimes in distal surface of canines. • For moderate caries control.
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CONTAINDICATIONS OF AMALGM
1-Esthetics. 2- Extensive loss of tooth structure 3- Small class I and class II cavities.
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ADVANTAGES OF AMALGM
1-Ease of use. 2- High compressive strength. 3-Excellent wear resistance. 4- long-term clinical results. 5- Economic 6-Can be bonded to tooth structure. 7-Self-sealing ability
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DISADVANTAGES OF AMALGM
1-Lack of esthetics 2- Less conservative 3- Non-insulating 4- Corrosion and galvanism 5- Lack of reinforcement of weakened tooth structure
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MANIPULAION OF AMALGM
1. Selection of alloy and mercury 2. Mercury alloy ratio (Proportioning) 3. Trituration (Mechanical and hand) 4. Mulling 5. Condensation (Hand and mechanical) 6. Pre-carve burnishing 7. Carving. 8. Post-carve burnishing. 9. Polishing .
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Cavity preparation of amalgam
1. 90 degree . 2. The walls must be parallel or perpendicular to occlusal loads. 3. A definite gingival seat of 1.5-2 mm. in depth for compound cavities. 4. Rounded internal line angles. 5. Sufficient bulk at the isthmus area 6. Each portion must have its own independent retention and resistance
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Thank you appledent
Than you so much dr. Megi Sharashenidze
your student Atheer Ahmed
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Reference
WWW.GOOGLE.COMAmerican Association of Endodontists