amalgam restoration
TRANSCRIPT
Make your teeth
Healthy and
Make it Glitter
The university of Georgia
Pediatric Dentistry III
Atheer Ahmed 1330129
Amalgam restorations
Dental amalgam is a metal like restorative material composed of a mixture of silver/tin/copper alloy and mercury.
Dental Amalgam: Alloy of mercury, silver, tin, and copper, it may also contain palladium, zinc , gold to improve the handling characteristics
composition of amalgam
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.
CONTAINDICATIONS OF AMALGM
1-Esthetics. 2- Extensive loss of tooth structure 3- Small class I and class II cavities.
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
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
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 .
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
Thank you appledent
Than you so much dr. Megi Sharashenidze
your student Atheer Ahmed
Reference
WWW.GOOGLE.COMAmerican Association of Endodontists