What are the steps for an amalgam filling?
When placing dental amalgam, the dentist first drills the tooth to remove the decay and then shapes the tooth cavity for placement of the amalgam filling. Next, under appropriate safety conditions, the dentist mixes the encapsulated powdered alloy with the liquid mercury to form an amalgam putty.
What is amalgam restoration?
Amalgam Restoration
Amalgam restorations have been used to restore decayed and damaged teeth for over 150 years. Most people refer to amalgam fillings as ‘silver’ fillings because of their color when first place.
How do you do a class 1 amalgam restoration?
The placement of a class I amalgam restoration in a posterior tooth can be accomplished with the following steps: Application of Copal varnish in two layers with a microbrush or a small cotton pellet for 10 sec., gently drying each layer with air.
What is a Class 1 restoration?
Class I restorations restore defects on the occlusal surface of posterior teeth, the occlusal thirds of the facial and lingual surface of molars, and the lingual surfaces of maxillary anterior teeth.
Why do we polish amalgam after 24 hours?
Polishing after 24 hours produced a significantly smoother surface for both amalgam alloys on both the simulated proximal and occlusal surfaces. 2. The standard polishing procedures after 24 hours produced a smoother surface than any of the immediate finishing procedures tested.
What are the steps in the manual manipulation of amalgam?
Manipulation of amalgam
- Manipulation of dental amalgam 1) Selection of alloys 2) Proportioning and dispencing 3) Trituration 4)Condensation 5)Carving 6)Finishing and polishing.
- Trituration: Trituration is the process by which mercury is allowed to react with the alloy powder.
- Thank You.
How do you do a class 2 amalgam restoration?
Class II Amalgam Preparation & Restoration | Operative Dentistry
What is the definition of amalgams?
: an alloy of mercury with another metal that is solid or liquid at room temperature according to the proportion of mercury present and is used especially in making tooth cements.
Which instrument is used first during an amalgam restoration?
The first and the foremost Instrument used to clear the Cavity of the damaged Enamel and Dentin (Carious tooth structure) is the Aerotor and Diamond cutting burs.
How do you do a Class 2 composite restoration?
Class II Composite Preparation & Restoration | Operative Dentistry
What is a Class 2 dental?
Classification Of Teeth
Class II: Class II is where the lower first molar is posterior (or more towards the back of the mouth) than the upper first molar. In this abnormal relationship, the upper front teeth and jaw project further forward than the lower teeth and jaw.
What is a Class 3 filling?
class 3 dental composite restoration / filling. CLASS 3 COMPOSITES. A cavity that occurs between front teeth is referred to as a class 3. Food collects between teeth. Sugars within food are converted to acids that decalcify enamel.
What is the working time of amalgam?
The setting time of amalgam depends on the composition of the alloy, the shape and size of the particle and the mixing time. 90 % of the final hardness will be reached after 10 – 12 hours.
Why is Cavosurface margin 90 degrees for amalgam?
Because enamel rods are perpendicular to the enamel surface ,the strongest enamel margin results in a cavosurface angle greater than 90 degrees.
Why do we burnish amalgam restorations?
If the amalgam is burnished at the stage of initial contraction, the space caused by contraction is filled by amalgam flow, and the subsequent expansion further improves the adaptation. Burnishing is thus considered to be a method of improving the seal.
Which metal is used in amalgam?
An amalgam is an alloy of mercury with one or more metals. The combination of sodium with liquid mercury is called sodium amalgam. The amalgam of mercury with gold, silver or zinc is widely used for dental fillings.
What is amalgam Class 11?
-The amalgam simply gives the meaning a mixture or a blend of few substances. In chemistry we specifically refer to amalgam as those materials that are the alloys of mercury with another metal.
What instruments are used in an amalgam restoration?
Amalgam Restorative Instruments
- Amalgam Carrier. Function.
- Condenser (Plugger)—Smooth and Serrated. Functions.
- Interproximal Condenser. Functions.
- Liner Applicator. Function.
- Burnishers—Football, Ball, and Acorn. Functions.
- T-Ball Burnisher. Functions.
- Beavertail Burnisher. Functions.
What instrument is used for amalgam?
Condensers – used to pack down freshly placed amalgam into the preparation. Composite Placement Instrument – used for the placement of composite restorative materials. Carvers – used to remove excess material, to contour surfaces, and to carve anatomy back into the amalgam.
What is class II restoration?
Traditionally, Class II restorations were done with dental amalgam. Over the last 15 years, amalgam use has (obviously) sharply declined while composite use has risen higher and higher. Amalgam offered lots of advantages in Class II situations.
What is a Class II filling?
A Class II restoration has to recreate not only the natural contour of the tooth, but also the corresponding proximal contact. Many dentists consider this point, in particular, to be the most demanding part of the treatment.
What are the 3 types of occlusion?
Types of Occlusions (Bites)
- Cross Bite.
- Open Bite.
- Overbite.
- Underbite.
What is a Class 1 filling?
1. Class I: Cavity in pits or fissures on the occlusal surfaces of molars and premolars; facial and lingual surfaces of molars; lingual surfaces of maxillary incisors (Class I corresponds to surfaces of a posterior tooth you can clinically see—occlusal/lingual/buccal surfaces.
What are the properties of amalgam?
Tarnishing is the loss of luster from a metal or alloy surface because of the formation of a surface coating. The alloy remains unchanged and the mechanical properties also remain the same. A sulfide layer formed on the surface causes amalgam to tarnish.
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Chemical Properties.
| Silver | 40-60% |
|---|---|
| Zinc | 1% |
What are the 3 different particle shapes of an amalgam?
Particles of the silver alloy powder can be either irregularly shaped, spherical, or a mixture of the two (Figure 5-4).