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Silver-fillings (Amalgams)






Advantages:

1. Durability - lasts at least 10 to 15 years and usually outlasts composite fillings

2. Strength - can withstand chewing forces

3. Expense - is less expensive than composite fillings

Disadvantages:

1. Poor aesthetics - fillings don't match the color of your natural teeth

2. Destruction of more tooth structure - healthy parts of the tooth must often be removed to make a space large enough to hold the amalgam filling

3. Discoloration - amalgam fillings can create a grayish hue to the surrounding tooth structure

4. Cracks and fractures - although all teeth expand and contract in the presence of hot and cold liquids, which ultimately can cause the tooth to crack or fracture, amalgam material - in comparison with other filling materials-may experience a wider degree of expansion and contraction and lead to a higher incidence of cracks and fractures

5. Allergic reactions - a small percentage of people, approximately 1%, are allergic to the mercury present in amalgam restorations

 

6. Modern qualification of dental materials – resin composites.

In the treatment of Dental Caries, it is important to make a distinction between

    • To treat the disease causing cavities
    • To treat (fill) the cavities which are the result of the disease

To treat the disease, the general approach we recommend is to

    • Identify the factors causing the disease
    • Install targeted actions against main etiological factors
    • Check that actions have been successful (evaluation)
    • We consider the treatment of the disease as a most important measure. If cavities are filled, and no measures against an ongoing disease are taken, there is a considerable risk for new cavities, for example at the margins of the fillings (" secondary caries"). To treat the disease, the same strategy as for prevention of caries can be used.

Regarding treatment of cavities - by fillings, inlays etc, a new section is under preparation.

 

 

A dental restoration or dental filling is a dental restoration used to restore the function, integrity and morphology of missing tooth structure. The structural loss typically results from caries or external trauma. It is also lost intentionally during tooth preparation to improve the aesthetic or the physical integrity of the intended restorative material.

A tooth preparation is the finished product of a tooth's structure prior to restoration with a dental restorative material, such as gold, amalgam, composite, porcelain or any number of other materials.

Tooth preparation is usually required before placing a dental restoration. This process involves cutting the tooth usually with a dental drill to make space for the planned restoration, remove any dental decay and structurally unsound tooth. If permanent restoration can not be carried out after tooth preparation, temporary restoration is done.

There are two types of preparations.

  • Intracoronal preparations are those preparations which serve to hold restorative material within the confines of the structure of the crown of a tooth. Examples include all classes of cavity preparations for composite or amalgam, as well as those for gold and porcelain inlays. Intracoronal preparations are also made as female recipients to receive the male components of RPDs.
  • Extracoronal preparations are those preparations which serve as a core or base upon which or around which restorative material will be placed to bring the tooth back into a functional or esthetic structure. Examples include crowns and onlays, as well as veneers.

In preparing a tooth for a restoration, a number of considerations will come into play to determine the type and extent of the preparation. The most important factor to consider is decay. For the most part, the extent of the decay will define the extent of the preparation, and in turn, the subsequent method and appropriate materials for restoration.

Another consideration is unsupported tooth structure. In the photo at right, unsupported enamel can be seen where the underlying dentin was removed because of infiltrative decay. When preparing the tooth to receive a restoration, unsupported enamel is removed to allow for a more predictable restoration. While enamel is the hardest substance in the human body, it is particularly brittle, and unsupported enamel fractures easily.


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