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RESTORATIONS (FILLINGS)

If a single spot on one of your teeth is not cleaned daily, the remaining bacteria will transform themselves into a sticky film substance called plaque. The plaque will produce acids which eat away at the enamel of the tooth and will eventually cause cavities. When the cavity gets through the enamel, into the underlying tooth structure (the dentin), repair or restoration is necessary.

If there is sufficient tooth structure remaining after removal of all the caries, a filling is placed. There are three types of fillings commonly used:

Amalgam (silver) Fillings  

Amalgam (silver) fillings have been used for decades and they remain one of the most commonly used filling materials. They are often referred to as metal fillings. Amalgam is a mixture of silver and other metals, such as copper, tin and zinc, grounded into powdered form. The silver powder is mixed with mercury and placed into the cavity preparation where it is shaped before hardening.

In recent years, the safety of amalgam fillings has come under scrutiny because of the mercury it contains. The absorption of elemental mercury is known to be a contributing factor to several diseases, including Alzheimer's, multiple sclerosis, dementia and arthritis. However, recent studies have proved amalgam fillings to be perfectly safe. It is true, that mercury vapor is toxic but mercury molecules in hardened amalgam are bound to the silver molecules rendering the level of toxicity harmless. The American Dental Association and the Food and Drug Administration have researched the safety of amalgam fillings and have found them to be not only safe but extremely effective.



Gold Fillings / Gold inlay  

Gold fillings are widely viewed of restorations. From a bio-mechanical perspective, they are the ideal material as they will not tarnish or corrode and they wear at the same rate as tooth enamel. The placement of a gold filling requires two separate appointments with your dentist. At the first visit, the cavity is removed and the tooth is prepared. An impression is taken of the tooth preparation and a temporary restoration is placed. A custom made filling is made from the impression. At the second visit the temporary restoration is removed and the gold filling is placed. A cast gold filling is made in a dental lab and sent back to your dentist, who cements it in place in your mouth. You will need at least two visits to the dentist to get the job done.

Advantages

  • Gold fillings is stronger than amalgam fillings.
  • Gold fillings last a long time.

Disadvantages

  • Gold fillings costs more than other kinds of fillings.
  • Gold fillings and crowns are indirect fillings, so they require at least two appointments.
  • The gold colour may not appeal to people who want a "natural" look.
Composite Fillings  

Composite fillings are the newest type of filling in common usage. They are commonly known as white fillings. They are a porcelain/plastic hybrid that is bonded directly to the cavity preparation. Composite fillings were created as an alternative to traditional metal dental fillings. They are colored to look like natural teeth and are more esthetically pleasing than amalgam or gold fillings. They are also strong, durable, and make for a very natural looking smile.

Your dentist will give you a local anesthetic to numb the area before preparing an access to the decayed area of the tooth and removing the decayed portions. Traditional drills, micro air abrasion or even with a dental laser can be used to accomplish this.

A special dental material is then used to open up the pores of your tooth's dentin and roughens up the surface of the exposed enamel. This creates a stronger bond between the tooth and the filling. The bond resin is applied to stick the composite to your tooth. This material is made of the same dental resin as the composite however it is much more fluid.

With a composite filling, your dentist will be able to preserve more of the natural tooth as the composite resin can be bonded to the tooth in thin layers and slowly built up to form a complete filling. A bright dental light will harden each layer before the next is applied.

If the decayed area of your tooth is close to a nerve, a special liner can be used to protect the nerve. A special dental material is then used to open up the pores of your tooth's dentin and roughens up the surface of the exposed enamel. This creates a stronger bond between the tooth and the filling. The bond resin is applied to stick the composite to your tooth. This material is made of the same dental resin as the composite however it is much more fluid. This layer is then hardened by the bright light in the same way as the composite layers.

Once your filling is completed, your dentist will use a special articulating paper, to adjust the height of your dental filling and to ensure that your bite remains correct. Your tooth is then polished.

If such a filling is not going to be enough to protect your damaged tooth, or if your tooth enamel is thin and will easily fracture, or if your tooth has had a root canal that weakened your tooth condition, your tooth may require additional protection such as a crown.

Advantages :

  • Bleaching is much cheaper than crowns or veneers and research indicates that it is completely effective in more than 90% of people.
  • The composite bonds to further support the remaining tooth structure helping to prevent breakage and damage to your tooth.
  • They look more natural as they are color blended to match your natural tooth color. These fillings are often used to improve the appearance of misshapen, chipped or discolored teeth.
  • Composite fillings last from six to twelve years or more.
  • The procedure usually takes just one visit to your dentist.
  • There is very little sensitivity to hot or cold items, often experienced with amalgam fillings.
  • The dentist won't need to drill as much of the tooth structure as the composite is applied in layers.

Disadvantages :

  • Composite resin fillings require more time to apply than amalgam fillings.
  • As a result of the time required there is an increased cost for placing composite fillings.
composite material
3M
Kerr





Compared between Amalgam
and Composite Filling

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Operative Dentistry, Restorations, Amalgum Filling, Gold Filling, Composite Filling, Operative Dentistry Dental Clinic Bangkok Thailand