Types of fillings
Mainly dental fillings can be divided into two kinds – these are temporary and permanent. Both those and others fulfill their specific function. Temporary filling is usually established for medicinal purposes, when it is necessary to put a medicinal product under it.
Temporary seal does not infrequently perform a diagnostic function. If the doctor is not sure whether the nerve of the tooth is affected or not, he places a temporary seal and when he is convinced that the nerve is intact, changes it to permanent.
Permanent fillings are set to the patient for years, sometimes even long years, depending on the type of material they are made of. There are currently 3 main types of seals depending on the material:
– metal, – cement,
Cement fillings were constantly used for a very long time in dental practice. But such seals have a number of significant drawbacks. The main disadvantage of them is the poor adhesion to the edges of the tooth, resulting in possible waste of material from the tooth wall. The resulting slit enters the remains of food, and there is secondary tooth decay or new tooth decay along the edge of the seal.
The second type of dental fillings is metal, they are also called amalgams. This seal consists of an alloy of a certain metal with mercury, which is the most important and significant minus, because mercury is a metal with toxic properties. Also, such fillings look small aesthetic and have certain difficulties in installation, their solidification occurs within 2-3 hours. Due to the above, metal seals have remained in the past.
And the most, perhaps, comfortable and durable material that is often used in modern dentistry is dental fillings made of composites. They are distinguished by three types: seals based on epoxy resins, acrylic containing and light-curing. A couple of years ago these materials were supplied to Russia from abroad, but today production is established in St. Petersburg, Cherkassk and a number of other cities.
Disadvantages of durable seals
The first and second kind of seals have disadvantages. For example, acrylic fillings are quite toxic and can cause complications after their installation, such as inflammation of the tooth nerve, pulpitis, secondary tooth decay.
Epoxy-based fillings have less toxicity, but darken over time.
The same used today are light-curing dental fillings (light composites, heleoplombs). This seal is subjected to UV light polymerization and hardens, although the lamp is also used when installing some cement seals.
The light seal looks good, aesthetic, as it is possible to model it under the anatomical shape of the tooth, and also it is possible to choose a shade that coincides with the shade of enamel on the teeth patient. Over time, the color of the light-curing seal does not change. This seal is non-toxic, rack, durable and allows to restore the shape of even a significantly destroyed tooth.