Do NOT crown your teeth! - Must watch before dental work!
When should plastic crowns be placed?
Not many people who require crowns are comfortable with metal crown options. In the old days, people had little choice, so they often had to resort to just this type of prosthetics, but today everything is different.
When treating anterior teeth, we focus primarily on aesthetics. It is important that the color of the denture is identical to the natural color of the enamel.
Many methods allow this to be achieved, including plastic crowns worn over the front (front) teeth. In their shape, contours, appearance, they perfectly fit into a smile, no different from their natural colleagues .
What is a crown and when you need it
It is a kind of cap that covers the tooth, if there are certain indications for that, based on its condition:
- The need to protect the seal from falling out;
- Severe decay due to trauma or caries;
- The presence of a large seal, which cannot be held without protection;
- The need for prosthetics when installing a bridge.
There are a number of variations of these caps that are used depending on the situation.
Its main advantages are simplicity of manufacture and low cost. Many people choose this particular variety due to the fact that you can choose a color that matches the natural one. Under certain circumstances, there are a number of indications when it is necessary, but there are also contraindications for installing plastic crowns.
Here's how they are used:
- The presence of defects in the front teeth;
- Their size, color, shape are wrong;
- For the treatment of periodontal disease.
This aesthetic and inexpensive option has contraindications for use. They cannot be installed in children, in the presence of an allergy to plastic, in people with mental disabilities, in violation of the bite, inadequate hygiene, in case of acute inflammation in the area where the prosthesis will be.
Despite its aesthetics, the plastic cap is often used as a temporary protection until the prosthesis is made from more durable and reliable materials.items.
Its main disadvantage is a low level of wear resistance. Due to this, it is sometimes used as a permanent denture for anterior teeth, but when it is necessary to protect the chewing teeth, such a cap is usually used temporarily.
The structure of the plastic is porous, due to which it easily absorbs odors and colors. Because of this, the service life of a crown made of this material is short. Even if the person does not smoke, the risk is high that it will darken quickly. This can be facilitated by drinking tea, coffee and even berries and vegetables.
In addition, bacteria in the pores of the material perfectly take root and multiply, which adversely affect the adjacent teeth, spoiling them. Dentures made from this raw material are more prone to cracking and chipping. If the plastic crown is permanently installed, strict hygiene practices must be followed.
Why doesn't modern dentistry refuse such a delicate material at all? It's all about the aesthetics and low cost of manufacturing such prostheses.
They can last about 2 to 8 years, depending on how well they are cared for and what type of material they are made of. Dentures can be cast (more durable raw materials) and pressed (less reliable material).
Manufacturing of a plastic crown is carried out in several stages. First of all, you need to prepare the oral cavity before installing the cap. For this, the patient is examined for allergies, tissue preparation is performed. The next step is to prepare the impression using a special material. Next, a model of the prosthesis is made of plastic of the required color and its fitting.
In the course of it, some defects and flaws may be found. If they are not eliminated, you will feel discomfort in the oral cavity when installing a permanent prosthesis. Therefore, it is processed again, and when it is brought into the desired shape, it is installed, secured with special materials.
This is one of the most reliable materials for making caps . They are placed on the chewing teeth, which bear the greatest stress, and often on the front teeth, in order to maximize their life.
In the latter case, they are sprayed with plastic or other materials, such as ceramics. This allows you to choose the right color so that the smile does not betray the presence of prostheses.
A conventional metal crown is thin enough that it does not require sawing off a large part of hard tissue to install it. In this regard, if it is worn on the distant teeth, which are not visible, it is advisable not to spray it with anything.
One of the drawbacks of a metal crown with a plastic or ceramic lining is its thickness, which is due to the spray layer with the required color. It is also worth considering that the distance from the edge of the prosthesis to the wall of the adjacent tooth should benot less than 1 mm.
Making such caps has its own stages. The tissue is prepared, a plaster cast is removed, and a metal crown is made from it, a hole is made in it, and tried on. Its cavity is filled with wax and then tried again. Excess wax is squeezed out through the hole, and an impression is formed from the rest.
Next, the impression is taken using plaster with preliminary installation of a metal prosthesis into it. Then the specimen is separated from the impression and the plastic is added to it by heating. The next stage in the manufacture of a plastic-lined crown is fitting. If defects are identified, they are corrected, and then, using phosphate cement, they are fixed on the stump.
This process takes time. There are often cases when one fitting is not enough, so you have to resort to other methods of protecting the prepared stump at this time. In such cases, ordinary plastic crowns are placed on the chewing teeth for a while.
Today it is one of the most popular types of caps . It is durable, can last for a very long time, and in appearance it also matches the rest of the teeth. It can be placed both on the front teeth and on the chewing teeth. However, there are contraindications even to this type of prosthesis.
Do not put them on children, adolescents, in the presence of live pulp, serious violations of the dentition. There are other contraindications, but in these cases, a discussion with a doctor is necessary. These include an irregular bite, a tendency to crumbling hard tissue.
Manufacturing of this type of crowns is similar to the manufacturing technology of copings with plastic veneer.
Hygiene is always very important, but if you have crowns it is doubly important. In this case, the oral cavity needs to be looked after even more carefully.
Due to the fact that the prosthesis is almost always slightly away from the gums, food debris collects in this gap. Be sure to brush your teeth after eating. It is advisable to do this no later than after 5-30 minutes. This applies not only to a full breakfast, lunch or dinner, but also to small snacks.
Sometimes a brush is not enough to get rid of food debris, so don't forget to use dental floss as well. These rules must be followed regardless of whether you have a temporary plastic crown or a permanent denture.
Use regular toothpastes and brushes to cleanse your mouth. Try to choose pastes with natural herbs. Do not try to whiten crowns - this is unlikely to work.
If for some reason your teeth cannot fully function without additional protection, do not despair - modern dental prosthetics will allow you to effectively solve this problem!