Metal orthopedic structures made by stamping are one of the affordable ways to restore the dentition at a very affordable cost. The design is a cap that is worn over the tooth. Only previously it is necessary to perform the preparation procedure for the stamped crown.
Despite the fact that this technique to restore the structure of damaged teeth has been used for a long time, recently such crowns have lost their relevance among most patients. And this is understandable, since the aesthetic appearance with these crowns leaves much to be desired. In addition, instead of stamping, there are now more advanced analogues that in appearance are as similar as possible to natural teeth. True, they cost several times more.
Advantages and disadvantages
Stamped products have both advantages and disadvantages. Among the advantages are worth noting:
- Low cost in comparison with plastic counterparts or metal-ceramic crowns.
- Simplicity of design.
- Fast production.
- As a substitute for other prosthetics.
As for the cons, there are noticeably more of them:
- Due to their structural features, after the preparation of the teeth under the stamped crowns, they do not fit snugly to the neck of the tooth, due to which there is an accumulation of microorganisms. In turn, this leads to caries or periodontal disease.
- After some time, the cement fixing mixture is completely absorbed.
- Lost functionality cannot be fully restored.
- The strength of the crowns is not high enough, therefore, after prolonged use, the base is worn out.
And finally, another disadvantage of stamped crowns, important for many people, is that their appearance spoils. Products have an unsightly appearance and therefore they are relevant to use in relation to the chewing group.
In what cases is there a need
Stamped crowns are relevant in cases where the natural crown of the teeth is badly damaged and there is no way to restore it using filling material.
In addition, other indications for the preparation of teeth under stamped crowns may include:
- The presence of severe tooth defects.
- There is a need to correct the height of the bite.
- Hard fabrics are subject to abrasion.
- For the production of fixed prostheses or the formation of reliable support for removable structures.
In addition, crowns can be used to protect deciduous teeth from decay. At the same time, there are certain contraindications, which will be discussed below.
List of contraindications
For children under the age of majority, the procedure for preparing teeth is not recommended, since tissue formation and growth occur during this period of their life. And it is highly undesirable to intervene in this process in any way. Other cases also exist:
- If the dental canal is treated poorly.
- The inflammatory process of pulp and periodontal disease in the chronic stage.
- High degree of tooth mobility.
Also, do not start preparation for a stamped metal crown for patients with bruxism (involuntary grinding of teeth).
Production material
As a rule, the production of crowns by stamping is carried out using metal, both with and without spraying. The surface layer is usually formed of a noble material - gold or silver. Gold spraying, for obvious reasons, is in great demand. Although earlier crowns were relevant without spraying.
Today, stamped crowns can be delivered only by people who have a limited budget. This is due to the fact that all other analogues of high-quality plastic or ceramic are not cheap.
Crowns
The production of stamped crowns includes two main stages:
- Clinical - the work is performed by an orthopedic dentist with the participation of the patient.
- Laboratory - a technician is already connected here.
It all starts with preparation - the preparation of the tooth is done under a stamped metal crown, resulting in a stump. After that, an imprint is made from the upper and lower jaw. Then a technician is connected to the work, which, in laboratory conditions, forms the models of the jaws from plaster according to the received impressions. In this case, the position of the central bite is determined, for which a special apparatus is used - the occluder.
Then, using the gypsum model, the technician uses wax to recreate the anatomical shape, from which the gypsum stamp is then cut out, and then from a light metal alloy. After that, the sleeve is selected with the necessary shape. At the end, the crown itself is stamped, which is sent already to the dentist for installation.
Features of the preparation procedure
If we compare stamped crowns with other analogs, then the procedure for preparing teeth differs in characteristic features. This removes a thin layer of tissue. The whole process goes according to a certain scheme, which can be divided into several stages. Actually, the preparation rules themselves for a stamped crown:
- At this step, the preparation is carried out using diamond grinding stones. With their help, the upper layer is removed with a thickness of 0.5 mm. At the same time, what kind of thickness should be removed depends on the material of manufacture of the crowns. In addition, the need for spraying the surface of the product also affects this. In other words, if you need to cover the crowns with gold, you will have to remove a fairly thick layer.
- Now you need to check the space between the treated tooth and its antagonist. At the same time, its dimensions must comply with established standards. For this, a special strip of wax is used - the patient needs to bite her and after that an assessment of the resulting fingerprint is made.
- Here, the contact surface of the tooth is subjected to treatment using special diamond discs.
- At the final step of preparing the teeth under an artificial crown , the palatine and buccal surfaces are processed so that the tooth being turned becomes cylindrical. It is important that the diameter of the stump corresponds to the dimensions of the root of the neck of the tooth.
You may notice that this procedure is an important part of the dentist's work.
Here you need not only to have “firm” and “confident” hands, but also be vigilant and careful not to damage neighboring teeth.
Varieties of preparation
The preparation procedure without fail involves the formation of a step, which can take a different form:
- Knife-shaped. Its width is a third of a millimeter.
- Grooved. Here the width is already 1 mm, this option is used during prosthetics using cermets.
- Brachial. This ledge has the largest width - 2 mm. This is the most uneconomical option, but at the same time, the effective attachment of the crown to the tooth is ensured.
This is precisely the principle of preparation under the crown, and if the ledge is not formed, then this is already considered a serious violation. As a result of this assumption, the crown does not fit snugly to the tooth, which leads to complications of the oral cavity: the development of diseases, discomfort, etc.
What you need to know
There are certain requirements that professional dentists adhere to. And first of all, the crown should tightly clasp the neck of the tooth on which it will be placed. If the product is too wide, irritation of the gum tissue and their displacement can occur, which subsequently leads to atrophy. However, the gap during the manufacture of crowns in any case will be, but it will be filled with cement, which then dissolves completely.
The immersion of crowns in the gingival sulcus should be no more than 0.3 mm. Otherwise, the development of regional periodontitis will begin, and in acute form.
We are already familiar with the types of preparation for crowns. In this case, the installed product must fully restore the operability of one or more damaged teeth. And this applies not only to chewing function.
In addition, the crowns must fully comply with the anatomy of a natural tooth, including all the tubercles and equators. And when the treated tooth comes in contact with the antagonist, the interalveolar height must be maintained. Otherwise, there is a risk of injury.
Possible mistakes
No one is safe from mistakes, the human factor can affect any area of human activity, and dentistry is no exception. And since this area deserves increased attention, it is necessary to try to minimize all possible risks. Nevertheless, there may be errors.
There are cases when the crown is not placed on the machined tooth, although the preparation for the stamped crown was performed efficiently and in accordance with all requirements. In this case, the matter is most likely in the wrong impression. It will not work to deliver the product in any way; it is necessary to re-manufacture the crown.
Alteration also includes those products that:
- freely put on a tooth;
- Do not contact with nearby units;
- when closed, antagonists are not reached;
- does not reach gum tissue more than 0.1 mm.
Errors at the stage of fixation of crowns can eventually result in complications. And this is not only uncementation, but also the development of dental diseases.
Care Features
Do not think that with the installation of stamped crowns you can forget about them, you must adhere to elementary rules of the same oral hygiene, as usual. The main thing here is to carry out the procedures regularly and thoroughly. Actually, we have been taught this since childhood:
- Daily brushing with toothpaste.
- It is necessary to rinse your mouth after each meal and even smoking. To do this, you can use special rinses or running water from the tap.
- Dental floss will help get rid of food debris in hard to reach places, which should not be neglected.
After the preparation procedure for the stamped crown and its installation, you must visit the dentist after 90 days. The specialist will inspect the products and evaluate their condition. In addition, now visiting a dental clinic is a must. This will avoid serious problems.
What time crowns are designed for
Despite the fact that stamped crowns have a very affordable cost, but it is possible for this reason, these products are designed for a relatively short term of operation - 2-3 years. But specialists in the field of dentists recommend changing them a little more often, at least once a year.
Usually, after preparation under the stamped crown, during this time, a gap forms between the crown and the tooth, where food particles can fall. As a result, this negatively affects the structure of the tooth.
In any case, the final term of operation depends on the characteristic and individual characteristics of the patient and on how responsibly he is suitable for the care of crowns.
Issue price
How much can such a pleasure cost? The formation of the cost of crowns is affected by the composition and external coating. A metal product will cost patients 1,500-1,600 rubles. For spraying will have to pay a little more - 1700-1800 rubles. Lining made of plastic material will cost a little more - 1900-2000 rubles. And if the crown will be made with facing and spraying, then the amount can reach up to 2100 rubles.
It’s worth noting that dental clinics offer a price for the preparation procedure for various types of crowns. As a rule, in the regions the cost can be from 1000 to 1300 rubles, while in Moscow clinics you will have to pay at least 1500-2500 rubles for such a prosthetics.
Not all dentists prefer to contact this type of prosthetics, which is explained by their low “return”, and transportation is also included in the costs. In many respects, these are elite-class dental clinics.