Metal-ceramic crowns have a strong metal frame inside (a mixture of cobalt or nickel with chromium, a gold alloy), and on top they are lined with ceramics, which are applied in layers, firing the prosthesis after each layer. If the technology is followed correctly, it is possible to achieve strong adhesion between ceramics and metal.
Metal-ceramic crowns have good aesthetics and high strength. Therefore, they are recommended to be used for prosthetics of chewing teeth. It is possible to install metal-ceramics on the front teeth, but in some patients, after installing metal-based crowns, the marginal gums appear blue. If gum tissue is visible when you smile, the overall aesthetics will be compromised.
Content:
- Features of metal-ceramic crowns per tooth
- The need to install a metal-ceramic crown on a tooth
- The procedure for manufacturing metal-ceramic structures for teeth
- The procedure for installing a metal-ceramic crown on a tooth
- Rules for caring for metal-ceramic crowns
- Repair procedures for metal-ceramic crowns on teeth
A metal-ceramic tooth crown consists of two parts: metal and ceramic, respectively. Unhealthy teeth cause great discomfort and require the help of a specialist. When it is impossible to restore the original shape of teeth for a long time by filling, doctors suggest installing crowns. Metal-ceramic products are the best option for restoring teeth. The first layer is metal, it is responsible for the chewing function; ceramics are thinly applied to it. This coating does not cause allergic reactions, so it is suitable for most patients. The procedure is carried out by highly qualified specialists with experience. The quality of work on installing a crown on a metal-ceramic tooth is ensured by modern equipment and original materials.
Features of metal-ceramic tooth crowns
Such products can serve uninterruptedly for more than ten years; with the correct load during chewing, high-quality installation, and proper care, the period increases.
The manufacture of prostheses requires professional knowledge, materials whose quality is confirmed by a certificate, and laboratory conditions. By observing all the required standards, prosthetics will be completely safe for the client.
Despite the fact that metal-ceramic crowns do not emit toxic substances during use, they can behave in different ways in the mouth, each case is individual. A frame made of nickel or chromium-nickel alloy can cause allergies if the structure is based on a base metal; it will oxidize over time when in contact with saliva.
The high strength of the crowns allows for greater loads when chewing. Due to their aesthetic appearance, the products are often installed to cover the front teeth, as well as premolars and molars.
The metal-ceramic crown is highly durable, does not wear off and is not subject to carious changes.
There are cases of puncture, to eliminate the problem there is no need to remove the product; specialists correct the prosthesis in the oral cavity.
One of the disadvantages is the high degree of grinding of the abutment tooth. Most often, the tooth is depulped and the root canals are filled. In this case, it is necessary to remove the nerve to avoid burns to the pulp.
Making a crown for a tooth from metal-ceramics
Can I use dental floss?
If you have any dentures in your mouth, you should either refuse floss completely or use it too carefully. The crowns are fixed in such a way that natural micro-gaps between them are preserved, which require cleansing. However, when flossing, you should not make vertical movements - only horizontal ones. That is, you need to insert the thread not from the cutting edge, gradually moving towards the gums, but place its tip directly into the gap - make several horizontal movements and remove it in a similar way.
Do not use the prosthesis if it has a chip or crack - try to see a doctor as soon as possible to restore the integrity of the crown/inlay or for a prompt replacement. Otherwise, there is a high risk of developing inflammatory processes under the prosthesis.
The need to install a crown on a metal-ceramic tooth
It is advisable to install a metal-ceramic crown to restore a tooth that cannot be restored with filling, for installation on an implant, and also when tooth enamel is highly abrasive. Such prostheses can serve as a replacement for previous metal or plastic ones.
Metal-ceramics restores the natural shape of teeth with high precision and is almost the same in shape and texture. After prosthetics, the patient does not feel discomfort, there are no defects in speech and chewing function. It is practiced to install metal-ceramic dentures on teeth and crowns in the complete absence of dentition. The introduction of crowns is advisable regardless of the type of tooth.
Due to the hygiene and material, the crown is resistant to the influence of pathological microflora, bacteria, and fungi.
In case of abnormalities in the development of the dentition, if inlays or veneers are contraindicated, a crown will be the best option.
During operation, the prosthesis does not change color and is not affected by natural pigments, food coloring, nicotine, caffeine, etc.
Contraindications include:
- allergic reactions to product materials;
- periodontal disease and severe periodontitis;
- malocclusion;
- bruxism;
- low set teeth;
- excessive tooth mobility.
To avoid unwanted reactions and consequences after installing a prosthesis, you must carefully read the contraindications.
Making a crown on a tooth, before and after photos
What is the service life of different types of crowns?
As you know, any structure has a certain service life. Unnecessarily long use can lead to dire consequences.
So: how often should crowns be replaced?
It is believed that the average service life of a crown is 5-7 years. At one time, scientists proved that it is after such a period of time that the cement on which the crown is fixed begins to undergo changes. But this does not mean that the crown must be changed every 5 or 7 years. During this period, a doctor should evaluate it to understand whether it can still serve or whether the crown needs to be replaced.
In addition to the duration of use, during a preventive examination, the doctor evaluates the following parameters: the quality of the marginal fit of the crown to the tooth, the condition of the gums and bone tissue next to the crown, X-ray data of the tooth, patient complaints, etc.
The procedure for making crown structures for teeth made of metal-ceramics
- Before proceeding with crown modeling, the client is prescribed a series of laboratory examinations. To install a prosthesis, the patient's oral cavity must be completely healthy. Found open cavities are filled and professional cleaning is prescribed.
- Based on the results of the preparatory period, you can begin selecting the product. Some are known for their durability, while others come with more than a year's warranty.
- The production of the prosthesis is carried out in laboratory conditions in stages.
- To obtain a high-quality impression, the doctor carries out a procedure for preparing the supporting part of the chewing element. After which you can make a two-layer print. Then, permanent fixations or bridges are installed in place of the prepared teeth. The dentist must determine the center of closure of the dental system.
- The one-piece metal crown frame is precisely adjusted to size, and the ceramic veneer is selected to match the color of the patient’s teeth.
The procedure for installing a crown on a metal-ceramic tooth
After the preparatory procedures, the tooth must be sharpened to the size of the crown. An orthopedic dentist takes an impression to form a model of the prosthesis. The actual production of the crown is performed by a dental technician in a dental laboratory.
Typically, a crown on a tooth takes time to produce. Before receiving a permanent prosthesis, the client must visit a specialist at least three times. The duration of the entire process is from seven to ten days, not taking into account the treatment time.
While the permanent crowns are being made, the client will have a temporary plastic crown installed. This is necessary to protect the implant or ground tooth from the influence of food and saliva.
After trying on the finished product, if the patient is comfortable with the prosthesis, it is attached to the implant using a special solution.
Making a crown for a tooth from metal-ceramics
How much can you eat after dentures?
After installing permanent crowns or inlays, you can drink water immediately, but eat after 1.5-2 hours. This is not related to the type of prosthesis or the adhesive used for fixation. During treatment, anesthesia is used - and it is very important that its effect wears off completely, otherwise chewing can injure the tongue or the inside of the cheeks.
After installing temporary crowns or inlays, you are allowed to eat food after 2-3 hours. However, in such a situation, it is strongly recommended not to put any stress on the restored tooth and try to chew food on the other side - not only at first, but throughout the entire period of wearing the temporary structure. It is impossible to put a load on such prostheses - they are not designed for it (naturally, if we are talking about crowns or inlays, which are installed for a maximum of 2-3 weeks, and not for a long time).
Rules for caring for a metal-ceramic tooth crown
- Fixed dentures (crowns) do not require individual care; standard hygiene procedures are sufficient. It is mandatory to brush your teeth in the morning and evening, just before bed. It is advisable to use special rinses to clean the mouth.
- The toothbrush should be soft and not injure the gums. It is recommended to use dental floss to remove food debris and plaque.
- For preventive purposes, it is recommended to remove tartar once every six months and grind high points on the dentures in a clinical setting.
- At the first sign of pain, you should visit a doctor. The cause of pain may be the onset of a new pathology or poor-quality installation of a metal-ceramic prosthesis.
- Clients should be aware that when undergoing an MRI, if necessary, the prosthesis may appear as a defect in the image, so they should inform the doctor about the presence of a crown before the procedure.
What hygiene products are needed and can be used?
What hygiene products are needed and can be used?
| NAME | DESCRIPTION |
| Toothbrush | The bristles should be soft or medium hard. Too hard ones can damage the material and leave small scratches on it, in which plaque will accumulate. The use of an ultrasonic or mechanical brush is allowed, but it is very important to carefully select attachments - they should not have plastic elements (often used to better clean or whiten teeth). |
| Toothpaste | It is better to use prophylactic toothpaste WITHOUT abrasive substances - they can damage the materials. |
| Irrigator | It will allow you to remove food debris from the interdental spaces, especially if several crowns are installed in a row or dental bridges are present - in such a situation, a stream of water will remove food debris from under the structure. |
| Mouthwash | It should be selected in accordance with existing oral problems - for example, to combat gum inflammation, to strengthen enamel or to prevent plaque accumulation. That is, regardless of whether you have dentures or not. |
Repair procedures for a metal-ceramic tooth crown
A common problem that patients present with is the occurrence of chips on their dentures. The restoration procedure depends on the size of the defect and how deep it is. Common cases are as follows:
- small nicks are removed quickly. The dentist polishes the chipped edges, processes them, and this completes the procedure;
- a medium to large nick, if the metal frame is not affected, requires restoration of the ceramic layer. The specialist uses a gel composite to restore the ceramics, selected by color. Polishing and grinding are carried out;
- in cases where the metal layer is exposed, the application of a metal frame is required. Opaque is applied, after which the ceramic layer is restored;
- cracks in the metal frame of the crown require complete replacement.
Metal-ceramic crowns are considered the most popular type of prosthetics. If you visit the dentist once every six months and take proper care of your oral cavity, the life of the crowns will be long, without the occurrence of defects.
The price of such a metal-ceramic crown directly depends on many components: the cost of the metal alloy from which the frame is made, the cost of the ceramic layer, payment for the work of the dentist, dental technician, patient characteristics, and the cost of additional services. Therefore, the cost is calculated for each case individually.
