"Practice of Dr. Sklyaruk" provides a wide range of dental services, and prosthetics is one of the most sought-after among them. We offer many prosthetics options. Installation of a metal-ceramic or zirconium crown is a current offer to date for patients who have lost most of the tooth or those who want to hide his full lack of it, improve the aesthetics of a smile. However, when choosing a material for prosthetics, clinics clients are often lost, do not know what to answer the doctor. Prices are different, which means, the quality, testimony and contraindications should be different? In order to be confident in his choice, it is better in a relaxed atmosphere, at home, read that microprostheses are made of the above materials, which characteristics should be relying and so on.
What is the difference between a zirconium crown from metal ceramics?
The main difference is in the material from which they are manufactured. If the metal is based on the metal (the alloy of chromium and nickel, chromium and cobalt, gold, platinum), and from above the ceramic layer, then we are talking about metal ceramics. Metal frame has a thickness of 0.3-0.5 mm, and an external coating is 1-1.5 mm. Two layers are needed to ensure the strength and aesthetic attractiveness of the product.
In the manufacture of zirconium microstheses, zirconium dioxide is used, that is, the compound of the eponymous metal with oxygen. In the process of obtaining it is stabilized by yttrium oxide.
Is it possible on the basis of this information to draw conclusions, what is better, metal ceramics or zirconium on the crowns? Some, yes. The thickness of the metal ceramics is increased in comparison with that of their opponent (the difference is 0.5-1 mm, and sometimes more), which means that the tooth depug out and the stratification of a large number of its tissues will need. Another conclusion - zirconium crowns are not inherently possible, despite the fact that the material according to properties and appearance cannot be attributed to the metal or metal alloy.
Crowns made of metal ceramics and zirconia: differences in the method of manufacture
Making technologies are different, which affects the operational and aesthetic properties of products. Metal ceramics are obtained from alloy metal from which the crown frame is cast. The product is polished, further the future frame of the prosthesis is treated with a sandblasting machine in order to enhance its adhesion with the upper ceramic layer. Then the cap is cleaning and thermal processing. The coating is made of a special powder, which is mixed with water to obtain a paste-like mass, then applied to the metal frame. Then all this is subjected to vacuum firing, and the procedure is repeated. Next is applied dentine and enamel mass, the finishing layer, to whose color chooser is very carefully.
Zirconium in the process of compound with oxygen turns into colorless crystals, which have very important properties for dentistry. For example, a high melting point allows a specialist to be confident that the frame will not be damaged when the upper ceramic layer is firing. High strength allows not to lose a product of its form and integrity at daily loads.
Reflecting on what crowns are better, metal-ceramics or zirconium dioxide, it is worth remembering that the last dental is also called "white gold" due to the fact that the material itself has white color with a matte gloss. That is why it can be used for prosthetics without subsequent application of the masking layer.
Metal ceramics and zirconium crowns: comparison for service life
The duration of operation is the most important characteristic for orthopedic design. The results of the modern dentist-orthopedic can be enjoyed today for decades. But none of the specialists will give a life guarantee on its "brainchild". Too many factors affect the duration of the operation of the product, in particular:
- the presence of inflammatory and other diseases of the oral cavity;
- The ability and desire of the patient to carry out daily hygienic procedures;
- Harmful habits (smoking, splitting nuts with teeth, etc.);
- Accuracy of the patient when eating food (exclusion of progressing too hard products).
In addition, it is important at each stage of the work to comply with technology, to properly prepare the patient's mouth cavity to prosthetics and reliably set the design. In the clinic "Practice of Dr. Sklyaruk" with this, experts cope with "Hurray". But for the above points, they cannot vouch. Therefore, it is believed that on average, the metal-ceramic product serves 7-10 years, and zirconium - 15 years or more. In practice, the life of both options can be much longer - and 20, and 50 years. Choosing a zirconium crown or metal ceramics, it needs to be aware. Much depends on the patient himself.
What is better in aesthetics: zirconium or metal-ceramic crowns?
Metal frame will always be shifted. Therefore, when solving the problem, to put on chewing teeth, zirconium crowns or metal ceramics, you can give preference to the last option, but as a prosthesis of teeth in the smile zone it is better to use the zirconium design. Only to improve the aesthetics of the orthopedic design of zirconia dioxide, it is necessary to cover its layer of porcelain. Then the color and transparency of the prosthesis for the dental units of the front area will correspond to the natural.
Orthopedic products on a metal framework after a while (3-5 years) give the gum Dark (gray, shiny) shade. This is due to the fact that soft tissues are brightened, and through them becomes visible metal. Aesthetics worsens.
Metal ceramic crown or zirconium dioxide: What is safer?
Institution for the body is characteristic of all modern materials, including the above. However, the reaction of the body of each person is individual. If the patient has intolerance of any metal (most often cobalt), then choosing a crown on tooth (zirconium or metal ceramics), products are based on allergen. This will help to avoid the development of such unpleasant symptoms as:
- Pain during feeding;
- burning in the area of the tongue on the mucous membranes;
- hypersalization (overweight saliva);
- Highland edema, dysen, nose;
- rash on the skin;
- The appearance of an unpleasant taste in the mouth;
- Increased body temperature within 37-37.5 degrees Celsius;
- cough, sore throat;
- Strong gantry bleeding.
Allergies may not appear immediately, even after months and years after installation. To avoid such trouble with people with hypersensitivity, it is better to give preference to structures based on compound of zirconium with oxygen.
Metal ceramics and zirconiums for crowns: comparison for the price
Most often, patients confuse precisely cost. What is the difference between the crown of metal ceramics and zirconium? After all, both beautiful, we must serve for a long time, can be installed in any defect, and the price is different. It's all about the value of the materials themselves, the cost of production and installation that strongly affect the result. Domestic products are manufactured using a CAD / CAM computerized system, using 3D modeling technology. The process takes only 1-2 days plus a few days to prepare the oral cavity. Metal and ceramics are made in a dental laboratory longer (7-10 days). Thanks to the automation of the process, the human factor is eliminated, the accuracy with which the orthopedic design is adjacent to the gum, which prevents from the fall of food to it, the mobility of the prosthesis, and therefore inflammatory reactions in the cavity and mouth, the unpleasant odor, etc. Increases the cost of the zirconium crown.
If the budget does not allow you to install a nonmetral structure, and there are no contraindications to the wearing products based on alloys, then the question is which crown is better, metal-ceramics or zirconium, disappears. It is better to put a time-tested prosthesis from the alloy of metals coated with ceramics than to slow and remain without adequate orthopedic care. But there is another option - to take advantage of the possibility of treatment in installments and credit provided by our clinic, and establish a more modern option - a product from zirconium dioxide.
Choose crowns: What is different from zirconium metal ceramics?
These two material differ in quality, appearance, indications and other characteristics. Based on the foregoing, you can draw the following conclusions:
- If the patient focuses on the practicality and safety of the product, then the specialists of the Clinic "Practice of Dr. Sklyaruk" are ready to offer hypoallergenic modern material, which will save its time and will retain the nerve cells in the same amount - zirconium dioxide.
- In the case when the visitor dentistry rejects all the "new-fashioned" and, in his opinion, not proven generations, his relatives, friends and neighbors, we recommend to stay on the old good "classic" - a prosthesis based on metal and ceramics. Moreover, our specialists are masterly owned by the installation technology and provide a guarantee for their work.
- Those who are important aesthetics so that no one notice "substitutions", it is better to choose a crown, from which the metal will not be shut. The lighting ability of zirconium dioxide (coated) is close to that in natural teeth, which means that it will be unrealistic to distinguish the prosthesis.
- For the price of zirconium structures always lose their opponents on a metal basis. However, taking into account the longer service life and possible complications of the amount spent on prosthetics, treatment may eventually be the same.
If you are still in doubt, you want to learn how to distinguish a zirconium crown from metal-ceramics, sign up for reception to our doctors. You can do this by calling 8 (499) 955-43-04. Call or order a callback on the site - we are always in touch with you!
At the heart of the metal-ceramic product - durable cast frame from one metal or alloy, which is covered with ceramic material, forming a 1.5-2 mm thick design.
The crown on the basis of zirconium dioxide, having a thickness of less than one millimeter, is characterized not only by durability, but also hypoallergenia, durability, safety, and in appearance practically does not differ from healthy teeth.
The main differences of zirconium crowns from metal-ceramic
To understand, zirconium dioxide or metal ceramics - what is better, we give comparative characteristics for the following aspects:
- Tuba . The metal frame, which gives the strength of the metal ceramic crown, requires significant turning of the tooth. In the case of the use of crowns based on zirconium dioxide, which has high strength, the tooth ripper is minimal. In numbers - the thickness of the zirconium dioxide - 0.3 mm, and from the metal alloy - 0.6 mm, i.e., in the case of the use of zirconium dioxide from two sides, the tissue is removed by 0.6 mm of bone tissue;
- Light traffic . Metal-ceramic crowns do not have transparency inherent in the tissues of a living tooth. Zirconium dioxide, on the contrary, has good traffic permeability. The crowns made of it look natural and indistinguishable from the "native" teeth. Even in ultraviolet light (in a nightclub), nothing will give the secret of a new smile;
- Allergic reactions . Metal structures can cause allergic reactions. Zirconium dioxide is a biocompatible material and does not cause allergies;
- Strength . Metal frames are stronger than zirconium dioxide frames. However, this feature is important when using bridge prostheses, during prosthetics by single crowns, this factor does not have a significant impact on the service life;
- The ability to set the crown without depulpation . Metal ceramic crowns have good thermal conductivity. To the tooth under the crown did not react to hot and cold, you need to pre-dry it ("Remove the nerve"). Low thermal conductivity of zirconium dioxide, as a rule, allows you to maintain a live tooth under crown without the risk of painful sensations on high and low temperatures;
- Production accuracy . The frame of metal ceramic crowns pays dental technician. The accuracy of the manufacture can affect the human factor. Production of zirconium dioxide crowns - a process controlled by a computer (CAD / CAM technology). It provides the accuracy of the "landing" crown and good fit to the treated tooth. There are no gaps between the tooth and the crown, therefore, the crown does not fall bacteria and the caries does not develop.
Among the advantages of zirconium prosthetics are distinguished:
- High strength indicators, manufacturing accuracy. In order to avoid medical errors, a computerized CAD / CAM prosthetics technique is used. The data obtained in the process of scanning the oral cavity is programmatically processed, as a result, a digital model of the prosthesis is created. Based on the model using machine equipment, an individual crown is manufactured.
- Aesthetic appearance (Lights are missing, indistinguishable from native teeth).
- Hypoallergenia, safety of material for gums, oral cavity and the whole organism.
- No need for severe tooth shaking.
- The high density of fit to the tooth (due to this minimizes the likelihood of the development of inflammatory processes).
- Antibacterial effect, due to which the risk of caries is reduced.
- Security and ease of installation.
- Invariance (resistance) of color.
- The existence of prosthetics of chewing, front teeth.
- Long-term warranty (on average - 20 years) on artificial zirconium teeth.
The key lack of zirconium products is a high cost explained by the high-cost metal, the complexity of manufacturing technology.
Pros and cons of metal-ceramic crowns
Metal ceramics is installed in the loss of one or more teeth, their partial or complete destruction due to caries, the need to eliminate the defects of the row, create a support for bridge structures, pins prosthetics, installation of implants.
The advantages of metal ceramics are to:
- Strength, reliability, durability (service life - about 15 years).
- Excellent resistance to intense chewing loads, factors capable of changing color changes, displacement of the structure.
- The absence of a negative effect on the state of the oral cavity.
- The possibilities of prosthetics of any dental unit, choosing from a wide range of shades for the optimal color combination of a prosthesis with nearby teeth.
- Maintainability at chips.
- Excellent hygienic indicators, minimal rejection risk.
- Price availability.
The disadvantages of the metal ceramic crown include:
- The need to perform preliminary intensive tooth scolding (approximately 2 mm on each side), depugnation (nerve removal, channel cleaning, sealing). If you do not remove the pulp, the slightest error of dental manipulations will lead to a burn and severe pain.
- Translucent of the carcass, which does not miss the light, as a result of which aesthetics worsen.
- The risk of erasing the upper layer, the appearance of cracks and chips on the artificial teeth, lowering the gums, the appearance of the mucous membrane in the contact places of the crown with the gum, the development of allergies. Allergies manifests itself by local itching, burning, appearance of an unpleasant taste in the oral cavity, the swelling of the language.
- Damage to teeth, located opposite the rigid prosthesis.
In the zirconia design, in contrast to metal-ceramic prosthetics, at least minimizes of contraindications, in particular, the zero risk of allergies. There is no need to depug, strong turning of the living tooth. The product is faster, it does not differ from natural teeth. The cost exceeds the price of metal ceramics several times.
When installing metal ceramics, there is a risk of allergic exacerbations, translucent the basis of the design. At the preparatory stage there is a need to remove pulp, removing several millimeters of toad fabric. Significant advantage - available cost.
What crowns are better: zirconium or metal-ceramic?
The optimal method of prosthetics, the list of applicable materials is selected during consultation with the dentist, taking into account the individual characteristics of the patient, its wishes and financial capabilities.
Zirconium oxide, having similarities with real teeth, is installed in the front, chewing area, has excellent strength, withstands increased loads. If the patient suits the price of prosthetics, it is advisable to give preference to zirconium products.
At first glance, the crowns of metal ceramics and zirconium are not much different from each other. When it comes to price, the difference becomes very tangible. In this article, you will learn why zirconium dioxide products are more expensive and in what cases the use of a particular material is more justified.
Metal ceramics and zirconium dioxide
"What crown is better: metal ceramics or zirconium?" - Frequently asked patients at the reception at the orthopedic dentist. The question is not entirely faithful: for the production of prostheses, no zirconiums are used in pure form, but dioscription (oxide) zirconium - a complex compound of metal with oxygen. As a result of the chemical reaction, colorless crystals are obtained, which have an outstanding margin of strength and have a high melting point. Depending on the crystalline form, the scope of the material is determined. For example, the cubic crystalline shape of zirconium oxide is used to produce artificial diamonds, and the so-called zirconium ceramics used in dentistry is the derivative of the tetragonal form of crystals. Crowns can be made entirely of zirconium dioxide or have only a basis from this material.
Metal-ceramic prostheses consist of a metal frame and ceramic cladding. Usually, nickel-chrome or cobalt chrome alloys are used for the production of the base. In contrast to zirconium dioxide, a pure metal frame has a dark color and shines through the ceramics layer. Read more about metal ceramic crowns in a separate article.
The choice of design material in this case depends on a number of factors that should be stopped.
Qualitative materials indicators
Prostheses from zirconium dioxide are almost perfect, thanks to their properties, it is used including for the production of implants and abutments. On the other hand, the answer to the question is, it is better from the point of view of the cost, is also obvious. Many patients do not suit this option due to large financial costs, so they choose metal ceramics as a cheaper solution.
Selection of materials on chewable and front teeth
If prosthetics are carried out in a smile zone, then in this case it is better not to save. Zirconium prostheses benefit over a variety of reasons.
- Such a crown requires minimal turning of the teeth (read more about the installation of zirconium dioxide crowns in the article).
- The frame of metal ceramics will be shifted to the light. Crowns with a zirconium basis and with ceramic facing not distinguish from natural teeth.
- Due to the oxidation of the metal, a blue edge often appears on the site of the gums and crowns, zirconium dioxide eliminates the occurrence of such a situation.
If you put a prosthesis for chewing teeth, then a functionality is coming to the fore. Zirconium - strong and durable. However, the metal ceramics has good functionality and durability. If the treatment budget is strongly limited, then metal-ceramic prostheses can be the best option.
When prosthetizing the front teeth, most specialists recommend to make a choice between solid ceramics and ceramic structures on a zirconium dioxide framework. With all the benefits of the latter, the zirconium in its pure form in the field of the front teeth is rarely used, as it has an unnatural white color and an opaque structure.
Metal ceramics or zirconia for implants
Both types of crowns are installed on implants. Recommendations here are exactly the same as in conventional prosthetics. If we are talking about the restoration of the front teeth, it is better to choose the designs of ceramics. If implants are implanted in the side of the jaw, the prosthetics can be carried out with metal ceramics or zirconia. At the same time, it should be understood that for the installation of a crown of pure ceramics, an appropriate abutment from zirconium dioxide is required: the classic metal in this case is not suitable as they will be shifted.
Publisher: Expert Journal of Dentistry StartSmile.ru
Material author: Ekaterina Gasparova
Frames from dental metal alloys
The frame for metal-ceramic design is made of cobalt and chromium alloys, nickel and chromium, and precious metals are used - gold, platinum, palladium. The thickness of the base is from 0.3 to 0.5 mm, together with the ceramics layer, the thickness of the prosthesis is about 1.5-2 mm.
Unlike composite materials, which are also used to restore crowns, and much cheaper, ceramics reproduces the color and structure of genuine toothbrush, while it does not fade and absorbs the coloring substances.
Metal-ceramic dental crown is a good option if you need to restore chewing teeth aesthetic and reliably and you have no allergies to metals. Metal-ceramic prostheses have the following advantages:
- Good aesthetic indicators. Qualitatively made artificial metal-ceramic crowns are practically no difference in appearance and functionality from natural teeth;
- Durable, capable of withstanding high loads during chewing, can serve over 10 years;
- The design retains its original color throughout the deadline;
- The ability to prosthetize any teeth;
- With small damage to the crown, the ability to restore it;
- Affordable cost of products;
- Stability resistance;
- Good hygienic indicators.
But metal-ceramic dentures have some drawbacks:
- In cases where the ceramic layer is damaged (happens), through the formed cracks and chips, a metallic frame can be cut;
- To install metal ceramics in most cases, it is necessary to remove the pulp and substantially displaced the biological crown (about 2 mm from all of its sides);
- In some cases, over time, the sinusiness of the mucous membrane can occur at the scene of the crown with gums;
- The frame material does not miss the light, therefore under certain lighting angles, the metal can be shifted through a ceramic coating. For this reason, the installation of metal-ceramic crowns on the front teeth is not suitable for all patients.
We study the subtle differences between metal-ceramic and zirconium crowns. Metal ceramics or zirconium is a question for a patient a question more than "be or not to be". Moreover, at first sight in the photo on the Internet there is no difference between them - both are at all - and the other is a prosthesis, fixing on a sharpening tooth and completely imitating its natural look. However, it is worth viewing the price - and it turns out that the zirconium crowns are almost twice as expensive. But why?
In more detail with prices for crowns can be found here ( Moscow ) and here ( St. Petersburg )
What is different from zirconium metal?
The crown is a metal frame that is covered with ceramic mass. In the case of metal-ceramic, the material for the frame is nickel chrome or cobalt-chromium alloys. They are durable, and therefore copble with the same chewing load as natural teeth. However, they are dark in themselves. Because of this, even with ceramics, which exactly as possible corresponds to the color of the patient's native teeth, such crowns do not look very natural - there is no same transparency as a natural tooth.
Zirconium dioxide, which is a material for the framework of zirconium crowns, on the contrary, is blundering. Exactly the same transparency as with natural enamel, it's still not to achieve with him, but the zirconium crown looks much natural. By the way, they are made not from pure zirconium, but from the compound of metal and oxygen.
How do crowns make?
The difference between the crowns is also manifested in their production. Chromium alloys with nickel or cobalt are predominantly metallic, and look like a metal bar, from which the frame of the crowns later differ. But with the zirconia the situation is much more interesting. The chemical reaction between oxygen and zirconia leads to colorless crystals, which differ in two important properties:
- High strength that allows you to withstand large and constant loads;
- High melting point, that is, they do not melt from the temperature of the human body.
Tetragonal form crystals and become material for the manufacture of the crown. Moreover, in contrast to alloys, the crown can be entirely made of zirconium. In this case, the ceramic coating is not required - it will still be white as native teeth.
What is better - metal or zirconium?
This question always ends with an orthopedic dentist when the time comes to choose crowns. Does the highest price guarantee the exceptional quality? We will understand on specific examples.
- Life time - Zirconium dioxide crown is much stronger than metal-ceramics, and therefore hesitifically for at least 20 years. The metal-ceramic crown on average serves 10 years, with very careful care of the oral cavity - about 12 years.
- Side effects - Chromium alloys with nickel or cobalt can oxidize in the mouth over the years, and are also able to cause allergies. Zirconium - hypoallergen and completely bioinerten, that is, does not enter the oxidation reaction.
- Aesthetics - Metal Cram will never look like a natural tooth, because Her frame is dark. Zirconium as a frame gives a more beautiful view, but if you make a crown from it entirely, then its appearance will also be far from naturalness.
- Location - That is why metal-ceramics, and zirconia are better to use to restore chewing teeth, and in the smile zone install all-tempered crowns.
So what crown is better? Only your dentist-orthopedist can answer this question, because when choosing a prosthetics method, it relies on the diagnostic data, the state of the oral cavity, etc. But if we talk about the price, then, of course, the metal ceramics is more accessible - the cost of 1 thing begins from 8-10 thousand rubles. And the zirconium crown will cost at least 15-20 thousand rubles. The highest price for metal ceramics is about 50 thousand, and on zirconium - about 60 thousand.
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The choice of modern materials used in dental prosthetics is quite wide, which complicates the decision-making.
In order to do not have discomfort in the process of wearing the crowns, it is recommended to familiarize yourself with the features, differences, the main advantages and disadvantages of popular variants - metal ceramics and zirconium dioxide.
On the example of the analysis of crowns from metal ceramics and zirconium dioxide, you can estimate the advantages and disadvantages of several signs and understand which difference between them:
|Comparative analysis Materials , Used в Prosthetics|
|Title sign||Metal ceramics||Zirconium|
|Durability||8-15 years old||15-20 years old|
|Appearance||Acceptable aesthetic indicators||High aesthetic indicators|
|Price||Crown with frame (cobalt with chrome) - from 4500 rubles||Cost starts OT. 16000 rubles|
|The need for turning||When installing metal ceramics, it is necessary to determine the tooth (approximately 2 mm on each side)||The tooth is calculated with the removal of a slight layer of bone tissue, in contrast to metal-ceramic products|
|The need for depulpion||In most cases, depulpyrus is required (nerve removal, channel cleaning, fillings)||it is possible to install on a live tooth, which eliminates the process of nerve removal|
|Allergy||Possible allergic reaction to metal||Material absolutely hypoallergenic|
|Manufacturing time||Average 7-10 days||Creating a crown on 3D modeling technology is carried out in 1-2 days plus a few days on the preparation of the oral cavity|
|The possibility of installation on the front / in the chewing teeth||Metal ceramics suitable for prosthetics of chewing teeth and front cutters||Zirconium dioxide can be used to prosthetize chewing and front teeth|
|Care||Simple care (negative effect on color has smoking and coloring products)||Care rules are limited to compliance with hygienic procedures.|
Undoubtedly, when choosing a material, their advantages and disadvantages should be taken into account, features of operation.
However, it should not forget that other factors affect the wearing period of prosthesis, in particular compliance with food and hygiene. Durable metal ceramics will not be able to protect the tooth and dentin in the case of the formation of the gap between the soft cloth and the prosthesis or during the deformation of the material.
The material includes a metal combination (alloy or one type) and ceramics. Externally, the crowns are very similar to natural teeth, which allows them to be used to prosthetize the front incisors and chewing molars.
The basis represents a metal frame (thickness 0.3-0.5 mm). The coating from the outside is made from ceramics (thickness 1-1.5 mm).
In the process of manufacturing the framework, the following types of metals are used:
- Platinum and others.
Products made of metal ceramics have the following predominant characteristics:
There are from metal ceramics and disadvantages, they need to be considered when choosing a material for the crown. A significant minus is the need to deterulate the tooth in the process of installing the structure.
With bone tissue is removed by a layer of about two millimeters, and this is a lot. In addition, in many cases the deposition procedure is performed.
Among other things, experts allocate other minuses:
- The material does not transmit light, so the outlines of the metal frame are sometimes viewed on the surface of the crown;
- On the border with gums, the sinusiness of soft tissues is formed due to prosthetic pressure;
- Over time, the framework may be barcas, which will lead to the development of caries or other dental diseases.
Installation of metal ceramic crowns is recommended by experts:
- in the destruction of most of the tooth bone tissue (more than 50%);
- If one or more teeth are lost;
- with loss of fragment of bone tissue due to progressive caries;
- In order to eliminate the aesthetic and functional problems in the dental rows;
- To install prostheses and when implantation (landing on the pin).
Experts allocated limitations regarding the installation of metal ceramic crowns:
- diseases of the central nervous system;
- the presence of chronic pathologies of periodontal;
- bite anomaly;
- the presence of infectious diseases or the period of rehabilitation;
- aggravation of diseases of the mucous membrane;
- involuntary grinding teeth;
- Pregnancy period.
An unambiguous limitation to the use of metal ceramics is allergic to metal.
Crown of metal ceramics on clearance on the front teeth
Features of zirconium crowns
Zirconium is used in dentistry for about two decades. The popularity of the material is due to the ability to transmit light, which makes the prosthesis as close as possible on the external signs of the natural tooth.
Crowns made of zirconium dioxide have a number of benefits:
Almost the only disadvantage of the crowns are their big cost, which is due to the complexity of the manufacturing process and the use of 3D innovative technology.
The installation of prostheses made of zirconium material is recommended in the following cases:
- in the presence of aesthetic defects of individual teeth (bone cloth problems);
- If the teeth implantation is required;
- to correct dentition defects;
- In those prosthetics, when to use crowns from another material there is no possibility.
Contraindications to the installation of zirconium crowns are a bit, but they should be taken into account when conducting prosthetics.
With a pronounced deep bite and involuntary teeth, the material will be raised rapidly, which will require re-treatment. Do not choose zirconium dioxide and in the case when the height in the zone of the bridge contexts is insignificant (small teeth).
Do not choose zirconium dioxide and in the case when the height in the zone of the bridge constructs is insignificant (small teeth)
What to choose?
When installing crowns
When choosing a material for crowns, you must be guided by the following criteria:
With excellent aesthetic qualities, zirconium loses in strength, while the competing product has a more affordable price policy.
reliability of design;
- safety and wearing safety;
- Available cost.
When analyzing metal ceramics and zirconium dioxide, some duality is observed.
With excellent aesthetic qualities, zirconium loses in strength, while the competing product has a more affordable pricing policy.
An important factor is the degree of safety of the installation, in the case of a zirconium prosthetic tooth is subject to minimal heating, and metal-ceramics involves depulpation.
Based on the outlined information, it suggests that the prosthetics of teeth performing chewing function are more suitable for metal-ceramic products, and for the front zirconium crowns.
Before you give preference to any material, the patient is reasonfully consulted with the doctor. The specialist will help to understand this issue, will advise what crown it is better to establish, given the condition of the bone tissue of the tooth, dentin and other factors.
Crowns made of metal ceramics - the disadvantage is the appearance of black border along the gum edge
For the prosthetics of the front teeth, zirconium dioxide is more suitable
Despite the wide range of material suitable for the manufacture of prostheses, only two types are more suitable for implantation: metal-ceramic and zirconium.
When applying other options, different difficulties occur.
For example, chips and cracks appear on ceramic products, plastic is inclined to change the tonality, absorb odors, the metal is not suitable at all combined with pins.
Given the advantages and features of metal ceramics and zirconium dioxide, it is possible to summarize that the second option is more suitable for the prosthetics of the front teeth.
This is explained by the lightweight material of the material, which allows you to artfully imitate natural teeth.
In the case of an installation of a metal-ceramic product, a problem may occur with the lumen of the frame and the formation of the gums of the gums on the junction of the crown with a soft cloth.
Both options are ideal for prosthetics of chewing teeth. Therefore, when choosing a material for implant, the patient should be guided by budget and individual preferences.
Under the article posted user feedback, which share their impressions about metal ceramics and zirconium dioxide. Information may be very interesting and useful for those who only plans prosthetics.
Metal-ceramic or zirconium crowns - what to choose?
When the tooth is destroyed more than half and sealing can not help, a crown is required. Most often, the patient needs to make a choice between two design materials:
- Metal ceramics - the optimal combination of price-quality;
- Zirconium dioxide is the best material in orthopedic dentistry.
What is the difference between them? Why is metal ceramics practically 2 times cheaper than zirconium? Is it worth overpaying? What crowns are better for the front or chewing teeth?
This article will help get answers to these questions to make a conscious choice.
Metal ceramics VS zirconium dioxide: features and differences
Well-spent technology-tested technology. According to the individual cast, manually manufactures the metal frame ("cap"). It is facing the ceramic mass. Then burns in the furnace at a temperature of 900 ° C. The finished product is put on a pre-sharpeble problem unit.
The frame is made from:
- non-denominated metals (nickel-chrome, nickel-cobalt, cobalt-chrome alloy) - allow you to save, but there is a risk of allergies;
- noble metals (gold alloy with platinum or palladium) - costs more expensive, but the risk of an allergic reaction is lower;
- Titan - average value option (orthopedic product is densering the neck to the neck, does not turn back).
The classic two-layer distinguishes (the metal is in contact with the base of the gums) and with the shoulder mass, which covers the metal base and imitates soft oral cavity tissues.
In dentistry, zirconium dioxide stabilized with yttrium oxide is used. This is a white bioerity material that cannot be oxidized and does not cause allergic reactions.
It composition: ZrO2 - 95% (zirconium dioxide), Y2O3 - 5% (yttrium oxide), Al2O3 - <0.4% (aluminum oxide).
In orthopedic dentistry, 2 types of zirconium dioxide crowns are used:
- Two-layer. Consist of zirconium frame and ceramic / porcelain spraying. They look as natural as possible.
- Whole. Made completely from zirconium oxide. The absence of ceramic cladding eliminates the appearance of cracks or chips. But such prostheses are less transparent and aesthetic than two-layer.
|Life time||from 5 to 10 years||from 10 to 20 years|
|Enamel court||Significant (from 1.5 mm)||Minimum (up to 0.5 mm)|
|Depulpation||Held in most clinical cases||Not required|
|Hypoallergenicity||Metal allergy is possible||Yes|
Zirconium Dioxide: Benefits and Disadvantages
+ Tight fit of the frame to the teuba . The more accurately the prosthetic design is adjacent, the better the tooth remains under it. The metal-ceramic prosthesis frame is made by the technician manually, and the zirconium-machine with digital control (CAD / CAM), which eliminates any errors.
+ High aesthetics . Due to excellent light transmission, zirconium dioxide gives a more aesthetic result. Crowns are practically no different from natural teeth in color and transparency with any lighting.
+ Lack of thermal conductivity . There will be no reaction to hot or cold, which is important when prosthetizing a living tooth.
+ Minimum enamel clip . Zirconium crowns are thin, which makes it possible to avoid significant dentin composite. The need to remove nerve is eliminated. Installed on a live tooth.
+ Hypoallergenicity, biocompatibility . Does not cause an allergic reaction to the metal. It is preferable for patients with diseases of the oral mucosa and smokers.
- High price . The only disadvantage of zirconium dioxide is the cost, which is 2 times higher than the price of metal ceramics.
The opinion of the doctor!
Is there any contraindications to install zirconium crowns?
Since zirconium dioxide is very solid, it is not recommended to install orthopedic structures from this material to patients with bruxism and increased enamel-erasing.
Metal ceramics: advantages and disadvantages
+ Increased strength . Without problems withstanding significant chewing loads.
+ Satisfactory aesthetics . If everything is done correctly, it is difficult to distinguish from your own teeth.
+ Affordable price . The average cost of a metal ceramic crown in Moscow - 6000 rubles.
- Significant sniff . Move at least 1.5 mm solid tissues. Frequently required depugthenia, i.e. Nerva removal. Such a tooth is more fragile, because it does not receive power. There is a risk of granuloma - inflammation of bone tissue around the tops of the roots.
- the appearance of a dark edge . Oxidation processes begin in the metal. In the place of contact of the gums with a crown appears a bias.
- Allergic reaction to metal .
What crowns better put on the front teeth?
When prosthetized in the smile zone (fangs and cutters), impeccable aesthetics are very important, so it is better to establish two-layer crowns from zirconium dioxide. They do not distinguish them from their teeth. During a conversation or smile, no one will understand that artificial teeth are standing.
What crowns are better for chewing teeth prosthetics?
With non-removable prosthetics of chewing units (molars and premolars), high aesthetics are not so important, so you can save and put a metal-ceramic crown. Still, if the budget allows you to restore the teeth in the chewing zone, it is better to establish whole crowns from zirconium dioxide, i.e. Without a ceramic coating, on which cracks or chips can appear with increased chewing load.
If you decide to put a metal-ceramic crown on the chewing tooth, then do it in a good clinic. When using poor-quality ceramic facing, it can crack or barrier with increased chewing load.
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If the dentist says that the crowns need to be put, the patient has to independently make a difficult solution regarding the material. Of course, the doctor will give several recommendations, taking into account the depth of the defeat and the location of the tooth. But in the end, the patient will still have to decide for itself: zirconium crowns or metal ceramics - what is better?
What are the advantages and disadvantages of zirconium crowns?
Zirconium crowns are used to restore almost completely destroyed, strongly damaged teeth. Caps of zirconium dioxide is recommended to be put after the treatment of root channels, as well as when implanting (for installation on the pins).
The main advantages of zirconium crowns:
- wear resistance;
- the possibility of selecting the shade and structure;
In modern dentists, CAD / CAM technologies are used, which guarantee an ideal landing, the most natural appearance of microprotheses.
But orthopedic structures from zirconium dioxide have some drawbacks. The first thing to pay attention to is the type of finished products. So, for example, crowns from ceramics are translucent. This allows you to make a shade of artificial material similar to natural enamel.
Zirconium oxide is not as transparent as china, so some patients do not like the resulting result. Also, zirconium microstheses can cause the destruction of the natural enamel of the surrounding teeth. True to ensure real wear, may be needed for many years.
Indications and Contraindications for installation
Zirconium crowns - the optimal choice for microprothesising chewing teeth. Since the material is ultra-shown, it can even withstand even intensive loads. Zirconium designs are shown to patients who suffer from bruxism.
The only alternative in this case is the crown of precious metals. Other indications for the installation of zirconium microstheses:
- replacement of teeth damaged by more than 50%;
- protection of elements of a tooth row with cracks, chips from further destruction;
- the need to cover the dental implant;
- Anomalous shape and color of the cutter or molar.
Zirconium dioxide crowns can also be used to make bridge prostheses.
There are no obvious contraindications to microtosis with zirconium caps. In general, dentists recommend thinking about choosing another type of material to patients who need to restore only one front tooth.
Even the perfectly selected shade of enamel can change the color at a certain lighting. This means that microprothesis will differ from the surrounding elements of the tooth row, but only under certain conditions.
Contraindications are both problems with the hardness of natural enamel, gum sensitivity. If the patient is clearly expressed to demineralization, erosion is present, it is better to choose less durable and hard material.
How long do you serve?
Despite the strength and wear resistance of zirconium, no dentistry will give a lifelong warranty on the manufactured crown. After all, the final service life directly depends on the state of the oral cavity, the presence of a natural or artificial tooth on the opposite jaw.
The warranty period for zirconium microtheses on average is 5-7 years. But in patients who observe the oral hygiene, regularly pass professional cleaning in the hygienist, zirconium dioxide caps serve 10-15 years.
The material itself is unlikely to collapse during this time, but the edge of the gum can rise. The patient will have to order a new product or hand out for fitting the existing lining.
Pros and cons of metal ceramics crowns
Metal-ceramic crowns for several decades remained a gold standard in the microstheses of the teeth. Due to modern materials, the optimal ratio of strength and aesthetic type of insertion is achieved.
The inner core of the orthopedic product is made of metal, and the outer shell is made of natural graffiti ceramics. The metal is not visible to others, but ensures the wear resistance of the crown. Ceramics is applied with a thin layer and adapts to the color of neighboring "living" teeth.
The type of materials used depends on the total value of the microprotence. Dental technician can use both cheap cobalt chrome and precious alloys.
Advantages of metal ceramic crowns:
- The possibility of restoration of the tooth, destroyed by more than 70%;
- use on pins, as part of prostheses;
- Biocompatibility (provided that the basis of the microprotease is chosen pure gold).
The crown with a white gold frame will also not irritate the gums, will exclude the development of the metal taste in the mouth.
As for the shortcomings of the caps of metal ceramics, the patients often complain about an inesttic look of a smile. Ceramics, powered by a metal frame, is absolutely opaque. If only one front tooth is renovated, the difference with "alive" cutters will be visible to the naked eye.
Also, after a few months, the socks of the crown brightened the lower part of the gums, through the ceramics the gray border appears. The smile becomes "artificial", unattractive.
Also, despite the inesthetics, high-quality metal-ceramic orthopedic products have a sufficiently high price. Sometimes the final value of microprothesis is correlated with the installation of the installation of modern all-ceramic crowns.
Other flaws of metal-ceramics caps:
- The risk of the tip of the top layer of the cap during the biting of solid products;
- The need for spilling almost the entire layer of natural tooth enamel;
- The risk of rejection of the structure (subject to the use of cheap metals).
Nevertheless, metal-ceramic crowns remain a budget choice for installation on chewing teeth.
Indications and Contraindications for installation
The dentist can advise the installation of a cap from metal ceramics to patients who do not suffer from allergies and want to put a design, tested.
Here is an article about what to do if you have allergies to metal-ceramic crowns.
Main readings for microprothesising:
- The tooth is destroyed almost to the ground;
- Sealing material occupies the entire cavity of the natural coronal part;
- the fracture of the molar;
- anomalous sensitivity of enamel;
- Destruction of an old crown.
Contraindications include allergies to metals (the problem is solved by the manufacture of gold, silver or platinum frame). It is also not recommended to put metal-ceramic crowns on the front teeth to patients with which an aesthetic factor is important.
Most dentists give a ten-year warranty on installed metal-ceramic crowns. But in fact, orthopedic products can serve over 50 years. For the service life directly affects the material from which the base of the cap is made.
So, for example, a decade-old frontier overcomes almost 97% of crowns on pure gold frame. But even if the foundation is chromium-cobalt, 90% of patients can count on the fact that the installed design will last longer than 10 years.
The most frequent defect of metal-ceramic crowns is the chip of the upper ceramic coating. To prolong the service life of the cap, it is necessary to abandon the discharge of solid items, products.
Those who suffer from bruxism are recommended to wear special silicone kapps overnight. You should also not forget about thorough daily oral hygiene, periodic preventive inspections from the dentist.
Metal ceramics or zirconium: what is better, the main differences, conclusions
Conducting a comparison of the two most common types of crowns, it can be said that zirconium oxide is more suitable for the restoration of the front teeth, as well as in a situation where the microtosis of all elements of the dentition is required.
Metal-ceramic caps are better to put on the molars, which are located behind the smile line. In general, dentists consider a multilayer structure of metal and porcelain outdated.
Zirconium oxide is sufficiently durable, withstands the load on the chewing teeth, but in contrast to metal-ceramics, hypoallergen, more aesthetic.
Comparative analysis of prices for the installation of crowns in Moscow clinics
Comparing the prices for the installation of metal-ceramic crowns, it is necessary to clarify that by default, patients are offered products based on non-precious metals. If the client wants to put a construction made using gold, the cost will grow 1.5-2 times.
The average cost of installing a zirconium crown for one tooth in Moscow is 20000-30000 rubles. Most dentists offer discounts on microprotezing of the entire dentition.
The average cost of overlays made of metal ceramics is 10,000-15,000 rubles per 1 unit. Subject to the use of precious metals and modern ceramics of natural shades, the price may increase to 40,000 rubles.
It should be borne in mind that the OMS policies and most of the standard DMS plans do not provide for the reimbursement of the installation cost of the crown. Deciding on the implementation of microprosthetics, it is necessary to obtain in advance in dentistry an individual estimate with the final cost of the procedure.