Crown metallic all-in-one: photo, reviews, installation. Making metal crowns on teeth
Metal crowns on the teeth are still popular, as nothing is more reliable and stronger in prosthetics. Such products were worn even for a long time by our ancestors, and they still continue to serve people with their longevity. Although the view of the crowns is not the most attractive, but the price and quality correspond to reality.
What is this
Solid cast crown is a metal product that is made from various alloys of titanium metal, chromium-cobalt, chromium-nickel, and its structure is cast completely. The main zone of use of this kind of crowns is prosthetics of the chewing type of teeth. This is due to their poor aesthetic component.
Crown( metal) cast-iron is considered a high-precision product, which though differs in metallic color, but very tightly sits in the oral cavity. Such crowns are an excellent choice for distant teeth.
solid-cast products Such material has several advantages, namely:
- Strongly adheres to dental tissues.
- Has safety( teeth do not break and do not chip).
- Features a natural anatomical shape.
- Small price compared to other analogues.
- Does not erase the opposing teeth.
- Greatly renews chewing performance.
Reasons for installing
Experts advise placing metal crowns only in certain cases if:
- destroyed exactly those teeth that are responsible for chewing;
- sections of the jaw line are markedly worn;
- tooth is severely damaged or injured;
- on the teeth are implants.
To deliver such a product, you need to visit at least twice the dentist-orthopedist. First, the doctor will get acquainted with the x-ray images of the oral jaw, then he will begin the caries treatment of those teeth where the crowns of metal will be installed. From the place where the turning or preparation is planned, the nerve is removed.
Metal crown: types
Typically, when a patient seeks help from a dentist to put a crown of metal, he is offered two options, depending on the method of production:
- One-piece product. It is produced by special casts by the method of burning in an oven. Such a crown differs thick walls, which favorably affects its service life. It is made of base metals( alloys of chromium, nickel, steel) and noble( platinum, palladium, gold, silver) metals. Because of the steel coloring, the products are prosthetically treated only by the lateral teeth hidden during the conversation. They are ideally suited for prosthetics of chewing teeth, because they withstand considerable loads.
- The stamped crown is a standard sleeve, which is ground with a special machine to give the product the desired shape.
Modeling of cast crown
Such a product is considered a reliable option for prosthetics and is installed from a cobalt-chrome alloy. The crown( metal) cast-in-one has undoubted superiority - it lacks solder joints, and this makes it particularly strong. It well covers the sharpened tooth, not allowing the cement mixture to resolve and reducing the likelihood of food penetration. The period of operation is 15-20 years. Modeling of a solid crown contains several items:
- casting of a prosthesis;
- tooth preparation( taken from 0.2 to 0.6 mm tissue);
- production of a wax cap by means of a tightening;
- finish, fit, polish, polish the metal surface;
- making casts, including opposite and adjacent teeth.
Samples of such products
To date, in the office of the dentist-orthopedist put solid-cast metal crowns( reviews on them from the majority of patients can only hear positive) of several types:
- Without sputtering - simple products of steel color.
- With sputtering. If the patient does not fit such a "beauty", if desired, the crown can be made with a spray that mimics gold.
- Coated. Even more aesthetic considered products, lined with ceramics. Their façade side is covered with a ceramic lining. However, you should be extremely careful at the time of eating, because the pottery can be cleaved.
- Combined. With this prosthetics, a part of the crowns is covered with ceramics, while others that are concealed with a smile are placed without facing.
Are prosthetics made from factory sleeves, which are given the necessary shape. Products are thin shells, so there is no need to grind a large number of tooth tissues. The crown( metal) is installed if there is no destruction of the roots, and 1/3 of the tooth is retained. For its production, gold or stainless steel is used.
The ease of creation has determined not only a low price, but also a short service life of the material. Gold stamped crowns are made from an alloy, which accounts for 90% of gold.
Steps for the manufacture of
There are certain stages in the creation of such a crown:
- , the patient makes casts of both jaws to model the product, which should be performed for 15 minutes, until compression of the raw material has occurred;
- on the gypsum, the lines of the prosthesis are marked so that it does not come out too wide or narrow;
- is then waxed, which is applied to the surface of the gypsum - thus, the crown( metallic) receives an anatomical shape;
- on the drawn model a steel die is created, which is driven into the sleeve;
- external stamping is performed with a screw press;
- stamp is removed, and the edges of the product are cut with special scissors.
During the manufacturing process, firing is repeatedly performed, so that the metal becomes more stubborn and sturdy. The prosthesis should not have irregularities and cracks.
Indications for the installation of the forged product
The installation of the metal crown is carried out:
- for the preliminary prosthetics of the milk tooth before changing it to a constant tooth;
- for saving a healthy tooth;
- as a fundamental component when installing a bridge;
- if the tooth is so injured or damaged by caries that it is impossible to renew it with a seal.
The process of installing the crowns
Such an event usually occurs in 2 stages:
- Initially, the product is placed temporarily so that the doctor can observe the tooth reaction.
- If the patient does not complain of pain, then at the next visit the crown is removed, cleaned from the pre-cement and reinstalled, but already with zinc-phosphate or glass ionomer cement.
If, as a result of the first installation, it is found that the metal crown( the photo is shown below) causes discomfort to the patient, then it will be removed and processed again.
What should be the properly installed product
A correctly manufactured and delivered crown:
- firmly abuts the shell of the tooth;
- has a smooth, polished form;
- sags into the dentogingival recess by 0.2 mm;
- reproduces the anatomical shape of the molar;
- is in contact with adjacent and opposite teeth.
Contraindications to the
installation In some cases it is not recommended to put a metal crown, if there is:
- the presence of an allergic reaction to steel;
- broken bite of dentition;
- appreciable damage to the living tooth;
- complex due to poor aesthetics when prosthetic anterior teeth.
What harm does the crown of the metal have?
In certain situations, such a product can cause damage:
- Due to its installation, galvanic syndrome may appear. This is due to the use of several alloys to create an orthopedic structure. Mixing of different materials leads to the formation of a galvanic current. There are headaches, swelling, some diseases, smack of metal, sleep disturbance, burning in the mouth.
- The crown( stamped) is not made on individual casts, in this connection it is not suitable for sufficient restoration of the functions of a living tooth.
- The product does not closely adhere to the tooth, creating a gap between the walls of the lumen, into which the remains of food penetrate. Therefore under it rotting of healthy tissues can come.
- One-piece crown has a good thermal conductivity. If it was placed on a non-punctured tooth, unpleasant sensations may appear during the reception of hot food.
Manufacturing of metal crowns is "eternally young" technology of the last century, which has not been modernized in recent times. Along with some modern and fashionable ways of permanent prosthetics, it remains all the same popular. And this is not surprising, since the main reason for this relevance is the small cost of the prosthesis with high strength.