MRI with dental implants: permitted metals, contraindications. How to know if an MRI can be done with your dental implants Can an MRI be done with dental implants

If a patient has had dental implants installed at some time, throughout his life he will have to follow certain recommendations for their operation and for the care of the structure. There are certain medical measures in which the presence of implants is necessarily taken into account. One of the most common questions is whether it is possible to do an MRI with dental implants. It should be noted right away that before the MRI procedure, the doctor must be warned about the presence of prostheses in the oral cavity.

Main limitations for MRI

So, is it possible to do an MRI with titanium implants? This is a common rather important question that has become relevant with the development of modern medicine. MRI is a completely new innovative method of examination, during the use of which any pathological process can be detected, and at the very early stage of its development. With the help of this form of examination, it is possible to conduct an examination of any part of the body, bone tissue and cartilage of the teeth, including. If there are any problems with this part of the body, an MRI may be done. With its help, you can determine the condition of the implants, whether or not there is an inflammatory process next to them.

MRI with a variety of dental structures may be ordered by the dentist to detect the following diseases and signs of discomfort. To make a magnetic study, a decision is made with such unpleasant sensations as:

Thanks to a well-performed MRI procedure, it is possible to understand whether there is a need for a patient to undergo surgical treatment, and whether or not a simple drug therapy can be dispensed with.

Varieties of material for dental structures and MRI

The answer to the question whether or not it is possible to perform resonance imaging with dental implants directly depends on which of the materials was used in the process of prosthetics. Some time ago, structures of this kind were made of metal, as a rule, an alloy of gold, copper and steel was used. This composition of tangible effect on MRI may not have a significant effect, but the picture that is obtained during the study is not very clear. At the moment, implants made of metal-ceramic are used in dentistry. With them, you can undergo an MRI without any problems, the quality of the picture will not be completely spoiled.

In the presence of pain, the procedure is still necessary to do.

It is not only the material of the crown that matters, but also the bases from which all the details are made, that is, the pins and screws. Each such element is made of paramagnetic, ferromagnetic and diamagnetic. Such bases are able to influence the magnetic field that is created by MRI machines. These are special materials that, under the influence of the magnetic field present in the tomography equipment, can heat up and move. For this reason, before the examination, it is worth checking the shape of the dental structures that are standing, their strength and the reliability of their fastening.

Insufficient MRI result - causes

Implants in the process of MRI do not cause any danger. The only unpleasant moment is a slight distortion of the results. For this reason, each of the patients who plans to have an MRI should warn the doctor. The procedure can be carried out without any problems, but in order to obtain the most accurate settings, the specialist will pre-configure the equipment. It is strictly forbidden to conduct an examination in the following cases:

Another important rule that applies to people with dental implants is a preliminary X-ray examination. On them, the specialist will clearly see the clear location of the dental structures.

MRI and metal crowns

MRI of the jaw and teeth is prescribed in the rarest cases. The main reason is the fact that these parts of the body are quite difficult to access for research. The procedure is indispensable for various uncomfortable sensations during chewing, with spasms in the jaw area, as well as with some restrictions on jaw mobility.

If you are interested in the question, what to do if a crown or pin made of ferromagnetic alloys is installed. If such materials are present in the oral cavity, MRI is performed only with the permission of the attending physician. The specialist already decides what to do, whether or not to conduct an examination. It should be noted that in some modern clinics in large metropolitan areas, equipment is installed in MRI rooms that does not displace implants or heat them.

Metal crowns cause a fuzzy image.

In a situation where the clinic does not have the appropriate equipment at its disposal, the procedure may be refused. There are fewer and fewer such medical centers, the majority of polyclinics are equipped with the most modern equipment. Professionals can set the settings in a special way and get a clear picture of information equipment. In some particularly critical situations, when a person's life is at stake, the patient will be advised to remove all dental crowns.

Summing up

Modern magnetic resonance imaging is a special innovative method for diagnosing the human body. Despite the presence of a large number of positive factors and indications for the use of this examination, there are some contraindications. Among them, it is possible to single out the presence of implants. In such a situation, you don’t have to worry about the structure, since it is not damaged under the influence of a magnetic field.

To avoid such a negative impact, it is worth notifying the doctor about this factor in advance. Having received such information, the professional will decide how to proceed further, how best to diagnose in order to prescribe a high-quality effective treatment.

If all the rules are followed, if the doctor's recommendations are followed, an MRI will be performed without any consequences for the teeth and the body as a whole. Based on the data received, the doctor develops a follow-up plan.

Modern medicine offers a variety of methods for diagnosing the human body. One of the safest is magnetic resonance imaging (MRI).

MRI is a method that allows you to visualize the internal organs of a person by placing him in a constant magnetic field. The procedure allows you to diagnose soft tissues well, shows metabolic and physiological processes in organs, tissues, joints and bones.

Indications for the use of MRI

Can't do without her when diagnosing the following conditions.

1. Pathologies of the spinal cord, pituitary gland and nervous system.
2. Injuries of soft tissues of internal organs.
3. Tumor processes: both malignant and benign.
4. Inflammatory and infectious processes in the joints and bones.
5. Surgical control with radiation and chemotherapy.

Obviously, the range of diagnostics is quite wide, almost everyone, even pregnant women, can be examined by MRI. There is only one contraindication for this diagnostic method - the presence of magnetic metal structures in the human body, which include not only metal parts of structures, but also various defibrillators, pacemakers. Often, patients have a question: should dental prosthetic structures in the oral cavity, including dental implants, be considered an obstacle to such an examination?

MRI and the presence of dental implants

Doctors declare with all responsibility: the presence of implants and bracket systems in the patient's oral cavity is not a contraindication for MRI.

Let's see why.

Modern dentistry uses different techniques and materials to install dentures. But today, as a rule, these are structures made of non-magnetic alloys, such as titanium, gold. According to the degree of magnetization, three types of metals are distinguished:

1. paramagnets - substances that are weakly attracted to a magnet;
2. diamagnets - materials that are weakly repelled by a magnet;
3. ferromagnets are materials that actively interact with a magnet.

Today, mouth structures are made mainly of paramagnetic materials, while ferromagnetic materials were widely used earlier. alloys of nickel, steel, iron.

Therefore, the materials from which dental crowns are made will behave differently in the magnetic field of the tomograph. Since the crowns and pins are rigidly fixed, there will be no displacement under the influence of a magnetic field, ferromagnetic inserts in the teeth may heat up a little, but this does not happen in MRI machines. But the presence of dental implants, braces, metal fixed prostheses may interfere, which will certainly affect the quality of the picture. Moreover, the farther the part of the body being studied is from the oral cavity, the less likely it is to distort the images.

Possible influence of implants on the study area

1. When examining an MRI of the neck and head, the influence of dental prostheses can give serious distortions and greatly affect the image quality.
2. When examining the chest, the result will depend on the characteristics of the MRI machine itself and on the material on the dental crowns. The appropriateness of such a procedure should be decided with the doctor conducting the diagnostic procedure.
3. When examining the lower spine and legs, metal inserts in the mouth, whatever they may be, will not cause any damage to the quality of the images.

In any case, in preparation for the procedure should tell the doctor who conducts diagnostics with an MRI machine, about the presence of metal prostheses and dental implants. The MRI machine allows you to adjust the recording parameters in such a way as to compensate for possible distortions. It is recommended to bring an x-ray of the jaw with you so that the doctor can correctly determine the location of the prosthetic teeth. Then the quality of the survey can be considered effective.

Detailed analysis of the oral cavity

As for the study of the oral cavity using MRI, this is a very rare appointment, not only because the procedure will be difficult due to the distortions created by dental implants and other metal inserts in the oral cavity. Also because there is a simpler and more affordable way to examine teeth - computed tomography and conventional x-rays.

To examine the mouth, you can use special CT scanner(CT). The method of computed tomography is based on X-rays and with its help dense media look good: bones, joints, teeth. The procedure is carried out while sitting, takes a minimum of time and is quite informative. To get such a result as on a CT, you would have to do a lot of conventional x-rays of the tooth.

This leads to the conclusion: it is not advisable to do an MRI of those parts of the body where there are metal structures due to the lack of information content of the data obtained. Therefore, before examining the head, if there are metal prostheses in the mouth, you should consult a doctor. Otherwise, the presence of dental implants cannot interfere with a detailed diagnosis of the body by an MRI machine.

In a modern clinic, you can get a wide variety of services on methods for diagnosing the state of the human body. The least dangerous for the body, is now considered a method called MRI or magnetic resonance imaging. This diagnostic method is considered one of the most harmless, even women in position can do it. There is only one serious contraindication for this method: you cannot do an MRI with implants in the body.

In some cases, it is necessary to conduct an MRI for people with implants in the body

In this article you will learn:

Why an implant may be a contraindication for MRI

If the attending physician prescribes an MRI, and the patient has implants, fixed dentures or conventional crowns on the teeth, the patient is obliged to inform his attending physician of the name of the materials from which the foreign objects are made. It is believed that the presence of foreign objects in the patient's body can distort the data obtained as a result of the examination. For example, if the dental crowns contain a material such as titanium, then an MRI is quite possible, but the procedure should not become permanent.

Which implants do not require MRI?

There is a certain list of implants, in the presence of which MRI is generally contraindicated in the human body. Even if the material from which they are made allows it.

• The presence in the patient's body of metal implants of especially large sizes.
• The presence in the body of hemostatic clips in the vessels.
• Maintaining the activity of the patient's heart with a pacemaker.
• Fragments of bone tissue are fastened with the Elizarov apparatus.
• The patient has an implant in the middle ear.
• There are ferromagnetic fragments in the patient's body.

The study is not performed in the presence of metal implants in the bones

It is worth considering the case when the patient has a pin in the tooth, and he needs to do an MRI of the brain. This question is quite popular, since the vast majority of patients may have pins in their teeth or just crowns. MRI in the presence of fiberglass or ceramic pins can be done quite calmly. But if the pin is made of titanium, gold or platinum alloys, you must inform your doctor about this. The doctor will adjust the sensitivity of the device accordingly, this will avoid possible interference in the received images. The result will be accurate, without possible distortion. If this is not done, then the pictures, in places where foreign metal elements are present, may be blurry.

When performing an MRI of the brain, there are also a number of contraindications:

• First of all, it is the fear of closed space. In the case of the presence of metal parts in the body, it may be strengthened due to the appearance of magnetic waves.
• Serious heart disease, use of pacemakers. During the procedure, the patient's heart may not withstand the overload and stop.
• MRI is absolutely not allowed in patients with multiple sclerosis.
• The doctor may not allow a patient with tattoos to be scanned. When drawing a picture, dyes containing metal could be used.

From this video you will learn whether it is possible to do an MRI with dental implants:

What changes may occur

When performing an MRI of the brain with a dental implant made of metal, a sufficiently strong magnetic attraction can occur, as well as the appearance of a magnetic field. This phenomenon can have a detrimental effect on the state of a person as a whole, in particular, under its influence, it is possible to change the position of the implant in the body. Doctors cannot guarantee an accurate diagnosis, and the resulting fields can cause injury to living tissues of the body. In the presence of a pacemaker, an artificial heart valve, a hearing aid in the ear, the magnetic field can interfere with their work. Such a disorder in work can pose a direct threat to human health and life.

When MRI is allowed with implants

There are a number of cases when MRI is allowed in the presence of implants.

• The presence of implants, for example, in the oral cavity, does not affect the results of MRI of the extremities or abdomen.
• Implants made from materials with a low metal content (ceramics, fiberglass) do not affect MRI results.
• If it is possible to remove or temporarily remove a foreign element, an MRI is possible.

The installation of ceramic implants does not affect the course of the MRI in any way

In any case, with the possibilities of modern medicine, the presence of implants has ceased to be a serious problem when prescribing magnetic resonance imaging. Basically, the metal in the implants affects the quality of the results, and not the state of the organism. Modern equipment can significantly reduce the risk of harm to life and health.

Every woman should take care of her health and know that after 35 years it is necessary to undergo breast ultrasound and fluorography once a year. And after breast augmentation it is extremely necessary. But most girls after plastic surgery are wondering whether the examination after the operation will be reliable, and whether all breast zones will be visible on the devices.

It is very important to take care of yourself and think about the future, so it is necessary to pass all examinations on time. Will implants interfere with ultrasound, mammography, CT, MRI? This is the most popular question among women who have breast augmentation. The answer is no! The presence of breast implants will not affect the examination in any way, and will not interfere with the final diagnosis, provided that the examination is carried out using modern technology.

Before the examination, it is recommended to carefully select a clinic. As a rule, all modern clinics are equipped with the latest models of technology. Beforehand, it is recommended to clarify whether a breast examination with implants is possible, as well as to consult with a specialist who will select the most appropriate examination method.

Types of examinations:

1. Ultrasound - ultrasonography. Ultrasound must be done before plastic surgery, and then repeated annually after it. Today it is the most common method of examination. Ultrasound allows you to study the mammary glands before surgery, as well as to exclude various complications, inflammation and adverse changes already during the rehabilitation period.

2. Mammography. Despite the fact that mammography is the most accurate method of examining the breast, it still has some difficulties. In cases where the implant was placed over the pectoral muscle, during the examination, it may block some areas of the breast. If the implant is placed under the muscle, the blocked area is insignificant. The disadvantage of this method is that it will not help to determine the rupture or leakage of the breast implant. When performing mammography, each gland is compressed first horizontally, then vertically, so the patient should warn the doctor in advance about the presence of a breast implant in the mammary glands.

3. MRI - magnetic resonance imaging. A feature of the method is the use of a powerful magnetic field. MRI allows you to determine the rupture or leakage of the implant, to identify foci of tumors and metastases.

4. CT - computed tomography. This type of examination is considered the most accurate for the diagnosis of breast cancer. Computed tomography is referred to as an X-ray method for examining the breast.

5. Fluorography. Breast implants can be seen on the x-ray. The patient should warn the doctor in advance about their presence, but they will not interfere with the examination of the lungs in any way, because. implants easily transmit x-rays.

Thus, the presence of breast implants will not interfere with any of the listed types of examinations and obtaining accurate data on the condition of the patient's mammary glands and lungs.

To date, one of the mandatory studies when applying for a job is a fluorogram. If you seek help from a state clinic, the doctor will definitely require a stamp on the passage of fluorography. What does this study show and why are its results so important?

Fluorography is a type of x-ray examination, during which the “scanning” of organs located in the human chest takes place. In general, a fluorogram held once a year after 15 years to study the condition of the human lungs. The honor of opening fluorography belongs to the American scientist J. M. Blair and the Italian scientists A. Battelli and A. Carbasso.

Depending on the size of the image, fluorography is divided into:

• small frame (24*24 mm or 35*35 mm);
• large frame (70*70 mm or 100*100 mm).

As a rule, a fluorographic image is much smaller than a conventional x-ray. That is why the harm to health from fluorography is considered much less than from x-rays, since the body receives much less radiation.

Nevertheless, it is often not recommended to do fluorography. The exception is workers in a hazardous to health industrial sector (blacksmiths; people working with asbestos, rubber) and heavy smokers: sometimes they are assigned to undergo a lung examination up to 2 times a year.

Fluorography is divided into types depending on what technique is used to obtain a picture of the lungs. There are three main types:

1. film.
2. digital (computer fluorography).
3. digital fluorographic scanning.

The principle of operation of film fluorography is that behind the screen of the apparatus with which the study is done, there is a special film. When X-rays pass through the human body, they subsequently fall on this film. Thus, an image of the chest organs appears on it. A significant disadvantage of this technology is that it is rather outdated: the image of the lungs is very blurry, and the results of the study will have to wait a long time.

It is not difficult to guess that a digital fluorogram image is processed using a computer. Hence the second name of this method - computer fluorography. The rays, passing through the human body, do not fall on the film, but on a special matrix (just like in a digital camera). Thus, as well as pictures taken with a digital camera, a digital fluorogram can be saved and processed using a computer.

Digital fluorographic scanning is aimed at causing less harm to human health than conventional digital fluorography, which is dangerous due to exposure. The principle of operation here is as follows: fan-shaped X-rays pass through the human chest, subsequently reflecting on a special matrix. Then, with the help of a matrix, the image enters the computer, where it is processed.

Where and how is the research done?

It is necessary to do fluorography at least once a year, but not more often, since the harm of fluorography is to irradiate the body with x-rays. More than once a year may insist on doing FLG:

• medical staff of maternity hospitals;
• employees of tuberculosis dispensaries;
• relatives of a patient with tuberculosis;
• workers in industries that are harmful to the respiratory tract (with asbestos, rubber);
• mining industry workers;
• metallurgists.

They make a fluorogram in specially equipped rooms with a special apparatus for conducting research. Such offices can be located in both private and public clinics. But in private, as a rule, you will have to wait much less time for the result. Usually a fluorogram is ready in 2-3 days after completing the study. It is not necessary to do a fluorogram on an empty stomach.

The research procedure itself is as follows: the patient comes to the fluorography room, the laboratory assistant asks him to undress to the waist. Men are sometimes allowed to stay in clothes: leave a T-shirt made of thin fabric or a T-shirt on the body. Women can wear a bra only if there are no metal bones in it. Any metal jewelry from the neck must be removed. Then the patient stands in front of a special screen, presses his chest against it closely.

To properly perform fluorography, you need to put your chin in a special recess above the screen, and rest your hands on your sides, while spreading your shoulders wide. The laboratory assistant asks to hold your breath for a couple of seconds. At this time, the patient's chest is scanned. Repeated fluorography is done in a year.

There are also mobile fluorography rooms. They can stop at the territory of large enterprises, in rural areas. The purpose of such offices is to carry out mass fluorographic scanning in order to prevent tuberculosis and other dangerous lung diseases in settlements where residents do not have the opportunity to get to the city. The heads of large enterprises invite mobile offices in order to massively carry out fluorography among all employees, without taking them away from work for a long time.

Diagnosable diseases

With the help of fluorography, life-threatening diseases can be diagnosed, such as:

1. bronchitis.
2. lungs' cancer.
3. consequences of injuries of the ribs, spine.
4. various cardiac pathologies.

As a rule, any pathology is manifested by dark spots in the picture. When the fluorogram is normal, the pattern of the lungs will completely clean. The picture may also be accompanied by a description of the overall picture, which may mean the following:

• the roots are expanded - compaction of the roots of the lungs indicates bronchitis, the beginning of the inflammatory process in the lungs;
• the roots are heavy - this may indicate bronchitis, as well as the patient's abuse of cigarettes (more than one pack per day);
• increased lung pattern - bronchitis or lung cancer (initial stage), pathology of the cardiovascular system;
• fibrous tissue - this means that the patient has already had a lung disease (surgery, infection);
• focal shadows -, the initial stage of tuberculosis;
• calcifications indicate the reaction of the patient's body to contact with the causative agent of lung diseases (pneumonia, tuberculosis). However, the immune system fought back the "invaders";
• pleuroapical layers indicate past lung diseases (pneumonia);
• the sinus is sealed or free. If the sinus is free, then the patient's lungs are healthy. If soldered - a doctor's consultation is required;
• changes in the diaphragm indicate the pathological development of the diaphragm, which can be caused by poor heredity, obesity, pleurisy, diseases of the liver, esophagus, intestines, stomach;
• the shadow of the mediastinum is displaced or expanded - this description may be evidence of hypertension, heart failure, myocarditis.

Contraindications

When a person undergoes a fluorographic examination, he somehow receives a certain dose of X-ray exposure. This dose does not pose a serious health hazard, but there are still certain contraindications for this study.

So, it is impossible to do a chest x-ray for pregnant, lactating women, since the radiation dose can be dangerous for a child. In this case, an alternative to fluorography can be a regular x-ray of the lungs, but only in an extreme situation.

For children, fluorography is contraindicated until they reach at least 15 years of age. Before that, the Mantoux reaction will help diagnose tuberculosis in a child.

Some women are wondering: is it possible to do fluorography with implants? The answer is yes: you can. Implants do not interfere with the passage of x-rays through the chest of a person, however, they will be visible in the picture.

Effects

After fluorography, a person receives a certain dose of radiation, which, nevertheless, does not pose a particular threat to health. During the fluorography procedure, we can receive a maximum radiation dose of 0.3 mSv. For example, we get the same amount for a month of living in a large metropolis. But if you do not agree to put up with such consequences, in order to remove radiation from the body, you can simply drink milk after fluorography for several days.