The boundaries of the base of a laminar denture in the case of partial absence of teeth in the upper jaw and their rationale. Methods for fixing laminar dentures in the case of partial absence of teeth.

How a partial denture is attached to the jaw

There are 3 options for fastening removable structures: hooks (clasps), locks (attachments), telescopic crowns.
We propose to consider each of the options in more detail. Clasps. They are hooks made of metal or plastic that grip healthy teeth and fix the orthopedic structure in the mouth. The disadvantage of such fastening is poor fixation and unsatisfactory aesthetics. Despite the fact that the hooks are covered by the lip, they are visible to others when smiling and talking.

Attachments. More preferable from an aesthetic point of view. The special lock consists of 2 parts. One element is built into the base of the prosthesis, and the other is attached to the crown that covers your own tooth. This fastening option has a more reliable fixation and gives the product stability. In addition, the attachments distribute the chewing load more evenly, which slows down bone atrophy by almost 2 times.

Telescopic crowns. Presented by a system consisting of 2 crowns. The inner one follows the contours of the ground tooth. The outer one is connected to the base and restores the shape of the tooth. This allows the prosthesis to be securely fixed and prevents it from moving. The possibility of installing a telescopic structure in each specific case is determined by the doctor, since grinding of a large layer of hard tissue of the supporting tooth is required.

Boundaries of the denture base on the upper jaw

On the vestibular side, in the area of the edentulous alveolar process, the border of the prosthesis base runs along the transitional fold, departing from it 1.5 - 3.0 mm and bending around the frenulum of the upper lip and mucoalveolar cords. The distal border of the prosthesis base has a different location and depends on the location of the defect and its extent. Thus, in the absence of all lateral teeth and the presence of the anterior group of teeth, the distal border of the prosthesis should be located slightly in front of line “A” with the capture of the maxillary cusps. If there are included defects, the border in the distal region can be positioned slightly anteriorly, opening the posterior third of the palate.

With significant atrophy of the alveolar processes and maxillary tuberosities, as well as a flat palate, the base area of the prosthesis is increased to reduce the specific pressure per unit area of the prosthetic bed, as well as to maximize the use of adhesion forces to improve fixation of the prosthesis.

Natural teeth in the anterior section are covered with a base to the thickness of a wax base plate (1.8 mm). The lateral teeth are covered with the base of the prosthesis to 2/3 of the height of the tooth crown, which prevents the base from immersing in the underlying tissues and peeling of the gingival margin in the cervical area of natural teeth, helps stabilize the prosthesis and transfer pressure to the teeth.

Boundaries of the base of the prosthesis on the lower jaw

On the vestibular side, in the area of the edentulous alveolar process, the border of the base runs along the transitional fold, departing from it 1.5 - 3.0 mm and bending around the frenulum of the lower lip and mucoalveolar cords. For terminal defects of the dentition of large extent, it is recommended to place the distal border in the area of the mucoalveolar tubercles, covering them completely or partially depending on the degree of their mobility and the place of attachment of the pterygomaxillary fold. On the oral side, the border of the base runs along the transitional fold, bypassing the frenulum of the tongue. Natural teeth (front and side) are covered with a base at 2/3 of the height of the crowns. This increases the area of the base of the prosthesis, improves fixation due to the tight coverage of each tooth, and prevents its immersion in the underlying mucous membrane and injury to the interdental papillae.

The boundaries of the denture bases are drawn on the models with a chemical pencil. In addition to the boundaries, the center of the alveolar ridge is marked.

If there are sharp bony protrusions within the prosthetic bed, they are also outlined with a chemical pencil and subsequently isolated.

Topic 2.2 Fixation and stabilization of removable laminar dentures with partial absence of teeth

The oral cavity has mobile and immobile mucous membranes. Fixed – covers the hard palate, alveolar processes; such mucosa is connected to the periosteum. Movable mucous membrane covers the lips, cheeks, and floor of the mouth. Mobile mucosa is capable of shifting in different directions when facial muscles contract.

When the mucous membrane passes from the alveolar process to the lips and cheeks, a vault is formed, which is called a transitional fold.

The immobile mucosa has the ability to shift when pressed in the direction of the force. This property is called compliance. It is believed that the vertical compliance of the mucosa depends on the density of the vascular network of the submucosal layer. The vessels, with their ability to quickly empty and refill with blood, create the conditions for a decrease in tissue volume. Compliance matters in prosthetics. There are several zones of compliance, depending on its severity in a particular area.

Compliance zones

Area of the sagittal palatal suture (minimal).
Alveolar processes (minor).
The area of the transverse palatal folds (pronounced).
Posterior third of the palate (maximum).

Fixation is the retention of the prosthesis on the prosthetic bed without function.

Stabilization – holding the prosthesis on the prosthetic bed during function, i.e. during chewing, talking, any movements of the lower jaw. One of the main tasks in prosthetics is to achieve stabilization.

Indications and contraindications for use

Partial removable dentures are used in cases where the jaw is missing only a few teeth, but there are own healthy teeth that will be used as supporting teeth. Suitable for restoring both chewing and front teeth. The use of removable partial dentures is recommended in the following cases:

missing several teeth;
end defects of the jaw;
atrophied bone tissue;
the need for temporary prosthetics;
contraindications to the installation of implants.

There are practically no contraindications to this type of prosthetics, and they are all temporary. These include viral diseases, carious lesions of teeth and periodontal tissue diseases.

Physical basis of fixation of complete removable dentures on the lower jaw

In the practice of maxillofacial and complex prosthetics, one often has to deal with situations related to violations or absence of elementary anatomical conditions taken as the basis in the classical theory of fixation of complete removable dentures. For example, in the case of complete absence of teeth in the lower jaw, the best option for a prosthetic bed is considered to be a section of the jaw limited by clear transitional folds, with a fairly rounded and voluminous alveolar process, covered with a dense, moist, immobile mucous membrane, independent of the surrounding muscles.

This is an important condition, since the remaining areas of the oral mucosa interact with the muscles and have mobility. In this regard, the theory leads to the logical conclusion that it is impossible to use areas of the mobile mucous membrane as a prosthetic bed due to the fact that this will lead to loss of stability of the prosthesis and disruption of its fixation. Let's look at the possible options using the lower jaw as an example.

In severe clinical cases, a situation is often observed when atrophy of the alveolar process of the lower jaw reaches such a level that the prosthetic bed is presented in the form of a flat thin strip of immobile mucous membrane with a width of 5-8 mm, over which, on the one hand, a sharply mobile one seems to hang , a bulging floor of the oral cavity, and on the other hand, located at an angle of 90° to the plane of the prosthetic bed, the mobile mucous membrane of the cheeks and lower lip. There are practically no conditions for fixing the lower removable denture. We see three possible solutions.

The first is a surgical operation to deepen the transitional fold of the vestibule of the lower jaw and, thereby, expand the boundaries of the prosthetic bed, which will have a positive effect on the functionality and fixation of the prosthesis.

The second is the development of new prosthetic techniques taking into account existing specific features.

Third, the use of implants as the main means of fixing removable or fixed structures on the jaw.

In the first option we are faced with the following restrictions:

Presence of contraindications to the operation: concomitant diseases, age, patient’s disagreement with the operation.
Expected complications during the operation: first of all, these are expected and quite long-term, from several months to 1-2 years, paresthesia of the chin area and lower lip up to their complete numbness due to careless damage to the nerve branches during the operation.
The need for forced formation of the vestibule using special devices or prostheses.
There may be restrictions on the economic plan, as a consequence of a possible increase in the cost of work.

The first option, although complex, can be used if conditions that ensure safety and the expected effect are met.

In the third option, the question arises about the indications and contraindications for the use of implants: health status, concomitant diseases, anatomical features of the jaw structure, the need for additional osteoplastic operations, the presence and degree of development of osteoporosis and, of course, the cost of this treatment option. All of the above makes the third option quite limited for widespread use, but it may still be in demand.

Thus, from the above analysis it follows that the first and third treatment options, although they promise a positive effect, at the same time carry significant risks and a number of limitations, which cannot but be alarming.

The second option remains. It does not require any surgery, and therefore there are no risks in this case. Considering the above, we are more inclined to the second option, as it is safer, but requires a fundamentally new design solution.

The main idea in this case is that since for the normal functioning of a complete removable denture in the lower jaw there is not enough area for the prosthetic bed, it must be borrowed elsewhere. It is impossible to do this from the floor of the mouth, since the membrane of the floor of the mouth itself is so mobile and vulnerable that any attempt to rely on this tissue will be ineffective and traumatic.

It remains to try to obtain the required support area on the other side, where the movable mucous membrane of the cheeks and lower lip adjoins the prosthetic bed. When taking an impression, you can push the soft tissues in this direction, and the area of the base will expand, but then, due to the immediately arising reactive force, there is a prospect of the prosthesis being thrown off due to the elasticity of the tissues and with any contraction of the facial muscles.

The main idea is that since for the normal functioning of a complete removable denture in the lower jaw there is not enough area for the prosthetic bed, it must be borrowed elsewhere.

But what if, without creating additional pressure, without stretching the soft tissues, you can reach these surfaces by simply repeating their already formed shape, even if they are located vertically in relation to the existing prosthetic bed and have mobility due to the contraction of facial muscles? We have attempted to analyze the physical reasons for the fixation mechanism of a complete removable denture in order to develop a new technology to increase the level of fixation and stabilization of the prosthesis on the lower jaw in particularly difficult clinical conditions.

Let us imagine, using the example of an upper removable denture, that the force holding the denture is directed vertically in the direction opposite to the tearing force. While the prosthesis is in place, the holding force and the tearing force are in constant dynamic equilibrium, that is, they both constantly change in magnitude in a consistent manner, but at the same time, according to Newton’s 3rd law, they are equal to each other at any time. This can be easily understood by referring to the following example: when we apply a sufficiently large force to the prosthesis, which nevertheless cannot tear it off (let's say 5 kg), the force holding the prosthesis is also equal to this value.

If it were smaller, the prosthesis would come off. On the other hand, at rest the magnitude of the holding force is much less. Indeed, if it were still equal to 5 kg, then this would mean that even at rest the prosthesis presses on the patient’s jaw with a force of 5 kg! Obviously, this does not happen in reality. It follows that the force holding the prosthesis changes over time and depends on external and internal conditions.

It is known that between the prosthesis and the mucous membrane of the prosthetic bed there is a layer of oral fluid (ORF). Both at rest and when external force is applied up to a certain threshold value, the prosthesis does not put pressure on the patient’s jaw, but does not lag behind it. Because the denture is a rigid, virtually inextensible body, any force applied to the denture is transmitted to the layer of oral fluid underneath it. This means that between it and the jaw there is a closed area with liquid having a low relative to atmospheric pressure.

The fact that the opening of the chamber with reduced pressure leads to a complete loss of the ability of the prosthesis to be held on the jaw, well illustrates that it is the difference in pressure under the prosthesis and outside it that is the primary macroscopic reason for the occurrence of the holding force: the prosthesis seems to be drawn into the area with reduced pressure .

From the above, two questions arise: what causes the low pressure under the prosthesis and why does the chamber with low pressure under the prosthesis remain closed all the time? Let's answer them one by one.

The reason for the decrease in pressure when an external force is applied is an increase in the volume of the closed chamber under the prosthesis. Let's consider the case when a very large vertical external force of, for example, 16 kg is hypothetically applied to the prosthesis. If, with such a magnitude of external force, the prosthesis does not come off, then, as shown above, this means that the force holding the prosthesis is also equal to 16 kg. Where does this power come from? Let's assume that the atmospheric pressure is approximately 1 kg/cm². If the total surface area of the base of a complete upper removable denture is on average 50 cm², then it can be assumed that the surface area of the denture, which participates in the formation of a chamber with reduced pressure, is also approximately equal to 50 cm².

Let us assume that, due to the applied external force, the volume of the closed chamber under the prosthesis has increased by 1.5 times. Then, according to the Boyle-Mariotte law, the pressure under the prosthesis also decreased by 1.5 times and amounted to 0.67 atmospheres, or 0.67 kg/cm².

Then the difference between atmospheric pressure and the pressure under the prosthesis will be expressed as 0.33 kg/cm², which, acting on the surface of the prosthesis with an area of 50 cm², creates the holding force we are looking for: F = 0.33 kg/cm² × 50 cm² ≈ 16 kg.

Since at rest the external force does not act and the volume of the closed chamber under the prosthesis is constant, but at the same time the prosthesis is held on the jaw, this means that there is another reason for the reduced pressure under the prosthesis. This reason is the surface tension of the gastrointestinal tract under the prosthesis, which limits the area with reduced pressure along the contour of the prosthesis. This contour, in fact, is a thin flat capillary formed by the surfaces of the mucous membrane of the prosthetic bed and the prosthesis from the side of the subprosthetic area, ZRP, and externally bordering the air environment of the oral cavity.

We will assume that the phase interface between the air and the gastrointestinal tract is part of the surface of the cylinder, and the distance between the prosthesis and the mucous membrane of the prosthetic bed along the contour is approximately d = 1 mm. The surface tension coefficient of water is less than for saliva and is equal to α = 70 mN/m. There is no generally accepted experimentally established value for the contact angle of the prosthesis (or mucous membrane) with oral fluid, since the parameters of this fluid are very variable. To obtain a lower estimate of the possible surface tension force, we propose to take a deliberately very large value of the contact angle, equal to θ = 65º, corresponding to the case when saliva wets the prosthesis worse than in reality.

The radius of curvature of the cylinder with a gap size of 1 mm and a contact angle of 65º is R = d/cos θ = 2.4 mm. Surface tension leads to a decrease in pressure under the prosthesis. According to Laplace's formula for a cylinder, this reduction is equal to:

∆p = a : R = 0.07 : 0.0024 = 29.2 Pa

To obtain the net force, it is necessary to multiply this pressure difference by the area of the prosthesis equal to approximately

S = 50 cm² for the upper jaw.

F = ∆p x 0.005 = 0.146 H ≈15 g

This small force is involved in keeping the denture on the jaw at rest, since the average weight of a complete removable plate denture is also 15-20 g.

As shown above, there are two main reasons for the decrease in pressure under the prosthesis - an increase in the volume of the enclosed space under the prosthesis and the force of surface tension in a narrow space along the contour of the prosthesis. There are two important points to make here. Firstly, from the formula for surface tension it is clear that the narrower the space between the denture and the mucous membrane (capillary), the better the denture is held on the jaw at rest.

In other words, this means that the more accurately the contour of the prosthesis follows the shape of the prosthetic bed, the stronger it holds. Secondly, the holding force due to the application of an external force is much greater than the holding force due to surface tension. Even a small additional vertical force, such as the weight of the prosthesis, which is about 15-20 g, gives a more than twofold increase in the fixation force of the plate prosthesis on the upper jaw. This is one of two reasons why full dentures in the upper jaw are retained better than dentures in the lower jaw.

The second reason is that more liquid deposits accumulate in the area of the lower dentures and they often end up “sunk” in it. In addition, under the weight of the lower prosthesis, part of the urinary tract is squeezed out from under it. As a result, the phase interface between the gastrointestinal tract and the air environment may be displaced from a narrow area along the contour of the prosthesis higher into an area where the distance between the prosthesis and the mucous membrane is greater.

This reduces the holding force of the prosthesis created by surface tension. One way to avoid this effect is to try to make the contour limiting the chamber with reduced pressure as high as possible, for example by making the edge of a complete removable denture on the lower jaw more voluminous or by raising it above the level of oral fluid. Otherwise, the edges of the lower full denture may be completely immersed in the fluid of the oral cavity, and the denture will behave like a solid body immersed in liquid, losing all connection with the prosthetic bed (the patient feels that the denture seems to “float up”).

Based on the above, we have proposed a new system for fixing a complete removable denture on the lower jaw in difficult clinical conditions. We called it the “stabilizer belt.” Having analyzed both the clinical and physical principles of fixation of the lower complete removable denture, we came to the conclusion that there is a natural need to maximize the area of the prosthetic bed not only horizontally, but also on the vertically located surfaces of the cheeks and lower lip.

To do this, a vertical strip 5-6 mm wide is formed on the vestibular surface of the base, in close contact with the mucous membrane of the cheeks and lower lip throughout the vestibule, which ultimately gives at least 6.5-7 cm² of additional area of the prosthesis base. We get the opportunity to solve three problems at once that determine the fixation of the lower complete denture:

Increasing the base area of the lower complete removable denture improves its fixation and reduces the specific pressure per unit area.
Raising the base boundary above the average level of filling the oral cavity with oral fluid leaves a constant surface tension factor at the boundaries of the prosthesis, which largely determines the degree of its fixation.
The very ability to rest on the vertical surfaces of the mucous membrane of the cheeks and lower lip and, thereby, limit the horizontal displacement of the prosthesis base during function makes the prosthesis much more stable and stable, which also improves the fixation of the prosthesis (Fig. 1).

Rice. 1. An individual rigid tray for the lower jaw with an applied “stabilizing belt” border after appropriate trimming with a milling cutter and obtaining a vertical surface for contact with the mucous membrane of the cheeks and lower lip.

The technology for producing a “stabilizing belt” itself is quite simple. To do this, when making an individual rigid spoon for the lower jaw, from the side of the vestibule along the entire length of the spoon, using an additional portion of plastic, a roller is made of such a cross-section that when cutting it with a milling cutter, it is possible to obtain a vertical strip 5-6 mm wide and long along the entire front edge of the spoon. The surface of the strip should be parallel to the vertical surface of the mucous membrane of the cheeks and lower lip, but not touch it for the upcoming impression.

When making an impression, the silicone mass is applied both within the boundaries of the prosthetic bed and on the prepared strip of the “stabilizing belt”. The impression is made traditionally using functional tests. Particular attention is paid to ensuring that the silicone layer on the strip is thin enough and does not stretch soft tissues. The model is cast as usual, but at the front much higher, reaching the upper edge of the strip, i.e., to a height of at least 5-6 mm.

The boundaries of the model are determined in front along the upper edge of the strip, in other places along the boundaries of the functionally designed print. Modeling of the prosthesis base is carried out along the same boundaries. When a prosthesis made using new technology is delivered, its high stability and good fixation are noted. More than two years of observation have shown that the proposed technique works successfully, especially under difficult clinical conditions. Adaptation to the prosthesis usually occurs more calmly and in a shorter period of time.

Stages of manufacturing a removable partial denture

Depending on the type of prosthesis, the course of orthopedic treatment may differ slightly, but, in general, prosthetics can be divided into several main stages:

Preparation. After examination and diagnosis, the orthopedic doctor draws up a treatment plan and helps with choosing the optimal design option suitable for your particular case. At this stage, the oral cavity is sanitized. If necessary, teeth that cannot be saved are removed.

Taking impressions. Using impression material and a custom tray, the specialist takes impressions of the teeth on both jaws.

Manufacturing of the structure. In the dental laboratory, wax models are cast from the impressions, from which the technician makes the dentures.

Fitting and fixation. At the last visit, the doctor tries on the structure and fixes it in the oral cavity. If necessary, the prosthesis is adjusted and polished according to the bite.

Characteristics of removable dentures with cast metal bases. Indications for use

The metal base is used less frequently than the plastic one, although it has some advantages (it has greater strength and thermal conductivity, and does not cause allergic reactions). There are two methods for manufacturing a metal base: the stamping method (nowadays almost never used) and the casting method using fire-resistant models.

The metal base is used in both partial and complete removable dentures. To attach the plastic of the artificial alveolar process to the teeth on the base, special fastening points are created in the form of metal loops, etc.

Indications for the use of metal bases:

General medical indications include allergies to plastic prostheses, epilepsy, bruxism. features of the profession. The main indication is “repeated failures of plastic bases. It is advisable to use metal bases in people with multiple included but small defects in the dentition, when making prosthetics for patients with the loss of only central or lateral incisors. Dentures with a metal base are recommended in the treatment of patients with a deep bite, complicated by a decrease in interalveolar height, with narrowing of the jaws, when conventional dentures reduce the already small oral cavity, which makes speech, tongue movements and chewing difficult.

QUESTION 30

Small saddle (removable bridge) prostheses, methods of their fixation

Small saddle dentures can be used if no more than two teeth are missing in the upper jaw and three teeth in the lower jaw. Their functional value is lower than that of bridges. Small saddle dentures should be used if the clasps of the removable denture can be installed on the abutment teeth without preparing them for a crown and if the abutment teeth have a low clinical crown.

They should be fixed using support-retaining clasps with mandatory marking of the model in a parallelometer. For large defects, such dentures should be avoided due to difficulties in fixation, especially in the upper jaw. In the case of a well-defined equator, bent wire clasps with sufficient elasticity can be used. If the crown part of the supporting teeth is low, telescopic crowns can be used to attach dentures. The fixing elements should also include dentoalveolar clasps according to Kemeny and various locking fastenings.

QUESTION 31

Sequence of clinical and laboratory techniques for partial removable plate prosthetics

Lifespan of removable partial dentures

Practice shows that the service life of removable plate structures is on average 3-5 years, after which the structure has to be changed. Bugel products have a longer lifespan - up to 5-7 years.

In general, the duration of wearing depends on several factors:

— the quality of the design and the professionalism of the specialist who carried out the installation;

— characteristics of the body and the condition of the oral cavity, the presence of gum diseases and deformation of the dentition;

— accuracy of compliance with doctor’s recommendations and proper home care.

Device structure

In order to evenly distribute chewing loads on the tissues of the oral cavity, the base of a removable orthopedic structure must be sufficiently strong, elastic and moderately plastic.

Regarding the hygiene factor, the base of the prosthesis is made of materials that minimally adsorb the components of saliva and food particles and are easy to clean with classic oral care products.

Today, bases made from special plastic compositions are most in demand. They are based on acrylic polymers, which are distinguished by the presence of copolymers and fillers in their composition.

In our country, the following basic plastics are widely used in dentistry:

acronyl;
fluorax;
fluorax in tandem with a cross-linking agent;
colorless plastic;
ethacryl;
buckrel;
acrel.

Despite such a wide range of base plastics, making durable removable dentures can sometimes be difficult. This is especially problematic in severe clinical situations.

Then doctors resort to making structures from metal alloys:

stainless steel (the prosthesis is made by stamping);
cobalt-chrome alloy (cast base).

Remarkable! Alloys of noble metals are not used for the manufacture of bases, because are high cost and have reduced strength characteristics. And their main drawback is their heavy weight, which is not suitable for treating patients with problems of the upper dentition.

Why gum inflammation occurs under a denture and how to get rid of the problem.

Come here to review the properties of fast-curing plastics used in dentistry.

At this address https://zubovv.ru/protezirovanie/semnyie-p/nuzhno-znat-na-verhnyuyu-chelyust.html we will talk about the stages of manufacturing a complete removable denture for the upper jaw.

Rules for wearing and caring for prostheses

The first time after installation, removable dentures can cause discomfort. As a rule, it goes away by the end of the first week. In some cases, especially when using plate structures, addiction can last up to 3 weeks.

To speed up adaptation, there are general rules and recommendations: rinse your mouth with warm water more often, do not overload the denture with solid food for the first 3-4 days.

Carefully monitor hygiene, rinse your mouth after every meal, and beware of excessive chewing loads. For cleaning, you should not use abrasive cleaners; give preference to special solutions and pastes.

Are partial dentures repairable?

During use, individual parts of the prosthesis may break off. Under no circumstances should you attempt to repair it yourself; it is better to contact a specialist. If the situation can be corrected, it will only take a couple of days to fix it.

Every six months to a year, during a scheduled visit to the dentist, it is necessary to reline the plate and clasp structures, since the contour of the gums and the level of bone tissue change over time. The adjustment improves fit and load distribution, resulting in the product not chafing or breaking.

The most frequently asked questions about partial dentures

Is an allergy possible? How long does it take to get used to? Do you need fixing gels when wearing? You can find out the answers to these and other most popular questions in this section of the article.

— Is it possible to have an allergic reaction?

Is it possible. As a rule, an allergy can occur to acrylic when wearing plate dentures. Or on metal if wearing a clasp design. Before installing a prosthesis, a doctor may recommend that particularly sensitive people undergo a special test for sensitivity to materials.

— How long does it take to get used to it?

Sometimes it can take up to 3-4 weeks to get used to it. This usually applies to plate dentures, since they are more noticeable in the oral cavity. Clasp designs do not require so much time.

— Do I need to use fixing gels when wearing partial structures?

Partial structures do not require additional fixation, since they already have fastenings (hooks or clasps).

— Do I need to take off my dentures at night?

It is not at all necessary to remove the structure at night. It is not even recommended to remove the prosthesis for the first 3-4 weeks after installation, since there is an adaptation period. Further, at the discretion of the patient.

— Are there any restrictions when wearing?

Avoid eating excessively hard foods such as nuts or ice. It is also not recommended to eat foods that are too viscous and stick to artificial teeth.

Partial dentures - reviews from specialists and patient opinions

In general, reviews of removable dentures from patients and doctors are positive. If there are contraindications to the installation of fixed structures, removable prosthetics are the only treatment option.

However, experts are confident that if there are no restrictions on implantation, the choice should be opted for prosthetics on implants. This option is the most preferable in terms of longevity, aesthetics, safety and prevention of bone atrophy.

What is the cost of a partial denture?

First of all, the price varies depending on the type of prosthesis and the number of lost teeth. Many are sure that a high-quality prosthesis cannot be very cheap. So what does its cost consist of?

The material of construction plays a big role in pricing. Modern dental clinics work with proven compounds for the manufacture of structures. This guarantees the quality, aesthetics and durability of the product.

All designs are made individually, based on the characteristics of the jaw structure, patient preferences and doctor’s recommendations.

Professionalism of staff and technical equipment. The experience of an orthopedist and dental technician, as well as high-tech equipment, is very important, so the price tag also adds up in terms of costs.

Where in Voronezh can a partial removable denture be installed?

For a quality result, it is important to choose a dental clinic and attending physician wisely. Making the wrong choice can create a lot of problems and cost you a lot of time and money to fix the mistake. Be sure to pay attention to the specialist’s experience, the availability of modern equipment and reviews of other patients.

You can install partial removable dentures in Voronezh at. We offer production using modern equipment, high-quality materials and competitive prices. Our consummate specialists are always ready to help. We are waiting for you for your first free consultation!

Borders of the product on the lower jaw

The base plate, made for a movable jaw, has individual characteristics, namely:

The edge lines of the product in the area of edentulous areas go higher in the area of the deepest part of the arch by a maximum of 1 mm. The base is equipped with special recesses in the area of the lateral bands and bridle.
With correct occlusion, the degree of overlap of the frontal and lateral healthy teeth is equal to 2/3 of the height of their crowns in the places of their contact with the base.
This makes it possible to increase the area of the plate, improve its stabilization by firmly enveloping each unit and prevent settling into the underlying structures.
The lower edge lines of the plate are located just above the transitional fold, while the area of the hyoid frenulum does not overlap.
If a patient is diagnosed with long terminal defects of the dentofacial arches, then the location of the distal border will be in the area of mucous protrusions with their partial overlap. Complete overlap is also possible in case of pronounced mobility in certain areas.
The width of the plate must be sufficient, because
in the process of chewing food and when talking, the entire structure begins to move upon contact with moving tissues. Fixation of the prosthesis is carried out in the spaces between the buccal, pterygoid and muscles of the same name to areas immobile for jaw movement. This placement technique increases the fixation of the entire structure, especially if the lower jaw is completely edentulous.

There are cases when it is quite difficult to install a prosthesis: osteochondral growths in the area of small molars.

After explaining the features of the clinical picture to the patient and obtaining his consent, benign neoplasms are removed and only after that a dental product that replaces teeth is fixed.

The main symptoms of prosthetic stomatitis and treatment offered by specialists.

In this publication we will discuss the types of prosthetics in the absence of a large number of teeth.

Here https://zubovv.ru/protezirovanie/semnyie-p/konteyneryi-dlya-hraneniya.html let's talk about prices for containers for dentures.