Lack of teeth is a serious problem that leads to various disorders in the human body. Dentists advise to solve it as soon as possible. The number of people suffering from full or partial adhesion increases every year, which makes the issue of prosthetics particularly relevant. One of the most common treatment methods is fixing a removable denture. Making dentures is not an easy task, which only qualified specialists can handle. This design is especially popular because it is characterized by high aesthetic properties, allows you to quickly restore chewing functions.
Clinical manufacturing steps
Removable structures are difficult to manufacture, in many respects the procedure depends on the experience and professional skills of the doctors, as well as on the condition of the patient’s oral cavity.
Important! The specifics of the manufacture of prostheses includes a set of clinical and laboratory activities. The intimate work of the dentist and dental technician during the manufacture of such products is a guarantee of successful prosthetics.
The following are the clinical steps for the manufacture of full dentures:
- Examination of the patient and collection of anamnesis. At this stage, the dentist carefully examines the history of diseases (causes and nature of tooth loss), listens to patients’ complaints. If necessary, instrumental diagnostic examination is prescribed to determine the characteristics of the masticatory muscles, the state of the mucous membrane and the bone base. In most cases, resort to radiography and tomography. Based on the diagnostic results obtained, a diagnosis is established and the most suitable design is selected.
- Removing the impression from the jaw with a standard spoon. The impression is the inverse mapping of the surface of the tissues that form the prosthetic bed. Used dental impression mass directly depends on the choice of design.
- Getting a functional impression. The taking of prints is carried out by means of individually selected spoons.
- Determination of the relative position of the jaws. At this stage, the dentist by means of wax bases with rollers establishes the position of the lower jaw relative to the top in 3 mutually perpendicular planes.
- Wax construction test. The specialist evaluates aesthetics and occlusion. This is one of the most crucial stages.
- The imposition of finished dentures on the jaw. Before imposing prostheses are subject to mandatory antiseptic treatment. At this stage, check the reliability of fixation and aesthetic properties.
- Correction design. If necessary, the finished prosthesis can be sent to the laboratory for correction.
How to make dentures?
The current production of removable dentures is the use of advanced technologies and materials. This allows you to get designs that are characterized by reliability and durability, as well as high aesthetic properties. Along with the clinical stages, the specialist conducts and laboratory. The laboratory stages of manufacturing a complete denture are as follows:
- Making an individual spoon. This is a necessary tool used to obtain a functional impression. It is developed in the laboratory in one of the following ways: from a quick-hardening plastic, from a plate of a photopolymer composite or thermoplastic plastic. The most commonly resorted to cold polymerization method (made of plastic).
- Making a wax base with occlusal rollers on working models. They are necessary to determine the location of the jaws.
- Setting artificial teeth. At this stage, the dental technician selects the desired color and size of the teeth.
- Strengthening products in the articulator. After their installation into the articulator, the rollers are removed, and acrylic teeth are installed in their place by means of wax.
- Making the final denture. At this stage, the wax is replaced with acrylic plastic, the wax product is simulated, its gypsum is placed in a cuvette and the subsequent change of wax to the base material. Next, carry out the polymerization of plastics, finishing and polishing the resulting prosthesis.
The surface of the fabricated structure must exactly repeat the relief of the nearby tissues. In this case, it will be securely fixed in the oral cavity, and perform its functions. At the end of the work, the result of the prosthesis is assessed according to the dynamic tests and the sensations of the patient himself (several weeks after installation).
Different materials can be used to develop removable designs. The main requirement for them is the absence of toxicity. Such materials include: nylon, acrylic, cermet, silicone, plastic.
The term of manufacture of these structures directly depends not only on the technology used and the material used, but also on the patient’s jaw condition (duration of tooth extraction, the presence and condition of the teeth on the opposite jaw). On average, we can designate the following production dates:
- 7-10 days (for plastic and nylon products);
- 10-14 days (for lamellar and byugelny products with hooks);
- 14-20 days (for products from metal-ceramic and byugelny products on telescopic crowns).
Advantages and disadvantages
Removable dentures are in great demand due to their undeniable merits. But along with them, such structures have disadvantages. Below is a table with a detailed description.