Restoration of chewing function aims not only to replace the teeth that have collapsed, but also to recreate the correct trajectory of the movement of the lower jaw.
The direction of movement of the jaw is individual and is directly dependent on the anatomy of the crowns, as well as the structure of the temporomandibular joints. The installation of a facial arc can ensure the correctness of the indicator. It is hard to imagine modern dentistry without this device.
What is this?
The facial arch is a device that is used to transfer the jaw model from plaster into the interframe space relative to the axis of its opening, taking into account the orientation of the dentition in relation to the skull and mandibular condyles. An articulator is a device that reproduces the movement of the lower jaw.
The facial arch is a U-shaped metal plate, which is fixed in the area of the ears or temporomandibular joints with the help of special stops. Also, the device is attached to the bridge of the nose with a nose pad.
The part attached to the teeth is called the "bite fork". She is attached tofront arch using a three-dimensional retainer.
The principle of operation of devices has much in common with the function of braces. The facebow provides a certain pressure on the teeth, so that they take a natural position.
Varieties of designs
A device such as a face bow, the price of which depends on the type of construction and the manufacturer, is of three types:
- with fixing device in the neck area;
- with fixing device in the head area;
- with a fixation device in the neck and head.
Installing fixture
Installation of the front arc is possible in a single position. Through this property, a unified application of the apparatus and the stability of the final result are achieved.
The bite fork, together with the impression mass-registrar, is located in the oral cavity and is pressed against the dentition of the upper jaw or simply against the gums if there are no teeth.
After this manipulation, the bite fork and the facial arch tightly close together. Next, the device is removed from the mouth and ears of the patient. The bite fork adapter is handed over to the dental technician along with the impressions.
Facebow overlay ensures correct orientation and movement of the patient's jaws.
The main advantages of the device
The advantages of the articulation arc include:
- reducing the number of visits to the prosthetist forinstallation of a prosthesis (it will take much less time to fit the structure);
- convenience and comfort of the finished prosthesis;
- reducing the period of getting used to the prosthesis;
- fast and effective recovery of chewing function;
- rational distribution of the load on the dentition, which increases the life of the prosthesis, as well as supporting molars and implants;
- Ensuring an aesthetic position of the front teeth in relation to the eyes, nose and lips;
- high level of aesthetics of the patient's smile;
- providing the possibility of checking and straightening the sides, axes and inclination of the teeth and cusps relative to the movement in the joint in the lateral and incisal direction.
What is the risk of improper orthopedic treatment?
In case of incorrectly performed orthopedic therapy without taking into account the peculiarities of the arrangement of the rows of teeth, the structure of the temporomandibular joint changes.
This could lead to development:
- arthrosis;
- migraines;
- discomfort when opening the mouth.
Therefore, the task of the orthopedic dentist and dental technician is not only to recreate the correct shape of the crown, but also to preserve the functionality of the temporomandibular joint.
The ability to ensure the correct position of the tooth in the arch is provided by the technique of using a facial arch and an individually selected articulator.
Prosthetic facebow application
In orthopedics, the facebow is used in the following cases:
- to set the status indicatorupper and lower jaw relative to the bones of the skull;
- for transferring the position of the upper jaw and the rotational axis of the lower jaw into the articulator;
- to determine the rotational axis of the condyle;
- to mark bite with silicone or thermoplastic material.
After the measurements are taken, the facial arch is removed, and the obtained data is transferred to the articulator. This device provides the ability to simulate the direction of the lower jaw.
Using the device in orthodontics
The orthodontic facebow is a device that is used to free up space in the dentition by moving the teeth back.
In orthodontics, the device is used in the following cases:
- to ensure proper positioning of posterior molars after crowded teeth have been removed;
- with severe crowding of the teeth located in front;
- to prevent early movement of the lateral teeth forward when correcting the position of the front teeth;
- for the correction of the jaws during their formation in adolescence;
- to correct bite and improve teeth alignment.
Recommendations for patients using facebow
If a patient needs to wear a facebow to eliminate any pathological process, then he must adhere to certain rules for using this device:
- In almost any case, the device is worn up to 12hours per day. Correcting an overbite requires wearing the appliance up to 14 hours a day.
- When wearing the device, you should visit the dentist's office every six months for sanitation of the oral cavity.
- In the presence of tissue diseases near the teeth, the facial arch is installed only after consultation with a periodontist.
- Before installation, it is imperative to eliminate all existing enamel defects, chips, and also check the integrity of seals and crowns.
- If the patient has an allergy, a full examination by an allergist is necessary.
- To eliminate the pathologies of the lower jaw, orthodontist treatment is insufficient. A dental surgeon must be involved in therapy.
- The duration of treatment with a device such as a dental articulator with a facebow ranges from several months to a year, depending on the complexity of the disorder.
- If, when using the device, such unpleasant symptoms as bleeding and swelling of the gums are noted, you should immediately consult a dentist. The doctor will adjust the pressure of the construct.
- The device is not used for active activities, as it can cause serious injury to the face. Particular attention is paid to the outer part of the device. It is recommended to wear a facebow while sleeping, while reading or watching TV. In particular, this recommendation applies to children, as they can injure their faces with sudden movements.
To the mostsafe devices include neck designs. For some indications, a head-mounted device is required. In this case, great care is needed. Such devices are especially dangerous during sleep, as they can easily come off and injure the face. To avoid an accident, it is advised to sleep exclusively on your back, after checking the reliability of the fastening of the structure. So the chance of injury will be minimized
If you follow all the precautions, wearing the facebow will be absolutely safe and will allow you to achieve a high level of efficiency in the field of teeth alignment and correction of malocclusion in a short time.
Effective model: articulation arch Asa Dental 5032
The Facebow Articulator, priced at RUB 22,900, is an ergonomic one-piece aluminum construction from an Italian manufacturer. The product is presented complete with bite forks and a table.
What is the advantage of the Asa Dental device? The facebow allows for individual positioning of the maxillary and mandibular models.
What metrics affect fixture cost?
The price of a structure is influenced by the following indicators:
- type of fixing device: head or neck;
- the condition of the patient's oral cavity;
- patient's age.
How much does it cost to install a device such as a dental articulatorwith a facial arc? The price is determined after a thorough examination of the patient and the study of images obtained using x-rays.
Orthodontic facebow is versatile but requires additional fitting. A panoramic x-ray of the oral cavity and an X-ray of both jaws are taken before the installation of the orthodontic arch.
The price of the facial bow for children and adults varies. On average, the cost of treatment with the use of a facial arch is from 2,500 to 9,000 rubles.
Conclusion
Articulator and facial arch in dentistry are integral attributes. Devices help to correct orthodontic defects, as well as to make individual orthopedic constructions.
