Method and device for measuring the maximum compression force of the teeth

 

The invention relates to medicine, namely to the dentist, and can be used to measure the pressure on the teeth, provided the chewing muscles during sleep when pressing when marxisme. The technical result of the invention is to improve the measurement accuracy by measuring the uncontrolled mind chewing pressure during sleep, the possibility of perception of masticatory pressure in vertical and horizontal directions and the measurement of the load in the dynamics. The method consists of measuring the maximum compression force of the jaws by applying the device on the tooth surface, exert pressure and measuring the force of compression. The device is fixed at 6; tooth, the patient is placed in polysomnographically room to sleep at least 12 hours, after this time the device is removed, take out the bulbs and measure the total area of the fingerprints of all the balls on two sides under the microscope using a template, and then to determine the maximum compression force of the teeth build a graph where the horizontal axis lay the magnitude of the deforming efforts, and the vertical total size prints of all the balls on both sides. The device DL is 8-9 measuring balls with a diameter of 2 mm, made of plastic, metal alloy, and the free space between the crowns of the filled silicone composition, the lower crown repeats occlusal surface 6; tooth, and the upper occlusal surface of the lower crown. 2 N. p. F.-ly, 2 Il.

The present invention relates to medicine, namely to the dentist, and concerns the measurement of pressure on the teeth, provided the chewing muscles during sleep when pressing when bruxism.

The main symptoms of bruxism is hypertonicity of the masticatory muscles, which leads to disease TMJ, periodontal tissues and pathological abrasion of hard tooth tissue. The result of hypertonicity of the masticatory muscles is the lack of relative physiological rest and busisiwe, uncontrolled chewing, night grinding.

The measurement of the maximum compression force of the teeth have been studied by many authors.

So, there is a method of determining the threshold of sensitivity of the teeth to periodontal chewing pressure and a device for its implementation (see Conosco D. P. Orthopedic dynamometer. //Dentistry, 1950, No. 2, pp. 51-53).

There is a method of measurement is etnicheskie device for measuring the pressure transfer through the teeth on the periodontium. //Stomatology, No. 3, 1974, S. 86).

There is a method of study the sensitivity of the teeth to periodontal chewing pressure and a device that consists of a metal casing having the shape of a segment of a cylinder, with one end closed and the other end has a graduated scale and an arrow inside the spring is connected to the tip. For implementing the method the tip of the device placed on the surface of the investigated tooth and the doctor has a small, gradually increasing the pressure of the hand on the housing. The pressure which affects the tooth arrow appears in the device (see Kleytman I. A. Gnaedinger. //Dentistry, 1950, No. 2, pp. 51-53).

The closest analogue is the way of measuring the maximum compression force of the jaws by applying the device, including Nakonechny element, exert pressure and measuring the force of compression (SU 1637782 A1, 30.03.1991).

However, all known methods and apparatus imperfect, because the chewing pressure may be measured only in the waking state of the patient, which is controlled by consciousness, need for support and supervision of the researcher, the study of the force of contraction of the masseter muscle were taken into account mainly in the knosti measurement by measuring the uncontrolled mind chewing pressure during sleep, the possibility of perception of masticatory pressure in vertical and horizontal directions and the measurement of the load in the dynamics.

New in the achievement of the technical result is that the measurement of the compression force of the teeth provide the results according to the total area of the deformation measuring balls device from the force of contraction of the masticatory muscles.

New is also that the measurement is carried out during sleep.

What is new is that the device consists of two metal crowns, and lower repeats the occlusal surface of the tooth, and the upper occlusal surface of the lower crown and between crowns are 8-9 measuring balls.

New is also that the measuring balls have a diameter of 2 mm and made of a ductile metal alloy, and the free space between the crowns of the filled silicone composition.

The measurement of the maximum compression force of the teeth during sleep allows you to define the chewing pressure, uncontrolled consciousness, which is the main damaging factor in bruxism, which increases the measurement accuracy, and also allows the measurement of the load in the dynamics.

The total area deformalities device in the form of crowns provides good fixing of the device on the tooth surface, which in turn provides improved measurement accuracy.

Execution crowns appropriate occlusal surface allows not to overstate interarch height is greater than the difference between the height relative physiological rest and the height of the Central occlusion.

The number and diameter of balls is defined by the author empirically.

Silicone composition, which fills the free space between the crowns, fixation of balls and sticks crowns between them, which increases the measurement accuracy.

Comparative analysis shows that the inventive method and device are different from the prototype that the measurement of the compression of the teeth provide the results according to the total area of the deformation measuring balls device from the force of contraction of the masticatory muscles, the measurement carried out during sleep; the device consists of two metal crown and the lower crown repeats the occlusal surface of the tooth, and the upper occlusal surface of the lower crown, between the crowns are 8-9 measuring balls with a diameter of 2 mm, made of plastic, metal alloy, and the free space between the set of essential features can improve the accuracy of the measurement due to the measurement uncontrolled mind chewing pressure during sleep, enables perception of masticatory pressure in vertical and horizontal directions and the measurement of the load in the dynamics, which corresponds to the criteria of the invention “industrial applicability”.

The method is as follows. Previously to obtain a template of the measurement values of the force are doing a series of model devices with the same given number of measuring balls. The device passing by reference media with different strengths and on the measuring microscope to determine the size of the prints.

To measure the maximum compression force of the teeth of the device impose on 6; tooth, fix it on pasta Repin and leave for 12 hours with 20 p.m. to 8 a.m. To do this, place the patient in polysomnographically Cabinet. The device in the morning, take off, take out the balls on their surface as a result of plastic deformation remain flat prints. Under the microscope using a template with divisions determine the total area of the deformation. The results build a graph where the horizontal axis lay the magnitude of the deforming efforts in kg force, and the vertical total area of the diameters of the fingerprints of all the balls from two sides in square millimeters.

The proposed device is shown in Fig.1, where 1 is the lower crown, 2 - upper crown, 3 - test the bulbs, 4 - silicone composition.

The device consists of two metal crowns 1 and 2, the lower crown repeats the occlusal surface of the tooth. The upper crown repeats the shape of the lower crown. Between the crowns are measuring the balls 3. Measuring balls made of shiny white metal alloy includes tin 94-96% and lead 4-6%. The free space between the crowns 1 and 2 are filled with a silicone composition 4, which locks the measuring balls 3 and binds the crown 1 and 2 together. The diameter of the balls 2 mm, 8-9 pieces.

The proposed method and the device are illustrated in the following clinical example.

Sick company Oksana G., age 18, a student, was referred to the clinic of orthopedic dentistry with complaints grinding of teeth during sleep, change in appearance, pain in the masticatory muscles in the morning, aching pain in the temporomandibular joint, upper and lower jaws. History: teeth grinding in early childhood. Pain in the masticatory muscles appeared 4 years ago. Appealed to the otolaryngologist, neuropa helped. Except for the night rasps and pain, the patient notes difficult falling asleep or insomnia, later awakening, headaches, pressure in the temples and frontal region of the head, temper, crying, incontinence, depression, wince at the sudden sound, or touch, cramps in the calf muscles, fatigue, reduced concentration, dizziness, menstrual disorders, cold and wet hands, oily seborrhea of the scalp. Night grinding his father had, he died at 32 years of alcoholism, my mother, my grandmother on my father's lineage. Objective: Extraoral-asymmetry of the face, the lower jaw is shifted to the right, the lower third of the face is not changed. The lower jaw when opening makes zigzag movement, maximum mouth opening is 3.5 cm (normal is 4.5-5 cm). Masseter, temporal and actually chewing gipertrofirovannyy, painful on palpation. Dense. Palpation of the temporomandibular joint painless. The height of the lower third of the face in a state of relative physiological rest is 6.4 cm, and in the position of Central occlusion also 6,4 see Intraoral: in the mucosa of the cheeks on line clamping teeth and Bokovoythere are playgrounds pathological abrasion, Treme and diastemas, the mucous membrane of the gums slightly hyperemic, there is a visible exposure of the cement root of 1 mm, the depth of gingival pockets in the area 21 12 is 1 mm Miraslava line the upper and lower jaw do not match, the lower jaw is shifted to the right by 3 mm Motonautique research has shown that the tone of the temporal muscle on the right and left in a relaxed state is 120 g, the voltage of 130 g, masticatory muscles on the left and right alone 90 g, the voltage 135-140, in order To be diagnosed as “bruxism”, we need to fix the “grinding” during sleep and to determine the strength of the muscle is reduced. To do this, the patient is placed in polysomnographically office, where from 20 hours to 8 a.m. synchronously record electromyography, electroencephalography and gadodiamide. Maximum compression of the jaws is determined by the device, which impose on 6; tooth and fixed on pasta Repin. In the morning the unit off, open and take out the measuring balls. Under the microscope using a template with divisions determine the total area of deformation and build schedule. The total area of deformation was the nd: Bruxism. Moderate severity. Secondary deformation of the dentition and occlusion, pain dysfunction syndrome, temporomandibular joint.

Claims

1. The method of measuring the maximum compression force of the jaws by applying the device on the tooth surface, exert pressure and measuring the force of compression, characterized in that the device according to p. 2 fixed 6; tooth, the patient is placed in polysomnographically room to sleep at least 12 hours, after this time the device is removed, take out the bulbs and measure the total area of the fingerprints of all the balls on two sides under the microscope using a template, and then to determine the maximum compression force of the teeth build a graph where the horizontal axis lay the magnitude of the deforming efforts and the vertical total size prints of all the balls on both sides.

2. The device for maximum compression force of the teeth, including Nakonechny element, characterized in that it consists of two metal crowns, between which there are 8-9 measuring balls with a diameter of 2 mm, made of plastic, metal alloy, and the free space between coroncina - occlusal surface of the lower crown.

 

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