A method for diagnosing inflammatory contractures of the lower jaw in inflammatory diseases of maxillofacial area

 

(57) Abstract:

Usage: in medicine, namely in dentistry, as well as for the diagnosis of inflammatory contractures of the lower jaw in inflammatory diseases of maxillofacial area. Spend the amount of thickening of the masticatory muscles using ultrasound at a frequency of 7.5-10 MHz and power of sound 40-60 dB by the formula

< / BR>
where a is the initial thickness of the muscle; the muscle thickness at maximum contraction, and if the percentage reduction is less than 25% diagnose inflammatory contracture. The method is effective, simple, safe for use and is an auxiliary examination method.

The invention relates to medicine, namely to the ultrasonic diagnosis in surgical dentistry.

A known method for the diagnosis of inflammatory contractures of the lower jaw using clinical examination of the patient ("dental Surgery" Ed. by Robotboy T. G., 1990, page 26). The disadvantages of this method is that it is subjective and does not allow full reliability to establish changes in the muscle tissue of the masticatory muscles in the inflammatory process.

The invention is directed to the solution is achieved with the help of ultrasound examination of the masticatory muscles and determine their percentage of thickening by a special formula. Inflammatory contracture is diagnosed when the decrease in this indicator is less than 25%.

The method is as follows.

The patient is seated next to an ultrasonic analyzer SIM 7000 CFM CHALLENGE. The doctor who did the diagnostics, is located opposite. The study is carried out using a microconvex probe with a frequency of 7.5-10 MHz and power of sound 40-60 dB. The sensor is applied ultrasonic gel. The sensor is installed in the projection of the masticatory muscles in such a way that the sector scan is parallel to the course of the muscle fibers. During the research, analyze the structure of the masticatory muscles, their exogenous density, presence of pathological inclusions.

At the first stage in the projection of the middle third of the muscle install the sensor determines the starting thickness of the masseter muscle.

In the second stage, carry out the thickness measurement of muscle while minimizing them, and both figures are determined on both sides.

To further determine the percentage of thickening of the muscles by the formula

< / BR>
where a is the initial thickness of the muscle,

In the thick muscle at maximal contraction.

In the normal control group of healthy individuals percentage of utase is 25%.

Example 1.

The patient was admitted to the hospital with complaints of pain in the left lower jaw, limited mouth opening, up to 1 cm In clinical examination of the inflammatory nature of the contracture is not precisely identified. Ultrasonic examination of the masticatory muscles at a frequency of 7.5 MHz and a power of 40 dB. Define the initial thickness of masticatory muscles: left - 8,1 mm, right - 7.2 mm; maximum muscle contraction: left to 10.7 mm, right - 11 mm

According to the formula

< / BR>
defined: to the left of 17.2%, the right - to 25.3%, on the basis of what is diagnosed inflammatory contracture on the left. Diagnosed with Cellulitis podrasterjavshego space left, carried out surgical treatment.

Example 2.

The patient was admitted to the hospital with complaints of difficult teething 8 tooth, limited mouth opening to 0.5, see Clinically to determine the contracture of the lower jaw was not possible. Ultrasonic examination of the masticatory muscles at a frequency of 10 MHz and a power of 60 dB. Define the initial thickness of masticatory muscles: left - 6.3 mm, on the right - 7.6 mm; maximum muscle contraction: left - 10,3 mm, right - 9,8 mm

According to the formula

< / BR>
defined: left - 38,8%, right - of 22.4%, ivania 8 tooth complicated by cellulitis kralovice-mandibular space to the right, carried out surgical treatment.

Example 3.

The subject from the control group. His mouth opens to 3 see ultrasonic examination of the masticatory muscles, the original thickness: left - 12,4 mm, right - 12.5 mm; maximum muscle contraction: left - 17.1 mm, right - 17,5 mm

According to the formula

< / BR>
defined: left - 27,4%, right up 28.5%.

On the basis of ultrasound inflammatory contracture of the masticatory muscles is not defined.

The positive effect from the use of the method lies in its objectivity, simplicity, speed and the absence of side effects when it is applied, auxiliary examination method.

A method for diagnosing inflammatory contractures of the lower jaw in inflammatory diseases of maxillofacial area, characterized in that conduct ultrasonic determination of the thickness of the masseter muscle at a frequency of 7.5-10 MHz, the power of sound 40-60 dB and calculate the percentage of thickening of the masticatory muscles by the formula

< / BR>
where a is the initial thickness of the muscle;

In the thick muscle at the maximum reduction and reduction of less than 25 percent

 

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