KR101089373B1 - Handpiece with measuring device of bone density - Google Patents

Abstract

The present invention relates to a handpiece equipped with a bone density measuring device, and more particularly, a handpiece main body, a disc interlocking with a central rotation axis inside the handpiece main body, provided in the handpiece, and rotating the disc. It includes a counting means for sensing the number and a control unit for controlling the driving of the handpiece, characterized in that for measuring the bone density of the teeth by counting the number of revolutions to decrease when drilling the handpiece.

Handpiece, photo coupler, photo coupler, bone density

Description

Handpiece with bone density measuring device {Handpiece with measuring device of bone density}

The present invention relates to a handpiece equipped with a bone density measuring device, and more particularly, a handpiece main body, a disc interlocking with a central rotation axis inside the handpiece main body, provided in the handpiece, and rotating the disc. It includes a counting means for sensing the number and a control unit for controlling the driving of the handpiece, characterized in that for measuring the bone density of the teeth by counting the number of revolutions to decrease when drilling the handpiece.

The present invention relates to a handpiece equipped with a device for measuring the bone density of a tooth, wherein the bone density indicates the hardness of the bone, and the higher the bone density, the harder the bone. The most accurate method for diagnosing bone density is to directly remove the bone and view it under a microscope, but it is impossible to apply it to the patient.

In particular, in the case of implantation, the diagnosis of bone density is one of the most important factors, but in most cases, the patient's bone density (bone) varies from patient to patient, and even in the same patient, it is a big problem during implantation.

In other words, if the patient's bone density (bone quality) is misidentified, more than 70% leads to implant failure.

Therefore, ordinary dentists perform an implant procedure after measuring bone density by experience or by X-ray or CT. However, experience is not objective data, and X-rays and CTs can only determine the average BMD of a patient. There was inconvenience in using.

In order to overcome the problem somewhat, QCT (Quantitative Computed Tomography) is used.

The QCT has the advantage of predicting not only the three-dimensional image of bone but also the structural stability of the bone. Despite these advantages, the cost of the QCT equipment is expensive and the radiation dose is several hundred times that of multi-order X-rays. There are many limitations to use as a method of measuring bone density.

The present invention has been made to solve the above problems, it is possible to immediately determine the bone density of the patient during the implant procedure to provide a bone density measurement apparatus that can reduce the treatment time, patient burden and installation cost The purpose.

In order to achieve the above object, the present invention provides a handpiece main body, a disc interlocking with the central rotation shaft inside the handpiece main body, provided in the handpiece, counting means for sensing the rotational speed of the disc and It includes a control unit for controlling the driving of the handpiece, characterized in that for measuring the bone density of the teeth by counting the number of revolutions that decrease during the drilling of the handpiece.

Preferably, the edge of the disc is characterized in that the grooves are formed at a predetermined interval.

Preferably, the counting means is provided as a photo coupler.

Preferably, the photo coupler is positioned so that the grooves pass between the light emitting portion and the light receiving portion.

Preferably, the outside of the handpiece body is characterized in that the mode selection button for selecting the bone density measurement work or the tooth drilling operation is further provided.

Preferably, the control unit further comprises a stop means for stopping the driving of the handpiece when the driving speed of the handpiece increases during bone density measurement.

Preferably, the outside of the handpiece main body is characterized in that it further comprises a speed adjusting means for controlling the drive speed of the handpiece.

Preferably, the handpiece body further comprises a drill size input means for inputting the size of the handpiece drill.

Preferably, the outer surface of the handpiece drill is characterized in that the ruler for measuring the thickness of the tooth cortical bone is formed.

Preferably, the outside of the handpiece main body is characterized in that it further comprises a display unit for displaying the rotational speed, the mode state, the handpiece driving speed and the handpiece drill size of the disc.

The present invention has the following excellent effects.

The patient's bone density can be directly determined during implantation, which reduces treatment time, patient's cost, and equipment installation cost, and enables the patient's condition to be checked at the same time as the procedure. Does not have an excellent effect.

The terms used in the present invention were selected as general terms as widely used as possible, but in some cases, the terms arbitrarily selected by the applicant are included. In this case, the meanings described or used in the detailed description of the present invention are considered, rather than simply the names of the terms. The meaning should be grasped.

Hereinafter, with reference to the preferred embodiments shown in the accompanying drawings will be described in detail the technical configuration of the present invention.

First, Figure 1 is a side cross-sectional view of the handpiece with a bone density measuring apparatus according to an embodiment of the present invention.

As shown in FIG. 1, the handpiece equipped with the bone density measuring device includes a handpiece body 110, a disc 130, a counting means, and a controller 150 for controlling the driving of the handpiece.

The handpiece main body 110 may be provided using various shapes and various materials, and one end of the handpiece main body 110 is provided with a drill 310 that can be attached and detached.

On the other hand, the inside of the handpiece main body 110 is provided with a central rotation shaft 120 for transmitting the rotational force of the drive motor provided in the inside or outside of the handpiece to the drill (310).

On the other hand, the disc 130 is provided inside the handpiece body 110, is coupled with the central rotation shaft 120 to rotate together.

In addition, grooves of a predetermined interval are formed at the edge of the disc 130, which will be described later.

In this case, the disc 130 may be made of various materials, and the grooves may also be formed in various forms.

The counting means is for counting the number of revolutions of the disc 130 in conjunction with the central rotation shaft 120 can be counted the number of revolutions of the disc 130 using a variety of means.

However, in a preferred embodiment of the present invention, as shown in Figure 1, the counting means uses a photo coupler consisting of a light emitting portion 140a and a light receiving portion 140b. .

Hereinafter, the photo coupler 140 will be described in detail.

In general, a photo coupler utilizes an advantage that the light emitting part and the light receiving part are electrically insulated from each other. The light emitting part has a light emitting diode, a tungsten lamp, a neon lamp, and a light receiving part has a silicon avalanche. Photodiode, pin diode, cadmium sulfide and cadmium selenium are used. Currently, the most popular is a combination of gallium arsenide infrared light emitting diodes and silicon photodiodes.

The light-emitting part and the light-receiving part are optically combined through a transparent resin, which is thickly covered with a black resin to block external light and add mechanical strength. For this reason, the breakdown voltage between the input and the output is several kV. In addition, when gallium arsenide aluminum is used in the light emitting portion and a pin diode high speed element is used in the light receiving portion, it can be used up to 100 MHz, and a flat frequency response can be obtained from DC to high frequency.

The photocoupler uses light, which is resistant to noise, insulates current between the devices constituting the system, and allows grounding for each device. In addition, since the coupling capacitance between devices is small, there is an advantage that the signal on the output side does not return to the input side. For this reason, when an electrical circuit, a terminal, etc. are combined by a photo coupler, circuit design becomes easy, without having to pay attention to the difference of a power supply voltage and the noise which a mechanical part produces.

The photo coupler also functions as a switch by blocking or passing light transmitted to the light receiving unit.

Hereinafter, the positional relationship between the disc 130 and the photo coupler 140 will be described in detail with reference to FIGS. 2A and 2B.

First, FIGS. 2A and 2B illustrate a disc 130 and a photo coupler 140 according to an embodiment of the present invention.

As shown in FIG. 2A, the light emitting part 140a and the light receiving part 140b constituting the photo coupler 140 are positioned to sandwich the disc 130 on which the grooves 131 are formed, and in particular, the disc 130. The groove 131 is disposed between the light emitting unit 140a and the light receiving unit 140b.

That is, when the disc 130 rotates, the grooves 131 pass between the light emitting part 140a and the light receiving part 140b of the photo coupler 140 to block the light emitted from the light emitting part 140a. It serves to pass.

Therefore, when the grooves 131 pass between the photo coupler 140, the light irradiated from the light emitting unit 140a reaches the light receiving unit 140b, but the portion where the grooves 131 are not formed passes. The light is blocked.

As a result, when the disc 130 is rotated, the photo curler 140 repeats on / off as a switch, and collects on / off data from the controller 150 to rotate the disc 130. The number will be determined.

In this case, the grooves 131 formed in the disc 130 may be preferably formed in plural as shown in FIG. 2A, but as shown in FIG. 2B showing another embodiment, the groove of the disc 130 is shown. 131 may be made of one.

On the other hand, the counting means used the photo coupler 140 in a preferred embodiment of the present invention, but can be used a variety of devices or sensors that can count the rotational speed of the disc 130 other than this, of course to be.

Hereinafter, a mode selection button, a stop means, a speed control means, a drill size input means, and a display unit according to an embodiment of the present invention will be described in detail with reference to FIG. 3.

First, Figure 3 is a mode selection button 210, a stop means (not shown), a speed control means 220, drill size input means provided in the handpiece provided with a bone density measuring apparatus according to an embodiment of the present invention 230 and the display unit 240 are shown.

Referring to FIG. 3, the mode selection button 210 is provided outside the handpiece body 110.

Therefore, the mode selection button 210 allows the user to select a mode for tooth drilling, which is a function of a general handpiece, and a mode for measuring bone density of teeth.

At this time, when selecting a mode for measuring the bone density, it will be linked with the stop means, the speed adjusting means 220 and the drill size input means 230 to be described later, it is displayed on the display unit 240 for the interlocking state.

On the other hand, the stop means is connected to the control unit 150 to stop the driving of the handpiece when the driving speed of the handpiece suddenly increases when measuring the bone density.

The reason for the stop means is that the density of the cortical bone constituting the tooth and the density of the sponges present in the lower portion of the cortical bone when bone density measurement is different from each other.

That is, the number of revolutions of the handpiece is reduced due to friction with the cortical bones when the bone density of the cortical bones having a relatively higher density than the cancellous bones is maintained to maintain a certain number of revolutions.

Afterwards, when the drill rotates to the sponge, which is low in density, the sponge is relatively low in density compared to the cortical bone, thereby increasing the rotational speed of the handpiece due to the friction between the drill and the sponge.

Therefore, in order to accurately measure the bone density of the cortical bone, the moment the speed of the handpiece is increased, the handpiece driving should be stopped and the rotation speed up to the moment of stopping should be determined.

To this end, the stop means transmits the increase signal to the controller 150 when the rotation speed of the handpiece momentarily increases, and the controller 150 stops driving of the handpiece.

The speed adjusting means 220 is provided outside the handpiece main body 110, and adjusts the driving speed, that is, the rotational speed of the handpiece according to the operator's selection.

For reference, the driving motor of the handpiece according to the exemplary embodiment of the present invention uses a rotational speed of 1000 rpm / min when mounting a drill size of 2 mm.

According to the operator, the driving speed of the handpiece may select a low or high driving speed based on 1000 rpm / min. In this case, an error may occur in the case of the present invention in which bone density is measured using the number of rotations of the handpiece. .

That is, the rotation speed of the handpiece is further reduced as the resistance to friction with the teeth becomes larger when selecting a lower driving speed. On the contrary, when the high speed drive speed is selected, the resistance due to friction with the tooth decreases, so that the number of rotations of the handpiece is reduced to make accurate bone density measurement difficult.

Therefore, in order to prevent an error occurring when measuring the bone density due to the difference in the driving speed, the display unit converts the rotation speed obtained through the selected driving speed into the rotation speed when the driving speed is 1000 rpm / min in the controller 150. By displaying on the unit 240, it is possible to perform accurate bone density measurement regardless of the driving speed.

On the other hand, the drill size input means 230 is provided outside the handpiece body 110, it is possible to input the size of the drill mounted on the handpiece.

The handpiece having a bone density measuring apparatus according to an embodiment of the present invention measures bone density through the rotational speed of the handpiece which is reduced by friction with teeth, so that friction is changed according to the size of the drill to determine bone density. The value will be different.

In order to prevent this, after inputting the size of the drill mounted on the handpiece through the drill size input means 230, the bone density is measured.

The rotational speed obtained through the control unit 150 is converted into a rotational speed that is reduced when the drill has an outer diameter of 2 mm and the rotational speed is 1000 rpm / min, and is displayed on the display unit 240. Regardless, accurate bone density values can be obtained.

In addition, the ruler 311 is formed on the outer surface of the drill 310 of various sizes so that the thickness of the cortical bone can be easily confirmed.

On the other hand, the display unit 240 is provided outside the handpiece main body 110, and displays the rotational speed of the disc, the mode state selected through the mode selection button, the drive speed of the handpiece and the handpiece drill size do.

In addition, the display unit 240 may display through various means such as LED, LCD, liquid crystal.

Hereinafter, the bone density measurement method of the handpiece having a bone density measuring apparatus according to an embodiment of the present invention will be described in more detail.

The present invention is coupled to the disk 130 by coupling to the central rotation shaft 120 of the handpiece.

In this case, a plurality of grooves 131 are formed at the edge of the disc 130. In one embodiment of the present invention, a total of 36 grooves 131 are formed.

Meanwhile, the grooves 131 pass between the light emitting part 140a and the light receiving part 140b of the photo coupler 140.

In a preferred embodiment of the present invention, the handpiece drive motor used a drive motor with a rotational speed of 1000rpm / min when the drill is equipped with an outer diameter of 2mm.

Therefore, the handpiece equipped with the bone density measuring device detects 36,000 on / off signals through the photo coupler 140 when idle for 1 minute.

Therefore, the number of revolutions of the handpiece may be counted through the sensed on / off signal.

However, when the bone density is measured through the handpiece, the on / off signal of the photo coupler 140 is reduced by more than 36,000 times due to friction between the drill and the teeth mounted on the handpiece.

At this time, the on / off signal of the reduced photo coupler 140 will vary depending on the bone density of the patient.

That is, in the case of poor bone density, the friction between the drill and the tooth is small, and thus less than 36,000 times, but in the case of good bone density, the friction is large, and the reduction is greater than 36,000 times.

Handpiece equipped with a bone density measuring apparatus according to an embodiment of the present invention is to use the principle as described above, it is easy and easy to measure the bone density value of the patient by directly comparing with the experimental data showing the bone density value according to each rotation number can do.

As described above, the present invention has been illustrated and described with reference to preferred embodiments, but is not limited to the above-described embodiments, and is provided to those skilled in the art without departing from the spirit of the present invention. Various changes and modifications are possible by this.

1 is a side cross-sectional view of a handpiece provided with a bone density measuring apparatus according to an embodiment of the present invention.

2A and 2B are views illustrating a disc and a photo coupler according to one embodiment of the present invention.

Figure 3 is a view showing a mode selection button, a stop means, a speed adjusting means, a drill size input means and a display unit provided in the handpiece with a bone density measuring apparatus according to an embodiment of the present invention.

Claims (10)

In a dental handpiece, Handpiece body; A disk interlocking with the central rotation shaft inside the handpiece body; Counting means provided in the handpiece, for detecting the number of revolutions of the disc; And And a controller for controlling the driving of the handpiece. The bone density of the tooth is measured by counting the number of revolutions decreased when drilling the handpiece, Handpiece with a bone density measuring device, characterized in that grooves of a predetermined interval is formed on the edge of the disc. In a dental handpiece, Handpiece body; A disk interlocking with the central rotation shaft inside the handpiece body; Counting means provided in the handpiece, for detecting the number of revolutions of the disc; And And a controller for controlling the driving of the handpiece. The bone density of the tooth is measured by counting the number of revolutions decreased when drilling the handpiece, The counting means is a handpiece having a bone density measuring device, characterized in that provided as a photo coupler (photo coupler). The method of claim 1, The counting means is a handpiece having a bone density measuring device, characterized in that provided as a photo coupler (photo coupler). The method according to claim 2 or 3, The photo coupler is a handpiece having a bone density measuring device, characterized in that the grooves are positioned between the light emitting portion and the light receiving portion. In a dental handpiece, Handpiece body; A disk interlocking with the central rotation shaft inside the handpiece body; Counting means provided in the handpiece, for detecting the number of revolutions of the disc; And And a controller for controlling the driving of the handpiece. The bone density of the tooth is measured by counting the number of revolutions decreased when drilling the handpiece, The handpiece having a bone density measuring apparatus further comprises a mode selection button for selecting a bone density measuring operation or a tooth drilling operation outside the handpiece main body. In a dental handpiece, Handpiece body; A disk interlocking with the central rotation shaft inside the handpiece body; Counting means provided in the handpiece, for detecting the number of revolutions of the disc; And And a controller for controlling the driving of the handpiece. The bone density of the tooth is measured by counting the number of revolutions decreased when drilling the handpiece, The control unit is provided with a bone density measuring device, characterized in that it further comprises a stop means for stopping the driving of the handpiece when the driving rotational speed of the handpiece during bone density measurement. In a dental handpiece, Handpiece body; A disk interlocking with the central rotation shaft inside the handpiece body; Counting means provided in the handpiece, for detecting the number of revolutions of the disc; And And a controller for controlling the driving of the handpiece. The bone density of the tooth is measured by counting the number of revolutions decreased when drilling the handpiece, The handpiece having a bone density measuring device further comprises a speed adjusting means for controlling the driving speed of the handpiece outside the body of the handpiece. In a dental handpiece, Handpiece body; A disk interlocking with the central rotation shaft inside the handpiece body; Counting means provided in the handpiece, for detecting the number of revolutions of the disc; And And a controller for controlling the driving of the handpiece. The bone density of the tooth is measured by counting the number of revolutions decreased when drilling the handpiece, The handpiece having a bone density measuring device further comprises a drill size input means for inputting the size of the handpiece drill outside the handpiece body. In a dental handpiece, Handpiece body; A disk interlocking with the central rotation shaft inside the handpiece body; Counting means provided in the handpiece, for detecting the number of revolutions of the disc; And And a controller for controlling the driving of the handpiece. The bone density of the tooth is measured by counting the number of revolutions decreased when drilling the handpiece, A handpiece having a bone density measuring device, characterized in that a ruler for measuring the thickness of the cortical bone is formed on the outer surface of the handpiece drill. The method of claim 1, The handpiece having a bone density measuring apparatus further comprises a display unit which displays the rotational speed, the mode state, the handpiece driving speed and the handpiece drill size of the disc outside the handpiece main body.

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