JPH0310981Y2 - - Google Patents

Description

[Detailed explanation of the invention] (a) Technical field of the invention This invention is a separate type dental pulp diagnostic device, in particular, the main body of the dental pulp diagnostic device held in the dentist's hand and the accessory case held in the patient's hand are separated. , by the current flowing from the dental pulp diagnostic device body to the patient's living body,
Relating to a separate type dental pulp diagnostic device that allows the patient to cut off the output current by pressing a switch provided on the attached case held by the patient when the patient feels pain due to the presence of residual pulp. It is something.

(b) Prior art and problems A stand-alone dental pulp diagnostic device has already been proposed and actually used. This type of conventional dental pulp diagnostic device includes a product name Valve Tester as shown in FIG. 3, for example. As such, a power source (battery) and, in some cases, even a display section are incorporated, and a predetermined current is caused to flow through the patient's dental pulp via the tooth conductor. At that time, the tooth guide constitutes one polarity (generally the positive pole), and the doctor's other hand that touches the patient's living body constitutes the other pole (generally the ground or negative pole). , forms a closed circuit with the patient's living body sandwiched between the two poles, and dials the magnitude of the current emitted from the tooth conductor 3 of the dental pulp diagnostic device.
The condition of the tooth pulp is detected by adjusting the condition, and its presence or absence is diagnosed.

In this way, when a gradually increasing current is passed from the device to the patient's living body, if there is residual pulp, the patient will complain of pain at a certain level of current. In this conventional diagnostic device, in this case, the patient must either raise his/her voice or raise his/her hand to appeal to the doctor and suspend the examination, or remove the doctor's hand that is touching the patient's body. I had no choice but to scream and interrupt the open circuit to escape the pain. This can be troublesome and can even damage interpersonal relationships.

Further, since the main body of the conventional dental pulp diagnostic apparatus of this type includes a power supply section, the main body of the apparatus is relatively large and heavy, and it cannot be said that it is easy to operate.

(c) Purpose of the invention The present invention is an attempt to solve the above-mentioned problems of the prior art.The present invention consists of a dental pulp diagnostic device body held in the dentist's hand and an attached case held in the patient's hand. Separately, the accessory case includes a power supply unit,
Other circuit parts that do not need to be incorporated into the main body and a stop switch that cuts off the output current to the living body are built in, and the two poles are separated by connecting the diagnostic device main body and the accessory case with a connecting cable. When the patient feels pain due to residual pulp,
If the patient holds the accessory case and immediately presses the stop switch, the circuit can be interrupted without any trouble.
It is an object of the present invention to provide a separate type dental pulp diagnostic device in which a numerical value corresponding to the current at that time is displayed on a display section on the main body side.

(d) Embodiment FIG. 1 shows the external appearance of a separate type dental pulp diagnostic device according to the present invention. In this device, a control section 101 and a display section 1 are included in a main body 100 held by a dentist.
02, an arm portion 104 including a tooth guide 103 and a socket (not shown) for receiving a power connector 105 are provided, and a tooth guide (reamer) 103 serving as one electrode (positive electrode) is connected to the patient's oral cavity. UP that adjusts the current flowing to the pulp of the tooth in stages
A switch (push button switch) W ₁ , a reset switch W ₂ , and a power switch W ₃ are provided. On the other hand, in the attachment case 200 held by the patient,
A stop switch W ₄ is provided to cut off the battery and the output current, and if you feel pain when the current is passed through the residual pulp of the tooth, press the switch W ₄ to stop the output current from the tooth conductor 103. patients are now able to self-block it. Also, if the patient holds the attached case 200 made of metal and holds it, the other electrode (ground) will be connected during operation.
to perform the function of Then, the main body 100 and the attachment section 200 are connected through the connection cable 300. Note that the power connector 105 is connected to the main body 200.
Even when removed from the main body, the main body may be able to operate independently as before.

In FIG. 1, the display unit 102 shows that the doctor inserts the power connector 105 into the main body 100, has the patient grasp the appendix 200, turns on the power switch _W3 , and starts the pulp diagnosis operation. It displays a numerical value corresponding to the current flowing through the current. Note that L indicates an alarm lamp that lights up when the power supply voltage of the battery drops.

FIG. 2 shows the configuration of a power supply circuit incorporated into the device of the present invention. In the figure, 10 is an oscillation circuit, 11 is a flyback circuit including a transformer, 12 is an output control circuit,
13 is a Miller integration circuit, 14 is a flip-flop, 15 is an automatic reset circuit, 16 is a battery drop detection circuit, 17 is a reference voltage circuit, 18 is a DC-DC converter, 19 is an A/D converter,
102 is a display section, 103 is a tooth guide, 200 is an accessory case for a patient, B is a battery, and L is a lamp (which may be a light emitting diode). Note that the display section 102, tooth guide 103, and lamp L correspond to those shown in the main body 100 in FIG. 1, and the attached case 200 corresponds to those shown in FIG. 1 with the same numbers.

Also, the UP switch W ₁ , reset switch W ₂ , power switch W ₃ , and stop switch in the circuit shown in Figure 2
_W4 also corresponds to each switch shown in FIG.

In operation, the oscillation output (for example, 100Hz) generated from the oscillation circuit 10 is transmitted to the tooth conductor 1 through a flyback circuit including an amplifier and a transformer.
03, the output thereof is configured so that it can be controlled in stages by an UP switch provided in the Miller integration circuit 13, and is controlled via the output control circuit 12. Flip-flop circuit 14
The state of the flip-flop 14 is changed when the patient feels pain due to residual pulp due to the output current flowing from the tooth guide 103 to the patient's living body and presses the stop switch W ₄ at hand. is reversed, and the output of the tooth guide 103 is stopped by the Q output, so that the pain is immediately relieved. The display section 102 shows UP switch (UP button) W ₁
When the output from the tooth guide 103 is increased step by step by pressing , the value corresponding to the output current is digitally displayed, and when the reset switch W ₂ is pressed, it is displayed as 00. , displays up to about 50. If the patient does not press the stop switch W ₄ even if the maximum current corresponding to the value 50 is applied,
It was determined that there was no residual pulp and no pain.

Operations of the A/D converter 19 and the DC-DC converter 19 that drive the display unit 102, as well as the battery voltage drop detection circuit 16, reference voltage circuit 17,
Since the operations of the automatic reset circuit 15 and the like are the same as well-known ones, detailed explanation will be omitted.

Next, steps for diagnosing the dental pulp will be explained with reference to FIGS. 1 and 2.

First, the dentist has the patient grasp the appendage case 200 and instructs the patient in advance to press the stop switch _W4 when the patient feels pain. At this time, it is assumed that the power supply connector 105 has already been inserted into the socket of the diagnostic apparatus main body 100. Next, the doctor turns on the power switch _W3 and begins preparations for diagnosis. When the power switch _W3 is turned on, the display section 102
If the display is not 00, press the reset button _W2 to set it to the initial state so that the display on the display section 102 becomes 00.

Next, the doctor
3 to the pulp in the patient's mouth, and press the UP switch W ₁
Press once. At this time, a certain current flows from the tooth conductor 103 to the patient. Each time the UP switch _W1 is pressed, a certain current step is applied to the tooth guide 103.
As already mentioned, the output current outputted from the motor increases in stages. Then, a numerical value corresponding to the output current is digitally displayed on the display section 102.

In this way, the doctor can use the UP switch W ₁ at hand.
For example, press 1 step at a time.
If the patient feels pain due to the residual pulp and presses the stop switch _W4 when the display 02 indicates the numerical value 40, the state of the flip-flop 14 in FIG. ,
This is done by cutting off the flyback circuit 11. However, at this time, the numerical value on the display section 102
40 is now displayed and stops.
Therefore, the doctor can judge how much pulp remains from the numerical value displayed at that time.

Note that even if the doctor presses the UP switch W _{1 one} after another and the value on the display unit 102 reaches the maximum value of 50,
If the patient does not press the stop switch _W4 , the diagnosis is concluded on the assumption that there is no residual pulp and therefore no pain.
In this way, while the display unit 102 is displaying from 00 to 50 (the step width may be set to any desired appropriate value), the number of steps varies according to the stage at which the patient presses the stop switch _W4 . , the doctor can know the condition of the tooth pulp from the remaining displayed values.

(e) Effects of the invention As mentioned above, in the separate type dental pulp diagnostic device according to the present invention, all the functions necessary for dentists to operate the diagnostic device manually are built into the main body of the diagnostic device, while the attached parts that are held in the patient's hands are not included. By incorporating a battery, a stop switch, and other circuitry that is not necessary in the main body into the case, the functions of the device required by the doctor and the minimum functions required by the patient are differentiated and separated. Therefore, when a patient feels pain during pulp diagnosis, the diagnostic operation can be stopped smoothly by pressing the stop switch at hand. Moreover, the numerical value corresponding to the output current at that time is conveniently displayed on the digital display section of the main body of the apparatus.

In addition, since the battery and other circuit parts that do not necessarily need to be housed in the main body can be housed in the accessory case on the patient side, the size and weight of the apparatus body can be considerably reduced, making it easier to operate.

In addition, since this type of conventional diagnostic device is a single stand-alone type, the dentist holds the diagnostic device in one hand, applies the tooth guide to the tooth pulp (positive electrode side), and uses the other hand to examine the patient. Since it touched the living body (ground side or negative electrode side) to form a closed circuit, it placed a heavy burden on the doctor, and the patient also had to be touched with one of the doctor's hands.

Conventional devices cause discomfort to the patient, but with the present invention, the doctor's free hand does not necessarily have to touch the patient (in addition to supporting and stabilizing the patient). ) This makes the patient feel more comfortable and allows diagnosis to be made without discomfort.

[Brief explanation of the drawing]

FIG. 1 is an external view of a separate type dental pulp diagnostic device according to the present invention, FIG. 2 is an electrical circuit diagram incorporated into the device of the present invention, and FIG. 3 is an external view of a conventional dental pulp diagnostic device. In the figure, 100 is the main body of the diagnostic device, 101 is the control unit, 102 is the display unit, 103 is the tooth guide, 104 is the arm, 105 is the power connector, 200 is the attached part, 300 is the connection cable,
W ₁ is UP switch, W ₂ is reset switch, W ₃
indicates the power switch, and _W4 indicates the stop switch.

Claims (1)

[Scope of utility model registration request] Dental pulp diagnosis comprising: an electrical control unit that controls an output current flowing into the patient's living body, a display unit that displays a numerical value corresponding to the output current, and a tooth conductor as one electrode that derives the output current. A connection cable that is provided separately from a device main body and an accessory case that includes a battery and other circuits that do not necessarily need to be accommodated in the main body and that serves as the other electrode, and that connects the device main body and the accessory case to each other. The main body of the device further includes a first switch for power supply, a second switch for adjusting the output current, and a third switch for resetting the output current and the display on the display section. The attachment case is equipped with a fourth switch that can cut off the output current, and during pulp diagnosis by operating the diagnostic device main body held by the doctor, the patient holding the attachment case detects residual pulp. By pressing the fourth switch when feeling pain due to the above, the output current from the main body of the device is cut off, and the numerical value at the time of the cutoff is displayed and left on the display section of the main body. A separate type dental pulp diagnostic device featuring: