KR100939227B1 - Method for measuring of bone density for implant - Google Patents

Abstract

PURPOSE: An implant bone density measurement method is provided, which can conveniently measure the bone mineral density of the jaw bone and the alveolar bone. CONSTITUTION: A measurement tap equipped in a handpiece is inserted in drilling work for implanted groove formation. A screw thread is formed in the insertion groove by the measurement tap. The torque value is calculated using the torque sensor prepared within the handpiece from electrical measured value which is created when a screw thread is formed. The torque sample value is calculated based on the detected torque value. The bone density value is determined by comparing the size of the torque sample value with the set comparison value.

Description

Method for measuring bone density for implants {Method for measuring of bone density for implant}

The present invention relates to a method for measuring bone density for implants, and more particularly, to a method for measuring bone density for implants capable of measuring bone density of alveolar bone and jaw bone in which an implant is performed.

In general, when a dental implant is performed to replace a damaged tooth in a dentist, a fixture, which is a screw-shaped artificial tooth fixture that serves as an artificial tooth root, is used. At this time, the fixture is placed in the jawbone jaw in the oral cavity is used as a fixed source, in order to install the fixture on the jaw bone drive device with a built-in micromotor, and detachably coupled to the front end of the drive device An implant-driven power tool is used, which is formed with an inclined front end and a handpiece in which a dental drill or a driver is detached from the head.

Furthermore, the handpieces are divided into two for drilling and fixture fastening according to the working purpose of the reduction gear device installed therein, and each one is provided in one set. The drilling handpiece has a reduction ratio of 16: 1. The built-in gear device reduces the rotational force transmitted from the micromotor sufficiently to minimize the heat generation by friction with the jawbone during drilling, so that the bone tissue is not damaged by the friction heat, and the fixation handpiece has a reduction ratio It has a built-in reduction gear unit of 256: 1, so that the rotation torque is further increased instead of drastically reducing the rotation speed, so that the fixture can be more easily fastened to the jawbone.

On the other hand, when the screw-shaped fixture is placed in the jaw in the oral cavity, the device and the surgical aids that help to be placed in the correct position is poor, so the operation is sensitized depending on the clinical experience of the orthodontist or surgeon. This is often the case.

Here, such a method sometimes results in the fixture being misplaced, damaging the roots of adjacent teeth or causing the fixture to fail. Therefore, it is very important to put the fixture in the correct position.

Through this, various methods for predicting bone density in artificial tooth implantation for implantation of implants are recently used. In detail, the bone density of the jaw calculated by oral X-ray or computed tomography (CT) was compared with the bone density measured by the BMD of the radius of the radial part of the human body The method is mainly used.

In this case, the most accurate method for predicting bone density is a method of comparing an image of a region of interest (ROI) of the alveolar bone and jawbone with an image processing technique and comparing it with actual bone density using CT imaging. Here, the bone density comparison method can calculate a comparative objective bone density, but the cost is expensive, the use of CT imaging in the domestic use of artificial tooth implantation is limited.

Therefore, it is common to judge the bone quality by qualitative evaluation and to determine the outer diameter size of the final drill through the drill resistance when drilling the alveolar bone for fixation placement based on the experience of the operator.

On the other hand, the conventional bone density measurement method for the implant as described above had the following problems.

First, the method of determining the bone density of the alveolar bone and jaw portion using CT imaging is relatively accurate, but it is not economical in terms of time and cost, and it can not be applied in a non-equipped treatment environment. There is this.

Second, since qualitative judgment of bone quality using drilling resistance during drilling work is based on the experience of the operator, it can induce anticipated insertion torque and big error in the actual fixture placement. There is this difficult problem.

Third, the fixture placement work in the alveolar bone by the operator's experience not only reduces the accuracy, but also causes a problem in that the living tissue of the fixture around the fixture is necrotic due to malfunction due to the malfunction of the drilling work by the operator.

In order to solve the above problems, an object of the present invention is to provide an implant bone density measurement method that can easily measure the bone density of the alveolar bone and jaw bone is implanted.

In order to achieve the above object, the present invention is an implant for orthodontic teeth by a handpiece provided with a fixture that is implanted in the alveolar bone used as a fixed source, and a drill forming an implantation groove for implanting the fixture 1. A method for measuring bone density for a body, the method comprising: inserting a measuring tab provided in the handpiece during a drilling operation for forming the placing groove; Forming a screw thread in the insertion groove by the measuring tab; Calculating a torque value from electrical measurements generated when the thread is formed by using a torque sensor provided in the handpiece; And calculating bone density information based on the detected torque value.

The calculating of the bone density information may include calculating a torque sample value based on the detected torque value, and determining a bone density value by comparing the magnitude of the calculated torque sample value with a preset comparison value. It is preferable to include.

In this case, the calculating of the torque sample value may include the units of the calculated torque values from the initial time when the measurement tap is inserted into the insertion groove to the final time corresponding to the end of the insertion groove. And calculating the torque sample value by cumulatively summing the torque values per hour.

In the calculating of the torque sample value, the calculated torque values may be inserted into the insertion groove, and each unit may be formed from an initial point at which the torque value is measured to a final point corresponding to an end of the insertion groove. Comprising the cumulative sum of the torque value per depth may be made to include a step of calculating the torque sample value.

In the calculating of the torque sample value, the maximum torque measured at the time of tapping from the initial time point at which the torque value is measured by inserting the measurement tab into the insertion groove to the final time point corresponding to the end of the insertion groove is torqued. It may also comprise the step of calculating the sample value.

On the other hand, the step of determining the bone density value is a step of determining the bone density less than the first set value of the torque sample value is a predetermined comparison value as a soft bone, and if the bone set value is greater than the first set value and less than the second set value is determined as a normal bone And determining the bone density exceeding the second predetermined value as a hard bone.

The torque sensor calculates the torque value by converting an electrical resistance value generated in the thread by the measuring tap into a torque value, which is proportional to the electrical measured value per unit time when the thread is formed in the measuring tap. And multiplying a constant to obtain the torque value.

In addition, the diameter size of the measuring tap provided in the handpiece exceeds the primary drill diameter to form the initial insertion groove, preferably less than the final drill diameter for implantation of the fixture.

Herein, the torque sensor calculates an electric resistance value measured per unit time when the thread is formed by the measuring tap as a torque value, and the calculating of the bone density information is a torque in which the calculated torque values are formed for each unit time. And determining the bone density value by comparing the slope value of the line with a preset comparison value.

In addition, the handpiece is provided with a depth sensor, the torque sensor is preferably to calculate the electrical resistance value measured per unit depth when forming the thread by the measuring tap using the depth sensor as a torque value. .

On the other hand, the present invention is an implant bone density measurement method for orthodontic teeth by a handpiece provided with a fixture that is placed in the alveolar bone used as a fixed source and the implantation groove for implanting the fixture when the orthodontic tooth is corrected The method of claim 1, further comprising: forming a thread in the insertion groove by the measuring drill during the drilling operation for forming the insertion groove; Calculating a vertical force value from electrical measurements generated when the thread is formed by using a vertical force sensor provided in the handpiece; And calculating bone density information based on the detected vertical force values.

The calculating of the bone density information may include calculating a vertical force sample value based on the calculated vertical force values, and determining a bone density value by comparing the magnitude of the calculated vertical force sample value with a preset comparison value. It is preferable to comprise a.

At this time, the step of calculating the vertical force sample value is the unit of the calculated vertical force values from the first point where the measuring drill is inserted into the insertion groove to the final point corresponding to the end of the insertion groove is measured vertical force value And cumulatively summing the vertical force values per depth to calculate the vertical force sample values.

In the calculating of the normal force sample value, each unit from the initial time point at which the vertical force value is measured by inserting the measured drill into the insertion groove by measuring the vertical force values to the final point corresponding to the end of the insertion groove is measured. And cumulatively summing the vertical force values per hour to calculate the vertical force sample values.

And, the step of calculating the vertical force sample value is the maximum vertical force value measured at the time of tapping from the initial time the torque is measured by inserting the measurement drill into the insertion groove to the final time corresponding to the end of the insertion groove It may also comprise the step of calculating the normal force sample value.

At this time, the step of determining the bone density value is a step of determining the bone density of the vertical force sample value is less than the first set value which is the predetermined comparison value as a soft bone, and when the value is greater than the first set value and less than the second set value, the normal bone. And determining the bone mineral density exceeding the second set value as a hard bone.

Here, the vertical force sensor calculates a vertical force value from the electrical resistance generated in the thread by the measuring drill, but multiplying the electrical measured value measured per unit time when the thread is formed in the measuring drill by the proportional constant to the vertical force value It is preferable to include the step of calculating this.

Further, the handpiece is provided with a depth sensor, the vertical force sensor is to calculate the electrical measurement value measured per unit depth in the formation of the thread by the measuring drill using the depth sensor as a vertical force value.

When explaining the effect of the bone density measurement method for implants according to the present invention described above are as follows.

First, the diameter of the final drill suitable for the alveolar bone can be selected by determining the bone mineral density of the alveolar bone for implantation, so that not only the fixation state of the fixture can be firmly fixed in the implantation groove of the alveolar bone but also the fastening force of the initial fixation state is good. By doing so, securing of the initial fixing force can be facilitated.

Second, by determining the bone density value of the alveolar bone, selecting the appropriate final drill and inserting the fixture into the implantation groove, thereby preventing over-torque, and causing biological tissue of the bone around the fixture caused by over-torque to be necrotic Can also be prevented.

Third, by selecting the diameter of the final drill suitable for the alveolar bone by determining the bone mineral density of the alveolar bone for implantation, it is not only easy to use the operator who does not have a lot of implant treatment experience, but it is easy to use and has the accuracy, so it is a safe implant. Since the procedure is possible, there is an advantage that the anxiety felt by the patient undergoing the implant surgery is resolved.

Hereinafter, a method for measuring bone density of an implant according to a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

1 is a block diagram showing a bone density measurement method for an implant according to an embodiment of the present invention.

As shown in Figure 1, the bone density measurement method for an implant according to an embodiment of the present invention, first implanted in the alveolar bone 10 during orthodontic fixation and used as a fixed source, the implantation for implanting the fixture The treatment plan of the implant treatment method for orthodontic teeth is established by the handpiece 100 provided with the drill forming the groove 20.

Here, after the treatment plan is established, a drilling operation for forming the implantation groove 20 is performed. When the insertion groove 20 is formed by the drilling operation, the measurement tab 200 provided in the handpiece 100 is inserted into the insertion groove 20.

At this time, the thread 30 is formed in the insertion groove 20 by the measuring tab 200.

On the other hand, the handpiece 100 is provided with a torque sensor 110 for detecting the electrical measurement value generated when the thread 30 is formed in the insertion groove 20 by the measuring tab 200. Through this, the electric measurement value generated when the thread 30 is formed by the torque sensor 110 is detected to calculate the torque value. Here, the detected torque value determines the bone density value of the alveolar bone 10 in which the implantation groove 20 is formed by calculating bone density information. Here, the electrical measurement value according to an embodiment of the present invention corresponds to the current value.

Therefore, when the bone density value of the alveolar bone 10 is determined, the diameter of the final drill corresponding to the bone density value is determined, and a fixture is inserted into the insertion groove 20 of the alveolar bone 10 by the final drilling operation. It is placed in a firm fixed state.

Here, the step of calculating the bone density information can be described with reference to FIG.

Figure 2 is a flow chart showing the step of calculating the bone density information of the bone density measurement method for implants according to an embodiment of the present invention.

As shown in FIG. 2, the calculating of the bone density information may include calculating a torque sample value from the calculated torque values (S1), and comparing the calculated torque sample value with a preset comparison value. And determining the bone density value (S2).

Here, the step of calculating the torque sample value, as shown, each unit from the initial point of time when the measurement tap is inserted into the insertion groove to measure the torque value to the final time corresponding to the end of the insertion groove The torque sample value may be calculated by accumulating and summing the torque values per hour (S1), but the present invention is not limited thereto, and the measured tap values are inserted into the insertion groove from the first tapping point where the torque value is measured. The torque sample value may be calculated by accumulating and summing the torque values per unit depth up to the final point corresponding to the end of.

Furthermore, the maximum torque measured when tapping from the initial time point at which the torque value is measured by inserting the measurement tap into the insertion groove to the final time point corresponding to the end of the insertion groove may be calculated and used as a torque sample value.

In this case, the torque value T is calculated by multiplying the current value C, which is an electric measurement value measured per unit time, when the thread 30 is formed in the measurement tap 200 by a proportional constant α. Here, the proportional constant α is a constant value derived from clinical experimental results.

In addition, the step of determining the bone density value (S2) is, as an example of the above-described method, the cumulative sum of the torque value per unit time to the per unit depth or the torque sample value (S) calculated from the maximum torque value is the first Determining the bone density below the set value as the soft bone (S3), determining if the bone density is greater than the first set value but less than the second set value (S4), and determining the bone density exceeding the second set value as the hard bone ( S5) is made.

Here, the first set point and the second set point is preferably a predetermined value derived from the clinical experimental results, the bone density determination step according to an embodiment of the present invention is a soft bone, normal bone and hard bone of Although it consists of three steps, a more detailed classification is also applicable, and moreover, all of these classification methods correspond to various embodiments of the present invention.

On the other hand, it is difficult to determine the bone density value by calculating the torque value for each unit time to the unit depth and compare the respective torque value, respectively, so for convenience the bone density value is determined through the torque sample values defined in the above manner Will be done.

3A and 3B illustrate a torque-time diagram and a torque-depth diagram of a method for measuring bone density for an implant according to an embodiment of the present invention.

As shown in Figure 3a, in the torque-time diagram of the bone density measurement method for implants of the present invention, the time value for each unit time is arranged on the horizontal axis, the torque value is arranged on the vertical axis.

Here, the torque-time diagram is a torque value of each unit time as one point from the initial time torque value point of the measurement tap 200 inserted into the insertion groove 20 to the end of the insertion groove 20 It is formed as a linear continuous curve up to the corresponding final time torque value point.

In this case, the torque values calculated for each unit time are represented by respective points on the horizontal axis and the vertical axis, and one point and the other point adjacent to each other are connected by a straight line perpendicular to the horizontal axis to form one closed curve. Through this, the area value of the closed curve can be calculated, and the total area of the closed curve area from the origin to the right final point is accumulated. The cumulative value is calculated by integration.

The sum of the total area of each closed curve area is compared with a comparison value preset in the determination of the bone density value. Through this, as described above, the bone density value is determined as the soft bone, the normal bone and the hard bone according to the comparison of the first set value and the second set value.

On the other hand, as shown in Figure 3b, in the torque-depth diagram of the implant bone density measurement method of the present invention, the depth value for each unit time is arranged on the horizontal axis, the torque value is arranged on the vertical axis.

Here, the torque-depth diagram corresponds to the end portion of the implantation groove 20 from the initial depth torque value point of the measurement tap 200 inserted into the implantation groove 20 with a torque value per unit depth. It is formed as a linear continuous curve up to the final depth torque value point.

In addition, the handpiece 100 is provided with a depth sensor 130, the torque sensor 110 by using the depth sensor 130, when the thread 30 is formed by the measuring tap 200 The electric value measured per unit depth is calculated as the torque value.

Here, the torque values calculated per unit depth are represented by respective points on the horizontal axis and the vertical axis, and one point and the other point adjacent to each other are connected by a straight line perpendicular to the horizontal axis to form a closed curve. Through this, the area value of the closed curve can be calculated, and the cumulative value is calculated by integrating the sum of the total area of the accumulated closed curve area from the origin to the right final point.

As a result, the sum of the total area accumulated in each closed curve area is compared with the comparison value preset in the determination step of the bone density value, and thus the bone density value is determined as the soft bone, the normal bone, and the hard bone. In this case, the predetermined comparison value is preferably applied to the first set value and the second set value.

In addition, Figure 4 is an exemplary view showing the data detected by the torque-depth diagram of the bone density measurement method for implants according to an embodiment of the present invention.

As shown in Figure 4, the torque-depth diagram of the bone density measurement method for implants of the present invention is the initial depth torque value of the measurement tap 200 inserted into the insertion groove 20 to the torque value per unit depth A linearly continuous curve is formed from the point to the final depth torque value point inserted into the end of the insertion groove 20 to represent three types of torque-depth diagrams corresponding to the soft bone, the normal bone and the hard bone. This indicates that the bone density value is determined.

On the other hand, Figure 5 shows a torque-time diagram and a torque-depth diagram to determine the bone density value through the slope value per unit time and per unit depth according to an embodiment of the present invention.

As shown in FIG. 5, the torque-time plot and the torque-depth plot measure the inclination value for each section per unit time or per unit depth, and determine the bone density value by comparison with a preset comparison value. Here, the predetermined comparison value is preferably applied to the first set value and the second set value as described above.

On the other hand, the torque-time diagram and the torque-depth diagram are generally in the form of a curve that gradually rises after reaching a certain point after the torque value rises sharply at the beginning according to the hardness of the alveolar bone and jawbone of the human body. Is achieved.

Here, the uniformly shaped form of the curve represents the torque value measured in the measuring tap 200 is inserted into the insertion groove 20 of the alveolar bone 10 per unit time or per unit depth, but the torque The curve of the value may also be represented by a horizontal line in which the initial torque value and the final torque value form a constant value. Furthermore, the curved shape of the torque value per unit time or per unit depth may be formed in various forms, and the various curved forms correspond to various embodiments of the present invention.

Figure 6 shows the maximum torque-time diagram and the maximum torque-depth diagram of the bone density measurement method for implants according to an embodiment of the present invention.

As shown in Figure 6, the maximum torque-time plot of the bone density measurement method for implants of the present invention, the time is arranged on the horizontal axis, the maximum torque value is arranged on the vertical axis.

At this time, the torque sensor 110 converts the electrical maximum measurement value generated in the screw thread 30 formed in the insertion groove 20 by the measuring tap 200 to the maximum torque value. Here, the electrical maximum measurement value according to an embodiment of the present invention means a maximum current value.

Here, the maximum torque-time line is linearly from the initial time torque value point of the measuring tap 200 to the final time torque value point corresponding to the end of the insertion groove 20 in the insertion groove 20. Form a continuous curve.

At this time, the maximum torque value in the curve is calculated as the torque sample value to determine the bone density value by comparison with a preset comparison value.

In detail, the calculating of the bone density information may include determining the bone density below the first set value as a soft bone by comparing the calculated maximum torque value with a preset comparison value, and when the bone density is greater than or equal to the first set value and less than or equal to the second set value. And determining the bone density value as the hard bone from the bone density exceeding the second set value.

Meanwhile, the handpiece 100 is provided with a depth sensor 130, and the torque sensor 110 uses the depth sensor 130 to form the thread 30 by the measuring tap 200. The electrical maximum measured value is calculated as the maximum torque value.

Here, the maximum torque-depth curve corresponds to the end portion of the insertion groove 20 from the initial depth torque value point of the measurement tap 200 inserted into the insertion groove 20 to the torque value per unit depth It is formed as a linear continuous curve up to the final depth torque value point. At this time, the bone density value is determined by comparing the maximum torque value with a preset comparison value in the curve of the maximum torque-depth curve.

In addition, the maximum torque-time diagram corresponds to the end of the insertion groove 20 from the initial time torque value point of the measurement tap 200 inserted into the insertion groove 20 to the torque value per unit time point Form a linear continuous curve up to the point of the last time torque value. At this time, the bone density value is determined by comparing the maximum torque value in the curve with a predetermined comparison value.

Figure 7 is a state diagram showing the operating state of the measuring tap is inserted into the insertion groove according to an embodiment of the present invention.

As shown in FIG. 7, the implantation groove 20 formed in the alveolar bone 10 has a thread 30 when the measuring tab 200 is inserted and tapped after the primary drilling operation by the handpiece 100. Is formed. At this time, the electric current value detected by the measurement tap 200 by the torque sensor 110 provided in the handpiece 100 is converted into a torque value and calculated.

At this time, the size of the diameter of the measurement tab 200 provided in the handpiece 100 is formed to exceed the primary drill diameter to form the initial insertion groove 20 and less than the final drill diameter for implanting the fixture. Through this, bone density is determined using the torque value measured by the measuring tap 200, and the diameter size of the final drill for implanting the fixture is selected in consideration of the determined bone density value.

On the other hand, Figure 8 is a block diagram showing a bone density measurement method for an implant according to another embodiment of the present invention.

As shown in Figure 8, the bone density measurement method for an implant according to another embodiment of the present invention is implanted in the alveolar bone (10) during orthodontic fixture used as a fixed source, and the implantation groove for implanting the fixture ( In the implant treatment method for orthodontic teeth by the handpiece 100 provided with a drill forming 20, first, the fixture to be implanted in the implantation groove 20 is selected.

When the fixture is selected, the drilling operation for forming the insertion groove 20 is performed. At this time, the drilling operation is carried out by the measuring drill 300, the thread 30 is formed when the implantation groove 20 is formed in the alveolar bone 10 by the drilling operation.

Here, the electrical measurement value generated when the thread 30 is formed by using the vertical force sensor 120 provided in the handpiece 100 is detected. Through this, bone density information of the alveolar bone 10 is calculated using the detected electrical measurement value. Here, the electrical measurement value according to another embodiment of the present invention means a vertical force value.

On the other hand, the handpiece 100 is provided with a vertical force sensor 120 for detecting the vertical force which is an electrical measurement generated when the thread 30 is formed in the insertion groove 20 by the measuring drill 300 is provided. do. Through this, the vertical force generated when the thread 30 is formed by the vertical force sensor 120 is detected, the detected vertical force is the alveolar bone in which the insertion groove 20 is formed through calculating the bone density information ( Bone density value of 10) is determined.

Therefore, when the bone density value of the alveolar bone 10 is determined, the size of the final drill diameter corresponding to the bone density value is determined, and a fixture is inserted into the insertion groove 20 of the alveolar bone 10 by the final drilling operation. It is planted.

9 is a flowchart illustrating the step of calculating the bone density information of the bone density measurement method for implants according to another embodiment of the present invention.

As shown in FIG. 9, the calculating of the bone density information may include calculating a vertical force sample value from the calculated vertical force values (S1) and comparing the magnitude of the calculated vertical force sample value with a preset comparison value. And determining the bone density value (S2).

Here, the calculating of the vertical force sample values (S1) may be performed by accumulating the vertical force value for each unit time from the initial drilling time of the insertion groove 20 to the final drilling time corresponding to the end of the insertion groove 20. Or, it may be calculated by accumulating and integrating the vertical force value per unit depth from the initial drilling point of the implantation groove 20 to the final drilling point corresponding to the end of the implantation groove 20.

In addition, the vertical force value L is calculated by multiplying the proportional constant α by the vertical force F, which is an electrical measurement value measured per unit time when the thread 30 is formed in the measuring drill 300. At this time, the proportional constant (α) is a constant value derived by the result of the clinical experiment.

In addition, the step of determining the bone density value (S2) includes the step of determining the bone density of the normal force sample value is less than the first set value as a soft bone (S3), and when the value is greater than or equal to the first set value and less than or equal to the second set value, the normal bone is determined. And a step S5 of determining the bone mineral density exceeding the second set value as a hard bone (S5).

Here, the first setpoint and the second setpoint are preferably preset values derived from clinical experimental results.

10A and 10B illustrate a vertical force-time diagram and a vertical force-depth diagram of a method for measuring bone density for an implant according to another embodiment of the present invention.

As shown in Figure 10a, the vertical force-time plot of the bone density measurement method for implants of the present invention is a time value per unit time is arranged on the horizontal axis, the vertical force value is arranged on the vertical axis.

Here, the vertical force-time diagram corresponds to the end portion of the insertion groove 20 from the initial time vertical force value point of the measurement drill 300 inserted into the insertion groove 20 to the vertical force value per unit time point It is formed as a linear continuous curve up to the point of the final time normal force value.

In this case, the vertical force values calculated per unit time are represented by respective points on the horizontal axis and the vertical axis, and one point and the other point adjacent to each other are connected by a straight line perpendicular to the horizontal axis to form one closed curve. Through this, the area value of the closed curve is calculated, and the sum of the total area where the closed curve area from the origin to the right final point is accumulated is calculated by integration.

The sum of the total accumulated areas of each closed curve area is compared with a comparison value preset in the determination step of the bone density value. Through this, the bone density value is determined as the soft bone, the normal bone, and the hard bone by comparing the first set value with the second set value. Here, the first setpoint and the second setpoint are preferably preset values derived by the results of clinical trials.

On the other hand, as shown in Figure 10b, the vertical force-depth diagram of the implant bone density measurement method of the present invention is a depth value per unit time is arranged on the horizontal axis, the vertical force value is arranged on the vertical axis.

Here, the vertical force-depth curve corresponds to the end portion of the insertion groove 20 from the initial depth of the vertical force value point of the measurement drill 300 inserted into the insertion groove 20 to the vertical force value per unit depth It is formed as a linear continuous curve up to the final depth of vertical force value.

On the other hand, the handpiece 100 is provided with a depth sensor 130, the vertical force sensor 120 by using the depth sensor 130, the formation of the screw thread 30 by the measurement drill 300 The vertical force value, an electrical measurement measured per unit depth of time, is calculated.

The vertical force values calculated per unit depth are represented by respective points on the horizontal axis and the vertical axis, and one point and the other point adjacent to each other are connected by a straight line perpendicular to the horizontal axis to form a closed curve. Through this, the area value of the closed curve is calculated, and the sum of the total area where the closed curve area from the origin to the right final point is accumulated is calculated by integration.

Here, the sum of the total area accumulated in each closed curve area is compared with the comparison value preset in the determination step of the bone density value, and the bone density value is determined by the soft bone, the normal bone, and the hard bone. In this case, the predetermined comparison value is preferably the first set value and the second set value.

The vertical force-time diagram and the vertical force-depth diagram are similar to the torque-time diagram and the torque-depth diagram, and the vertical force value increases rapidly at the beginning according to the hardness of the alveolar bone and jawbone of the human body, and then descends after the peak. At the point, it consists of a smooth continuous curve.

Here, the vertical force-time diagram and the vertical force-depth diagram may form a horizontal line in which the initial vertical force value and the final vertical force value are formed to constant values. Of course, the curved shape of the vertical force value per unit time or per unit depth may be formed in various forms, and these various forms correspond to other embodiments of the present invention.

Figure 11 shows the maximum vertical force-time diagram and the maximum vertical force-depth diagram of the implant bone density measurement method according to another embodiment of the present invention.

As shown in Figure 11, the maximum vertical force-time plot of the bone density measurement method for implants of the present invention is time is arranged on the horizontal axis, the maximum vertical force value is arranged on the vertical axis.

Here, the vertical force sensor 120 calculates the electrical maximum measured value generated in the screw thread 30 formed in the insertion groove 20 by the measuring drill 300 as the maximum vertical force value.

The maximum vertical force-time plot is linear from the initial time vertical force value point of the measurement drill 300 inserted into the insertion groove 20 to the final time vertical force value point corresponding to the end of the insertion groove 20. Form a continuous curve. At this time, the bone density value is determined by comparing the maximum vertical force value formed in the curve with a predetermined comparison value.

In detail, the calculating of the bone density information may include comparing the calculated maximum vertical force value with a predetermined comparison value to determine a bone density less than a first set value as a soft bone, and when the value is greater than or equal to the first set value and less than or equal to the second set value, And determining the bone density value as the hard bone of the bone density exceeding the second set value.

On the other hand, the handpiece 100 is provided with a depth sensor 130, the vertical force sensor 120 by using the depth sensor 130, the formation of the screw thread 30 by the measurement drill 300 The electrical maximum measured value of the total depth of the test is calculated as the maximum vertical force value.

Here, the maximum vertical force-depth diagram corresponds to the end portion of the insertion groove 20 from the initial depth of the vertical force value point of the measurement drill 300 inserted into the insertion groove 20 to the vertical force value of the total depth It is formed into a linear continuous curve up to the final depth of vertical force.

At this time, the bone mineral density value is determined by comparing the maximum vertical force value with the preset comparison value in the maximum vertical force-depth curve, and the determination process is performed in the same way as the maximum vertical force-time diagram.

12 is an exemplary view showing the attachment position of the depth sensor and the vertical force sensor of the handpiece for implants according to another embodiment of the present invention.

As shown in FIG. 12, the handpiece 100 according to another embodiment of the present invention calculates an electrical measurement value measured when inserted into the insertion groove 20 in the measurement drill 300 as a vertical force value. The vertical load sensor 120 is provided above the drill mounting portion of the handpiece (100). In addition, the side of the handpiece 100 is provided with a depth sensor 130 to measure the depth of the measurement drill 300 is inserted into the insertion groove (20). Through this, the bone density information of the alveolar bone can be obtained, thereby enabling a safer and more accurate implant procedure.

As described above, the method for measuring bone density of an implant according to a preferred embodiment of the present invention is not limited to each of the above-described embodiments, and the general knowledge in the technical field to which the present invention belongs without departing from the scope of the present invention. It is possible to carry out modification by the exciter, and such modifications are within the scope of the present invention.

1 is a block diagram showing a bone density measurement method for an implant according to an embodiment of the present invention.

Figure 2 is a flow chart showing the step of calculating the bone density information of the bone density measurement method for implants according to an embodiment of the present invention.

3A and 3B are a torque-time diagram and a torque-depth diagram of a method for measuring bone density for an implant according to an embodiment of the present invention.

Figure 4 is an exemplary view showing the data detected by the torque-depth diagram of the bone density measurement method for implants according to an embodiment of the present invention.

5 is a torque-time diagram and a torque-depth diagram for determining a bone density value through slope values per unit time and per unit depth according to an embodiment of the present invention.

Figure 6 is the maximum torque-time diagram and the maximum torque-depth diagram of the bone density measurement method for implants according to an embodiment of the present invention.

Figure 7 is a state diagram showing the operating state of the measuring tap is inserted into the insertion groove according to an embodiment of the present invention.

Figure 8 is a block diagram showing a bone density measurement method for implants according to another embodiment of the present invention.

Figure 9 is a flow chart showing the step of calculating the bone density information of the bone density measurement method for implants according to another embodiment of the present invention.

10A and 10B are vertical force-time diagram and vertical force-depth diagram of a method for measuring bone density of an implant according to another embodiment of the present invention.

Figure 11 is the maximum vertical force-time diagram and the maximum vertical force-depth diagram of the bone density measurement method for implants according to another embodiment of the present invention.

Figure 12 is an exemplary view showing the attachment position of the depth sensor and the vertical force sensor of the handpiece for implants according to another embodiment of the present invention.

<Description of the symbols for the main parts of the drawings>

10: Alveolar bone 20: Placement groove

30: Thread 100: Handpiece

110: torque sensor 120: vertical force sensor

130: depth sensor 200: measuring tap

300: measuring drill

Claims (18)

In the bone density measurement method for implants to orthodontic the teeth by a handpiece provided in the alveolar bone is used as a fixed source and a drill for forming the implantation groove for implanting the fixture, Inserting a measurement tab provided in the handpiece during drilling to form the insertion groove; Forming a screw thread in the insertion groove by the measuring tab; Calculating a torque value from electrical measurements generated when the thread is formed by using a torque sensor provided in the handpiece; And Bone density measurement method comprising the step of calculating the bone density information through the detected torque value. The method of claim 1, Computing the bone density information Calculating a torque sample value based on the detected torque value; And a bone density value is determined by comparing the calculated torque sample value with a preset comparison value. The method of claim 2, The step of calculating the torque sample value The measured torque values are inserted into the insertion grooves, and the torque values are accumulated by summing the torque values for each unit time from an initial time point at which the torque value is measured to a final time point corresponding to an end of the insertion groove. Bone density measurement method for an implant, characterized in that comprises a step of calculating. The method of claim 2, The step of calculating the torque sample value Torque sample value is obtained by accumulating and summing the torque values per unit depth from the first point where the measured tap is inserted into the insertion groove to measure the torque value to the final point corresponding to the end of the insertion groove. Bone density measurement method for an implant, characterized in that comprises a step of calculating the. The method of claim 2, The step of calculating the torque sample value is a torque sample value of the maximum torque measured at the time of tapping from the initial time point at which the torque value is measured by inserting the measurement tab into the insertion groove to the final time point corresponding to the end of the insertion groove. Bone density measurement method for an implant, characterized in that comprises a step of calculating to. The method of claim 2, Determining the bone density value Determining the bone density below the first set value, wherein the magnitude of the torque sample value is a predetermined comparison value, as a soft bone; Discriminating a normal bone when the value is greater than the first set value and less than the second set value; and And measuring the bone density exceeding the second set value as a hard bone. The method of claim 1, The torque sensor calculates the torque value by converting the electrical resistance value generated in the thread by the measuring tap into a torque value, and the proportional constant is proportional to the electrical measured value measured per unit time when the thread is formed in the measuring tap. Bone density measurement method for an implant, characterized in that comprises the step of multiplying the torque value. The method of claim 1, The diameter of the measuring tap provided in the handpiece exceeds the primary drill diameter to form the initial insertion groove, the bone density measurement method for an implant, characterized in that less than the final drill diameter for implantation of the fixture. The method of claim 1, The torque sensor calculates an electrical resistance value measured per unit time when the thread is formed by the measuring tap as a torque value, The calculating of the bone density information may include determining the bone density value by comparing the inclination value of the torque diagram which the calculated torque values are formed for each unit time with a preset comparison value, wherein the bone density measurement for the implant is performed. Way. The method of claim 1, The handpiece is provided with a depth sensor, the torque sensor is an implant, characterized in that to calculate the electrical resistance value measured per unit depth when forming the thread by the measuring tap using the depth sensor as a torque value Method for measuring bone density for dragon. In the bone density measurement method for implants to orthodontic the teeth by a handpiece provided in the alveolar bone is used as a fixed source and a drill for forming the implantation groove for implanting the fixture, Forming a thread in the insertion groove by the measuring drill during the drilling operation for forming the insertion groove; Calculating a vertical force value from electrical measurements generated when the thread is formed by using a vertical force sensor provided in the handpiece; And Bone density measurement method comprising the step of calculating the bone density information through the detected vertical force value. The method of claim 11, Computing the bone density information Calculating a vertical force sample value based on the calculated vertical force values; And determining a bone density value by comparing the calculated vertical force sample value with a predetermined comparison value. The method of claim 12, The step of calculating the vertical force sample value The measured vertical force values are inserted into the insertion groove, and the vertical force value is accumulated by summing up the vertical force value for each unit depth from the first point at which the vertical force value is measured to the final point corresponding to the end of the insertion groove. Bone density measurement method for an implant, characterized in that comprises a step of calculating the. The method of claim 12, The step of calculating the vertical force sample value The measured vertical force values are inserted into the insertion groove, and the vertical force value is accumulated by summing up the vertical force values for each unit time from the initial time point at which the vertical force value is measured to the final time point corresponding to the end of the insertion groove. Bone density measurement method for an implant, characterized in that comprises a step of calculating. The method of claim 12, The step of calculating the vertical force sample value is a vertical force sample of the maximum vertical force value measured at the time of tapping from the initial point of time when the torque is measured by inserting the measurement drill into the insertion groove from the final point corresponding to the end of the insertion groove. Bone density measurement method for an implant, characterized in that comprises a step of calculating the value. The method of claim 12, Determining the bone density value Determining the bone density below the first set value, wherein the magnitude of the perpendicular force sample value is the predetermined comparison value, as a soft bone; Discriminating a normal bone when the value is greater than the first set value and less than the second set value; and And measuring the bone density exceeding the second set value as a hard bone. The method of claim 11, The vertical force sensor calculates the vertical force value from the electrical resistance generated in the screw thread by the measuring drill, and calculates the vertical force value by multiplying the proportional constant by the electrical measurement value measured per unit time when the screw thread is formed in the measuring drill. Bone density measurement method for an implant, characterized in that comprises a step that is made. The method of claim 11, The handpiece is provided with a depth sensor, the vertical force sensor for implants, characterized in that for calculating the electrical measurement value per unit depth when forming the thread by the measuring drill using the depth sensor as a vertical force value Bone density measurement method.

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