Root canal inner diameter precision measuring scale

Abstract

The invention provides a root canal inner diameter precision measuring scale, which comprises an outer rod, an inner rod and a measuring needle, a cavity is arranged in the outer rod, the inner rod is in sliding fit with the cavity, the measuring needle comprises an integrated part and a bifurcate part connected to one end of the integrated part, the bifurcate part comprises two measuring arms which are symmetrically arranged, an adjusting gap is arranged between the two measuring arms, and the adjusting gap is matched with the integrated part. The size of the adjusting notch in the symmetrical direction of the two measuring arms is linearly increased progressively from the end, close to the integrated part, of the adjusting opening to the end, away from the integrated part, of the adjusting opening, the inner rod movably sleeves the measuring needle, an adjusting column matched with the adjusting notch is fixed in the inner rod, an adjusting block is fixed to the outer wall of the inner rod, and a guide hole matched with the adjusting block is formed in the outer rod. The outer rod is rotationally sleeved with an adjusting sleeve, the adjusting sleeve is in threaded fit with the adjusting block, and the outer rod is provided with a visual window and scales. The internal diameter of the root canal can be accurately measured, measurement data can be obtained at a time in a mechanical measurement mode, cost is low, and radiation is avoided.

Description

Technical Field

[0001] The invention relates to the technical field of medical instruments, in particular to a precision measuring ruler for the inner diameter of a root canal. Background Art

[0002] Currently, most root canal internal diameter data is derived from in vitro measurements of isolated teeth, which cannot meet the clinical needs of treating complex root canal systems. Accurately measuring the internal diameter of the root canal can help doctors select appropriate root canal instruments, reduce risks during root canal treatment, such as overexpansion or damage to the root canal wall, and improve treatment success rates.

[0003] Currently, there are the following ways to obtain the inner diameter of the root canal during clinical treatment: 1. X-rays: X-rays can help show the shape and approximate diameter of the root canal. Disadvantages: X-rays can only be used as a tool for preliminary evaluation and cannot provide accurate diameter measurements. 2. Root canal files or root canal expanders: During the root canal cleaning and shaping process, dentists can use root canal files or root canal expanders of different diameters to determine the width of the root canal. Disadvantages: By gradually inserting root canal files or root canal expanders of different diameters to find the size that best suits the root canal, the data cannot be obtained in one go. 3. Three-dimensional imaging technology: such as CBCT (cone beam computed tomography), which can be used to accurately measure the diameter and shape of the root canal. Disadvantages: The cost is relatively high, the radiation dose is relatively high compared to X-rays, and it is impossible to achieve multiple immediate measurements under visual observation during treatment.

[0004] Therefore, it is necessary to design a precise measuring ruler for the inner diameter of the root canal to solve the above technical problems. Summary of the Invention

[0005] In order to solve the problems existing in the above-mentioned prior art, the present invention provides a root canal inner diameter precision measuring ruler, which can achieve relatively accurate measurement of the root canal inner diameter, adopts a mechanical measurement method, obtains measurement data in one time, is simple to operate, low in cost, and has no radiation.

[0006] To achieve the above-mentioned purpose, the present invention is implemented through the following technical solutions:

[0007] A precision measuring ruler for the inner diameter of a root canal comprises an outer rod, an inner rod and a measuring needle, wherein the outer rod is provided with a cavity therein, the cavity extending axially along the outer rod, the inner rod slidably engaging with the cavity, the measuring needle comprising an integral portion and a bifurcated portion connected to one end of the integral portion, the bifurcated portion comprising two symmetrically arranged measuring arms, the end of the integral portion remote from the bifurcated portion being fixedly connected to the outer rod, the bifurcated portion extending to the outside of the outer rod, an adjustment notch being provided between the two measuring arms, the size of the adjustment notch in the symmetrical direction of the two measuring arms increasing linearly from the end of the adjustment opening close to the integral portion to the end remote from the integral portion, the inner rod movably sleeved on the measuring needle, an adjustment column fixed within the inner rod engaging with the adjustment notch, an adjustment block fixed to an outer wall of the inner rod, a guide hole provided on the outer rod engaging with the adjustment block, an adjustment sleeve rotatably sleeved on the outer rod, the adjustment sleeve threadably engaging with the adjustment block, and a viewing window and a scale provided on the outer rod.

[0008] Preferably, when the adjustment column is located at the end of the adjustment notch away from the integral portion, the two measuring arms fit together.

[0009] Preferably, the inner rod is provided with a through hole which passes through the inner rod along the sliding direction of the inner rod, one end of the through hole is slidably connected to the integral part, and the aperture of the through hole gradually increases from the end slidably connected to the integral part to the other end.

[0010] Preferably, the cross section of the integral portion is circular; when the two measuring arms are fitted together, the outer edge contour of the cross section of the bifurcated portion is circular.

[0011] Preferably, one end of the outer rod is connected to a fixing head via a screw, one end of the integral part away from the bifurcated part is provided with an external thread, and the integral part is threadedly connected to the fixing head.

[0012] Preferably, the end of the bifurcated portion located outside the outer rod is provided with a first bending segment and a second bending segment with opposite bending directions and connected to each other, the first bending segment is away from the outer rod, and the cross-sectional size of the first bending segment increases linearly from the end point of the bifurcated portion to the connection between the first bending segment and the second bending segment.

[0013] Preferably, when the two measuring arms are in contact with each other, the cross-sectional radius of the first bending section increases linearly from 0.2 mm to 2 mm.

[0014] Preferably, the outer wall of the outer rod is provided with a groove arranged along the circumference of the outer rod, and the adjustment sleeve is rotatably arranged in the groove.

[0015] Preferably, the outer wall of the adjustment sleeve is provided with anti-slip grooves.

[0016] Compared with the prior art, the beneficial effects of the present invention are:

[0017] The root canal inner diameter precision measuring ruler of the present invention can realize relatively accurate measurement of the root canal inner diameter, adopts a mechanical measurement method, obtains measurement data at one time, is simple to operate, low in cost, and has no radiation. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a front structural schematic diagram of the root canal inner diameter precision measuring ruler of the present invention;

[0019] Figure 2 Schematic diagram of the top view of the root canal inner diameter precision measuring ruler of the present invention;

[0020] Figure 3 Schematic diagram of the top view of the root canal inner diameter precision measuring ruler of the present invention (without the adjustment sleeve);

[0021] Figure 4 It is a schematic diagram of the cross-sectional structure of the root canal inner diameter precision measuring ruler of the present invention.

[0022] Description of Reference Numerals

[0023] 1-outer rod, 2-inner rod, 3-cavity, 4-integral part, 5-bifurcated part, 6-measuring arm, 7-adjustment notch, 8-adjustment column, 9-adjustment block, 10-guide hole, 11-adjustment sleeve, 12-visual window and scale, 13-screw, 14-fixing head, 15-first bending section, 16-second bending section, 17-groove. DETAILED DESCRIPTION

[0024] Below in conjunction with specific embodiment, further set forth the present invention.Should be understood that these embodiments are only used to illustrate the present invention and are not used in limiting the scope of the present invention.In addition, should be understood that after reading the content taught by the present invention, those skilled in the art can make various changes or modifications to the present invention, and these equivalent forms fall within the scope limited by the application equally.

[0025] like Figures 1 to 4As shown, a root canal inner diameter precision measuring ruler includes an outer rod 1, an inner rod 2 and a measuring needle. A cavity 3 is provided inside the outer rod 1, and the cavity 3 extends axially along the outer rod 1. The inner rod 2 slides in cooperation with the cavity 3. The measuring needle includes an integral part 4 and a bifurcated part 5 connected to one end of the integral part 4. The bifurcated part 5 includes two symmetrically arranged measuring arms 6. One end of the integral part 4 away from the bifurcated part 5 is fixedly connected to the outer rod 1. The bifurcated part 5 extends to the outside of the outer rod 1. An adjustment notch 7 is provided between the two measuring arms 6. The size of the adjustment notch 7 in the symmetrical direction of the two measuring arms 6 increases linearly from the end of the adjustment port close to the integral part 4 to the end away from the integral part 4. The inner rod 2 is movably sleeved on the measuring needle. An adjustment column 8 that cooperates with the adjustment notch 7 is fixed inside the inner rod 2. An adjustment block 9 is fixed to the outer wall of the inner rod 2. A guide hole 10 that cooperates with the adjustment block 9 is provided on the outer rod 1. An adjustment sleeve 11 is rotatably sleeved on the outer rod 1. The adjustment sleeve 11 is threadedly engaged with the adjustment block 9. A visual window and a scale 12 are provided on the outer rod 1.

[0026] The root canal inner diameter precision measuring ruler of this embodiment needs to be used in conjunction with a dental surgical microscope. During use, under the display of a dental surgical microscope, the bifurcated portion 5 of the measuring needle is inserted into the root canal, so that the end of the bifurcated portion 5 is located at the target measurement section. The adjusting sleeve 11 is rotated. The threaded engagement of the adjusting sleeve 11 and the adjusting block 9 drives the inner rod 2 to move axially, while the adjusting column 8 moves within the adjusting notch 7. Since the size of the adjusting notch 7 changes linearly, the bifurcated portion 5 is pushed open by the adjusting column 8 until the ends of the two measuring arms 6 separate to the inner wall of the root canal. The rotation of the adjusting sleeve 11 is then stopped. At this time, the root canal inner diameter value is read based on the visual window and scale on the outer rod 1, as well as the position of the inner rod 2 end in the visual window, completing the measurement. The root canal inner diameter precision measuring ruler of this embodiment can achieve relatively accurate measurement of the root canal inner diameter. It uses a mechanical measurement method to obtain measurement data in one go, is simple to operate, low cost, and is radiation-free.

[0027] In some optional embodiments, when the adjusting column 8 is located at the end of the adjusting notch 7 away from the integral portion 4 , the two measuring arms 6 fit together, and the bifurcated portion 5 is completely closed.

[0028] In some optional embodiments, the inner rod 2 is provided with a through hole that passes through the inner rod 2 along the sliding direction of the inner rod 2, one end of the through hole is slidingly connected to the integral part 4, and the aperture of the through hole gradually increases from one end slidingly connected to the integral part 4 to the other end, providing space for the bifurcation of the bifurcated part 5.

[0029] In some optional embodiments, the cross-section of the integral portion 4 is circular; when the two measuring arms 6 are fitted together, the outer edge contour of the cross-section of the bifurcated portion 5 is circular.

[0030] In some optional embodiments, one end of the outer rod 1 is connected to a fixed head 14 via a screw 13, and the end of the integral part 4 away from the bifurcated part 5 is provided with an external thread, and the integral part 4 is threadedly connected to the fixed head 14 to fix the measuring needle.

[0031] In some optional embodiments, the end of the bifurcated portion 5 located outside the outer rod 1 is provided with a first bending section 15 and a second bending section 16 with opposite bending directions and connected to each other. The first bending section 15 is away from the outer rod 1, and the cross-sectional dimensions of the first bending section 15 increase linearly from the end point of the bifurcated portion 5 to the connection between the first bending section 15 and the second bending section 16. By providing the bending section, it is easier for the measuring needle to enter the root canal and for the physician to operate. The cross-sectional dimensions of the first bending section 15 increase linearly from the end point of the bifurcated portion 5 to the connection between the first bending section 15 and the second bending section 16, which can make the end point size of the bifurcated portion 5 used for measurement sufficiently small while making the remaining parts of appropriate size to ensure the strength of the measuring needle. Preferably, when the two measuring arms 6 are in contact, the cross-sectional radius of the first bending section 15 increases linearly from 0.2 mm to 2 mm.

[0032] In some optional embodiments, the outer wall of the outer rod 1 is provided with a groove 17 arranged along the circumference of the outer rod 1 , and the adjustment sleeve 11 is rotatably arranged in the groove 17 .

[0033] In some optional embodiments, the outer wall of the adjustment sleeve 11 is provided with anti-slip grooves to prevent slipping and facilitate operation.

[0034] The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention are intended to be within the scope of protection of the present invention.

Claims

1. A precision measuring ruler for the inner diameter of a root canal, characterized in that: The invention comprises an outer rod (1), an inner rod (2) and a measuring needle, wherein a cavity (3) is provided inside the outer rod (1), the cavity (3) extends axially along the outer rod (1), the inner rod (2) and the cavity (3) are slidably matched, the measuring needle comprises an integral part (4) and a bifurcated part (5) connected to one end of the integral part (4), the bifurcated part (5) comprises two symmetrically arranged measuring arms (6), one end of the integral part (4) away from the bifurcated part (5) is fixedly connected to the outer rod (1), the bifurcated part (5) extends to the outside of the outer rod (1), an adjustment notch (7) is provided between the two measuring arms (6), and the adjustment notch (7) is provided between the two measuring arms (6). ) The dimensions of the two measuring arms (6) in the symmetrical direction increase linearly from the end of the adjusting port close to the integral part (4) to the end away from the integral part (4); the inner rod (2) is movably sleeved on the measuring needle; an adjusting column (8) matching the adjusting notch (7) is fixed inside the inner rod (2); an adjusting block (9) is fixed on the outer wall of the inner rod (2); a guide hole (10) matching the adjusting block (9) is provided on the outer rod (1); an adjusting sleeve (11) is rotatably sleeved on the outer rod (1); the adjusting sleeve (11) is threadedly matched with the adjusting block (9); and a visual window and a scale (12) are provided on the outer rod (1).

2. A root canal inner diameter precision measuring ruler according to claim 1, characterized in that: When the adjustment column (8) is located at an end of the adjustment notch (7) away from the integral portion (4), the two measuring arms (6) fit together.

3. The root canal inner diameter precision measuring ruler according to claim 1, characterized in that: The inner rod (2) is provided with a through hole penetrating the inner rod (2) along the sliding direction of the inner rod (2), one end of the through hole is slidably connected to the integral part (4), and the aperture of the through hole gradually increases from the end slidably connected to the integral part (4) to the other end.

4. A root canal inner diameter precision measuring ruler according to claim 2, characterized in that: The cross section of the integral portion (4) is circular; when the two measuring arms (6) are fitted together, the outer edge profile of the cross section of the bifurcated portion (5) is circular.

5. A root canal inner diameter precision measuring ruler according to claim 4, characterized in that: One end of the outer rod (1) is connected to a fixed head (14) via a screw (13); one end of the integral part (4) away from the bifurcated part (5) is provided with an external thread; the integral part (4) is threadedly connected to the fixed head (14).

6. The root canal inner diameter precision measuring ruler according to claim 4, characterized in that: The end of the bifurcated portion (5) located outside the outer rod (1) is provided with a first bending section (15) and a second bending section (16) with opposite bending directions and connected to each other, the first bending section (15) being away from the outer rod (1), and the cross-sectional size of the first bending section (15) linearly increasing from the end point of the bifurcated portion (5) to the connection point between the first bending section (15) and the second bending section (16).

7. The root canal inner diameter precision measuring ruler according to claim 6, characterized in that: When the two measuring arms (6) are fitted together, the cross-sectional radius of the first bending section (15) increases linearly from 0.2 mm to 2 mm.

8. The root canal inner diameter precision measuring ruler according to claim 1, characterized in that: The outer wall of the outer rod (1) is provided with a groove (17) arranged along the circumference of the outer rod (1), and the adjustment sleeve (11) is rotatably arranged in the groove (17).

9. The root canal inner diameter precision measuring ruler according to claim 1, characterized in that: The outer wall of the adjustment sleeve (11) is provided with anti-slip grooves.

Images