Adjustable apicoectomy surgical guide based on cone beam ct measurements

Abstract

The application provides an adjustable apical surgery guide based on cone beam CT measurement, which comprises a first positioning pile, a second positioning pile, a transverse guide rod, a first longitudinal member and a second longitudinal member. According to the reference point and the reference straight line measured in the cone beam CT image, the actual surgery drilling point and the drilling direction of the drill bit are determined by the adjustable apical surgery guide based on cone beam CT measurement, the correspondence between the image and the actual working condition is realized, and the accurate implementation of the apical surgery is ensured.

Description

TECHNICAL FIELD

[0001] The application relates to a root surgery guide plate, in particular to an adjustable root surgery guide plate based on cone beam CT measurement. BACKGROUND

[0002] When performing root surgery, cone beam CT measurement design is first performed. In the CT image, the drilling point and the drilling angle of the bone surface can be planned. However, the root surgery is operated on the actual bone surface, not in the CT image. There is difficulty in matching the drilling point and the drilling angle planned in the CT image with the actual bone surface. SUMMARY

[0003] In view of the above problems, the application aims to provide an adjustable root surgery guide plate based on cone beam CT measurement, which can help match the CT image with the bone surface of the subject, and help the drilling point and the drilling angle of the bone surface planned in the CT image to be accurately implemented on the actual bone surface of the subject.

[0004] The application provides an adjustable root surgery guide plate based on cone beam CT measurement, which comprises a first positioning stake, a second positioning stake, a transverse guide rod, a first longitudinal member and a second longitudinal member.

[0005] The first positioning stake and the second positioning stake are fixed on the teeth of the subject before cone beam CT shooting, and are respectively located on both sides of the tooth root to be operated; the transverse guide rod is detachably installed between the first positioning stake and the second positioning stake; the center point of the first positioning stake serves as a first reference point in the cone beam CT image, and the center point of the second positioning stake serves as a second reference point in the cone beam CT image; a reference straight line is formed by connecting the first reference point and the second reference point; the axis of the transverse guide rod is located on the reference straight line.

[0006] The first longitudinal member is used for determining the position of the actual drilling point on the bone surface of the subject to be operated; the upper end of the first longitudinal member is slidably installed on the transverse guide rod; the lower end of the first longitudinal member is formed with a pointed end pointing to the bone surface; the length of the first longitudinal member is adjustable.

[0007] The determined drilling point in the cone beam CT image is a virtual drilling point; according to the length of the first perpendicular segment between the virtual drilling point and the reference straight line, and the positions of the upper end of the first perpendicular segment relative to the first reference point and the second reference point, the length of the first longitudinal member and the position of the first longitudinal member on the transverse guide rod are adjusted, so that the length between the upper end and the lower end of the first longitudinal member is the same as the length of the first perpendicular segment, and the position of the upper end of the first longitudinal member on the transverse guide rod is the same as the position of the upper end of the first perpendicular segment on the reference straight line, so as to indicate the position of the actual drilling point on the bone surface by the pointed end of the lower end of the first longitudinal member.

[0008] The second longitudinal member is used to determine the drilling direction; the upper end of the second longitudinal member is slidably mounted on the transverse guide rod; the lower end of the second longitudinal member is rotatably mounted with a drilling axis indicating needle in multiple directions; the drilling axis indicating needle is used to indicate the drilling direction of the bone surface; the length of the second longitudinal member is adjustable;

[0009] The drilling point auxiliary point and the drilling axis are designed in the cone beam CT image; the drilling point auxiliary point is on the drilling axis, located outside the bone surface to be operated in the cone beam CT image, and is a predetermined distance from the virtual drilling point;

[0010] According to the length of the second perpendicular segment between the drilling auxiliary point and the reference straight line, the positions of the upper end of the second perpendicular segment relative to the first reference point and the second reference point, the length of the second longitudinal member and the position of the second longitudinal member on the transverse guide rod are adjusted, so that the length between the upper end and the lower end of the second longitudinal member is the same as the length of the second perpendicular segment, the position of the upper end of the second longitudinal member on the transverse guide rod is the same as the position of the upper end of the second perpendicular segment on the reference straight line, and the length of the drilling axis indicating needle of the lower end of the second longitudinal member is adjusted to be equal to the predetermined distance; the tip of the drilling axis indicating needle is in contact with the actual drilling point, and the extension direction of the drilling axis indicating needle is the drilling axis in the cone beam CT image.

[0011] Preferably, the first longitudinal member comprises a first sliding block; a first sliding hole is formed in the center of the first sliding block, and the upper end of the first longitudinal member is slidably mounted on the transverse guide rod through the first sliding hole; a first bolt is mounted on the first sliding block, and the end of the first bolt is inserted into the first sliding hole and abuts against the transverse guide rod to fix the first member;

[0012] A first insertion rod is formed at the lower end of the first sliding block;

[0013] A first insertion cylinder is mounted at the lower end of the first insertion rod, and the lower end of the first insertion rod is inserted into the upper end of the first insertion cylinder; a second bolt is mounted on the first insertion cylinder; the end of the second bolt abuts against the outer peripheral surface of the first insertion rod to fix the first insertion rod in the first insertion cylinder; the length of the first longitudinal member is adjusted by adjusting the depth of the first insertion rod inserted into the first insertion cylinder;

[0014] A C-shaped piece is formed at the lower end of the first insertion cylinder, the upper end of the C-shaped piece is fixed at the lower end of the first insertion cylinder, and the lower end of the C-shaped piece is the lower end of the first longitudinal member;

[0015] The central axes of the first insertion rod and the first insertion cylinder pass through the center of the first sliding hole in the upper part and the lower end of the C-shaped piece in the lower part.

[0016] Preferably, the second longitudinal member comprises a second sliding block; the second sliding block is centrally formed with a second sliding hole, the upper end of the second longitudinal member is slidably mounted on the transverse guide rod via the second sliding hole; a third bolt is mounted on the second sliding block, the end of the third bolt is inserted into the second sliding hole and abuts against the transverse guide rod to fix the second member;

[0017] The lower end of the second sliding block is formed with a second insertion rod;

[0018] A second insertion cylinder is mounted on the lower end of the second insertion rod, the lower end of the second insertion rod is inserted into the upper end of the second insertion cylinder; a fourth bolt is mounted on the second insertion cylinder; the end of the fourth bolt abuts against the outer peripheral surface of the second insertion rod to fix the second insertion rod in the second insertion cylinder; the length of the second longitudinal member is adjusted by adjusting the insertion depth of the second insertion rod into the second insertion cylinder;

[0019] The lower end of the second insertion cylinder is formed with a circular truncated cone, the circular truncated cone is connected with the lower end of the second insertion cylinder via a circular cylinder; the diameter of the circular truncated cone is larger than the diameter of the circular cylinder;

[0020] A rotating cylinder is rotatably mounted on the outer side of the circular truncated cone and the circular cylinder; the circular cylinder extends into the interior of the rotating cylinder, and the circular truncated cone is mounted in the interior of the rotating cylinder; a fifth bolt is formed on the rotating cylinder; the end of the fifth bolt abuts against the outer peripheral surface of the circular cylinder;

[0021] The lower end of the rotating cylinder is integrally formed with a U-shaped member, a needle cylinder is rotatably mounted in the U-shaped gap of the U-shaped member; the two sides of the needle cylinder are formed with sixth screws, one end of the sixth screws extends to the outside of the U-shaped member, and a nut is mounted on the end to fix the rotation angle of the needle cylinder;

[0022] A drill-in axis indicating needle is slidably inserted into the needle cylinder; after the drill-in axis indicating needle is pulled out, the needle cylinder is used to guide the advancing direction of the drill bit.

[0023] By means of the adjustable root tip surgery guide plate based on cone beam CT measurement of the present application, the reference point and the reference straight line measured and designed in the cone beam CT image are used to determine the actual surgery drill-in point and the advancing direction of the drill bit, the correspondence between the image and the actual working condition is realized, and the accurate implementation of the root tip surgery is ensured. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 FIG. 1 is a structural schematic view of the adjustable root tip surgery guide plate based on cone beam CT measurement of the present application;

[0025] Figure 2 FIG. 2 is a front structural schematic view of the first longitudinal member of the adjustable root tip surgery guide plate based on cone beam CT measurement of the present application;

[0026] Figure 3Side view cross-sectional structure diagram of the first longitudinal member of the adjustable apical surgery guide based on cone beam CT measurement of the present application;

[0027] Figure 4 Front view structure diagram of the second longitudinal member of the adjustable apical surgery guide based on cone beam CT measurement of the present application;

[0028] Figure 5 Side view cross-sectional structure diagram of the second longitudinal member of the adjustable apical surgery guide based on cone beam CT measurement of the present application;

[0029] Figure 6 Combination diagram of the needle cylinder of the second longitudinal member of the adjustable apical surgery guide based on cone beam CT measurement of the present application and the drill-in axis indicating needle;

[0030] Figure 7 Diagram of the adjustable apical surgery guide based on cone beam CT measurement of the present application installed on the teeth of a subject to determine the actual drill-in point C;

[0031] Figure 8 Diagram of the adjustable apical surgery guide based on cone beam CT measurement of the present application moving the first longitudinal member after determining the actual drill-in point C;

[0032] Figure 9 Diagram of the adjustable apical surgery guide based on cone beam CT measurement of the present application installed on the teeth of a subject to determine the drill-in axis. DETAILED DESCRIPTION

[0033] Hereinafter, the adjustable apical surgery guide based on cone beam CT measurement of the present application will be described in detail in conjunction with the accompanying drawings.

[0034] The present application proposes an adjustable apical surgery guide based on cone beam CT measurement, which comprises a first positioning pile A, a second positioning pile B, a transverse guide rod AB, a first longitudinal member 10, and a second longitudinal member 20.

[0035] The first positioning pile A and the second positioning pile B are fixed on the teeth of a subject before cone beam CT measurement, and are respectively located on both sides of the tooth root to be operated.

[0036] The transverse guide rod AB is detachably installed between the first positioning pile A and the second positioning pile B, so that the transverse guide rod AB can be installed after CT measurement.

[0037] The center point of the first positioning pile A serves as a first reference point in the cone beam CT image, and the center point of the second positioning pile B serves as a second reference point in the cone beam CT image.

[0038] A reference straight line is formed by connecting the first reference point and the second reference point. The axis of the transverse guide rod AB coincides with the reference straight line.

[0039] The first longitudinal member 10 is used to determine the position of the actual drilling point C on the surface of the subject's bone.

[0040] The upper end of the first longitudinal member 10 is slidably mounted on the transverse guide rod AB; the lower end of the first longitudinal member 10 forms a pointed end 14a pointing to the bone surface; the length of the first longitudinal member 10 is adjustable. The first longitudinal member 10 can be provided with a scale to display the length. The length of the first longitudinal member 10 can also be measured by an external ruler.

[0041] Specifically, as shown in Figure 2 、 3 , the first longitudinal member 10 includes a first sliding block 11; the center of the first sliding block 11 is formed with a first sliding hole 11b, and the upper end of the first longitudinal member 10 is slidably mounted on the transverse guide rod AB via the first sliding hole 11b. A first bolt 11a is mounted on the first sliding block 11, the end of the first bolt 11a is inserted into the first sliding hole 11b and abuts against the transverse guide rod AB to fix the first member 10 on the transverse guide rod AB;

[0042] The lower end of the first sliding block 11 is formed with a first insertion rod 12.

[0043] The lower end of the first insertion rod 12 is mounted with a first insertion cylinder 13.

[0044] The lower end of the first insertion rod 12 is inserted into the upper end of the first insertion cylinder 12; the second bolt 13a is mounted on the first insertion cylinder 13; the end of the second bolt 13a abuts against the outer peripheral surface of the first insertion rod 12 to fix the first insertion rod 12 in the first insertion cylinder 13; the length of the first longitudinal member 10 is adjusted by adjusting the depth of the first insertion rod 12 inserted into the first insertion cylinder 13.

[0045] The lower end of the first insertion cylinder 13 is formed with a C-shaped piece 14, the upper end of the C-shaped piece 14 is fixed to the lower end of the first insertion cylinder 13, and the lower end of the C-shaped piece 14 is the lower end 14a of the first longitudinal member 10.

[0046] The central axes of the first insertion rod 12 and the first insertion cylinder 13 pass through the center of the first sliding hole 11b above and the lower end of the C-shaped piece 14 below, as shown in Figure 3 .

[0047] The designed drilling point in the cone-beam CT image is a virtual drilling point. According to the length of the first perpendicular segment between the virtual drilling point and the reference straight line, and the positions of the upper end of the first perpendicular segment relative to the first reference point and the second reference point, the length of the first longitudinal member 10 and the position of the first longitudinal member 10 on the transverse guide rod AB are adjusted, so that the length between the upper end and the lower end of the first longitudinal member 10 is the same as the length of the first perpendicular segment, and the position of the upper end of the first longitudinal member 10 on the transverse guide rod AB is the same as the position of the upper end of the first perpendicular segment on the reference straight line, thereby indicating the position of the actual drilling point C on the bone surface with the tip of the lower end of the first longitudinal member 10, as shown in Figures 7-8

[0048] The second longitudinal member 20 is used to determine the drilling direction, i.e. the drilling axis.

[0049] Specifically, the upper end of the second longitudinal member 20 is slidably mounted on the transverse guide rod AB; the lower end of the second longitudinal member 20 is rotatably mounted with a drilling axis indicating needle 28. The drilling axis indicating needle 28 is used to indicate the direction of drilling the bone surface; the length of the second longitudinal member 20 can be adjusted. The second longitudinal member 20 can have a scale to display the length. The length of the second longitudinal member 20 can also be measured by an external ruler.

[0050] The drilling point auxiliary point and the drilling axis are designed in the cone-beam CT image; the drilling point auxiliary point is on the drilling axis and is located outside the bone surface in the cone-beam CT image at a predetermined distance from the virtual drilling point.

[0051] Specifically, the second longitudinal member 20 includes a second sliding block 21; the second sliding block 21 is formed with a second sliding hole 21b in the center, and the upper end of the second longitudinal member 20 is slidably mounted on the transverse guide rod AB via the second sliding hole 21b; a third bolt 21a is mounted on the second sliding block 21, and the end of the third bolt 21a is inserted into the second sliding hole 21b and abuts against the transverse guide rod AB to fix the second member 20.

[0052] The lower end of the second sliding block 21 is formed with a second insertion rod 22.

[0053] The lower end of the second insertion rod 22 is mounted with a second insertion cylinder 23. The lower end of the second insertion rod 22 is inserted into the upper end of the second insertion cylinder 23; a fourth bolt 23a is mounted on the second insertion cylinder 23; the end of the fourth bolt 23a abuts against the outer peripheral surface of the second insertion rod 22 to fix the second insertion rod 22 in the second insertion cylinder 23; the length of the second longitudinal member 20 is adjusted by adjusting the depth of the second insertion rod 22 inserted into the second insertion cylinder 23.

[0054] ​The lower end of the second insertion cylinder 23 is formed with a circular truncated cone 24a, and the circular truncated cone 24a and the lower end of the second insertion cylinder 23 are connected by a circular cylinder 24; the diameter of the circular truncated cone 24a is larger than the diameter of the circular cylinder 24.

[0055] The outer side of the circular truncated cone 24a and the circular cylinder 24 is rotatably installed with a rotating cylinder 25; the circular cylinder 24 extends into the interior of the rotating cylinder 25, and the circular truncated cone 24a is installed in the interior of the rotating cylinder 25; the rotating cylinder 25 is formed with a fifth screw 25a; the end of the fifth screw 25a abuts against the outer peripheral surface of the circular cylinder 24 to fix the rotation angle of the drill axis indicating needle with the axis of the second member as the rotation axis.

[0056] The lower end of the rotating cylinder 25 is integrally formed with a U-shaped member 26, and the U-shaped member 26 is rotatably installed with a needle cylinder 27 in the U-shaped gap of the U-shaped member 26; the two sides of the needle cylinder 27 are formed with a sixth screw 26b, one end of the sixth screw 26b extends to the outside of the U-shaped member 26, and a nut 26a is installed on the end to fix the rotation angle of the needle cylinder 27 relative to the sixth screw 26b. The extension direction of the sixth screw 26b is perpendicular to the extension direction of the axis of the second member.

[0057] The drill axis indicating needle 28 is slidably inserted in the needle cylinder 27; after the drill axis indicating needle 27 is pulled out, the needle cylinder 27 is used to guide the advancing direction of the drill bit.

[0058] According to the length of the second perpendicular line segment between the drill-in auxiliary point and the reference straight line, the position of the upper end of the second perpendicular line segment relative to the first reference point and the second reference point, the length of the second longitudinal member 20 and the position of the second longitudinal member 20 on the transverse guide rod AB are adjusted, so that the length between the upper end and the lower end of the second longitudinal member 20 is the same as the length of the second perpendicular line segment, the position of the upper end of the second longitudinal member 20 on the transverse guide rod AB is the same as the position of the upper end of the second perpendicular line segment on the reference straight line, and the length of the drill axis indicating needle extending from the lower end of the second longitudinal member 20 is adjusted to be equal to the predetermined distance, the tip of the drill axis indicating needle 28 is in contact with the actual drill-in point C, and the extension direction of the drill axis indicating needle 28 is the drill axis in the cone beam CT image.

[0059] Unless otherwise defined, all technical and / or scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains. The materials, methods, and examples mentioned in this application are illustrative only and not limiting.

[0060] Although the present application has been described in connection with specific embodiments thereof, those skilled in the art will further appreciate that various adaptations, modifications and variations can be made to the application without departing from its spirit or scope.

Claims

1. An adjustable apicoectomy surgical guide based on cone beam CT measurements, comprising: the first positioning peg, the second positioning peg, the transverse guide rod, the first longitudinal member, the second longitudinal member; the first positioning peg and the second positioning peg are fixed on the teeth of the subject before cone beam CT shooting, and are located on both sides of the tooth root to be operated, respectively; the transverse guide rod is detachably installed between the first positioning peg and the second positioning peg; the center point of the first positioning peg is taken as the first reference point in the cone beam CT image, and the center point of the second positioning peg is taken as the second reference point in the cone beam CT image; a reference straight line is formed by connecting the first reference point and the second reference point; the axis of the transverse guide rod is located on the reference straight line; the first longitudinal member is used for determining the position of the actual drilling point on the bone surface of the subject to be operated; the upper end of the first longitudinal member is slidably installed on the transverse guide rod; the lower end of the first longitudinal member is formed with a pointed end pointing to the bone surface; the length of the first longitudinal member is adjustable; the determined drilling point in the cone beam CT image is designed as a virtual drilling point; according to the length of a first perpendicular segment between the virtual drilling point and the reference straight line, and the positions of the upper end of the first perpendicular segment relative to the first reference point and the second reference point, the length of the first longitudinal member and the position of the first longitudinal member on the transverse guide rod are adjusted, so that the length between the upper end and the lower end of the first longitudinal member is the same as the length of the first perpendicular segment, and the position of the upper end of the first longitudinal member on the transverse guide rod is the same as the position of the upper end of the first perpendicular segment on the reference straight line, thereby using the pointed end of the lower end of the first longitudinal member to indicate the position of the actual drilling point on the bone surface; the second longitudinal member is used for determining the drilling direction; the upper end of the second longitudinal member is slidably installed on the transverse guide rod; the lower end of the second longitudinal member is rotatably installed with a drilling axis indicating needle in multiple directions; the drilling axis indicating needle is used for indicating the direction of drilling into the bone surface; the length of the second longitudinal member is adjustable; the drilling point auxiliary point and the drilling axis are determined in the cone beam CT image; the drilling point auxiliary point is on the drilling axis, and is located outside the bone surface to be operated in the cone beam CT image, and is at a predetermined distance from the virtual drilling point; according to the length of a second perpendicular segment between the drilling auxiliary point and the reference straight line, and the positions of the upper end of the second perpendicular segment relative to the first reference point and the second reference point, the length of the second longitudinal member and the position of the second longitudinal member on the transverse guide rod are adjusted, so that the length between the upper end and the lower end of the second longitudinal member is the same as the length of the second perpendicular segment, and the position of the upper end of the second longitudinal member on the transverse guide rod is the same as the position of the upper end of the second perpendicular segment on the reference straight line, and the length of the drilling axis indicating needle extending from the lower end of the second longitudinal member is adjusted to be equal to the predetermined distance; the pointed end of the drilling axis indicating needle is in contact with the actual drilling point, and the extension direction of the drilling axis indicating needle is the drilling axis in the cone beam CT image.

2. The adjustable root tip surgery guide based on cone beam CT measurement according to claim 1, wherein: The first longitudinal member comprises a first slider; a first sliding hole is formed in the center of the first slider, and the upper end of the first longitudinal member is slidably mounted on the horizontal guide rod via the first sliding hole; a first bolt is mounted on the first slider, and the end of the first bolt is inserted into the first sliding hole and abuts against the horizontal guide rod to fix the first member; A first insertion rod is formed at the lower end of the first slider; A first insertion cylinder is mounted at the lower end of the first insertion rod, and the lower end of the first insertion rod is inserted into the upper end of the first insertion cylinder; a second bolt is mounted on the first insertion cylinder; the end of the second bolt abuts against the outer peripheral surface of the first insertion rod to fix the first insertion rod in the first insertion cylinder; the length of the first longitudinal member is adjusted by adjusting the depth of the first insertion rod inserted into the first insertion cylinder; The lower end of the first insertion cylinder is formed with a C-shaped piece, the upper end of the C-shaped piece is fixed at the lower end of the first insertion cylinder, and the lower end of the C-shaped piece is the lower end of the first longitudinal member; The central axes of the first insertion rod and the first insertion cylinder pass through the center of the first sliding hole in the upper portion and pass through the lower end of the C-shaped piece in the lower portion.

3. The adjustable root canal surgery guide based on cone beam CT measurement according to claim 1, wherein: The second longitudinal member comprises a second slider; a second sliding hole is formed in the center of the second slider, and the upper end of the second longitudinal member is slidably mounted on the horizontal guide rod via the second sliding hole; a third bolt is mounted on the second slider, and the end of the third bolt is inserted into the second sliding hole and abuts against the horizontal guide rod to fix the second member; A second insertion rod is formed at the lower end of the second slider; A second insertion cylinder is mounted at the lower end of the second insertion rod, and the lower end of the second insertion rod is inserted into the upper end of the second insertion cylinder; a fourth bolt is mounted on the second insertion cylinder; the end of the fourth bolt abuts against the outer peripheral surface of the second insertion rod to fix the second insertion rod in the second insertion cylinder; the length of the second longitudinal member is adjusted by adjusting the depth of the second insertion rod inserted into the second insertion cylinder; The lower end of the second insertion cylinder is formed with a circular truncated cone, and the circular truncated cone is connected to the lower end of the second insertion cylinder through a circular column; the diameter of the circular truncated cone is greater than the diameter of the circular column; A rotating cylinder is rotatably mounted on the outer side of the circular truncated cone and the circular column; the circular column extends into the interior of the rotating cylinder, and the circular truncated cone is mounted in the interior of the rotating cylinder; a fifth bolt is formed on the rotating cylinder; the end of the fifth bolt abuts against the outer peripheral surface of the circular column; A U-shaped member is integrally formed at the lower end of the rotating cylinder, a needle cylinder is rotatably mounted in the U-shaped gap of the U-shaped member; sixth screws are formed on both sides of the needle cylinder, one end of each sixth screw extends to the outside of the U-shaped member, and a nut is mounted on the end to fix the rotation angle of the needle cylinder; A drill axis indication needle is slidably inserted into the needle cylinder; after the drill axis indication needle is pulled out, the needle cylinder is used to guide the advancing direction of the drill bit, and the diameter of the drill axis indication needle corresponds to the drill bit.

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