Osteotomy guide

Abstract

The present invention discloses an osteotomy guide plate, comprising: a main body, the main body is provided with an osteotomy groove, the osteotomy groove penetrates the main body along the front-to-back direction, the osteotomy groove divides the main body into a first guide plate and a second guide plate, with the position of the first guide plate relative to the second guide plate as the left direction; a first positioning hole, which is arranged on the first guide plate, the axis of the first positioning hole is along the front-to-back direction; a second positioning hole, which is arranged on the second guide plate, the axis of the second positioning hole is along the front-to-back direction; a limiting hole, which is arranged on the second guide plate, the axis of the limiting hole is along the left-right direction, and the limiting hole is connected with the osteotomy groove; a slider, which is arranged on the first guide plate, the slider extends to the right, and the slider is inserted into the limiting hole after passing through the osteotomy groove, the shape of the slider matches the shape of the limiting hole, and the slider can be slidably arranged in the limiting hole left and right. The osteotomy guide plate of the present invention makes the error smaller when the two ends of the truncated jaw are spliced, and the correction of displacement is more accurate. The present invention can be applied to the guide of a surgical saw.

Description

Technical Field

[0001] The present invention relates to the field of surgical saw guides, and in particular to an osteotomy guide. Background Art

[0002] Mandibular osteotomy is a common surgical procedure for correcting mandibular malformation. Currently, an osteotomy guide is used to locate the segment of the mandible that needs to be cut. After the segment is cut, the remaining mandible is spliced ​​together and finally fixed with a bone plate. However, there is a large error in splicing the remaining mandible, resulting in deviation in the correction displacement. Summary of the invention

[0003] The purpose of the present invention is to provide an osteotomy guide plate to solve one or more technical problems existing in the prior art and at least provide a beneficial choice or create conditions.

[0004] The technical solutions adopted to solve the above technical problems are:

[0005] An osteotomy guide plate, comprising:

[0006] A main body, wherein the main body is provided with an osteotomy groove, the osteotomy groove penetrates the main body along the front-back direction, the osteotomy groove divides the main body into a first guide plate and a second guide plate, and the position of the first guide plate relative to the second guide plate is the left direction;

[0007] A first positioning hole, which is provided on the first guide plate, wherein the axis of the first positioning hole is along the front-rear direction;

[0008] A second positioning hole, which is arranged on the second guide plate, and the axis of the second positioning hole is along the front-back direction;

[0009] A limiting hole is provided on the second guide plate, the axis of the limiting hole is along the left-right direction, and the limiting hole is connected to the osteotomy groove;

[0010] A slider is arranged on the first guide plate, the slider extends to the right, and the slider is inserted into the limiting hole after passing through the osteotomy groove. The shape of the slider matches the shape of the limiting hole, and the slider can be slid left and right in the limiting hole.

[0011] The beneficial effects of the present invention are as follows: the front side of the main body is attached to the patient's jawbone, the patient's jawbone is drilled according to the positions of the first positioning hole and the second positioning hole, and a plurality of bone screws are respectively passed through the first positioning hole and the second positioning hole and screwed into the jawbone to complete the fixation of the main body, and the area corresponding to the osteotomy groove is the part that needs to be cut and intercepted, the jawbone is cut along the osteotomy groove, and then the jawbone segment is taken out, the bone screw and the main body are removed, and the first guide plate is spliced ​​with the second guide plate. Since the shape of the slider matches the shape of the limiting hole, the slider moves along the limiting hole This makes the splicing of the first guide plate and the second guide plate more accurate. After the first guide plate and the second guide plate are spliced, the hole positions on the bone plate are determined according to the positions of the first positioning hole and the second positioning hole. The hole positions on the bone plate are the hole positions after the two severed jaws are spliced. Finally, the bone plate is attached to the patient's jaw, and the two severed jaws are spliced ​​in accordance with the one-to-one correspondence between the hole positions of the bone plate and the hole positions on the patient's jaw. The patient's jaw is fixed with bone screws and the bone plate. Therefore, the error is smaller when the two severed jaws are spliced, and the correction of displacement is more accurate.

[0012] The osteotomy groove helps to accurately locate the osteotomy position and amount. Usually, after osteotomy surgery on the mandible, a proximal bone segment with condyle and coracoid process and a distal bone segment with dentition and inferior alveolar nerve are formed. The displacement of the proximal bone segment and the distal bone segment is adjusted by moving the slider to ensure accurate positioning of the proximal bone segment and the distal bone segment.

[0013] As a further improvement of the above technical solution, a groove is provided on the front side of the second guide plate, the groove is communicated with the limiting hole, and the sliding block passes through the limiting hole and extends into the groove.

[0014] The groove on the front side of the second guide plate is connected to the limiting hole, and the slider passes through the limiting hole and extends into the groove, so that the position of the slider can be observed through the groove, which facilitates accurate movement of the slider, and the width of the osteotomy groove can be accurately determined by the position of the slider in the groove.

[0015] As a further improvement of the above technical solution, a clamping portion is provided on the outer wall of the right end of the sliding block, and the clamping portion extends out of the outer periphery of the limiting hole.

[0016] Since the first guide plate and the second guide plate must match each other, in order to avoid mixing with other osteotomy guide plates after the first guide plate is separated from the second guide plate, the clamping portion at the right end of the slider prevents the slider from detaching from the limiting hole, so that the first guide plate and the second guide plate are connected together to prevent the first guide plate from separating from the second guide plate.

[0017] As a further improvement of the above technical solution, the two inner side surfaces of the osteotomy groove are respectively a first side surface and a second side surface, the first side surface is located on the first guide plate, the second side surface is located on the second guide plate, and the shape of the first side surface matches the shape of the second side surface.

[0018] After cutting the patient's jaw along the osteotomy groove, the first side surface of the first guide plate cooperates with the second side surface of the second guide plate. When the first guide plate and the second guide plate are assembled together, the first side surface fits the second side surface, thereby facilitating the accurate assembly of the first guide plate and the second guide plate and reducing the deviation of the correction displacement.

[0019] As a further improvement of the above technical solution, a concave cavity is provided on the front side surface of the main body, the concave cavity spans the first guide plate and the second guide plate in the left-right direction, and the first positioning hole and the second positioning hole are both provided in the concave cavity.

[0020] The concave cavity on the front side of the main body spans the first guide plate and the second guide plate in the left-right direction, and the first positioning hole and the second positioning hole are both arranged in the concave cavity. After the first guide plate and the second guide plate are spliced ​​together, the bone plate can be placed in the concave cavity without the need for additional tools to fix the bone plate, which makes it more convenient to set the hole position of the bone plate; and the outer shape of the bone plate is matched with the shape of the concave cavity, so that the bone plate can be accurately embedded in the concave cavity, so that the first positioning hole and the second positioning hole are accurately positioned with the hole positions on the bone plate.

[0021] As a further improvement of the above technical solution, there are at least two first positioning holes and at least two second positioning holes.

[0022] There are at least two first positioning holes and at least two second positioning holes. The patient's jaw is drilled through the first positioning holes and the second positioning holes, so that multiple hole positions can be accurately left on the patient's jaw. The bone plate is positioned through the multiple hole positions, and the bone plate is used to more accurately splice and fix the two severed jaw sections.

[0023] As a further improvement of the above technical solution, the inner wall of the limiting hole has at least one plane.

[0024] The inner wall of the limiting hole has at least one plane, and the shape of the slider matches the shape of the limiting hole, thereby preventing the slider from rotating in the limiting hole. When the first guide plate and the second guide plate are assembled, the slider cooperates with the limiting hole to prevent the first guide plate and the second guide plate from rotating relative to each other, thereby facilitating the accurate assembly of the first guide plate and the second guide plate and reducing the deviation of the correction displacement.

[0025] As a further improvement of the above technical solution, a third positioning hole is provided on the slider, and the axis of the third positioning hole is along the front-to-back direction. A fourth positioning hole is provided on the second guide plate, and the fourth positioning hole penetrates the second guide plate along the front-to-back direction. The axis of the fourth positioning hole intersects with the axis of the limiting hole, and the fourth positioning hole is located on the moving trajectory of the third positioning hole.

[0026] Move the first guide plate so that the third positioning hole on the slider is aligned with the fourth positioning hole on the second guide plate, and the first guide plate and the second guide plate are fitted to the patient's jawbone. First, bone screws are passed through the third positioning hole and the fourth positioning hole and then screwed into the jawbone to fix the relative position of the first guide plate and the second guide plate. Then, other bone screws are used to fix the first guide plate and the second guide plate, so that the positions of the first guide plate and the second guide plate are more accurate after fixation, thereby making the positions of the first positioning hole and the second positioning hole more accurate. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The present invention will be further described below in conjunction with the accompanying drawings and embodiments;

[0028] Figure 1 This is an axonometric diagram of an embodiment of the osteotomy guide plate provided by the present invention;

[0029] Figure 2 This is an axonometric schematic diagram of another angle of one embodiment of the osteotomy guide provided by the present invention;

[0030] Figure 3 This is a schematic diagram of the assembly of an embodiment of the osteotomy guide plate provided by the present invention;

[0031] Figure 4 The figure is a schematic assembly diagram of an osteotomy guide plate provided by the present invention from another angle of one embodiment.

[0032] 100, main body, 110, osteotomy groove, 111, first side, 112, second side, 120, concave cavity, 200, first guide plate, 210, first positioning hole, 220, slider, 221, clamping portion, 222, third positioning hole, 300, second guide plate, 310, second positioning hole, 320, limiting hole, 330, groove, 340, fourth positioning hole. DETAILED DESCRIPTION

[0033] This section will describe in detail the specific embodiments of the present invention. The preferred embodiments of the present invention are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present invention, but it cannot be understood as a limitation on the scope of protection of the present invention.

[0034] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., and orientations or positional relationships indicated are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0035] In the description of the present invention, if there are words such as "several", it means one or more, "more" means more than two, greater than, less than, exceed, etc. are understood as not including the number, and above, below, within, etc. are understood as including the number.

[0036] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0037] Reference Figures 1 to 4 The osteotomy guide plate of the present invention is provided in the following embodiments:

[0038] The osteotomy guide plate includes a main body 100, and the main body 100 is provided with an osteotomy groove 110, and the osteotomy groove 110 penetrates the main body 100 in the front-to-back direction. The osteotomy groove 110 divides the main body 100 into a first guide plate 200 and a second guide plate 300, and the first guide plate 200 is located on the left side of the second guide plate 300. The first guide plate 200 is provided with a first positioning hole 210, and the first positioning hole 210 penetrates the first guide plate 200 in the front-to-back direction. The second guide plate 300 is provided with a second positioning hole 310, and the second positioning hole 310 penetrates the second guide plate 300 in the front-to-back direction. The second guide plate 300 is provided with a limiting hole 320, and the axis of the limiting hole 320 is in the left-right direction, and the limiting hole 320 is connected to the osteotomy groove 110. The first guide plate 200 is provided with a slider 220, which extends to the right. The slider 220 passes through the osteotomy groove 110 and is inserted into the limiting hole 320. The shape of the slider 220 matches the shape of the limiting hole 320, and the slider 220 can slide left and right in the limiting hole 320. The front side of the main body 100 matches the shape of the patient's jawbone. A three-dimensional model of the patient's jawbone is formed by electronic computer tomography technology, and the main body 100 is manufactured using the three-dimensional model. For example, the main body 100 can be manufactured by casting, CNC machine tool processing, injection molding, etc. using the three-dimensional model of the jawbone as a template. In this embodiment, the main body 100 is manufactured by three-dimensional stereo printing technology, so that the front side of the main body 100 can fit the patient's jawbone. The front side of the main body 100 is fitted with the patient's jawbone, and the patient's jawbone is drilled according to the positions of the first positioning hole 210 and the second positioning hole 310, and then a plurality of bone screws are respectively passed through the first positioning hole 210 and the second positioning hole 310 and screwed into the jawbone to complete the fixation of the main body 100. The jawbone is cut along the osteotomy groove 110. The avoidance slider 220 is required during the cutting process. After the avoidance slider 220 cuts the jawbone, the cut and separated jawbone is taken out, and then the main body 100 can be removed to cut the area of ​​the avoidance slider 220, or the cutting tool can be inserted into the vacant space after the jawbone is cut to cut the area of ​​the avoidance slider 220. Then, the bone screw and the main body 100 are removed from the patient's jawbone, the first guide plate 200 and the second guide plate 300 are spliced, and the slider 220 moves to the right along the limiting hole 320, and the first guide plate 200 and the second guide plate 300 are close to each other. After the first guide plate 200 and the second guide plate 300 are spliced, the position of the connecting hole on the bone plate is determined according to the position of the first positioning hole 210 and the second positioning hole 310 at this time, and the patient's jawbone is cut into two sections, and each section of the jawbone has a reserved hole position. The reserved hole positions on the two sections of the jawbone are matched one by one with the position of the connecting hole on the bone plate to achieve the splicing of the two sections of the jawbone. The bone screws are passed through the connecting holes on the bone plate and screwed into the jawbone to complete the fixation of the patient's jawbone by the bone plate. At this time, the error is smaller when the two severed jawbone sections are spliced ​​together, and the correction of displacement is more accurate.

[0039] In some embodiments, there are at least two first positioning holes 210 on the first guide plate 200, and at least two second positioning holes 310 on the second guide plate 300. The bone screws cooperate with the first positioning holes 210 to limit the freedom of translation and rotation of the first guide plate 200 on the jawbone, and the bone screws cooperate with the second positioning holes 310 to limit the freedom of translation and rotation of the second guide plate 300 on the jawbone, thereby making the positioning of the first guide plate 200 and the second guide plate 300 more accurate.

[0040] In some embodiments, the inner wall of the limiting hole 320 has at least one plane, thereby limiting the freedom of the slider 220 to rotate in the limiting hole 320. The slider 220 is prevented from rotating in the limiting hole 320, so as to avoid the first guide plate 200 and the second guide plate 300 from rotating relative to each other and deviating after the slider 220 rotates.

[0041] In some embodiments, a groove 330 is provided on the front side of the second guide plate 300, and the groove 330 is connected to the limiting hole 320. The slider 220 passes through the limiting hole 320 and extends into the groove 330. When the slider 220 moves left and right in the limiting hole 320, the position of the right end of the slider 220 can be observed from the groove 330. A clamping portion 221 is provided on the outer wall of the right end of the slider 220, and the clamping portion 221 extends out of the outer periphery of the limiting hole 320, so that the clamping portion 221 prevents the slider 220 from detaching from the limiting hole 320, and the clamping portion 221 is located in the groove 330. The clamping portion 221 connects the first guide plate 200 and the second guide plate 300 together.

[0042] In some embodiments, the two inner sides of the osteotomy groove 110 are respectively a first side 111 and a second side 112. The first side 111 is located on the first guide plate 200, and the second side 112 is located on the second guide plate 300. The shapes of the first side 111 and the second side 112 match, and the first side 111 and the second side 112 can fit together.

[0043] In some embodiments, a concave cavity 120 is provided on the front side of the main body 100, and the concave cavity 120 spans the first guide plate 200 and the second guide plate 300. The shape of the concave cavity 120 can match the shape of the bone plate. The first positioning hole 210 and the second positioning hole 310 are both provided in the concave cavity 120. After the first guide plate 200 and the second guide plate 300 are assembled, the bone plate is provided in the concave cavity 120, and holes are provided on the bone plate at positions corresponding to the first positioning hole 210 and the second positioning hole 310, so that the positions of the connecting holes of the bone plate correspond one-to-one with the first positioning hole 210 and the second positioning hole 310.

[0044] In some embodiments, the slider 220 is provided with a third positioning hole 222, and the third positioning hole 222 penetrates the slider 220 in the front-to-back direction. The second guide plate 300 is provided with a fourth positioning hole 340, and the fourth positioning hole 340 penetrates the second guide plate 300 in the front-to-back direction. The axis of the limiting hole 320 intersects with the axis of the fourth positioning hole 340, and the slider 220 moves along the limiting hole 320 so that the position of the third positioning hole 222 changes, and the fourth positioning hole 340 is located on the moving track of the third positioning hole 222. The slider 220 is moved so that the third positioning hole 222 is directly opposite to the fourth positioning hole 340. The first guide plate 200 and the second guide plate 300 are fitted to the patient's jawbone, and bone screws are first passed through the third positioning hole 222 and the fourth positioning hole 340 and then screwed into the jawbone to fix the relative position of the first guide plate 200 and the second guide plate 300. Then other bone screws are used to fix the first guide plate 200 and the second guide plate 300, so that the positions of the first guide plate 200 and the second guide plate 300 are more accurate after fixation, thereby making the positions of the first positioning hole 210 and the second positioning hole 310 more accurate.

[0045] The preferred embodiments of the present invention are specifically described above, but the invention is not limited to the embodiments. Those skilled in the art may make various equivalent modifications or substitutions without violating the spirit of the invention. These equivalent modifications or substitutions are all included in the scope defined by the claims of this application.

Claims

1. An osteotomy guide plate, characterized in that: include: A main body (100), wherein the main body (100) is provided with an osteotomy groove (110), wherein the osteotomy groove (110) penetrates the main body (100) in the front-back direction, and the osteotomy groove (110) divides the main body (100) into a first guide plate (200) and a second guide plate (300), wherein the position of the first guide plate (200) relative to the second guide plate (300) is the left direction; A first positioning hole (210) is provided on the first guide plate (200), wherein the axis of the first positioning hole (210) is along the front-rear direction; A second positioning hole (310) is provided on the second guide plate (300), wherein the axis of the second positioning hole (310) is along the front-rear direction; A limiting hole (320) is provided on the second guide plate (300), the axis of the limiting hole (320) is along the left-right direction, and the limiting hole (320) is connected to the osteotomy groove (110); A slider (220) is arranged on the first guide plate (200). The slider (220) extends to the right. The slider (220) passes through the osteotomy groove (110) and is inserted into the limiting hole (320). The shape of the slider (220) matches the shape of the limiting hole (320). The slider (220) can be slid left and right in the limiting hole (320).

2. The osteotomy guide plate according to claim 1, characterized in that: A groove (330) is provided on the front side of the second guide plate (300), the groove (330) is communicated with the limiting hole (320), and the sliding block (220) passes through the limiting hole (320) and extends into the groove (330).

3. The osteotomy guide plate according to claim 2, characterized in that: A clamping portion (221) is provided on the outer wall of the right end of the sliding block (220), and the clamping portion (221) extends out from the outer periphery of the limiting hole (320).

4. The osteotomy guide plate according to claim 1, characterized in that: The two inner side surfaces of the osteotomy groove (110) are respectively a first side surface (111) and a second side surface (112); the first side surface (111) is located on the first guide plate (200), and the second side surface (112) is located on the second guide plate (300); the shape of the first side surface (111) and the shape of the second side surface (112) match each other.

5. The osteotomy guide plate according to claim 1, characterized in that: A concave cavity (120) is provided on the front side of the main body (100), the concave cavity (120) spans the first guide plate (200) and the second guide plate (300) in the left-right direction, and the first positioning hole (210) and the second positioning hole (310) are both provided in the concave cavity (120).

6. The osteotomy guide plate according to claim 1, characterized in that: There are at least two first positioning holes (210), and there are at least two second positioning holes (310).

7. The osteotomy guide plate according to claim 1, characterized in that: The inner wall of the limiting hole (320) has at least one plane.

8. The osteotomy guide plate according to claim 1, characterized in that: The slider (220) is provided with a third positioning hole (222), the axis of which is along the front-to-back direction; the second guide plate (300) is provided with a fourth positioning hole (340), the fourth positioning hole (340) penetrates the second guide plate (300) along the front-to-back direction; the axis of the fourth positioning hole (340) intersects with the axis of the limiting hole (320); the fourth positioning hole (340) is located on the moving track of the third positioning hole (222).

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