Osteotomy system

Abstract

The invention relates to an osteotomy system, the osteotomy system comprises a thighbone extorsion positioner and an osteotomy plate, the thighbone extorsion positioner fits the distal osteotomy surface of the thighbone, the thighbone extorsion positioner is provided with a central hole and two first reference holes, the two first reference holes are respectively arranged on the left side and the right side of the central hole, and the first reference holes are respectively arranged on the left side and the right side of the central hole. The central hole and a medullary cavity central hole of the femur are coaxially arranged, two positioning holes can be formed in the inner condyle and the outer condyle of the femur through the two first reference holes, the osteotomy plate is provided with an osteotomy groove and two second reference columns, the two second reference columns can be inserted into the two positioning holes, and the two second reference columns can be inserted into the positioning holes. The distance between the two second reference columns is equal to the distance between the two first reference holes. According to the osteotomy system, accurate positioning and osteotomy can be conducted on the far end of the femur, errors during an operation are reduced, the operation risk is reduced, and postoperative recovery of a patient is facilitated.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular, to an osteotomy system. Background Art

[0002] Total knee arthroplasty is an effective means for treating severe knee diseases. Traditional osteotomy techniques rely on doctors' experience and touch, resulting in large errors during the operation. The knee joint replacement surgery process is complex and requires the use of many surgical instruments. There is no systematic reference benchmark for the cooperation of various surgical tools. During the operation, it mainly relies on anatomical landmarks and doctors' personal experience, which is not conducive to ensuring the accuracy of positioning and osteotomy during knee replacement and affects the postoperative recovery of patients. Summary of the Invention

[0003] The present invention aims to solve at least one of the technical problems in the related art to some extent.

[0004] To this end, an embodiment of the present invention provides an osteotomy system, which can accurately position and osteotomize the distal femur, reduce errors during the operation, reduce the surgical risk, and is beneficial to the postoperative recovery of patients.

[0005] The osteotomy system according to the embodiment of the present invention includes: a femoral external rotation locator, which is attached to the distal osteotomy surface of the femur. The femoral external rotation locator is provided with a central hole and two first reference holes, and the two first reference holes are respectively arranged on the left and right sides of the central hole. The central hole is coaxially arranged with the central hole of the femoral medullary cavity. Two positioning holes can be formed on the medial and lateral condyles of the femur through the two first reference holes; an osteotomy plate, which is provided with an osteotomy groove and two second reference posts, and the two second reference posts can be inserted into the two positioning holes, and the distance between the two second reference posts is equal to the distance between the two first reference holes.

[0006] According to the osteotomy system of the embodiment of the present invention, when the femoral external rotation locator is assembled with the distal osteotomy surface of the femur, the doctor can correspondingly form two positioning holes on the medial and lateral condyles of the femur through the two first reference holes on the femoral external rotation locator. When the osteotomy plate is assembled with the distal osteotomy surface of the femur, the two second reference posts on the osteotomy plate can be inserted into the two positioning holes, and the distance between the two second reference posts is equal to the distance between the two first reference holes. Thus, the femoral external rotation locator and the osteotomy plate can be positioned, measured, and osteotomized on the same reference, without relying on the doctor's personal experience, reducing the error during the operation, with high accuracy, reducing the surgical risk, and being beneficial to the postoperative recovery of patients.

[0007] In some embodiments, the femoral external rotation locator is provided with a first scale line and a first center identification line. The first scale line is arranged on the left and right sides of the central hole, and the first scale line extends along the left-right direction of the femoral external rotation locator. The first center identification line extends along the up-down direction of the femoral external rotation locator, and the extension line of the first center identification line passes through the center of the central hole.

[0008] In some embodiments, the osteotomy system further includes a medullary cavity identification card. The medullary cavity identification card is installed on the distal osteotomy surface of the femur. The medullary cavity identification card has a scale identification surface. The center of the scale identification surface is located on the axis of the medullary cavity central hole, and the scale identification surface is arranged opposite to the central hole.

[0009] In some embodiments, the aperture of the first reference hole is φ1, and the distance between the two first reference holes is L1, where 2.5 mm ≤ φ1 ≤ 4 mm and 20 mm ≤ L1 ≤ 66 mm.

[0010] In some embodiments, the femoral external rotation locator includes a positioning main body and a detecting member. The detecting member is slidably installed on the positioning main body. The detecting member is used to detect the highest point of the femoral anterior condyle. The central hole and the first reference hole are both provided on the positioning main body. The positioning main body is provided with a measurement scale line. The measurement scale line is arranged adjacent to the bottom of the positioning main body and extends along the left-right direction of the positioning main body.

[0011] In some embodiments, the femoral external rotation locator includes a positioning main body. The central hole and the first reference hole are both provided on the positioning main body. The lower side of the positioning main body has a fixing plate. The height difference between the center of the first reference hole and the fixing plate is H1, where 20 mm ≤ H1 ≤ 50 mm; and / or, there are multiple osteotomy grooves. The multiple osteotomy grooves are arranged at intervals along the up-down direction of the osteotomy plate. The height difference between the center of the lowermost osteotomy groove and the second reference post is H2, where 10 mm ≤ H2 ≤ 30 mm.

[0012] In some embodiments, the osteotomy plate is provided with a second scale line and a second center identification line. The second scale line is arranged on the connection line between the centers of the two second reference posts. The second center identification line extends along the up-down direction of the osteotomy plate, and the second center identification line is equidistant from the two second reference posts.

[0013] In some embodiments, the osteotomy system further includes a femoral condyle trial mold. The femoral condyle trial mold is provided with two third reference holes. The two third reference holes are coaxially arranged with the two positioning holes respectively, and the distance between the two third reference holes is equal to the distance between the two first reference holes.

[0014] In some embodiments, a third scale line and a third center identification line are provided on the femoral condyle trial mold. The third scale line is arranged on the connection line of the centers of the two third reference holes and extends outward along the connection line from the centers of the third reference holes respectively. The third center identification line extends in the up-down direction of the femoral condyle trial mold, and the third center identification line is located on the mid-sagittal plane of the femoral condyle trial mold.

[0015] In some embodiments, the femoral condyle trial mold includes a medial condyle trial mold and a lateral condyle trial mold arranged left and right. The two third reference holes are respectively provided on the medial condyle trial mold and the lateral condyle trial mold. Fourth reference holes are provided on both the medial condyle trial mold and the lateral condyle trial mold, and the fourth reference holes are provided on the upper sides of the third reference holes.

[0016] In some embodiments, the included angle between the axis of the fourth reference hole and the axis of the third reference hole is α, where 30° ≤ α ≤ 60°; and / or, the height difference between the fourth reference hole and the third reference hole is H4, where 15 mm ≤ H4 ≤ 30 mm; and / or, the distance between the two third reference holes is L2, where 20 mm ≤ L2 ≤ 66 mm; and / or, the distance between the two fourth reference holes is L3, where 25 mm ≤ L3 ≤ 40 mm; and / or, a fifth scale line is provided on the femoral condyle trial mold. The fifth scale line is arranged on the connection line of the centers of the two fourth reference holes and extends outward along the connection line from the centers of the fourth reference holes respectively; and / or, the osteotomy system further includes an intercondylar osteotomy guide plate, and a fifth reference post is provided on the intercondylar osteotomy guide plate. The fifth reference post is inserted into the fourth reference hole.

[0017] In some embodiments, two sixth reference holes are provided on the intercondylar osteotomy guide plate. The two sixth reference holes are respectively opposite to and coaxially arranged with the two third reference holes; and / or, the osteotomy system further includes an intercondylar trial mold. There is an accommodation space between the medial condyle trial mold and the lateral condyle trial mold, and the intercondylar trial mold is snap-fitted in the accommodation space; and / or, the diameter of the fifth reference post is 3 mm to 10 mm; and / or, the side surface of the intercondylar osteotomy guide plate where the fifth reference post is provided is an arc surface.

[0018] In some embodiments, a fourth scale line and a fourth center identification line are provided on the intercondylar osteotomy guide plate. The fourth scale line is arranged on the connection line of the centers of the two sixth reference holes and extends outward along the connection line to the outside of the centers of the sixth reference holes respectively. The fourth center identification line extends in the up-down direction of the intercondylar osteotomy guide plate, and the distances between the fourth center identification line and the two fourth reference holes are equal; and / or, the aperture of the sixth reference hole is 2.5 mm to 7 mm; and / or, the included angle between the axis of the fifth reference post and the axis of the sixth reference hole is b, where 30° ≤ b ≤ 60°. Description of the Drawings

[0019] Figure 1 is a schematic diagram of the osteotomy system according to an embodiment of the present invention for opening a medullary cavity center hole in the femur.

[0020] Figure 2 is a schematic diagram of the medullary cavity identification card of the osteotomy system according to an embodiment of the present invention.

[0021] Figure 3 is a schematic diagram of the connection between the medullary cavity identification card and the femur of the osteotomy system according to an embodiment of the present invention.

[0022] Figure 4 is a front view of the femoral external rotation locator of the osteotomy system according to an embodiment of the present invention.

[0023] Figure 5 is a side view of the femoral external rotation locator of the osteotomy system according to an embodiment of the present invention.

[0024] Figure 6 is a front view of the osteotomy plate of the osteotomy system according to an embodiment of the present invention.

[0025] Figure 7 is a side view of the osteotomy plate of the osteotomy system according to an embodiment of the present invention.

[0026] Figure 8 is a front view of the femoral condyle trial mold of the osteotomy system according to an embodiment of the present invention.

[0027] Figure 9 is a cross-sectional view of the femoral condyle trial mold of the osteotomy system according to an embodiment of the present invention.

[0028] Figure 10 is a cross-sectional view of the femoral condyle trial mold of the osteotomy system according to another embodiment of the present invention.

[0029] Figure 11 is a front view of the femoral condyle trial mold of the osteotomy system according to another embodiment of the present invention.

[0030] Figure 12 is an exploded view of the femoral external rotation locator, the osteotomy plate and the femoral condyle trial mold of the osteotomy system according to an embodiment of the present invention.

[0031] Figure 13 It is the front view of the intercondylar osteotomy guide plate of the osteotomy system according to an embodiment of the present invention.

[0032] Figure 14 It is the rear view of the intercondylar osteotomy guide plate of the osteotomy system according to an embodiment of the present invention.

[0033] Figure 15 It is the side view of the intercondylar osteotomy guide plate of the osteotomy system according to an embodiment of the present invention.

[0034] Figure 16 It is the installation cross-sectional view of the femoral condyle trial mold and the intercondylar osteotomy guide plate of the osteotomy system according to an embodiment of the present invention.

[0035] Figure 17 It is the exploded view of the femoral external rotation locator, the osteotomy plate, the femoral condyle trial mold and the intercondylar osteotomy guide plate of the osteotomy system according to an embodiment of the present invention.

[0036] Figure 18 It is the schematic diagram after the assembly of the femoral condyle trial mold and the intercondylar trial mold of the osteotomy system according to an embodiment of the present invention.

[0037] Figure 19 It is the schematic diagram before the assembly of the femoral condyle trial mold and the intercondylar trial mold of the osteotomy system according to an embodiment of the present invention.

[0038] Reference numerals:

[0039] 1. Femoral external rotation locator; 11. Positioning main body; 111. Central hole; 112. First reference hole; 113. First scale line; 114. First center identification line; 115. Fixing plate; 116. Measuring scale line; 12. Probing member;

[0040] 2. Osteotomy plate; 21. Osteotomy groove; 211. First osteotomy groove; 212. Second osteotomy groove; 213. Third osteotomy groove; 214. Fourth osteotomy groove; 22. Second reference post; 23. Second scale line; 24. Second center identification line;

[0041] 3. Medullary cavity identification card; 31. Scale identification surface; 32. Boss; 33. Mounting hole;

[0042] 4. Femoral condyle trial mold; 41. Third scale line; 42. Third center identification line; 43A. Inner condyle trial mold; 43B. Outer condyle trial mold; 431. Third reference hole; 432. Fourth reference hole; 433. Accommodating space; 44. Groove; 45. Ball head elastic plunger; 46. Fifth scale line;

[0043] 5. Intercondylar osteotomy guide plate; 51. Fifth reference post; 52. Sixth reference hole; 53. Fourth scale line; 54. Fourth center identification line;

[0044] 6. Intercondylar trial mold; 61. Column

[0045] 71. Medullary cavity center hole; 72. Positioning hole Specific embodiments

[0046] The embodiments of the present invention will be described in detail below. The examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to explain the present invention, and should not be construed as limiting the present invention.

[0047] Refer to the attached Figures 1 to 19 to describe the osteotomy system of the embodiments of the present invention.

[0048] As Figures 1 to 7 shown, the osteotomy system of the embodiments of the present invention includes: a femoral external rotation locator 1 and an osteotomy plate 2. The femoral external rotation locator 1 is attached to the distal osteotomy surface of the femur. The femoral external rotation locator 1 is provided with a central hole 111 and two first reference holes 112. The two first reference holes 112 are respectively arranged on the left and right sides of the central hole 111. The central hole 111 is coaxially arranged with the medullary cavity center hole 71 of the femur. Through the two first reference holes 112, two positioning holes 72 can be formed on the medial and lateral condyles of the femur. The osteotomy plate 2 is provided with an osteotomy groove 21 and two second reference posts 22. The two second reference posts 22 can be inserted into the two positioning holes 72. The distance between the two second reference posts 22 is equal to the distance between the two first reference holes 112.

[0049] According to the osteotomy system of the embodiments of the present invention, when the femoral external rotation locator 1 is assembled with the distal osteotomy surface of the femur, the doctor can correspondingly form two positioning holes 72 on the medial and lateral condyles of the femur through the two first reference holes 112 on the femoral external rotation locator 1. When the osteotomy plate 2 is assembled with the distal osteotomy surface of the femur, the two second reference posts 22 on the osteotomy plate 2 can be inserted into the two positioning holes 72, and the distance between the two second reference posts 22 is equal to the distance between the two first reference holes 112. Thus, the femoral external rotation locator 1 and the osteotomy plate 2 can be positioned, measured, and osteotomized on the same reference, without relying on the doctor's personal experience, reducing the error during the operation, having a higher accuracy, reducing the surgical risk, and being beneficial to the patient's postoperative recovery.

[0050] It can be understood that when the femoral external rotation locator 1 and the osteotomy plate 2 are respectively assembled with the distal osteotomy surface of the femur, the axis of the first reference hole 112 coincides with the axis of the second reference post 22. That is to say, the femoral external rotation locator 1 measures and positions the femur on the above-mentioned same reference, and the osteotomy plate 2 osteotomizes the femur on the same reference. Thus, an accurate positioning reference can be provided for the osteotomy plate 2 to ensure the accuracy of the osteotomy position, angle, and depth, thereby reducing the surgical error.

[0051] It should be noted that due to the individual differences in the size and shape of the femoral condyles, using the central hole 71 of the femoral medullary cavity as a reference can ensure a high degree of matching between the femoral prosthesis and the medullary cavity and bone shape. Therefore, before installing the femoral external rotation locator 1, it is necessary to first determine the central hole 71 of the medullary cavity, and use the central hole 71 of the medullary cavity as the assembly reference for the direct assembly of subsequent surgical tools (such as the femoral external rotation locator 1 and the osteotomy plate 2, etc.).

[0052] In other words, as Figure 3 and Figure 4 shown, when the femoral external rotation locator 1 is assembled onto the distal osteotomy surface of the femur, the central hole 111 needs to be aligned with the central hole 71 of the medullary cavity. From this, the specific positions of the two positioning holes 72 on the medial and lateral condyles can be determined through the two first reference holes 112 on the femoral external rotation locator 1. Among them, the midpoint of the line connecting the two first reference holes 112 is the midpoint of the central hole 111. After the femoral external rotation locator 1 is adjusted, fixing nails can be driven into the two first reference holes 112 to fix the femoral external rotation locator 1.

[0053] Optionally, as Figure 4 shown, the femoral external rotation locator 1 is provided with a first scale line 113 and a first center marking line 114. The first scale line 113 is arranged on both the left and right sides of the central hole 111, and the first scale line 113 extends along the left-right direction of the femoral external rotation locator 1. The first center marking line 114 extends along the up-down direction of the femoral external rotation locator 1, and the extension line of the first center marking line 114 passes through the center of the central hole 111. It can be understood that when there is a deviation in the assembly of the femoral external rotation locator 1 onto the distal osteotomy surface of the femur, the first scale line 113 and the first center marking line 114 can be used to accurately align the central hole 111 to the central hole 71 of the medullary cavity, thereby reducing or eliminating the error during the assembly of the femoral external rotation locator 1 and improving the accuracy after the assembly of the femoral external rotation locator 1.

[0054] Exemplarily, as Figure 4 shown, the first scale line 113 is provided on the line connecting the two first reference holes 112, and each 1 mm on the first scale line 113 is a scale interval. From this, it is convenient for the doctor to accurately assemble the femoral external rotation locator 1 onto the distal osteotomy surface of the femur, which is beneficial to reducing the error that occurs during the assembly of the femoral external rotation locator 1.

[0055] Optionally, as Figure 3As shown, the osteotomy system further includes a medullary cavity identification card 3. The medullary cavity identification card 3 is installed on the distal osteotomy surface of the femur. The medullary cavity identification card 3 has a scale identification surface 31. The center of the scale identification surface 31 is located on the axis of the medullary cavity central hole 71, and the scale identification surface 31 is arranged opposite to the central hole 111. It can be understood that since the midpoint of the medullary cavity central hole 71 is not easy to accurately locate, before assembling the femoral external rotation locator 1, the medullary cavity identification card 3 can be first installed on the distal end of the femur. The center of the scale identification surface 31 on the medullary cavity identification card 3 is the midpoint of the medullary cavity central hole 71. Thus, the center of the scale identification surface 31 can be used as the assembly reference for the subsequent surgical tools (such as the femoral external rotation locator 1 and the osteotomy plate 2, etc.) to be directly assembled. By setting the medullary cavity identification card 3 in the osteotomy system of the embodiment of the present invention, the accuracy of assembling the femoral external rotation locator 1 can be further improved, thereby ensuring the accuracy of measurement and positioning of the femoral external rotation locator 1.

[0056] Exemplarily, as Figure 2 and Figure 3 shown, a cylindrical boss 32 is provided on the medullary cavity identification card 3. The boss 32 is inserted into the medullary cavity central hole 71, and the scale identification surface 31 is provided on the boss 32. An installation hole 33 is provided at the upper side position of the medullary cavity identification card 3, and a pin can be driven into the position of the installation hole 33 to fixedly connect the medullary cavity identification card 3 with the femur.

[0057] Optionally, as Figure 4 shown, the aperture of the first reference hole 112 is φ1, and the distance between the two first reference holes 112 is L1, where 2.5 mm ≤ φ1 ≤ 4 mm and 20 mm ≤ L1 ≤ 66 mm. It can be understood that the two first reference holes 112 are cylindrical holes with the same diameter. The aperture of the first reference hole 112 can be selected between 2.5 mm and 4 mm. For example, the aperture of the first reference hole 112 can be 2.5 mm, 3 mm, 3.5 mm, 3.8 mm, 4 mm.

[0058] As Figure 4 shown, the distance L1 between the two first reference holes 112 can be selected between 20 mm and 66 mm. For example, the distance L1 between the two first reference holes 112 can be 20 mm, 30 mm, 40 mm, 50 mm, 60 mm, 66 mm.

[0059] By designing the first reference hole 112 with the above parameters in the osteotomy system of the embodiment of the present invention, more bone mass can be reserved for the femur, which is beneficial to the postoperative recovery of the patient, and the stability of the femoral external rotation locator 1 when assembled with the femur can be ensured.

[0060] In an example, as Figure 4 and 5As shown, the external femoral rotation locator 1 includes a positioning main body 11 and a detecting member 12. The detecting member 12 is slidably mounted on the positioning main body 11. The detecting member 12 is used to detect the highest point of the anterior femoral condyle. The central hole 111 and the first reference hole 112 are both provided on the positioning main body 11. A measurement scale line 116 is provided on the positioning main body 11. The measurement scale line 116 is arranged adjacent to the bottom of the positioning main body 11 and extends along the left-right direction of the positioning main body 11. It can be understood that the detecting member 12 is mounted at the upper end of the positioning main body 11 and its position in the up-down direction is adjustable. When the external femoral rotation locator 1 measures the femur, the fixing plate 115 on the lower side of the positioning main body 11 closely adheres to the posterior femoral condyle, and the front end of the detecting member 12 is placed on the anterior femoral condyle and moved to the highest point of the femoral cortex, whereby the height dimension of the femur in the up-down direction can be obtained.

[0061] As Figure 4 shown, the measurement scale line 116 is symmetric about the first center identification line 114. The measurement scale line 116 has a scale ruler of 0 - 90 mm on both the left and right sides of the first center identification line 114. When the external femoral rotation locator 1 is assembled to the distal end of the femur, the edges of the medial and lateral femoral condyles are aligned with the corresponding scales of the measurement scale line 116, whereby the data of the shape and size of the patient's medial and lateral femoral condyles can be obtained to find a femoral prosthesis of a suitable specification. At the same time, after obtaining the accurate femoral condyle model through measurement, the accurate femoral condyle model can also provide a basis for the selection of the model of the osteotomy plate 2.

[0062] Optionally, as Figure 5 shown, the lower side of the positioning main body 11 has a fixing plate 115. The height difference between the center of the first reference hole 112 and the fixing plate 115 is H1, where 20 mm ≤ H1 ≤ 50 mm. That is to say, the distance between the center of the first reference hole 112 and the posterior femoral condyle is H1. For example, H1 can be 20 mm, 25 mm, 30 mm, 35 mm, 40 mm, 45 mm, 50 mm.

[0063] As Figure 6 and Figure 7As shown, there are multiple osteotomy grooves 21, and the multiple osteotomy grooves 21 are arranged at intervals in the up-and-down direction of the osteotomy plate 2. Exemplarily, the osteotomy grooves 21 include a first osteotomy groove 211, a second osteotomy groove 212, a third osteotomy groove 213, and a fourth osteotomy groove 214. The first osteotomy groove 211, the second osteotomy groove 212, the third osteotomy groove 213, and the fourth osteotomy groove 214 are arranged at intervals in the height direction of the osteotomy plate 2. The first osteotomy groove 211, the second osteotomy groove 212, the third osteotomy groove 213, and the fourth osteotomy groove 214 are used for four-sided osteotomy of the distal femur (i.e., upper oblique osteotomy, lower oblique osteotomy, anterior condyle osteotomy, and posterior condyle osteotomy). By setting the osteotomy plate 2 to the above structure, the osteotomy system according to the embodiment of the present invention can improve the osteotomy efficiency, and there is no need to replace and adjust surgical tools multiple times during the operation, which simplifies the surgical steps and shortens the operation time.

[0064] As Figure 7 shown, the height difference between the center of the lowermost osteotomy groove 21 (i.e., the fourth osteotomy groove 214) and the center of the second reference column 22 is H2, where 10 mm ≤ H2 ≤ 30 mm. For example, H2 can be 10 mm, 15 mm, 20 mm, 25 mm, or 30 mm. It can be understood that the osteotomy amount of the posterior condyle of the femur is H3, and H3 = H1 - H2.

[0065] By adopting the above parameter ranges for H1 and H2, the osteotomy system according to the embodiment of the present invention can not only improve the accuracy of osteotomy of the osteotomy plate 2, facilitate the subsequent installation of the femoral prosthesis, but also retain more bone mass during femoral osteotomy, which is beneficial to the patient's postoperative recovery.

[0066] Optionally, as Figure 6 shown, the osteotomy plate 2 is provided with a second scale line 23 and a second center marking line 24. The second scale line 23 is arranged on the connection line of the centers of the two second reference columns 22. The second center marking line 24 extends in the up-and-down direction of the osteotomy plate 2, and the distance between the second center marking line 24 and the two second reference columns 22 is equal. It can be understood that when there is a deviation in the assembly of the osteotomy plate 2 to the distal osteotomy surface of the femur, the midpoint of the connection line of the two second reference columns 22 can be accurately positioned to the center of the medullary cavity central hole 71 or the center of the scale marking surface 31 on the medullary cavity identification card 3 by using the second scale line 23 and the second center marking line 24. Thus, the error during the assembly of the osteotomy plate 2 can be reduced or eliminated, and the accuracy after the assembly of the osteotomy plate 2 can be improved.

[0067] Exemplarily, each 1 mm on the second scale line 23 is a scale interval, which can facilitate the doctor to accurately assemble the osteotomy plate 2 to the distal osteotomy surface of the femur and is beneficial to reducing the error occurring during the assembly of the osteotomy plate 2.

[0068] In some embodiments, as Figure 8 and Figure 12As shown, the osteotomy system further includes a femoral condyle trial mold 4. Two third reference holes 431 are provided on the femoral condyle trial mold 4. The two third reference holes 431 are coaxially arranged with the two positioning holes 72 respectively, and the distance between the two third reference holes 431 is equal to the distance between the two first reference holes 112.

[0069] It can be understood that when the femoral external rotation locator 1, the osteotomy plate 2 and the femoral condyle trial mold 4 are respectively assembled with the distal osteotomy surface of the femur, the axes of the first reference holes 112, the axes of the second reference posts 22 and the axes of the third reference holes 431 coincide. That is to say, the femoral external rotation locator 1 measures and locates the femur on the above-mentioned same reference, the osteotomy plate 2 performs osteotomy on the femur on the same reference, and the femoral condyle trial mold 4 is assembled on the osteotomized femur on the same reference. Thereby, the surgical precision can be further improved, without relying on the personal surgical experience of the doctor, which is beneficial to improving the surgical effect, and helps the doctor to timely discover and correct possible problems such as poor joint alignment and uneven soft tissue tension during the operation.

[0070] Optionally, as Figure 8 shown, a third scale line 41 and a third center marking line 42 are provided on the femoral condyle trial mold 4. The third scale line 41 is arranged on the connection line of the centers of the two third reference holes 431, and the third scale line 41 extends outward along the connection line to the centers of the third reference holes 431 respectively. The third center marking line 42 extends along the up-down direction of the femoral condyle trial mold 4, and the third center marking line 42 is located on the mid-sagittal plane of the femoral condyle trial mold 4.

[0071] It can be understood that when there is a deviation in the assembly of the femoral condyle trial mold 4 to the distal osteotomy surface of the femur, the midpoint of the connection line of the two third reference holes 431 can be accurately positioned to the center of the medullary cavity central hole 71 or the scale marking surface 31 on the medullary cavity identification card 3 by using the third scale line 41 and the third center marking line 42. Thereby, the error during the assembly of the femoral condyle trial mold 4 can be reduced or eliminated, and the accuracy after the assembly of the femoral condyle trial mold 4 can be improved.

[0072] Exemplarily, each 1mm on the third scale line 41 is a scale interval, which can facilitate the doctor to accurately assemble the femoral condyle trial mold 4 to the femur after four-sided osteotomy, and is beneficial to reducing the error occurring during the assembly of the femoral condyle trial mold 4.

[0073] Optionally, as Figure 8 shown, the femoral condyle trial mold 4 includes a medial condyle trial mold 43A and a lateral condyle trial mold 43B arranged left and right. The two third reference holes 431 are respectively provided on the medial condyle trial mold 43A and the lateral condyle trial mold 43B. Fourth reference holes 432 are provided on both the medial condyle trial mold 43A and the lateral condyle trial mold 43B. The fourth reference holes 432 are provided above the third reference holes 431, and the fourth reference holes 432 are used for installing the intercondylar osteotomy guide plate 5.

[0074] In the osteotomy system according to an embodiment of the present invention, by providing a fourth reference hole 432 on the femoral condyle trial mold 4, the next intercondylar osteotomy treatment can be completed without disassembling the femoral condyle trial mold 4, so that it is not necessary to replace and adjust surgical tools multiple times during the operation, simplifying the surgical steps, improving the surgical efficiency, and shortening the operation time.

[0075] As Figure 16 shown, the osteotomy system further includes an intercondylar osteotomy guide plate 5. A fifth reference post 51 is provided on the intercondylar osteotomy guide plate 5. The fifth reference post 51 is inserted into the fourth reference hole 432, whereby the intercondylar osteotomy guide plate 5 can be fixed to the femoral condyle trial mold 4 to improve the stability after the intercondylar osteotomy guide plate 5 is assembled with the femoral condyle trial mold 4.

[0076] As Figure 10 shown, the included angle between the axis of the fourth reference hole 432 and the axis of the third reference hole 431 is α, where 30° ≤ α ≤ 60°. For example, α can be 30°, 40°, 50°, 60°. The height difference between the fourth reference hole 432 and the third reference hole 431 is H4, where 15 mm ≤ H4 ≤ 30 mm. For example, H4 can be 15 mm, 18 mm, 20 mm, 25 mm, 28 mm or 30 mm. This can improve the stability of the installation of the intercondylar osteotomy guide plate 5 and reduce the problem of the intercondylar osteotomy guide plate 5 shaking relative to the femoral condyle trial mold 4 during intercondylar osteotomy.

[0077] Optionally, as Figure 8 shown, the distance between the two third reference holes 431 is L2, where 20 mm ≤ L2 ≤ 66 mm. For example, L2 can be 20 mm, 30 mm, 40 mm, 50 mm, 60 mm, 66 mm. It should be noted that the distances between the two first reference holes 112, the distances between the two second reference posts 22, and the distances between the two third reference holes 431 are all equal. By designing the third reference hole 431 with the above parameters in the osteotomy system according to an embodiment of the present invention, more bone mass can be reserved for the femur, which is beneficial to the postoperative recovery of the patient, and the stability during the assembly of the femoral external rotator 1 and the femur can be ensured.

[0078] As Figure 11 shown, the distance between the two fourth reference holes 432 is L3, where 25 mm ≤ L3 ≤ 40 mm. For example, L3 can be 25 mm, 30 mm, 35 mm, 40 mm. It should be noted that the distance between the two fifth reference posts 51 is L4, and L4 = L3, that is, the distance between the two fifth reference posts 51 is equal to the distance between the two fourth reference holes 432.

[0079] By designing the fourth reference hole 432 of the osteotomy system according to the above parameters in the embodiments of the present invention, it can match the shape of the femoral condyle trial mold 4, which is beneficial to improving the installation stability of the femoral condyle trial mold 4 and the intercondylar osteotomy guide plate 5.

[0080] Optionally, as Figure 11 shown, a fifth scale line 46 is provided on the femoral condyle trial mold 4. The fifth scale line 46 is arranged on the connection line of the centers of the two fourth reference holes 432 and extends outward along the connection line to the centers of the fourth reference holes 432 respectively. The fifth scale line 46 can verify the position when the intercondylar osteotomy guide plate 5 is assembled with the femoral condyle trial mold 4, so as to improve the position accuracy after the installation of the intercondylar osteotomy guide plate 5 and the femoral condyle trial mold 4, and reduce or eliminate the error during the assembly of the intercondylar osteotomy guide plate 5.

[0081] Optionally, as Figure 15 shown, the diameter of the fifth reference post 51 is 3 mm to 10 mm. For example, the diameter of the fifth reference post 51 is 3 mm, 4 mm, 5 mm, 6 mm, 7 mm, 8 mm, 9 mm, 10 mm. Thus, it can not only ensure the structural strength of the fifth reference post 51, but also does not occupy a large space on the intercondylar osteotomy guide plate 5, and has a good positioning effect.

[0082] As Figure 15 shown, the side surface of the intercondylar osteotomy guide plate 5 where the fifth reference post 51 is provided is an arc surface. It can be understood that the surface of the intercondylar osteotomy guide plate 5 facing the femoral condyle trial mold 4 is an arc surface, and the contour of the arc surface matches the contour of the outer wall surface of the femoral condyle trial mold 4, so as to improve the stability after the assembly of the intercondylar osteotomy guide plate 5, which is beneficial to improving the accuracy of the intercondylar osteotomy guide plate 5 during osteotomy guiding.

[0083] Optionally, as Figures 13 to 16 shown, two sixth reference holes 52 are provided on the intercondylar osteotomy guide plate 5. The two sixth reference holes 52 are respectively opposite and coaxially arranged with the two third reference holes 431. Among them, the distance L5 between the two sixth reference holes 52 is equal to the distance L2 between the two third reference holes 431. It can be understood that fixing nails can be inserted into the third reference holes 431 and the sixth reference holes 52 to further improve the installation stability of the intercondylar osteotomy guide plate 5.

[0084] As Figure 14 shown, a fourth scale line 53 and a fourth center marking line 54 are provided on the intercondylar osteotomy guide plate 5. The fourth scale line 53 is arranged on the connection line of the centers of the two sixth reference holes 52, and the fourth scale line 53 extends outward along the connection line to the centers of the sixth reference holes 52 respectively. The fourth center marking line 54 extends along the up and down direction of the intercondylar osteotomy guide plate 5, and the distance between the fourth center marking line 54 and the two fifth reference posts 51 is equal.

[0085] It can be understood that when there is a deviation in the assembly of the intercondylar osteotomy guide plate 5 to the femoral condyle trial mold 4, the midpoint of the connection line of the two sixth reference holes 52 can be accurately positioned to the center of the medullary cavity center hole 71 or the center of the scale marking surface 31 on the medullary cavity identification card 3 by using the fourth scale line 53 and the fourth center marking line 54. Thus, the error during the assembly of the intercondylar osteotomy guide plate 5 can be reduced or eliminated, and the accuracy after the assembly of the intercondylar osteotomy guide plate 5 can be improved.

[0086] Exemplarily, each 1 mm on the fourth scale line 53 is a scale interval, which can facilitate the doctor to accurately assemble the intercondylar osteotomy guide plate 5 to the femoral condyle trial mold 4 and is beneficial to reducing the error occurring during the assembly of the intercondylar osteotomy guide plate 5.

[0087] As Figure 15 shown, the aperture of the sixth reference hole 52 is 2.5 mm to 7 mm. For example, the aperture of the sixth reference hole 52 can be 2.5 mm, 3 mm, 4 mm, 5 mm, 6 mm, 7 mm.

[0088] As Figure 15 shown, the included angle between the axis of the fifth reference post 51 and the axis of the sixth reference hole 52 is b, where 30° ≤ b ≤ 60°. For example, b can be 30°, 40°, 50°, 60°. It should be noted that as Figure 10 and Figure 15 shown, the value of the included angle b is equal to the value of the included angle α to improve the accuracy when the intercondylar osteotomy guide plate 5 is assembled with the femoral condyle trial mold 4, and the stability of the installation of the intercondylar osteotomy guide plate 5 can be ensured, and the problem of the intercondylar osteotomy guide plate 5 shaking relative to the femoral condyle trial mold 4 during intercondylar osteotomy can be reduced.

[0089] Optionally, as Figure 18 and Figure 19 shown, the osteotomy system further includes an intercondylar trial mold 6. There is an accommodation space 433 between the medial condyle trial mold 43A and the lateral condyle trial mold 43B, and the intercondylar trial mold 6 is snap-fitted in the accommodation space 433. Thus, the intercondylar trial mold 6 can be installed without removing the femoral condyle trial mold 4.

[0090] Exemplarily, as Figure 8 、 Figure 10 and Figure 18 shown, two grooves 44 are added at the upper inclined position of the femoral condyle trial mold 4, and two ball-headed elastic plungers 45 are added at the posterior condyle position of the femoral condyle trial mold 4. The above settings can install the intercondylar trial mold 6 without removing the femoral condyle trial mold 4. Specifically, the left and right columns 61 of the intercondylar trial mold 6 are respectively installed in the two grooves 44, and then the intercondylar trial mold 6 is pushed by hand so that the intercondylar trial mold 6 rotates around the column 61 towards the direction of the accommodation space 433. Then, the two holes at the posterior condyle position of the intercondylar trial mold 6 will automatically enter the ball-headed plungers of the femoral condyle trial mold 4, thereby completing the locking of the intercondylar trial mold 6 and the femoral condyle trial mold 4.

[0091] The assembly method of the above-mentioned intercondylar trial mold 6 and femoral condyle trial mold 4 is simple and the disassembly is convenient, so as to measure the flexion and extension gaps of the patient subsequently. And because the osteotomy system of the embodiment of the present invention uses the same reference positioning for osteotomy and measuring the flexion and extension gaps, it can ensure the consistency and coherence during the operation, which helps to reduce the surgical error and improve the overall effect of the operation.

[0092] In summary, the osteotomy system of the embodiment of the present invention has at least the following technical effects.

[0093] (1) The osteotomy accuracy of the femur can be improved. Each surgical tool is positioned on the same reference, providing an accurate positioning reference for the osteotomy plate 2, which can ensure the accuracy of the osteotomy position, angle and depth, thereby reducing surgical errors.

[0094] (2) The surgical stability can be enhanced. Since the femoral condyle trial mold 4, the intercondylar osteotomy guide plate 5 and the intercondylar trial mold 6 are located on the same reference and the close combination between the surgical tools helps to reduce the shaking during the operation, improve the stability of osteotomy, helps to protect the surrounding soft tissue structures and reduce surgical injuries.

[0095] (3) The surgical process can be simplified. There is no need to replace and adjust surgical tools multiple times during the operation, which simplifies the surgical steps, improves the surgical efficiency and shortens the operation time.

[0096] (4) The joint function can be evaluated in real time. Since each surgical tool is on the same reference, it is possible to evaluate the stability and functional state of the joint in real time without replacing or disassembling components. This helps the doctor to timely detect and correct possible problems such as poor joint alignment and uneven soft tissue tension during the operation.

[0097] (5) The surgical consistency can be maintained. Since the osteotomy system uses the same reference positioning for osteotomy and measuring the flexion and extension gaps, it can ensure the consistency and coherence during the operation, which helps to reduce the surgical error and improve the overall effect of the operation.

[0098] (6) The learning curve can be shortened. Since the osteotomy system performs operations such as osteotomy and measurement on the same positioning reference, it can better guide the doctor without relying on the doctor's personal experience.

[0099] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present invention.

[0100] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present invention, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise specifically and clearly defined.

[0101] In the present invention, unless otherwise clearly specified and defined, the terms "mounted", "connected", "coupled", "fixed", etc. shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection, an electrical connection, or communicable with each other; it may be directly connected, or indirectly connected through an intermediate medium, and it may be the internal communication of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0102] In the present invention, unless otherwise clearly specified and defined, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0103] In the present invention, the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples", etc. mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic descriptions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0104] Although the above embodiments have been shown and described, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Any changes, modifications, substitutions, and variations made by those of ordinary skill in the art to the above embodiments are within the protection scope of the present invention.

Claims

1. An osteotomy system, characterized in that: include: A femoral external rotation positioner, the femoral external rotation positioner is fitted with the distal osteotomy surface of the femur, the femoral external rotation positioner is provided with a central hole and two first reference holes, the two first reference holes are respectively arranged on the left and right sides of the central hole, the central hole is coaxially arranged with the central hole of the medullary cavity of the femur, and two positioning holes can be formed on the medial and lateral condyles of the femur through the two first reference holes; An osteotomy plate is provided with an osteotomy groove and two second reference columns, the two second reference columns can be inserted into the two positioning holes, and the distance between the two second reference columns is equal to the distance between the two first reference holes.

2. The osteotomy system according to claim 1, characterized in that: The femoral external rotation locator is provided with a first scale line and a first center marking line. The first scale line is arranged on the left and right sides of the central hole, and the first scale line extends along the left and right direction of the femoral external rotation locator. The first center marking line extends along the up and down direction of the femoral external rotation locator, and the extension line of the first center marking line passes through the center of the central hole.

3. The osteotomy system according to claim 2, characterized in that: The osteotomy system also includes a medullary cavity identification card, which is installed on the distal osteotomy surface of the femur. The medullary cavity identification card has a scale identification surface, the center of which is located on the axis of the medullary cavity center hole, and the scale identification surface is arranged opposite to the central hole.

4. The osteotomy system according to claim 1, characterized in that: The aperture of the first reference hole is φ1, and the distance between the two first reference holes is L1, wherein 2.5 mm ≤ φ1 ≤ 4 mm, and 20 mm ≤ L1 ≤ 66 mm; And / or, the femoral external rotation positioner includes a positioning body and a detection member, the detection member is slidably mounted on the positioning body, the detection member is used to detect the highest point of the anterior condyle of the femur, the central hole and the first reference hole are both provided on the positioning body, the positioning body is provided with measurement scale lines, the measurement scale lines are arranged adjacent to the bottom of the positioning body, and the measurement scale lines extend in the left-right direction of the positioning body; And / or, the femoral external rotation positioner comprises a positioning body, the central hole and the first reference hole are both provided on the positioning body, a fixing plate is provided on the lower side of the positioning body, and a height difference between the center of the first reference hole and the fixing plate is H1, wherein 20 mm ≤ H1 ≤ 50 mm; And / or, there are a plurality of osteotomy grooves, which are arranged at intervals along the vertical direction of the osteotomy plate, and the height difference between the osteotomy groove at the bottom layer and the center of the second reference column is H2, wherein 10 mm ≤ H2 ≤ 30 mm; And or, the osteotomy plate is provided with a second scale line and a second center identification line, the second scale line is arranged on the line connecting the centers of the two second reference columns, the second center identification line extends along the up and down direction of the osteotomy plate, and the second center identification line is equidistant from the two second reference columns.

5. The osteotomy system according to claim 1, characterized in that: The osteotomy system also includes a femoral condyle trial mold, which is provided with two third reference holes. The two third reference holes are coaxially arranged with the two positioning holes, and the spacing between the two third reference holes is equal to the spacing between the two first reference holes.

6. The osteotomy system according to claim 5, characterized in that: The femoral condyle trial mold is provided with a third scale line and a third center marking line. The third scale line is arranged on the line connecting the centers of the two third reference holes and extends along the line to the outside of the centers of the third reference holes respectively. The third center marking line extends in the up and down directions of the femoral condyle trial mold, and the third center marking line is located on the median sagittal plane of the femoral condyle trial mold.

7. The osteotomy system according to claim 6, characterized in that: The femoral condyle trial mold includes a medial condyle trial mold and a lateral condyle trial mold arranged on the left and right, the two third reference holes are respectively arranged on the medial condyle trial mold and the lateral condyle trial mold, and the medial condyle trial mold and the lateral condyle trial mold are both provided with a fourth reference hole, and the fourth reference hole is arranged on the upper side of the third reference hole.

8. The osteotomy system according to claim 7, characterized in that: The included angle between the axis of the fourth reference hole and the axis of the third reference hole is α, wherein 30°≤α≤60°; and / or, a height difference between the fourth reference hole and the third reference hole is H4, wherein 15 mm ≤ H4 ≤ 30 mm; and / or, the distance between the two third reference holes is L2, wherein 20 mm ≤ L2 ≤ 66 mm; and / or, the distance between the two fourth reference holes is L3, wherein 25 mm ≤ L3 ≤ 40 mm; And / or, the femoral condyle trial mold is provided with a fifth scale line, the fifth scale line is arranged on the line connecting the centers of the two fourth reference holes and extends along the line to the outside of the centers of the fourth reference holes respectively; And / or, the osteotomy system further comprises an intercondylar osteotomy guide plate, the intercondylar osteotomy guide plate is provided with a fifth reference column, and the fifth reference column is inserted into the fourth reference hole.

9. The osteotomy system according to claim 8, characterized in that: The intercondylar osteotomy guide plate is provided with two sixth reference holes, and the two sixth reference holes are respectively opposite to the two third reference holes and are coaxially arranged; And / or, the osteotomy system further comprises an intercondylar trial mold, a receiving space is provided between the medial condylar trial mold and the lateral condylar trial mold, and the intercondylar trial mold is clamped in the receiving space; And / or, the diameter of the fifth reference column is 3 mm to 10 mm; And / or, the side surface of the intercondylar osteotomy guide plate on which the fifth reference column is arranged is an arc-shaped surface.

10. The osteotomy system according to claim 9, characterized in that: The intercondylar osteotomy guide plate is provided with a fourth scale line and a fourth center marking line, the fourth scale line is arranged on the line connecting the centers of the two sixth reference holes and extends along the line to the outside of the center of the sixth reference hole, the fourth center marking line extends in the up-down direction of the intercondylar osteotomy guide plate, and the fourth center marking line is equidistant from the two fourth reference holes; And / or, the diameter of the sixth reference hole is 2.5 mm to 7 mm; And / or, the angle between the axis of the fifth reference column and the axis of the sixth reference hole is b, wherein 30°≤b≤60°.

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