A type of osteotomy knife for the coronoid process of the ulna

Abstract

This invention provides a coronoid process osteotomy knife for the ulna, comprising a first knife blade. The first knife blade includes a first blade body and a first handle. A first intersection point is formed at the connection between the first blade body and the first handle. The right side of the first blade body and the right side of the first handle intersect at the first intersection point, forming an angle α1 of 190-220°. In use, the first knife blade utilizes the right side of the first blade body to avoid obstruction by the protruding portion in the middle of the coronoid fossa, reaching the osteophyte on the coronoid process of the ulna. During the resection, the inner curved surface of the first blade body is used to remove the osteophyte into a smooth arc surface consistent with the arcuate contour of the coronoid process, leaving no step. This invention's coronoid process osteotomy knife for the ulna, by utilizing the right side of the first blade body to avoid obstruction by the wall of the coronoid fossa, reaches the "blind zone"; then, by using the inner curved surface of the first blade body to conform to the original arcuate contour of the coronoid process, it thoroughly removes the osteophyte, achieving complete cleaning of the inner and outer sides of the coronoid process, solving the problem of traditional knife blades being unable to completely remove osteophytes due to angle limitations.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, specifically to a bone knife for osteotomy of the coronoid process of the ulna. Background Technology

[0002] The elbow joint is a crucial link connecting the upper arm and forearm, and its flexion, extension, and rotation functions are essential for the body to perform daily activities. A normal elbow joint has a flexion and extension range of approximately 0°-145°, and a pronation and supination range of approximately 80°. However, once osteoarthritis of the elbow joint occurs, with a series of pathological changes such as articular cartilage degeneration, osteophyte formation, and joint capsule contracture, the joint's range of motion gradually becomes restricted, and in severe cases, it can significantly reduce the patient's ability to perform daily activities.

[0003] In clinical practice, elbow arthroscopy has become an important method for treating osteoarthritis of the elbow joint. Compared with traditional open surgery, it has advantages such as less trauma, faster recovery, and lower risk of joint capsule adhesions, and can simultaneously treat multiple lesions such as loose bodies, synovitis, and cartilage damage. Clinical practice shows that the main cause of limited elbow flexion is osteophyte formation on the coronoid process of the ulna, but complete removal of this lesion under arthroscopy still faces many challenges. Specifically, the anterior chamber of the elbow joint is extremely small, and under normal physiological conditions, it can only accommodate instruments of about 2-3 mm. In addition, the coronoid process osteophyte is located behind the "C"-shaped articular surface formed by the capitulum of the humerus and the trochlea of ​​the humerus, and some scholars refer to this area as the "blind spot." Due to the limited angle of approach, traditional osteotomies or drills cannot reach the medial, lateral, and base of the coronoid process from multiple directions, often resulting in osteophyte residue exceeding 30%. Residual osteophytes can impact the trochlea of ​​the humerus when the elbow is flexed, which not only restricts range of motion but may also induce synovitis and pain, resulting in an average improvement of less than 30° in flexion function after surgery.

[0004] Therefore, how to design a bone cutter that can effectively handle anatomical blind spots and thus achieve full removal of osteophytes is a technical problem that has not yet been solved in the current technology. Summary of the Invention

[0005] Therefore, the technical problem to be solved by the present invention is to overcome the technical defects of the prior art, which is that the bone cutter or drill is difficult to reach the inner, outer and base of the coronoid process from multiple directions, often resulting in more than 30% osteophyte residue. The present invention provides a bone cutter for osteotomy of the ulnar coronoid process that can effectively handle anatomical blind spots and thus achieve full removal of osteophytes.

[0006] Therefore, the present invention provides a bone cutter for osteotomy of the coronoid process of the ulna, comprising: The first bone knife includes a first blade body and a first handle integrally connected to one axial end of the first blade body; the connection between the first blade body and the first handle forms a first intersection point. The first blade includes an inner arc surface and an outer arc surface of the first blade that are opposite each other. When the inner arc surface of the first blade is placed facing upward, the right side of the first blade and the right side of the first handle intersect at the first intersection point to form an angle α1 of 190-220°. The angle α2 between the tangent of the inner arc surface of the first blade body at the first intersection point and the axis of the first handle is 15-25°. From the first intersection point to the first blade tip of the first blade body, the projection length h1 of the two ends of the arc edge of the inner arc surface of the first blade body on the top-view orthographic projection plane is 23-24mm, and the arc radius r1 is 190.4-192.6mm; the length of the first handle is at least 70mm.

[0007] As a preferred embodiment, the portion of the first blade near the cutting edge extends a certain length toward the right side of the first blade to form a first widened blade head.

[0008] As a preferred embodiment, the width w1 of the first widened cutter head is 6-6.3 mm.

[0009] As a preferred embodiment, the two sharpening bevels on the two sides of the first blade end intersect to form a first cutting edge wedge angle, the size of which is 36-37°.

[0010] As a preferred embodiment, the first handle includes a first connecting segment and a first grip segment integrally connected to the first connecting segment, wherein the outer wall of the first grip segment is provided with a first anti-slip texture.

[0011] The present invention also provides a coronoid process osteotomy knife for the ulna, comprising: The second bone knife includes a second blade body and a second handle integrally connected to one axial end of the second blade body; the connection between the second blade body and the second handle forms a second intersection point. The second blade includes an inner arc surface and an outer arc surface of the second blade that are opposite each other. When the inner arc surface of the second blade is placed facing upwards, the left side of the second blade and the left side of the second handle intersect at the second intersection point to form an angle α3 of 190-220°. The angle α4 between the tangent of the inner arc surface of the second blade body at the second intersection point and the axis of the second handle is 15-25°. From the second intersection point to the cutting edge of the second blade, the projection length h2 of the two ends of the arc edge of the inner arc surface of the second blade on the top-view orthographic projection plane is 23-24mm, and the arc radius r2 is 190.4-192.6mm; the length of the second handle is at least 70mm.

[0012] As a preferred embodiment, the portion of the second blade near the cutting edge extends a certain length toward the left side of the second blade to form a second widened blade head.

[0013] As a preferred embodiment, the width w2 of the second widened cutter head is 6-6.3 mm.

[0014] As a preferred embodiment, the two sharpening bevels on the two sides of the cutting edge of the second blade intersect to form a second cutting edge wedge angle, the size of which is 36-37°.

[0015] As a preferred embodiment, the second handle includes a second connecting section and a second grip section integrally connected to the second connecting section, wherein the outer wall of the second grip section is provided with a second anti-slip texture.

[0016] The technical solution provided by this invention has the following advantages: 1. The ulnar coronoid process osteotomy knife of the present invention includes a first knife; wherein the first knife includes a first blade and a first handle integrally connected to one axial end of the first blade; the connection between the first blade and the first handle forms a first intersection point; the first blade includes an inner arc surface and an outer arc surface of the first blade, which are opposite each other; when the inner arc surface of the first blade is placed upward, the right side of the first blade and the right side of the first handle intersect at the first intersection point to form an angle α1 of 190-220°; the angle α2 between the tangent of the inner arc surface of the first blade at the first intersection point and the axis of the first handle is 15-25°; from the first intersection point to the cutting edge of the first blade, the projection length h1 of the two ends of the arc edge of the inner arc surface of the first blade on the top-view orthographic projection plane is 23-24 mm, and the arc radius r1 is 190.4-192.6 mm; the length of the first handle is at least 70 mm.

[0017] When removing osteophytes, the first osteotome can be accessed from either the left medial approach (i.e., the left medial incision approach) or the right lateral approach (i.e., the right lateral incision approach). Specifically: when accessing from the left medial approach, the right side of the first blade and the right side of the first handle of the first osteotome face inward and are in close contact with the part of the trochlea away from the femoral head; the ulnar coronoid process osteotomy osteotome of this application is designed such that the right side of the first blade and the right side of the first handle intersect at the first intersection to form an angle α1 of 190-220°, which makes the first blade have a significant lateral bend relative to the first handle. This allows the first blade to extend to the lateral side of the left coronoid process, avoiding the obstruction of the protruding part in the middle of the coronoid fossa, and smoothly reach the ulnar coronoid process osteophyte located in the anatomical "blind spot", making it convenient to remove the osteophyte that has grown in this location; The ulnar coronoid process osteotomy knife of this application has a projection length of 23-24mm on the top-view orthographic projection plane of the two ends of the arc edge of the inner arc surface of the first blade. The depth of the cutting instrument entering the human body is such that after the first blade is fully inserted from the incision on the left inner side, the cutting edge of the first blade is roughly opposite to the highest point of the coronoid process. At this time, the first handle is swung around the first intersection point as the center of rotation. This can adjust the cutting edge of the first blade to the position on the outer side of the coronoid process to facilitate the removal of osteophytes, and also allow the first handle to enter the human body from the incision position without enlarging the incision on the left inner side. During the resection, the first osteotome uses the inner arc surface of the first blade to perform an arc-shaped resection of the osteophyte on the outer side of the left coronal process, removing the osteophyte into a smooth arc surface that matches the arc contour of the coronal process itself, without leaving any sharp corners, thus reducing postoperative irritation.

[0018] Furthermore, the portion of the first blade near the cutting edge extends a certain length toward the right side of the first blade to form a first widened blade head; the first widened blade head formed after widening on the right side can penetrate deeper into the inner side, thereby completely removing the osteophyte on the outer side of the left coronoid process.

[0019] Correspondingly, when entering from the right lateral approach, the right side of the first blade and the right side of the first handle of the first osteotome face inward and are in close contact with the femoral head and the part of the trochlea near the femoral head; the ulnar coronoid process osteotome of this application is designed with the right side of the first blade and the right side of the first handle intersecting at the first intersection to form an angle α1 of 190-220°, so that the first blade has a significant lateral bend relative to the first handle. This allows the first blade to extend to the medial side of the right coronoid process, avoiding the obstruction of the protruding part in the middle of the coronoid fossa, and smoothly reach the ulnar coronoid process osteophyte located in the anatomical "blind spot", making it convenient to remove the osteophyte that has grown in this position; The ulnar coronoid process osteotomy knife of this application has a projection length of 23-24mm on the top-view orthographic projection plane of the two ends of the arc edge of the inner arc surface of the first blade, which is the depth at which the cutting instrument enters the human body. After the first blade is fully inserted from the right lateral side incision, the cutting tip of the first blade is roughly opposite to the highest point of the coronoid process. At this time, the first handle is swung around the first intersection point as the center of rotation. This can adjust the cutting tip of the first blade to the position of the inner side of the coronoid process to facilitate the removal of osteophytes, and also allow the first handle to enter the human body from the incision position without expanding the right lateral side incision. During the resection, the first osteotome uses the inner arc surface of the first blade to perform an arc-shaped resection of the osteophyte on the inner side of the right coronal process, removing the osteophyte into a smooth arc surface that matches the arc contour of the coronal process itself, without leaving any sharp corners, thus reducing postoperative irritation.

[0020] Furthermore, the portion of the first blade near the cutting edge extends a certain length toward the right side of the first blade to form a first widened blade head; the first widened blade head formed after widening on the right side can penetrate deeper into the inner side, thereby completely removing the osteophyte on the inner side of the right coronoid process.

[0021] When the osteotomy knife for the coronoid process of the ulna of this application is inserted, it can first enter the incision with the inner curved surface facing inward, that is, the inner curved surface is close to the trochlea. When it gradually enters to the vicinity of the internal joint cavity, it is then folded at 90° so that the cutting edge of the first blade is perpendicular to the outer side of the left coronoid process or the inner side of the right coronoid process. Then, it is swung at the first intersection point to allow the first handle to gradually enter and gradually remove the osteophytes. This method of entry with the inner curved surface facing inward can minimize damage to the blood vessels and nerves near the elbow joint.

[0022] The ulnar coronoid process osteotomy knife of the present invention can smoothly avoid the obstruction of the protruding part in the middle of the coronoid fossa by using the angle of the right side of the first blade, and can smoothly reach the "blind area" that is difficult to reach by traditional instruments; then, the inner arc surface of the first blade conforms to the original arc contour of the coronoid process, and fully removes the osteophytes, achieving thorough cleaning of the inner and outer sides of the coronoid process, solving the problem that traditional bone knives are difficult to completely remove osteophytes due to the limited angle.

[0023] 2. The present invention also provides a coronoid process osteotomy knife for the ulna, comprising a second knife, wherein the second knife includes a second knife body and a second handle integrally connected to one axial end of the second knife body; the connection between the second knife body and the second handle forms a second intersection point; the second knife body includes an inner arc surface and an outer arc surface of the second knife body that are opposite each other, and when the inner arc surface of the second knife body is placed upward, the left side of the second knife body and the left side of the second handle intersect at the second intersection point to form an angle α3 of 190-220°; the angle α4 between the tangent of the inner arc surface of the second knife body at the second intersection point and the axis of the second handle is 15-25°; from the second intersection point to the cutting edge of the second knife body, the projection length h2 of the two ends of the arc edge of the inner arc surface of the second knife body on the top-view orthographic projection plane is 23-24 mm, and the arc radius r2 is 190.4-192.6 mm; the length of the second handle is at least 70 mm.

[0024] When removing osteophytes, the second osteotome can be accessed from either the left lateral approach (i.e., the left hand lateral incision approach) or the right medial approach (i.e., the right hand medial incision approach) of the arthroscopy. Specifically: when accessing from the left lateral approach, the left side of the second blade and the left side of the second handle of the second osteotome face inward, and are in close contact with the femoral head and the portion of the trochlea near the femoral head; the ulnar coronoid process osteotomy osteotome of this application is designed such that the left side of the second blade and the left side of the second handle intersect at the second intersection to form an angle α3 of 190-220°, which makes the second blade have a significant lateral bend relative to the second handle. This allows the second blade to extend to the medial side of the left coronoid process, avoiding the obstruction of the protruding part in the middle of the coronoid fossa, and smoothly reaching the ulnar coronoid process osteophyte located in the anatomical "blind spot", making it convenient to remove the osteophyte that has grown in this location; The ulnar coronoid process osteotomy knife of this application has a projection length of 23-24mm on the top-view orthographic projection plane of the two ends of the arc edge of the inner arc surface of the second blade, which is the depth at which the cutting instrument enters the human body. After the second blade is fully inserted from the left lateral side incision, the cutting tip of the second blade is roughly opposite to the highest point of the coronoid process. At this time, the second handle can be swung around the second intersection point as the center of rotation. This can adjust the cutting tip of the second blade to the position of the inner side of the coronoid process to facilitate the removal of osteophytes, and also allow the second handle to enter the human body from the incision position without expanding the left lateral side incision. During the resection, the second osteotome uses the inner arc surface of the second blade to perform an arc-shaped resection of the osteophyte on the inner side of the left coronal process, removing the osteophyte into a smooth arc surface that matches the arc contour of the coronal process itself, without leaving any sharp corners, thus reducing postoperative irritation.

[0025] Furthermore, the portion of the second blade near the cutting edge extends a certain length toward the left side of the second blade to form a second widened blade head. The second widened blade head, formed after widening on the left side, allows the cutting edge to penetrate deeper into the inner side, thereby completely removing the osteophyte on the inner side of the left coronoid process.

[0026] Correspondingly, when entering from the right medial approach, the left side of the second blade and the left side of the second handle of the second osteotome face inward and are in close contact with the part of the trochlea away from the femoral head; the ulnar coronoid process osteotome of this application is designed with the left side of the second blade and the left side of the second handle intersecting at the second intersection to form an angle α3 of 190-220°, so that the second blade has a significant lateral bend relative to the second handle. This allows the second blade to extend to the lateral side of the right coronoid process, avoiding the obstruction of the protruding part in the middle of the coronoid fossa, and smoothly reach the ulnar coronoid process osteophyte located in the anatomical "blind spot", making it convenient to remove the osteophyte that has grown in this position; The ulnar coronoid process osteotomy knife of this application has a projection length of 23-24mm on the top-view orthographic projection plane of the two ends of the arc edge of the inner arc surface of the second blade, which is the depth at which the cutting instrument enters the human body. After the second blade is fully inserted from the right inner side incision, the cutting tip of the second blade is roughly opposite to the highest point of the coronoid process. At this time, the second handle can be swung around the second intersection point as the center of rotation. This can adjust the cutting tip of the second blade to the position of the outer side of the coronoid process to facilitate the removal of osteophytes, and also allow the second handle to enter the human body from the incision position without expanding the right inner side incision. During the resection, the second osteotome uses the inner arc surface of the second blade to perform an arc-shaped resection of the osteophyte on the outer side of the right coronal process, removing the osteophyte into a smooth arc surface that matches the arc contour of the coronal process itself, without leaving any sharp corners, thus reducing postoperative irritation.

[0027] Furthermore, the portion of the second blade near the cutting edge extends a certain length toward the left side of the second blade to form a second widened blade head. The second widened blade head, formed after widening on the left side, allows the cutting edge to penetrate deeper into the inner side, thereby completely removing the osteophyte on the outer side of the right coronoid process.

[0028] When the osteotomy knife for the coronoid process of the ulna is inserted, it can first enter the incision with the inner curved surface facing inward, that is, with the inner curved surface closely attached to the trochlea. When it gradually enters to the vicinity of the internal joint cavity, it is then folded 90° so that the cutting edge of the second blade is perpendicular to the inner side of the left coronoid process or the outer side of the right coronoid process. Then, it is swung at the second intersection point to allow the second handle to gradually enter and gradually remove the osteophytes. This method of entry with the inner curved surface facing inward can minimize damage to the blood vessels and nerves near the elbow joint.

[0029] The ulnar coronoid process osteotomy knife of the present invention, by means of the angle of the left side of the second blade, can smoothly avoid the obstruction of the protruding part in the middle of the coronoid fossa and smoothly reach the "blind area" that is difficult to reach by traditional instruments; then, by using the inner arc surface of the second blade to follow the original arc contour of the coronoid process, the osteophytes can be completely removed, and the inner and outer sides of the coronoid process can be thoroughly cleaned, which solves the problem that traditional bone knives are difficult to completely remove osteophytes due to the limited angle. Attached Figure Description

[0030] To more clearly illustrate the technical solutions in the prior art or specific embodiments of the present invention, the accompanying drawings used in the description of the prior art or specific embodiments are briefly introduced below.

[0031] Figure 1 This is a schematic diagram of the overall structure of the ulnar coronoid process osteotomy knife of the present invention.

[0032] Figure 2 yes Figure 1 Enlarged structural diagram of part A.

[0033] Figure 3yes Figure 1 Another stereoscopic view.

[0034] Figure 4 yes Figure 3 Enlarged structural diagram of section B.

[0035] Figure 5 yes Figure 1 Another stereoscopic view.

[0036] Figure 6 yes Figure 5 A magnified schematic diagram of the structure of section C.

[0037] Figure 7 This is a schematic diagram of the overall structure of another invention: the ulnar coronoid process osteotomy knife.

[0038] Figure 8 yes Figure 7 Enlarged structural diagram of section D.

[0039] Figure 9 yes Figure 7 Another stereoscopic view.

[0040] Figure 10 yes Figure 9 Enlarged structural diagram of section E in the middle.

[0041] Figure 11 yes Figure 7 Another stereoscopic view.

[0042] Figure 12 yes Figure 11 Enlarged structural diagram of section F in the middle.

[0043] Reference numerals: 1. First bone knife; 11. First blade; 12. First handle; 13. First intersection point; 14. Inner curved surface of the first blade; 15. Outer curved surface of the first blade; 16. Right side of the first blade; 17. Right side of the first handle; 18. Blade tip of the first blade; 19. First widened blade head; 120. First connecting section; 121. First grip section; 2. Second bone knife; 21. Second blade; 22. Second handle; 23. Second intersection point; 24. Inner curved surface of the second blade; 25. Outer curved surface of the second blade; 26. Left side of the second blade; 27. Left side of the second handle; 28. Blade tip of the second blade; 29. ​​Second widened blade head; 220. Second connecting section; 221. Second grip section. Detailed Implementation

[0044] To enable those skilled in the art to better understand this solution, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of this application.

[0045] It should be noted that the terms "first," "second," etc., in the claims and specification of this application are used to distinguish similar objects and are not used to describe a specific order or sequence. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such as a process, method, system, product, or device that includes a series of steps or units, not limited to those steps or units explicitly listed, but may also include other steps or units not explicitly listed or inherent to these processes, methods, products, or devices.

[0046] In this application, the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "middle," "vertical," "horizontal," "lateral," and "longitudinal" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for better description of this application and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation. Furthermore, some of the above terms may be used to indicate other meanings besides orientation or positional relationship; for example, the term "upper" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this application according to the specific circumstances. In addition, the term "multiple" should mean two or more. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other.

[0047] The present application will now be described in detail with reference to the accompanying drawings and embodiments. Example 1

[0048] This embodiment provides a osteotomy knife for the coronoid process of the ulna, such as... Figure 1-6As shown, it includes: a first bone knife 1; wherein, the first bone knife 1 includes a first blade body 11 and a first handle 12 integrally connected to one axial end of the first blade body 11; the connection between the first blade body 11 and the first handle 12 forms a first intersection point 13; the first blade body 11 includes an inner arc surface 14 and an outer arc surface 15 of the first blade body, which are vertically opposite each other. When the inner arc surface 14 of the first blade body is placed upward, the right side 16 of the first blade body 11 and the right side 17 of the first handle 12 are at the first intersection point. The intersection of points 13 forms an angle α1 of 190-220°; the angle α2 between the tangent of the inner arc surface 14 of the first blade body at the first intersection point 13 and the axis of the first handle 12 is 15-25°; from the first intersection point 13 to the first blade cutting edge 18 of the first blade body 11, the projection length h1 of the two ends of the arc edge of the inner arc surface 14 of the first blade body on the top-view orthographic projection plane is 23-24mm, and the arc radius r1 is 190.4-192.6mm; the length of the first handle 12 is at least 70mm.

[0049] When removing osteophytes, the first osteotome 1 can be accessed from either the left medial approach (i.e., the left medial incision approach) or the right lateral approach (i.e., the right lateral incision approach). Specifically: when accessing from the left medial approach, the right side 16 of the first blade and the right side 17 of the first handle of the first osteotome 1 face inward and are in close contact with the part of the trochlea away from the femoral head; in this embodiment, the osteotome of the ulnar coronoid process is designed such that the right side 16 of the first blade and the right side 17 of the first handle intersect at the first intersection 13 to form an angle α1 of 190-220°, so that the first blade 11 has a significant lateral bend relative to the first handle 12. This allows the first blade 11 to extend to the lateral side of the left coronoid process, avoiding the obstruction of the protruding part in the middle of the coronoid fossa, and smoothly reach the ulnar coronoid process osteophyte located in the anatomical "blind spot", making it convenient to remove the osteophyte that has grown in this position; In this embodiment, the ulnar coronoid process osteotomy knife has a projection length of 23-24mm on the top-view orthographic projection plane of the two ends of the arc edge of the inner arc surface 14 of the first knife body. The depth of the cutting instrument entering the human body is such that after the first knife body 11 has completely entered from the left inner side incision, the blade tip of the first knife body 11 is roughly opposite to the highest point of the coronoid process. At this time, the first handle 12 can be swung around the first intersection point 13 as the center of rotation. This can adjust the blade tip of the first knife body 11 to the outer side of the coronoid process to facilitate the removal of osteophytes, and also allow the first handle 12 to enter the human body from the incision position without expanding the left inner side incision. During the resection process, the first bone cutter 1 uses the inner arc surface of the first cutter body 11 to achieve arc-shaped resection of the osteophyte on the outer side of the left coronal process, cutting the osteophyte into a smooth arc surface consistent with the arc contour of the coronal process itself, without leaving sharp corners, thus reducing postoperative irritation.

[0050] Furthermore, the portion of the first blade 11 near the cutting edge 18 extends a certain length toward the right side 16 of the first blade to form a first widened blade head 19; the first widened blade head 19 formed after widening on the right side can penetrate deeper into the inner side, thereby completely removing the osteophyte on the outer side of the left coronoid process.

[0051] Correspondingly, when entering from the right lateral approach, the right side 16 of the first blade and the right side 17 of the first handle of the first bone knife 1 face inward and fit into contact with the femoral head and the part of the trochlea near the femoral head; the ulnar coronoid process osteotomy bone knife of this embodiment is designed so that the right side 16 of the first blade and the right side 17 of the first handle intersect at the first intersection 13 to form an angle α1 of 190-220°, so that the first blade 11 has a significant lateral bend relative to the first handle 12. This allows the first blade 11 to extend to the inner side of the right coronoid process, avoid the obstruction of the protruding part in the middle of the coronoid fossa, and smoothly reach the ulnar coronoid process osteophyte located in the anatomical "blind spot", making it convenient to remove the osteophyte that has grown in this position; In this embodiment, the ulnar coronoid process osteotomy knife has a projection length of 23-24mm on the top-view orthographic projection plane of the two ends of the arc edge of the inner arc surface 14 of the first knife body. The depth of the cutting instrument entering the human body is determined by the fact that after the first knife body 11 has completely entered from the right lateral side incision, the cutting tip of the first knife body 11 is roughly opposite to the highest point of the coronoid process. At this time, the first handle 12 can be swung around the first intersection point 13 as the center of rotation. This allows the cutting tip of the first knife body 11 to be adjusted to the position of the inner side of the coronoid process to facilitate the removal of osteophytes. It also allows the first handle 12 to enter the human body from the incision position without expanding the right lateral side incision. During the resection process, the first bone cutter 1 uses the inner arc surface of the first cutter body 11 to achieve arc-shaped resection of the osteophyte on the inner side of the right coronal process, removing the osteophyte into a smooth arc surface consistent with the arc contour of the coronal process itself, without leaving sharp corners, thus reducing postoperative irritation.

[0052] Furthermore, the portion of the first blade 11 near the cutting edge 18 extends a certain length toward the right side 16 of the first blade to form a first widened blade head 19; the first widened blade head 19 formed after widening the right side can penetrate deeper into the inner side, thereby completely removing the osteophyte on the inner side of the right coronoid process.

[0053] In this embodiment, when the osteotomy knife for the coronoid process of the ulna enters, it can first enter the incision with the inner curved surface facing inward, that is, the inner curved surface is close to the trochlea. When it gradually enters to the vicinity of the internal joint cavity, it is then folded 90° so that the cutting edge of the first knife body 11 is perpendicular to the outer side of the left coronoid process or the inner side of the right coronoid process. Then, it is swung at the first intersection point 13 to allow the first handle 12 to gradually enter and gradually remove the osteophytes. This method of entry with the inner curved surface facing inward can minimize damage to the blood vessels and nerves near the elbow joint.

[0054] The ulnar coronoid process osteotomy knife of this embodiment can smoothly avoid the obstruction of the protruding part in the middle of the coronoid fossa by using the angle of the right side 16 of the first knife body, and can smoothly reach the "blind area" that is difficult to reach by traditional instruments. Then, the inner arc surface 14 of the first knife body follows the original arc contour of the coronoid process to fully remove the osteophytes, and achieve thorough cleaning of the inner and outer sides of the coronoid process, solving the problem that traditional bone knives are difficult to completely remove osteophytes due to the limited angle.

[0055] In this embodiment, the projected length h1 of the two ends of the arc edge of the inner arc surface 14 of the first cutter body on the top-view orthographic projection plane is 23.4 mm, and the arc radius r1 is 190.56 mm. As a variation of the design, those skilled in the art, guided by the concept of this embodiment, can also set the length h1 of the inner arc surface 14 of the first cutter body to 23-24 mm, for example: 23.1 mm, 23.2 mm, 23.3 mm, 23.4 mm, 23.5 mm, 23.6 mm, 23.7 mm, 23.8 mm, 23.9 mm, 24 mm; and can also set the arc radius r1 to 190.4-190.56 mm. 0.6mm, such as 190.4mm, 190.41mm, 190.42mm, 190.43mm, 190.44mm, 190.45mm, 190.46mm, 190.47mm, 190.48mm, 190.49mm, 190.5mm, 190.51mm, 190.52mm, 190.53mm, 190.54mm, 190.55mm, 190.56mm, 190.57mm, 190.58mm, 190.59mm, 190.6mm, etc., are all within the scope of protection of this application.

[0056] The portion of the first blade 11 near the cutting edge 18 extends a certain length toward the right side 16 of the first blade to form a first widened blade head 19. The first widened blade head 19, formed after widening the right side, allows the cutting edge to penetrate deeper into the inner side, thereby completely removing bone spurs from the outer side of the left coronoid process and the inner side of the right coronoid process.

[0057] The width w1 of the first widened cutter head 19 is 6.18 mm. As a modified design, those skilled in the art, guided by the concept of this embodiment, can also set the width w1 of the first widened cutter head 19 to 6-6.3 mm, such as: 6 mm, 6.11 mm, 6.12 mm, 6.13 mm, 6.14 mm, 6.15 mm, 6.16 mm, 6.17 mm, 6.18 mm, 6.19 mm, 6.2 mm, 6.21 mm, 6.22 mm, 6.23 mm, 6.24 mm, 6.25 mm, 6.26 mm, 6.27 mm, 6.28 mm, 6.29 mm, 6.3 mm, etc., all of which are within the protection scope of this application.

[0058] The two sharpening bevels on the two sides of the first blade tip 18 intersect to form a first cutting edge wedge angle, the size of which is 36.6°. As a variation of the design, those skilled in the art, guided by the concept of this embodiment, can also set the size of the first cutting edge wedge angle to 36-37°, such as 36.1°, 36.2°, 36.3°, 36.4°, 36.5°, 36.6°, 36.7°, 36.8°, 36.9°, 37°, etc., all of which are within the protection scope of this application.

[0059] The first handle 12 includes a first connecting section 120 and a first grip section 121 integrally connected to the first connecting section 120. The outer wall of the first grip section 121 is provided with a first anti-slip texture. The anti-slip texture can increase the friction for the user's grip, making it easier to operate the bone knife. Example 2

[0060] This embodiment provides a osteotomy knife for the coronoid process of the ulna, such as... Figure 7-12 As shown, it includes: a second bone knife 2; wherein, the second bone knife 2 includes a second blade body 21 and a second handle 22 integrally connected to one axial end of the second blade body 21; the connection between the second blade body 21 and the second handle 22 forms a second intersection point 23; the second blade body 21 includes an inner arc surface 24 and an outer arc surface 25 of the second blade body, which are opposite each other. When the inner arc surface 24 of the second blade body is placed upward, the left side 26 of the second blade body 21 and the left side 27 of the second handle 22 are at the second intersection point. The intersection of points 23 forms an angle α3 of 190-220°; the angle α4 between the tangent of the inner arc surface 24 of the second blade body at the second intersection point 23 and the axis of the second handle 22 is 15-25°; from the second intersection point 23 to the cutting edge 28 of the second blade body 21, the projection length h2 of the two ends of the arc edge of the inner arc surface 24 of the second blade body on the top-view orthographic projection plane is 23-24mm, and the arc radius r2 is 190.4-192.6mm; the length of the second handle 22 is at least 70mm.

[0061] When removing osteophytes, the second osteotome 2 can be accessed from the left lateral approach (i.e., the left hand lateral incision approach) or the right medial approach (i.e., the right hand medial incision approach) of the arthroscopy. Specifically: when accessing from the left lateral approach, the left side 26 of the second blade and the left side 27 of the second handle of the second osteotome 2 face inward and are in close contact with the femoral head and the part of the trochlea near the femoral head; in this embodiment, the osteotome of the ulnar coronoid process is designed such that the left side 26 of the second blade and the left side 27 of the second handle intersect at the second intersection 23 to form an angle α3 of 190-220°, so that the second blade 21 has a significant lateral bend relative to the second handle 22. This allows the second blade 21 to extend to the medial side of the left coronoid process, avoiding the obstruction of the protruding part in the middle of the coronoid fossa, and smoothly reach the ulnar coronoid process osteophyte located in the anatomical "blind spot", making it convenient to remove the osteophyte that has grown in this position; In this embodiment, the ulnar coronoid process osteotomy knife has a projection length of 23-24mm on the top-view orthographic projection plane of the two ends of the arc edge of the inner arc surface 24 of the second blade, which corresponds to the depth of the cutting instrument entering the human body. After the second blade 21 has completely entered from the left lateral side incision, the blade tip of the second blade 21 is roughly opposite to the highest point of the coronoid process. At this time, the second handle 22 can be swung around the second intersection point 23 as the rotation center. This can adjust the blade tip of the second blade 21 to the position of the inner side of the coronoid process to facilitate the removal of osteophytes, and also allow the second handle 22 to enter the human body from the incision position without expanding the left lateral side incision. During the resection process, the second bone knife 2 utilizes the inner arc surface of the second blade 21 to achieve arc-shaped resection of the osteophyte on the inner side of the left coronal process, removing the osteophyte into a smooth arc surface consistent with the arc contour of the coronal process itself, without leaving sharp corners, thus reducing postoperative irritation.

[0062] Furthermore, the portion of the second blade 21 near the cutting edge 28 extends a certain length toward the left side 26 of the second blade to form a second widened blade head 29; the second widened blade head 29 formed after widening on the left side can penetrate deeper into the inner side, thereby completely removing the osteophyte on the inner side of the left coronoid process.

[0063] Correspondingly, when entering from the right medial approach, the left side 26 of the second blade and the left side 27 of the second handle of the second bone knife 2 face inward and are in close contact with the part of the trochlea away from the femoral head; the ulnar coronoid process osteotomy bone knife of this embodiment is designed so that the left side 26 of the second blade and the left side 27 of the second handle intersect at the second intersection 23 to form an angle α3 of 190-220°, so that the second blade 21 has a significant lateral bend relative to the second handle 22. This allows the second blade 21 to extend to the lateral side of the right coronoid process, avoid the obstruction of the protruding part in the middle of the coronoid fossa, and smoothly reach the ulnar coronoid process osteophyte located in the anatomical "blind spot", making it convenient to remove the osteophyte that has grown in this position; In this embodiment, the ulnar coronoid process osteotomy knife has a projection length of 23-24mm on the top-view orthographic projection plane of the two ends of the arc edge of the inner arc surface 24 of the second blade, which corresponds to the depth of the cutting instrument entering the human body. After the second blade 21 has completely entered from the right inner side incision, the cutting tip of the second blade 21 is roughly opposite to the highest point of the coronoid process. At this time, the second handle 22 is swung around the second intersection point 23 as the center of rotation. This can adjust the cutting tip of the second blade 21 to the outer side of the coronoid process to facilitate the removal of osteophytes, and also allow the second handle 22 to enter the human body from the incision position without expanding the right inner side incision. During the resection process, the second bone knife 2 utilizes the inner arc surface of the second blade 21 to achieve arc-shaped resection of the osteophyte on the outer side of the right coronal process, removing the osteophyte into a smooth arc surface consistent with the arc contour of the coronal process itself, without leaving sharp corners, thus reducing postoperative irritation.

[0064] Furthermore, the portion of the second blade 21 near the cutting edge 28 extends a certain length toward the left side 26 of the second blade to form a second widened blade head 29; the second widened blade head 29 formed after widening on the left side can penetrate deeper into the inner side, thereby completely removing the osteophyte on the outer side of the right coronoid process.

[0065] In this embodiment, when the osteotomy knife for the coronoid process of the ulna enters the incision, it can first be inserted with the inner curved surface facing inward, that is, the inner curved surface is close to the trochlea. When it gradually enters to the vicinity of the internal joint cavity, it is then folded 90° so that the cutting edge of the second blade 21 is perpendicular to the inner side of the left coronoid process or the outer side of the right coronoid process. Then, it is swung at the second intersection point 23 to allow the second handle 22 to gradually enter and gradually remove the osteophytes. This method of entry with the inner curved surface facing inward can minimize damage to the blood vessels and nerves near the elbow joint.

[0066] The ulnar coronoid process osteotomy knife of this embodiment, by using the angle of the left side 26 of the second knife body, can smoothly avoid the obstruction of the protruding part in the middle of the coronoid fossa and smoothly reach the "blind area" that is difficult to reach by traditional instruments; then, by using the inner arc surface 24 of the second knife body to follow the original arc contour of the coronoid process, the osteophytes are fully removed, and the inner and outer sides of the coronoid process are thoroughly cleaned, which solves the problem that traditional bone knives are difficult to completely remove osteophytes due to the limited angle.

[0067] In this embodiment, the projected length h2 of the two ends of the arc edge of the inner arc surface 24 of the second cutter body on the top-view orthographic projection plane is 23.4 mm, and the arc radius r2 is 190.56 mm. As a variation of the design, those skilled in the art, guided by the concept of this embodiment, can also set the length h2 of the inner arc surface 24 of the second cutter body to 23-24 mm, such as: 23.1 mm, 23.2 mm, 23.3 mm, 23.4 mm, 23.5 mm, 23.6 mm, 23.7 mm, 23.8 mm, 23.9 mm, or 24 mm; and can also set the arc radius r2 to 190.4-190.56 mm. 0.6mm, such as 190.4mm, 190.41mm, 190.42mm, 190.43mm, 190.44mm, 190.45mm, 190.46mm, 190.47mm, 190.48mm, 190.49mm, 190.5mm, 190.51mm, 190.52mm, 190.53mm, 190.54mm, 190.55mm, 190.56mm, 190.57mm, 190.58mm, 190.59mm, 190.6mm, etc., are all within the scope of protection of this application.

[0068] The portion of the second blade 21 near the cutting edge 28 extends a certain length toward the left side 26 of the second blade to form a second widened blade head 29. The second widened blade head 29, formed after widening the left side, allows the cutting edge to penetrate deeper into the inner side, thereby enabling the complete removal of osteophytes on the inner side of the left coronal process and the outer side of the right coronal process.

[0069] The width w2 of the second widened cutter head 29 is 6.18 mm. As a modified design, those skilled in the art, guided by the concept of this embodiment, can also set the width w2 of the second widened cutter head 29 to 6-6.3 mm, such as: 6 mm, 6.11 mm, 6.12 mm, 6.13 mm, 6.14 mm, 6.15 mm, 6.16 mm, 6.17 mm, 6.18 mm, 6.19 mm, 6.2 mm, 6.21 mm, 6.22 mm, 6.23 mm, 6.24 mm, 6.25 mm, 6.26 mm, 6.27 mm, 6.28 mm, 6.29 mm, 6.3 mm, etc., all of which are within the protection scope of this application.

[0070] The two beveled surfaces of the second blade tip 28 intersect to form a second cutting edge wedge angle, the size of which is 36.6°. As a variation of the design, those skilled in the art, guided by the concept of this embodiment, can also set the size of the second cutting edge wedge angle to 36-37°, such as 36.1°, 36.2°, 36.3°, 36.4°, 36.5°, 36.6°, 36.7°, 36.8°, 36.9°, 37°, etc., all of which are within the protection scope of this application.

[0071] The second handle 22 includes a second connecting section 220 and a second grip section 221 integrally connected to the second connecting section 220. The outer wall of the second grip section 221 is provided with a second anti-slip texture. The anti-slip texture can increase the friction for the user's grip, making it easier to operate the bone knife.

[0072] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the protection scope of this innovative technical solution.

Claims

1. A bone cutter for osteotomizing the coronoid process of the ulna, characterized in that, include: The first bone knife (1) includes a first blade (11) and a first handle (12) integrally connected to one axial end of the first blade (11); the connection between the first blade (11) and the first handle (12) forms a first intersection point (13). The first blade (11) includes an inner arc surface (14) and an outer arc surface (15) of the first blade that are opposite each other. When the inner arc surface (14) of the first blade is placed facing upward, the right side (16) of the first blade (11) and the right side (17) of the first handle (12) intersect at the first intersection point (13) to form an angle α1 of 190-220°. The angle α2 between the tangent of the inner arc surface (14) of the first blade body at the first intersection point (13) and the axis of the first handle (12) is 15-25°. From the first intersection point (13) to the first blade edge (18) of the first blade body (11), the projection length h1 of the two ends of the arc edge of the inner arc surface (14) of the first blade body on the top-view orthographic projection plane is 23-24mm, and the arc radius r1 is 190.4-192.6mm; the length of the first handle (12) is at least 70mm.

2. The osteotomy knife for the coronoid process of the ulna according to claim 1, characterized in that: The portion of the first blade (11) near the cutting edge (18) extends a certain length toward the right side (16) of the first blade to form a first widened blade head (19).

3. The osteotomy knife for the coronoid process of the ulna according to claim 2, characterized in that: The width w1 of the first widened cutter head (19) is 6-6.3 mm.

4. The osteotomy knife for the coronoid process of the ulna according to claim 1, characterized in that: The two sides of the cutting edge (18) of the first blade body intersect to form a first cutting edge wedge angle, the size of which is 36-37°.

5. The osteotomy knife for the coronoid process of the ulna according to claim 1, characterized in that: The first handle (12) includes a first connecting section (120) and a first grip section (121) integrally connected to the first connecting section (120). The outer wall of the first grip section (121) is provided with a first anti-slip texture.

6. A bone scalpel for osteotomizing the coronoid process of the ulna, characterized in that, include: The second bone knife (2) includes a second blade (21) and a second handle (22) integrally connected to one axial end of the second blade (21); the connection between the second blade (21) and the second handle (22) forms a second intersection point (23). The second blade (21) includes an inner arc surface (24) of the second blade and an outer arc surface (25) of the second blade, which are opposite each other. When the inner arc surface (24) of the second blade is placed facing upward, the left side (26) of the second blade (21) and the left side (27) of the second handle (22) intersect at the second intersection point (23) to form an angle α3 of 190-220°. The angle α4 between the tangent of the inner arc surface (24) of the second blade body at the second intersection point (23) and the axis of the second handle (22) is 15-25°; From the second intersection point (23) to the second blade edge (28) of the second blade body (21), the projection length h2 of the two ends of the arc edge of the inner arc surface (24) of the second blade body on the top-view orthographic projection plane is 23-24mm, and the arc radius r2 is 190.4-192.6mm; the length of the second handle (22) is at least 70mm.

7. The osteotomy knife for the coronoid process of the ulna according to claim 6, characterized in that: The portion of the second blade (21) near the cutting edge (28) extends a certain length toward the left side (26) of the second blade to form a second widened blade head (29).

8. The osteotomy knife for the coronoid process of the ulna according to claim 7, characterized in that: The width w2 of the second widened cutter head (29) is 6-6.3mm.

9. The osteotomy knife for the coronoid process of the ulna according to claim 6, characterized in that: The two sides of the cutting edge (28) of the second blade intersect to form a second cutting edge wedge angle, the size of which is 36-37°.

10. The osteotomy knife for the coronoid process of the ulna according to claim 6, characterized in that: The second handle (22) includes a second connecting section (220) and a second grip section (221) integrally connected to the second connecting section (220), and the outer wall of the second grip section (221) is provided with a second anti-slip texture.

Images