A positioning device for microfracture surgery, its use method and purpose

Abstract

The present invention provides a positioning device for microfracture surgery, a method of using the same, and a purpose thereof. The positioning device comprises a gripping rod and a clamping ring arranged at one end of the gripping rod, and a porous positioning plate embedded in the clamping ring. The positioning device for microfracture surgery provided by the present invention needs to be used in conjunction with active equipment such as an electric drill for drilling, fixing, guiding, or inserting and removing implants. The porous positioning plate effectively solves the problems of positioning, orientation, and depth control of the electric drill.

Description

Technical Field

[0001] The invention belongs to the field of orthopedic surgical instruments and relates to a positioning device for microfracture surgery, a use method and purpose thereof. Background Art

[0002] The most common clinical articular cartilage injury is sports trauma, which is more common in young people, while cartilage degeneration is more common in the elderly. The cartilage tissue of the joint cannot repair itself. If the damaged cartilage is not treated in time, it will spread and affect the surrounding normal cartilage. Coupled with continuous stress and wear, it will eventually develop into osteoarthritis. Arthritis is a degenerative joint disease with a very high incidence rate in the middle-aged and elderly population. It mainly damages the articular cartilage, bone and synovial tissue, causing joint pain, swelling and deformation. Mild cases show joint pain and knee joint movement disorders, while severe cases can lead to joint deformities and patient disabilities, which have a great negative impact on the patient's work and life.

[0003] Two existing treatment options include microfracture surgery and stem cell therapy, both of which are designed to provide a source of cells to the site of cartilage damage.

[0004] Microfracture surgery is a technique commonly used to repair articular cartilage damage. At the site of cartilage defect, the doctor first removes the damaged or calcified cartilage in the joint, and then drills a small hole in the subchondral bone to allow some bone marrow and blood to seep out of the hole to form a blood clot. This blood clot contains stem cells, such as multifunctional mesenchymal stem cells from the human bone marrow that seep out from the injury and may generate replacement tissue composed of fibrous tissue, fibrocartilage or hyaline cartilage to repair the injury. The human body itself will respond to the microfracture site as a muscle injury, so the surgery can provide patients with new replacement cartilage. Human skeletal cartilage is hyaline cartilage, and microfracture cannot actually repair the damaged cartilage itself, but only provides a substitute with similar properties.

[0005] During microfracture surgery, a small hole needs to be drilled in the subchondral bone to allow some bone marrow and blood to seep out of the hole and form a blood clot. In order to accurately locate the drilling position, other surgical instruments are needed to be used in conjunction with the electric drill to locate the drilling position more quickly and assist in directional drilling.

[0006] CN111938746A discloses a drilling guide device for minimally invasive calcaneal osteosynthesis, comprising a positioning base plate, a connecting plate, a locking bolt and a drilling guide tube. The shape of the positioning base plate matches the shape of the posterolateral plane of the calcaneus and is fixed to the plane by screws. A guide pin positioning hole is provided on the positioning base plate. The connecting plate is fixed to the positioning base plate by a locking bolt. The drilling guide tube is fixed to the outside of the connecting plate with its axis pointing to the guide pin positioning hole on the positioning base plate and the talar process of the calcaneus. One end of the drilling guide tube close to the calcaneus passes through the connecting plate to form a positioning card table matching the guide pin positioning hole on the positioning base plate.

[0007] CN201263713 discloses a fracture surgical reducer with an aiming function, comprising a rod body with a curved hook at one end, an external threaded section for fixing a bone hook and an aiming device installed at the upper end of the rod body at the other end of the rod body, the aiming device comprising a drill guide with one end sleeved on the external threaded section of the rod body and a nut for locking the drill guide, a rod sleeve being formed at one end of the drill guide, and a plurality of through holes for the drill to penetrate being formed at the other end and near the middle thereof, a rod sleeve being formed at one end of the bone hook, and a hook shape being formed at the other end opposite to the curved hook of the rod body.

[0008] CN100358477C discloses a backbone drilling protector, which has a guide sleeve with a drill hole. One end of the guide sleeve is connected to a C-shaped backbone support handle. The front end of the C-shaped backbone support handle also serves as a drill baffle, corresponding to the center line of the drill hole. The drill baffle is provided with a drill drop groove. A slider is installed in the guide sleeve, and a reset spring is installed at the rear end of the slider. The toggle handle on the slider is placed in the slide groove of the guide sleeve.

[0009] In recent years, with the advancement of 3D printing and digital medical technology, the substantial combination of 3D printing technology and medical clinical applications has gradually developed, and the development of new surgical instruments (auxiliary devices) and personalized medicine will inevitably prompt traditional medical equipment to change to adapt to new medical models. Digital technology can provide technical support for the design of new surgical instruments, while 3D printing technology can transform virtual designs into reality more directly and quickly, which not only meets the personalized needs of different patients, but also ensures the accuracy of surgery, which is of great significance to clinical surgery. Summary of the invention

[0010] In view of the shortcomings of the prior art, the purpose of the present invention is to provide a positioning device for microfracture surgery, a method of using the same and uses thereof. The positioning device for microfracture surgery provided by the present invention needs to be used in conjunction with active equipment such as an electric drill for drilling, fixing, guiding or inserting and removing implants. The porous positioning plate effectively solves the problems of positioning, orientation and depth control of the electric drill.

[0011] To achieve this object, the present invention adopts the following technical solutions:

[0012] In a first aspect, the present invention provides a positioning device for microfracture surgery, the positioning device comprising a gripping rod and a clamping ring disposed at one end of the gripping rod, and a porous positioning plate embedded in the clamping ring.

[0013] The positioning device for microfracture surgery provided by the present invention needs to be used in conjunction with active equipment such as an electric drill for drilling, fixing, guiding or inserting and removing implants. The porous positioning plate effectively solves the problems of positioning, orientation and depth control of the electric drill. It should be noted that the positioning device provided by the present invention can be optionally integrally formed by 3D printing or formed by forging or casting, preferably by 3D printing.

[0014] As a preferred technical solution of the present invention, the clamping ring is detachably arranged at one end of the holding rod.

[0015] Preferably, the clamping ring is detachably connected to the holding rod by plug-in or threading.

[0016] Preferably, the positioning device is used in conjunction with an electric drill, and the operator holds the holding rod and places the retaining ring close to the bone area to be drilled. When the positioning device is in use, the inner ring surface of the retaining ring is an annular step surface with a decreasing diameter gradient from top to bottom.

[0017] Preferably, the inner annular surface includes three levels of vertical annular surfaces, which are respectively recorded as the first vertical annular surface, the second vertical annular surface and the third vertical annular surface from top to bottom. The diameters of the first vertical annular surface, the second vertical annular surface and the third vertical annular surface decrease successively, and two adjacent levels of vertical annular surfaces are connected by a horizontal annular surface to form an annular step surface.

[0018] Preferably, the diameter of the first vertical annular surface is 9 to 11 mm, for example, it can be 9.0 mm, 9.2 mm, 9.4 mm, 9.6 mm, 9.8 mm, 10 mm, 10.2 mm, 10.4 mm, 10.6 mm, 10.8 mm or 11 mm, but is not limited to the listed values, and other unlisted values ​​within the numerical range are also applicable, and 10 mm is further preferred.

[0019] Preferably, the diameter of the second vertical annular surface is 8.5-10 mm, for example, it can be 8.5 mm, 8.6 mm, 8.7 mm, 8.8 mm, 8.9 mm, 9.0 mm, 9.1 mm, 9.2 mm, 9.3 mm, 9.4 mm, 9.5 mm, 9.6 mm, 9.7 mm, 9.8 mm, 9.9 mm or 10 mm, but is not limited to the listed values, and other unlisted values ​​within the numerical range are also applicable, and 9.8 mm is further preferred.

[0020] Preferably, the diameter of the third vertical annular surface is 8 to 10 mm, for example, it can be 8.0 mm, 8.2 mm, 8.4 mm, 8.6 mm, 8.8 mm, 9 mm, 9.2 mm, 9.4 mm, 9.6 mm, 9.8 mm or 10 mm, but is not limited to the listed values. Other unlisted values ​​within the numerical range are also applicable, and 9.6 mm is further preferred.

[0021] Preferably, the diameters of two adjacent vertical annular surfaces differ by 0.1 to 0.5 mm, for example, 0.1 mm, 0.2 mm, 0.3 mm, 0.4 mm or 0.5 mm, but are not limited to the listed values, and other values ​​not listed within the range are also applicable.

[0022] Preferably, the porous positioning plate is embedded in the circular space surrounded by the second vertical annular surface, and is mounted on a horizontal annular surface where the second vertical annular surface and the third vertical annular surface meet.

[0023] As a preferred technical solution of the present invention, the porous positioning plate is covered with through holes.

[0024] Preferably, the diameter of the through holes on the porous positioning plate is 0.5-2 mm, for example, it can be 0.5 mm, 0.6 mm, 0.7 mm, 0.8 mm, 0.9 mm, 1.0 mm, 1.1 mm, 1.2 mm, 1.3 mm, 1.4 mm, 1.5 mm, 1.6 mm, 1.7 mm, 1.8 mm, 1.9 mm or 2.0 mm, but it is not limited to the listed values, and other unlisted values ​​within the numerical range are also applicable, and 1 mm is further preferred.

[0025] Preferably, the hole spacing on the porous positioning plate is 1 to 3 mm, for example, it can be 1.0 mm, 1.2 mm, 1.4 mm, 1.6 mm, 1.8 mm, 1.9 mm, 2.0 mm, 2.2 mm, 2.4 mm, 2.6 mm, 2.8 mm or 3 mm, but is not limited to the listed values, and other unlisted values ​​within the numerical range are also applicable.

[0026] Preferably, the positioning device is made of metal or polymer material.

[0027] Preferably, the positioning device is made of stainless steel or nylon.

[0028] As a preferred technical solution of the present invention, an angle A is formed between the axis of the gripping rod and the cross section of the clamping ring.

[0029] Preferably, A is 20-60°, for example, it can be 20°, 25°, 30°, 35°, 40°, 45°, 50°, 55° or 60°, but is not limited to the listed values. Other unlisted values ​​within the numerical range are also applicable, and 40° is more preferably used.

[0030] In the positioning device provided by the present invention, the gripping rod and the clamping ring are fixedly connected at a certain angle, preferably a fixed angle of 20 to 60 degrees, which is more ergonomic, more comfortable to operate and hold, and better in use. For surgeons with left-handedness, mirror printing can be used when 3D printing is used.

[0031] As a preferred technical solution of the present invention, the gripping rod is divided into a gripping section and a connecting section, and the clamping ring is fixed to one end of the connecting section away from the gripping section.

[0032] Preferably, the gripping section is a straight rod with an elliptical cross-section.

[0033] In the present invention, the gripping section is designed to be an elliptical cross section in order to facilitate gripping by an operator.

[0034] As a preferred technical solution of the present invention, the plane passing through the axis of the gripping rod and forming an angle A with the cross section of the clamping ring is recorded as a reference plane, and the elliptical major axis cross section of the gripping section forms a certain angle with the reference plane.

[0035] Preferably, the elliptical major axis cross-section of the gripping segment is at an angle of 30 to 60° to the reference plane, for example, it may be 30°, 32°, 34°, 36°, 38°, 40°, 42°, 44°, 46°, 48°, 50°, 52°, 54°, 56°, 58° or 60°, but is not limited to the listed values, and other unlisted values ​​within the numerical range are also applicable, and 45° is further preferred.

[0036] In the present invention, the holding section of the elliptical cross-section is at a certain angle to the reference plane to prevent the operator's hand from blocking the line of sight and affecting the operation when holding; at the same time, the comfort of holding is improved, which is ergonomic. Furthermore, the angle bias can be designed according to the operator's dominant hand. For example, for operators with right hands, when designing the positioning device, the long axis direction of the elliptical cross-section of the positioning device in the use state can be designed to be a downward direction from left to right to improve the comfort of holding; and for operators with left hands, when designing the positioning device, the long axis direction of the elliptical cross-section of the positioning device in the use state can be designed to be an upward direction from left to right to improve the comfort of holding. Generally speaking, there are more operators with right hands, and conventional designs are more suitable for surgeons with right hands. For surgeons with left hands, when using 3D printing, mirror printing can be used to achieve the change of angle bias.

[0037] As a preferred technical solution of the present invention, the clamping ring is divided into a vertical section and a tapered section, and the outer peripheral annular surface of the vertical section is a circular annular surface with a constant diameter.

[0038] Preferably, the diameter of the outer peripheral annular surface of the tapered section gradually decreases from top to bottom.

[0039] Preferably, the clamping ring is fixed to the outer peripheral annular surface of the vertical section.

[0040] As a preferred technical solution of the present invention, a wing plate is provided on the gripping section.

[0041] In the present invention, the purpose of providing the wing plate is to increase the contact area when holding, so that the torque becomes larger and it is easier to hold. At the same time, it can also further improve the stability of holding and make it easier to control.

[0042] Preferably, the wing plate is a protruding structure formed by extending outward along the major axis direction of the elliptical cross-section of the gripping section.

[0043] Preferably, the cross section of the wing plate is parallel to the elliptical major axis cross section of the grip section.

[0044] Preferably, the wing plate is a flat plate with a thick center and thin edges.

[0045] Preferably, the wing plate is circular or elliptical.

[0046] Preferably, the wing plate has a diameter of 20 to 40 mm, for example, 20 mm, 22 mm, 24 mm, 26 mm, 28 mm, 30 mm, 32 mm, 34 mm, 36 mm, 38 mm or 40 mm, but is not limited to the listed values, and other unlisted values ​​within the numerical range are also applicable.

[0047] Preferably, the wing plate has a thickness of 2 to 5 mm, for example, it may be 2.0 mm, 2.2 mm, 2.4 mm, 2.6 mm, 2.8 mm, 3.0 mm, 3.2 mm, 3.4 mm, 3.6 mm, 3.8 mm, 4.0 mm, 4.2 mm, 4.4 mm, 4.6 mm, 4.8 mm or 5.0 mm, but is not limited to the listed values, and other unlisted values ​​within the numerical range are also applicable.

[0048] In a second aspect, the present invention provides a method for using the positioning device described in the first aspect, wherein the positioning device is used in conjunction with an electric drill, and an operator holds the holding rod and places the retaining ring close to the bone area to be drilled, and the electric drill drills holes in the bone area through the through holes on the porous positioning plate.

[0049] In a third aspect, the present invention provides a use of the positioning device described in the first aspect, wherein the positioning device is used for orthopedic surgery.

[0050] Compared with the prior art, the present invention has the following beneficial effects:

[0051] The positioning device for microfracture surgery provided by the present invention needs to be used in conjunction with active equipment such as an electric drill for drilling, fixing, guiding or inserting and removing implants. The porous positioning plate effectively solves the problems of positioning, orientation and depth control of the electric drill. BRIEF DESCRIPTION OF THE DRAWINGS

[0052] Figure 1 A schematic diagram of the structure of a positioning device provided for a specific embodiment of the present invention;

[0053] Figure 2 A schematic diagram of the structure of a positioning device provided for a specific embodiment of the present invention;

[0054] Figure 3 A schematic diagram of the structure of a positioning device provided for a specific embodiment of the present invention;

[0055] Among them, 1-clamp; 2-holding rod; 3-holding section; 4-connecting section; 5-wing plate. DETAILED DESCRIPTION

[0056] It should be understood that, in the description of the present invention, the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are 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, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first", "second", etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0057] It should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "disposed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0058] The technical solution of the present invention is further described below with reference to the accompanying drawings and through specific implementation methods.

[0059] In a specific embodiment, the present invention provides a positioning device for microfracture surgery, wherein the positioning device is as follows: Figure 1 , Figure 2 and Figure 3 As shown, it includes a holding rod 2 and a clamping ring 1 detachably arranged at one end of the holding rod 2. Optionally, the clamping ring 1 is detachably connected to the holding rod 2 by plug-in or threaded connection. A porous positioning plate is embedded in the clamping ring 1. The porous positioning plate is covered with through holes. The diameter of the through holes is 0.5 to 2 mm, and the hole spacing is 1 to 3 mm. The positioning device is made of stainless steel or nylon.

[0060] The positioning device is used in conjunction with an electric drill, and the operator holds the gripping rod 2 and places the clamping ring 1 close to the bone area to be drilled. When the positioning device is in use, the inner ring surface of the clamping ring 1 is an annular step surface with a decreasing diameter gradient from top to bottom. Specifically, the inner ring surface includes three levels of vertical ring surfaces, which are respectively recorded as the first vertical ring surface, the second vertical ring surface and the third vertical ring surface from top to bottom. The diameters of the first vertical ring surface, the second vertical ring surface and the third vertical ring surface decrease in sequence, and the adjacent two levels of vertical ring surfaces are connected by a horizontal ring surface to form an annular step surface. Specifically, the diameter of the first vertical ring surface is 9 to 11 mm, the diameter of the second vertical ring surface is 8.5 to 10 mm, the diameter of the third vertical ring surface is 8 to 10 mm, and the diameter of the adjacent two levels of vertical ring surfaces differs by 0.1 to 0.5 mm. The porous positioning plate is embedded in the circular space surrounded by the second vertical annular surface, and is set on the horizontal annular surface where the second vertical annular surface and the third vertical annular surface are connected.

[0061] like Figure 1 As shown, the axis of the gripping rod 2 forms an angle A with the cross section of the clamp ring 1, and A is 20-60 degrees. The gripping rod 2 is divided into a gripping section 3 and a connecting section 4. The clamp ring 1 is fixed to the end of the connecting section 4 away from the gripping section 3. The gripping section 3 is a straight rod with an elliptical cross section. Figure 2 and Figure 3 As shown, the plane passing through the axis of the gripping rod 2 and the cross section of the clamping ring 1 at an angle A is recorded as the reference plane, and the elliptical major axis section of the gripping section 3 is 30 to 60 degrees with the reference plane. The gripping section 3 is also provided with a wing plate 5, which is a protruding structure formed along the major axis direction of the elliptical section of the gripping section 3, and the cross section of the wing plate 5 is parallel to the elliptical major axis section of the gripping section 3. Further, the wing plate 5 is a circular or elliptical flat thin plate with a thick center and a thin edge. When the wing plate 5 is circular, the diameter of the wing plate 5 is 20 to 40 mm, and the thickness at the center of the wing plate 5 is 2 to 5 mm.

[0062] The clamping ring 1 is divided into a vertical section and a tapered section. The outer peripheral annular surface of the vertical section is a circular annular surface with a constant diameter. The diameter of the outer peripheral annular surface of the tapered section gradually decreases from top to bottom. The clamping ring 1 is fixed to the outer peripheral annular surface of the vertical section.

[0063] Example 1

[0064] The present embodiment provides a positioning device for microfracture surgery, the positioning device comprising a holding rod 2 and a clamping ring 1 detachably arranged at one end of the holding rod 2, the clamping ring 1 being detachably connected to the holding rod 2 by plugging and unplugging, a porous positioning plate embedded in the clamping ring 1, the porous positioning plate being covered with through holes, the through hole diameter being 0.5 mm, the hole spacing being 1 mm, and the positioning device being made of stainless steel.

[0065] The positioning device is used in conjunction with an electric drill. The operator holds the gripping rod 2 and places the clamping ring 1 close to the bone area to be drilled. When the positioning device is in use, the inner ring surface of the clamping ring 1 is an annular step surface with a decreasing diameter gradient from top to bottom. The inner ring surface includes three vertical ring surfaces. The three vertical ring surfaces are respectively recorded as the first vertical ring surface, the second vertical ring surface and the third vertical ring surface from top to bottom. The diameter of the first vertical ring surface is 9mm, the diameter of the second vertical ring surface is 8.5mm, and the diameter of the third vertical ring surface is 8mm. The adjacent two vertical ring surfaces are connected by a horizontal ring surface to form an annular step surface. The porous positioning plate is embedded in the circular space surrounded by the second vertical ring surface, and is set on the horizontal ring surface where the second vertical ring surface and the third vertical ring surface are connected.

[0066] The angle between the axis of the gripping rod 2 and the cross section of the snap ring 1 is 20°. The gripping rod 2 is divided into a gripping section 3 and a connecting section 4. The snap ring 1 is fixed to the end of the connecting section 4 away from the gripping section 3. The gripping section 3 is a straight rod with an elliptical cross section. The plane passing through the axis of the gripping rod 2 and forming an angle of 20° with the cross section of the snap ring 1 is recorded as the reference plane. The elliptical major axis section of the gripping section 3 is 30° to the reference plane. A wing plate 5 is also provided on the gripping section 3. The wing plate 5 is a circular thin plate that is formed by extending outward along the major axis direction of the elliptical cross section of the gripping section 3 to form a thick center and thin edges. The diameter of the wing plate 5 is 20 mm, and the thickness at the center of the wing plate 5 is 2 mm. The cross section of the wing plate 5 is parallel to the elliptical major axis section of the gripping section 3.

[0067] The clamping ring 1 is divided into a vertical section and a tapered section. The outer peripheral annular surface of the vertical section is a circular annular surface with a constant diameter. The diameter of the outer peripheral annular surface of the tapered section gradually decreases from top to bottom. The clamping ring 1 is fixed to the outer peripheral annular surface of the vertical section.

[0068] Example 2

[0069] The present embodiment provides a positioning device for microfracture surgery, the positioning device comprising a holding rod 2 and a clamping ring 1 detachably arranged at one end of the holding rod 2, the clamping ring 1 being detachably connected to the holding rod 2 by plugging and unplugging, a porous positioning plate embedded in the clamping ring 1, the porous positioning plate being covered with through holes, the through hole diameter being 0.7 mm, the hole spacing being 1.4 mm, and the positioning device being made of nylon.

[0070] The positioning device is used in conjunction with an electric drill. The operator holds the gripping rod 2 and places the clamping ring 1 close to the bone area to be drilled. When the positioning device is in use, the inner ring surface of the clamping ring 1 is an annular step surface with a decreasing diameter gradient from top to bottom. The inner ring surface includes three vertical ring surfaces. The three vertical ring surfaces are respectively recorded as the first vertical ring surface, the second vertical ring surface and the third vertical ring surface from top to bottom. The diameter of the first vertical ring surface is 9.5mm, the diameter of the second vertical ring surface is 9.4mm, and the diameter of the third vertical ring surface is 9.3mm. The adjacent two vertical ring surfaces are connected by a horizontal ring surface to form an annular step surface. The porous positioning plate is embedded in the circular space surrounded by the second vertical ring surface, and is set on the horizontal ring surface where the second vertical ring surface and the third vertical ring surface are connected.

[0071] The angle between the axis of the gripping rod 2 and the cross section of the snap ring 1 is 28 degrees. The gripping rod 2 is divided into a gripping section 3 and a connecting section 4. The snap ring 1 is fixed to the end of the connecting section 4 away from the gripping section 3. The gripping section 3 is a straight rod with an elliptical cross section. The plane passing through the axis of the gripping rod 2 and forming an angle of 25 degrees with the cross section of the snap ring 1 is recorded as the reference plane. The elliptical major axis section of the gripping section 3 is 36 degrees to the reference plane. A wing plate 5 is also provided on the gripping section 3. The wing plate 5 is a circular thin plate that is formed by extending outward along the major axis direction of the elliptical cross section of the gripping section 3 to form a thick center and thin edges. The diameter of the wing plate 5 is 24 mm, and the thickness at the center of the wing plate 5 is 2.6 mm. The cross section of the wing plate 5 is parallel to the elliptical major axis section of the gripping section 3.

[0072] The clamping ring 1 is divided into a vertical section and a tapered section. The outer peripheral annular surface of the vertical section is a circular annular surface with a constant diameter. The diameter of the outer peripheral annular surface of the tapered section gradually decreases from top to bottom. The clamping ring 1 is fixed to the outer peripheral annular surface of the vertical section.

[0073] Example 3

[0074] The present embodiment provides a positioning device for microfracture surgery, the positioning device comprising a holding rod 2 and a clamping ring 1 detachably arranged at one end of the holding rod 2, the clamping ring 1 being detachably connected to the holding rod 2 by plugging and unplugging, a porous positioning plate embedded in the clamping ring 1, the porous positioning plate being covered with through holes, the through holes having a diameter of 1 mm, and a hole spacing of 1.8 mm, and the positioning device is made of stainless steel.

[0075] The positioning device is used in conjunction with an electric drill. The operator holds the gripping rod 2 and places the clamping ring 1 close to the bone area to be drilled. When the positioning device is in use, the inner ring surface of the clamping ring 1 is an annular step surface with a decreasing diameter gradient from top to bottom. The inner ring surface includes three vertical ring surfaces. The three vertical ring surfaces are respectively recorded as the first vertical ring surface, the second vertical ring surface and the third vertical ring surface from top to bottom. The diameter of the first vertical ring surface is 10mm, the diameter of the second vertical ring surface is 9.8mm, and the diameter of the third vertical ring surface is 9.6mm. The adjacent two vertical ring surfaces are connected by a horizontal ring surface to form an annular step surface. The porous positioning plate is embedded in the circular space surrounded by the second vertical ring surface, and is set on the horizontal ring surface where the second vertical ring surface and the third vertical ring surface are connected.

[0076] The angle between the axis of the gripping rod 2 and the cross section of the snap ring 1 is 36 degrees. The gripping rod 2 is divided into a gripping section 3 and a connecting section 4. The snap ring 1 is fixed to the end of the connecting section 4 away from the gripping section 3. The gripping section 3 is a straight rod with an elliptical cross section. The plane passing through the axis of the gripping rod 2 and forming an angle of 30 degrees with the cross section of the snap ring 1 is recorded as the reference plane. The elliptical major axis section of the gripping section 3 is 42 degrees to the reference plane. A wing plate 5 is also provided on the gripping section 3. The wing plate 5 is a circular thin plate that is formed by extending outward along the major axis direction of the elliptical cross section of the gripping section 3 to form a thick center and thin edges. The diameter of the wing plate 5 is 28 mm, and the thickness at the center of the wing plate 5 is 3.2 mm. The cross section of the wing plate 5 is parallel to the elliptical major axis section of the gripping section 3.

[0077] The clamping ring 1 is divided into a vertical section and a tapered section. The outer peripheral annular surface of the vertical section is a circular annular surface with a constant diameter. The diameter of the outer peripheral annular surface of the tapered section gradually decreases from top to bottom. The clamping ring 1 is fixed to the outer peripheral annular surface of the vertical section.

[0078] Example 4

[0079] The present embodiment provides a positioning device for microfracture surgery, the positioning device comprising a holding rod 2 and a clamping ring 1 detachably arranged at one end of the holding rod 2, the clamping ring 1 being detachably connected to the holding rod 2 by plugging and unplugging, a porous positioning plate embedded in the clamping ring 1, the porous positioning plate being covered with through holes, the through hole diameter being 1.5 mm, the hole spacing being 2.2 mm, and the positioning device being made of nylon.

[0080] The positioning device is used in conjunction with an electric drill. The operator holds the gripping rod 2 and places the clamping ring 1 close to the bone area to be drilled. When the positioning device is in use, the inner ring surface of the clamping ring 1 is an annular step surface with a decreasing diameter gradient from top to bottom. The inner ring surface includes three vertical ring surfaces. The three vertical ring surfaces are respectively recorded as the first vertical ring surface, the second vertical ring surface and the third vertical ring surface from top to bottom. The diameter of the first vertical ring surface is 10.3mm, the diameter of the second vertical ring surface is 9.7mm, and the diameter of the third vertical ring surface is 9.1mm. The adjacent two vertical ring surfaces are connected by a horizontal ring surface to form an annular step surface. The porous positioning plate is embedded in the circular space surrounded by the second vertical ring surface, and is set on the horizontal ring surface where the second vertical ring surface and the third vertical ring surface are connected.

[0081] The angle between the axis of the gripping rod 2 and the cross section of the snap ring 1 is 44 degrees. The gripping rod 2 is divided into a gripping section 3 and a connecting section 4. The snap ring 1 is fixed to the end of the connecting section 4 away from the gripping section 3. The gripping section 3 is a straight rod with an elliptical cross section. The plane passing through the axis of the gripping rod 2 and forming an angle of 34 degrees with the cross section of the snap ring 1 is recorded as the reference plane. The elliptical major axis section of the gripping section 3 is 48 degrees to the reference plane. A wing plate 5 is also provided on the gripping section 3. The wing plate 5 is a circular thin plate that is formed by extending outward along the major axis direction of the elliptical cross section of the gripping section 3 to form a thick center and thin edges. The diameter of the wing plate 5 is 32 mm, and the thickness at the center of the wing plate 5 is 3.8 mm. The cross section of the wing plate 5 is parallel to the elliptical major axis section of the gripping section 3.

[0082] The clamping ring 1 is divided into a vertical section and a tapered section. The outer peripheral annular surface of the vertical section is a circular annular surface with a constant diameter. The diameter of the outer peripheral annular surface of the tapered section gradually decreases from top to bottom. The clamping ring 1 is fixed to the outer peripheral annular surface of the vertical section.

[0083] Example 5

[0084] The present embodiment provides a positioning device for microfracture surgery, the positioning device comprising a holding rod 2 and a clamping ring 1 detachably arranged at one end of the holding rod 2, the clamping ring 1 being detachably connected to the holding rod 2 by plugging and unplugging, a porous positioning plate embedded in the clamping ring 1, the porous positioning plate being covered with through holes, the through hole diameter being 1.8 mm, the hole spacing being 2.5 mm, and the positioning device being made of stainless steel.

[0085] The positioning device is used in conjunction with an electric drill. The operator holds the gripping rod 2 and places the clamping ring 1 close to the bone area to be drilled. When the positioning device is in use, the inner ring surface of the clamping ring 1 is an annular step surface with a decreasing diameter gradient from top to bottom. The inner ring surface includes three vertical ring surfaces. The three vertical ring surfaces are respectively recorded as the first vertical ring surface, the second vertical ring surface and the third vertical ring surface from top to bottom. The diameter of the first vertical ring surface is 10.6mm, the diameter of the second vertical ring surface is 10.3mm, and the diameter of the third vertical ring surface is 10mm. The adjacent two vertical ring surfaces are connected by a horizontal ring surface to form an annular step surface. The porous positioning plate is embedded in the circular space surrounded by the second vertical ring surface, and is set on the horizontal ring surface where the second vertical ring surface and the third vertical ring surface are connected.

[0086] The angle between the axis of the gripping rod 2 and the cross section of the snap ring 1 is 52 degrees. The gripping rod 2 is divided into a gripping section 3 and a connecting section 4. The snap ring 1 is fixed to the end of the connecting section 4 away from the gripping section 3. The gripping section 3 is a straight rod with an elliptical cross section. The plane passing through the axis of the gripping rod 2 and forming an angle of 35 degrees with the cross section of the snap ring 1 is recorded as the reference plane. The elliptical major axis section of the gripping section 3 is 54 degrees to the reference plane. A wing plate 5 is also provided on the gripping section 3. The wing plate 5 is a circular thin plate that is formed by extending outward along the major axis direction of the elliptical cross section of the gripping section 3 to form a thick center and thin edges. The diameter of the wing plate 5 is 36 mm, and the thickness at the center of the wing plate 5 is 4.2 mm. The cross section of the wing plate 5 is parallel to the elliptical major axis section of the gripping section 3.

[0087] The clamping ring 1 is divided into a vertical section and a tapered section. The outer peripheral annular surface of the vertical section is a circular annular surface with a constant diameter. The diameter of the outer peripheral annular surface of the tapered section gradually decreases from top to bottom. The clamping ring 1 is fixed to the outer peripheral annular surface of the vertical section.

[0088] Example 6

[0089] The present embodiment provides a positioning device for microfracture surgery, the positioning device comprising a holding rod 2 and a clamping ring 1 detachably arranged at one end of the holding rod 2, the clamping ring 1 being detachably connected to the holding rod 2 by plugging and unplugging, a porous positioning plate embedded in the clamping ring 1, the porous positioning plate being covered with through holes, the through hole diameter being 2 mm, the hole spacing being 3 mm, and the positioning device being made of nylon.

[0090] The positioning device is used in conjunction with an electric drill. The operator holds the gripping rod 2 and places the clamping ring 1 close to the bone area to be drilled. When the positioning device is in use, the inner ring surface of the clamping ring 1 is an annular step surface with a decreasing diameter gradient from top to bottom. The inner ring surface includes three vertical ring surfaces. The three vertical ring surfaces are respectively recorded as the first vertical ring surface, the second vertical ring surface and the third vertical ring surface from top to bottom. The diameter of the first vertical ring surface is 11mm, the diameter of the second vertical ring surface is 10mm, and the diameter of the third vertical ring surface is 9mm. The adjacent two vertical ring surfaces are connected by a horizontal ring surface to form an annular step surface. The porous positioning plate is embedded in the circular space surrounded by the second vertical ring surface, and is set on the horizontal ring surface where the second vertical ring surface and the third vertical ring surface are connected.

[0091] The angle between the axis of the gripping rod 2 and the cross section of the snap ring 1 is 60°. The gripping rod 2 is divided into a gripping section 3 and a connecting section 4. The snap ring 1 is fixed to the end of the connecting section 4 away from the gripping section 3. The gripping section 3 is a straight rod with an elliptical cross section. The plane passing through the axis of the gripping rod 2 and forming an angle of 50° with the cross section of the snap ring 1 is recorded as the reference plane. The elliptical major axis section of the gripping section 3 is 60° to the reference plane. A wing plate 5 is also provided on the gripping section 3. The wing plate 5 is a circular thin plate that is formed by extending outward along the major axis direction of the elliptical cross section of the gripping section 3 to form a thick center and thin edges. The diameter of the wing plate 5 is 40 mm, and the thickness at the center of the wing plate 5 is 5 mm. The cross section of the wing plate 5 is parallel to the elliptical major axis section of the gripping section 3.

[0092] The clamping ring 1 is divided into a vertical section and a tapered section. The outer peripheral annular surface of the vertical section is a circular annular surface with a constant diameter. The diameter of the outer peripheral annular surface of the tapered section gradually decreases from top to bottom. The clamping ring 1 is fixed to the outer peripheral annular surface of the vertical section.

[0093] The applicant declares that the above is only a specific implementation mode of the present invention, but the protection scope of the present invention is not limited thereto. Those skilled in the art should understand that any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed by the present invention shall fall within the protection scope and disclosure scope of the present invention.

Claims

1. A positioning device for microfracture surgery, characterized in that: The positioning device comprises a holding rod and a clamping ring arranged at one end of the holding rod; A porous positioning plate is embedded in the clamping ring; the clamping ring is detachably arranged at one end of the holding rod; the clamping ring is detachably connected to the holding rod by plug-in or threaded connection; The positioning device is used in conjunction with an electric drill, and an operator holds the holding rod and places the clamp ring close to the bone area to be drilled; When the positioning device is in use, the inner ring surface of the clamping ring is an annular step surface with a decreasing diameter gradient from top to bottom; the inner ring surface includes three levels of vertical ring surfaces, which are respectively recorded as a first vertical ring surface, a second vertical ring surface and a third vertical ring surface from top to bottom, and the diameters of the first vertical ring surface, the second vertical ring surface and the third vertical ring surface decrease in sequence, and two adjacent vertical ring surfaces are connected by a horizontal ring surface to form an annular step surface; The multi-hole positioning plate is embedded in the circular space surrounded by the second vertical annular surface, and is set on the horizontal annular surface where the second vertical annular surface and the third vertical annular surface are connected.

2. The positioning device according to claim 1, characterized in that: The diameter of the first vertical annular surface is 9-11 mm.

3. The positioning device according to claim 2, characterized in that: The diameter of the first vertical annular surface is 10 mm.

4. The positioning device according to claim 1, characterized in that: The diameter of the second vertical annular surface is 8.5-10 mm.

5. The positioning device according to claim 4, characterized in that: The diameter of the second vertical annular surface is 9.8 mm.

6. The positioning device according to claim 1, characterized in that: The diameter of the third vertical annular surface is 8-10 mm.

7. The positioning device according to claim 6, characterized in that: The diameter of the third vertical annular surface is 9.6 mm.

8. The positioning device according to any one of claims 2 to 7, characterized in that: The diameters of two adjacent vertical annuli differ by 0.1 to 1 mm.

9. The positioning device according to claim 1, characterized in that: The porous positioning plate is covered with through holes.

10. The positioning device according to claim 9, characterized in that: The diameter of the through holes on the porous positioning plate is 0.5-2 mm.

11. The positioning device according to claim 10, characterized in that: The diameter of the through holes on the porous positioning plate is 1 mm.

12. The positioning device according to claim 9, characterized in that: The hole spacing on the porous positioning plate is 1 to 3 mm.

13. The positioning device according to claim 1, characterized in that: The material of the positioning device is metal or polymer material.

14. The positioning device according to claim 13, characterized in that: The material of the positioning device is stainless steel or nylon.

15. The positioning device according to claim 1, characterized in that: Angle A is formed between the axis of the gripping rod and the cross section of the clamping ring.

16. The positioning device according to claim 15, characterized in that: The A is 20-60°.

17. The positioning device according to claim 16, characterized in that: The angle A is 40°.

18. The positioning device according to claim 15, characterized in that: The gripping rod is divided into a gripping section and a connecting section, and the clamping ring is fixed on one end of the connecting section away from the gripping section.

19. The positioning device according to claim 18, characterized in that The gripping section is a straight rod with an elliptical cross section.

20. The positioning device according to claim 19, characterized in that The plane which is the axis of the gripping rod and forms an angle A with the cross section of the clamping ring is recorded as the reference plane, and the elliptical major axis cross section of the gripping section forms a certain angle with the reference plane.

21. The positioning device according to claim 20, characterized in that The elliptical major axis section of the gripping section is 30-60 degrees with the reference plane.

22. The positioning device according to claim 21, characterized in that The elliptical major axis section of the gripping section is at 45° to the reference plane.

23. The positioning device according to claim 1, characterized in that The clamping ring is divided into a vertical section and a tapered section, and the outer peripheral annular surface of the vertical section is a circular annular surface with a constant diameter.

24. The positioning device according to claim 23, characterized in that The diameter of the outer peripheral annular surface of the tapered section gradually decreases from top to bottom.

25. The positioning device according to claim 23, characterized in that The clamping ring is fixed on the outer peripheral annular surface of the vertical section.

26. The positioning device according to claim 20, characterized in that The gripping section is provided with a wing plate.

27. The positioning device according to claim 26, characterized in that The wing plate is a protruding structure formed by extending outward along the major axis direction of the elliptical cross section of the gripping section.

28. The positioning device according to claim 26, characterized in that The cross section of the wing plate is parallel to the elliptical major axis cross section of the grip section.

29. The positioning device according to claim 26, characterized in that The wing plate is a flat plate with a thick center and thin edges.

30. The positioning device according to claim 26, characterized in that The wing plate is circular or elliptical.

31. The positioning device according to claim 30, characterized in that The wing plate is circular, and the diameter of the wing plate is 20-40 mm.

32. The positioning device according to claim 29, characterized in that The thickness of the wing plate at the center is 2 to 5 mm.

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