Bone nail fixing assembly

Abstract

The utility model provides a bone screw fixing assembly. The bone screw fixing assembly comprises a bone screw and an anti-skid sleeve with plasticity. The antiskid sleeve wraps the periphery of the bone screw; medicines are loaded on the anti-skid sleeve; the medicine is arranged in the anti-skid sleeve and / or on the outer surface of the anti-skid sleeve. After a fracture internal fixation operation / tooth implantation operation is carried out, the anti-skid sleeve can fill gaps between the bone screw and a bone and between the bone screw and a bone fracture plate, and the anti-skid effect can be achieved; the anti-skid sleeve loaded medicine can achieve the local medicine loading function, the healing rate can be greatly increased, and the treatment effect is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to a bone screw fixation assembly. Background Art

[0002] Fractures are common injuries of the skeletal musculoskeletal system. Common fracture treatment methods use fracture internal fixation systems to fix the fracture site through bone drilling, tapping, plate implantation, screw insertion and other surgical procedures on the basis of fracture reduction, so as to maintain and protect the biological integrity of the fracture, surrounding tissue structure and blood circulation as much as possible, and finally allow the fracture to heal. Commonly used fracture internal fixation systems, although specifically manifested in different contact states between bone screws and steel plates or steel plates and bones, are all composed of matching metal bone screws and bone plates (commonly known as steel plates).

[0003] Denture implants are one of the conventional treatments for patients with edentulous and edentulous teeth, which promotes the recovery of the oral and maxillofacial system function. The success rate of implant placement is high. Studies have shown that after 3-7 years of loading, the cumulative success rate of implants in patients with edentulous teeth is 95.3%. However, in the long run, complications of implants are still prone to occur. With the increasing application of implant restorations in clinical practice, complications after implant loading have gradually appeared in clinical practice, such as loosening and fracture of abutment screws, implant fracture, etc.

[0004] Bone screw loosening is one of the common failure modes in orthopedic internal fixation and dental implant surgery. The mechanism of loosening is bone absorption caused by high radial stress. The bone screw loosening rate is higher in patients with osteoporotic fractures. In addition, bone screws only have mechanical fixation function, passively waiting for bone tissue / bone cells to grow and heal, and cannot actively regulate the fracture healing cycle and progress. The treatment cycle is long, the progress is slow, and there is a high risk of complications. Summary of the invention

[0005] In order to overcome the problems existing in the related art, the present invention provides a bone screw fixation assembly to improve the stability of the internal fixation screw / dental implant after fracture surgery, and improve the success rate of fracture internal fixation / dental implant surgery and the postoperative healing efficiency.

[0006] The object of the present invention is to provide a bone screw fixation assembly, characterized in that:

[0007] It includes a bone screw and a plastic anti-slip sleeve;

[0008] The anti-slip sleeve is wrapped around the periphery of the bone screw;

[0009] The anti-slip sleeve is loaded with medicine;

[0010] The medicine is arranged inside and / or on the outer surface of the anti-slip sleeve.

[0011] In a preferred technical solution of the present invention, the bone screw includes a nut portion, a screw portion, and an end blade portion coaxially arranged in sequence, the screw portion includes a non-threaded section and a threaded section arranged in sequence, the non-threaded section is connected to the nut portion, the threaded section is connected to the blade portion, and the threaded section is spirally arranged with a spiral blade on the outer periphery.

[0012] In a preferred technical solution of the present invention, the type of the bone screw is one of an intramedullary nail, a compression screw, a lag screw, a Hubble screw, a dental implant, a hammer toe hollow screw, and a tarsal sinus screw.

[0013] In a preferred technical solution of the present invention, the anti-slip sleeve is a mesh sleeve, and the anti-slip sleeve is interference fit with the bone screw.

[0014] In a preferred technical solution of the present invention, the anti-slip sleeve is formed by winding at least one fiber.

[0015] In a preferred technical solution of the present invention, the diameter of the fiber is 2-1000um.

[0016] In a preferred technical solution of the present invention, the winding angle of the fiber is 0-90°.

[0017] In a preferred technical solution of the present invention, the drug is impregnated in the fiber.

[0018] In a preferred technical solution of the present invention, the fiber is sprayed or coated on the outer surface of the fiber to form a drug layer.

[0019] In a preferred technical solution of the present invention, the anti-slip cover is made of a human body degradable material or a non-degradable material.

[0020] The beneficial effects of the present invention are:

[0021] It can improve the stability of internal fixation screws / tooth implants after fracture surgery, and improve the success rate of fracture internal fixation / tooth implant surgery and the efficiency of postoperative healing;

[0022] After fracture internal fixation surgery / dental implant surgery, the anti-slip sleeve can fill the gap between the bone screw and the bone, the bone screw and the bone plate, and play an anti-slip role;

[0023] The anti-slip sleeve loaded with drugs can realize the local drug loading function, which can greatly promote the healing rate and improve the treatment effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 A schematic diagram of the structure of the fixed component.

[0025] Figure 2 Schematic diagram of the structure of a bone screw.

[0026] Figure 3 Schematic diagram of single screw internal fixation of fracture.

[0027] Figure 4 Schematic diagram of internal fixation surgery using screws and plates.

[0028] Figure 5 Schematic diagram of dental implants.

[0029] Reference numerals:

[0030] 1. Bone screw; 101. Nut portion; 102. Non-threaded section; 103. Threaded section; 104. End blade; 105. Spiral blade; 2. Anti-slip sleeve; 3. Cross section of fracture site; 4. Bone plate; 5. Fracture site; 6. Alveolar bone. DETAILED DESCRIPTION

[0031] The preferred embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although the preferred embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided to make the present invention more thorough and complete, and to fully convey the scope of the present invention to those skilled in the art.

[0032] The terms used in the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The singular forms "a", "the" and "the" used in the present invention and the appended claims are also intended to include plural forms unless the context clearly indicates other meanings. It should also be understood that the term "and / or" used herein refers to and includes any or all possible combinations of one or more associated listed items.

[0033] It should be understood that although the terms "first", "second", "third", etc. may be used to describe various information in the present invention, such information should not be limited to these terms. These terms are only used to distinguish the same type of information from each other. For example, without departing from the scope of the present invention, the first information may also be referred to as information, and similarly, information may also be referred to as first information. Thus, features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, "multiple" means two or more, unless otherwise clearly and specifically defined.

[0034] like Figure 1-2 As shown, a bone screw fixation assembly:

[0035] It includes a bone screw 1 and a plastic anti-slip sleeve 2;

[0036] The anti-slip sleeve 2 is wrapped around the outer periphery of the bone screw 1;

[0037] The anti-slip cover 2 is loaded with medicine;

[0038] The medicine is arranged inside and / or on the outer surface of the anti-slip sleeve 2 .

[0039] A bone screw fixation method:

[0040] It is suitable for fracture internal fixation surgery / dental implant surgery, and is fixed by a fixation assembly, the fixation assembly includes a bone screw 1 and a plastic anti-slip sleeve 2, the anti-slip sleeve 2 is wrapped around the periphery of the bone screw 1, and the anti-slip sleeve 2 is loaded with drugs, and the drugs are arranged inside and / or on the outer surface of the anti-slip sleeve 1;

[0041] The following steps are involved:

[0042] S1: Frame the treatment area and determine the type and size of the matching bone screw 1;

[0043] S2: Determine the size of the anti-slip sleeve 2 according to the type and size of the bone screw 1;

[0044] S3: preparing an anti-slip cover 2;

[0045] S4: loading medicine on the anti-slip cover 2;

[0046] S5: Put the anti-slip cover 2 on the bone screw 1 so that the anti-slip cover 2 wraps the bone screw 1; because the anti-slip cover 2 has a certain amount of plastic, during assembly, the anti-slip cover 2 is opened, and then the bone screw 1 is placed in the anti-slip cover 2. After the assembly is completed, the anti-slip cover 2 will be tightly wrapped around the surface of the bone screw;

[0047] S6: Implant the bone screw 1 into the bone of the treatment area of ​​the human body.

[0048] The bone screw fixation method can improve the stability of the internal fixation screw / tooth implant after fracture surgery, and improve the success rate of fracture internal fixation / tooth implant surgery and the efficiency of postoperative healing.

[0049] After the bone screw fixation method is performed on a fracture internal fixation surgery / a dental implant surgery, the anti-slip sleeve can fill the gap between the bone screw and the bone, and between the bone screw and the bone plate, thereby playing an anti-slip role.

[0050] The bone screw fixation method can realize the local drug loading function by loading the drug on the anti-slip sleeve, which can greatly promote the healing rate and improve the treatment effect.

[0051] In this embodiment, before step S1, the type of surgery needs to be determined;

[0052] The types of surgeries described include fracture fixation and dental implants;

[0053] If the type of surgery is internal fixation of fractures, it is necessary to determine whether a bone plate 4 is needed and to determine the size of the matching bone plate 4.

[0054] In this embodiment, the type of the bone screw 1 is one of an intramedullary nail, a compression screw, a lag screw, a Hubble screw, a dental implant, a hammer toe hollow screw, and a tarsal sinus screw.

[0055] In this embodiment, the bone screw 1 includes a nut portion 101, a screw portion, and an end blade portion 104 that are coaxially arranged in sequence. The screw portion includes a non-threaded section 102 and a threaded section 103 that are arranged in sequence. The non-threaded section 102 is connected to the nut portion 101, and the threaded section 103 is connected to the blade portion. The threaded section 103 is spirally arranged with a spiral blade 105 on the outer periphery.

[0056] In practical applications, the material of the bone screw 1 includes but is not limited to titanium alloy and cobalt alloy.

[0057] In this embodiment, the anti-slip sleeve 2 is a mesh sleeve, and the anti-slip sleeve 2 and the bone screw 1 are interference fit.

[0058] In practical applications, the shape of the anti-slip sleeve 2 is adapted to the shape of the screw portion.

[0059] In this embodiment, the anti-slip sleeve 2 is formed by winding at least one fiber, and the fiber is impregnated with medicine or the outer surface of the fiber is sprayed or coated with medicine to form a medicine layer.

[0060] In this embodiment, the diameter of the fiber is 2-1000 um.

[0061] In this embodiment, the winding angle of the fiber is 0-90°.

[0062] In this embodiment, the molding pattern of the fibers on the anti-slip cover 2 is a mesh pattern, a honeycomb pattern, a spiral pattern or a random pattern.

[0063] In this embodiment, the anti-slip cover 2 is prepared by one of electrospinning, extrusion 3D printing and light-curing 3D printing.

[0064] In this embodiment, the material of the anti-slip cover 2 can be selected from human body degradable materials or non-degradable materials according to the treatment plan.

[0065] In practical applications, the material of the anti-slip sleeve 2 includes but is not limited to Ta (tantalum), Mg (magnesium) and its alloys, PCL (polycaprolactone), PLA (polylactic acid), PHA (polyhydroxyalkanoate), PBS (polybutylene succinate), PEEK (polyetheretherketone) and a combination of one or more thereof.

[0066] In practical applications, the anti-slip sleeve can be made of biodegradable materials, which can be gradually degraded as the bone at the fracture site grows, without the need for secondary surgery, so that the bone screws can always maintain a stable environment, greatly reducing the internal fixation failure caused by the loosening of the bone screws / tooth implants, improving the effect of internal fixation, promoting the healing rate, improving the stability of the bone screws / tooth implants after implantation, and reducing the risk of complications;

[0067] In practical applications, the anti-slip sleeve can be made of non-metallic materials, has good axial flexibility and good fit, and can effectively reduce possible damage to the fracture site after implantation.

[0068] In this embodiment, the method of loading the medicine on the anti-slip cover 2 is one of dipping, coating and spraying.

[0069] In practical applications, the loaded drugs are some stability-promoting components, including but not limited to bone-promoting components, growth-promoting factors, phenolic drugs, iodine drugs, and root canal filling drugs.

[0070] Application Example 1:

[0071] Single screw internal fixation of fractures:

[0072] like Figure 3 As shown, the operation process is:

[0073] S1: Framing the fracture treatment area ( Figure 3 The fracture site cross section 3) is shown to determine the type and size of the matching bone screw 1;

[0074] S2: Determine the size and fiber diameter of the anti-slip sleeve 2 according to the type and size of the bone screw 1;

[0075] S3: preparing the anti-slip cover 2 by electrospinning technology;

[0076] S4: Dipping the anti-slip cover 2 into the medicine prepared in advance;

[0077] S5: Put the anti-slip sleeve 2 on the bone screw 1 so that the anti-slip sleeve 2 wraps the bone screw 1;

[0078] S6: Implant the bone screw 1 into the bone of the treatment area of ​​the human body.

[0079] In this embodiment, the bone screw 1 is made of titanium alloy, and the major diameter of the thread is 6 mm.

[0080] In this embodiment, the anti-slip cover 2 is made of PLA (polylactic acid) and has a diameter of 6.5 mm.

[0081] In this embodiment, the diameter of the fiber is 30 um, the molding pattern is cross, and the fiber molding angle is 75°.

[0082] In this embodiment, the drug is parathyroid hormone solution (bone promoting component).

[0083] Application Example 2:

[0084] Screws and plate 4 in combination with internal fixation surgery:

[0085] like Figure 4 As shown, the operation process is as follows:

[0086] S1: Frame the fracture treatment area (fracture site 5), determine the type and size of the matching bone screw 1, and the size of the bone plate 4;

[0087] S2: Determine the size and fiber diameter of the anti-slip sleeve 2 according to the type and size of the bone screw 1;

[0088] S3: preparing the anti-slip cover 2 by electrospinning technology;

[0089] S4: Dipping the anti-slip cover 2 into the medicine prepared in advance;

[0090] S5: Put the anti-slip sleeve 2 on the bone screw 1 so that the anti-slip sleeve 2 wraps the bone screw 1;

[0091] S6: Implant the bone screw 1 and the bone plate 4 into the bone at the fracture site 5.

[0092] In this embodiment, the bone screw 1 and the bone plate 4 are made of titanium alloy, and the major diameter of the thread of the bone screw 1 is 6 mm.

[0093] In this embodiment, the anti-slip sleeve 2 is made of PCL (polycaprolactone) and has a diameter of 8.5 mm.

[0094] In this embodiment, the diameter of the fiber is 20 um, the molding pattern is cross, and the fiber molding angle is 60°.

[0095] In this embodiment, the drug is a zoledronate solution (bone promoting component) mixed with stem cells.

[0096] Application Example 3:

[0097] Dental Implant Surgery:

[0098] like Figure 5 As shown, the operation process is:

[0099] S1: Frame the tooth implant area and determine the size of the matching bone screw 1;

[0100] S2: Determine the size and fiber diameter of the anti-slip sleeve 2 according to the type and size of the bone screw 1;

[0101] S3: preparing the anti-slip cover 2 by electrospinning technology;

[0102] S4: Dipping the anti-slip cover 2 into the medicine prepared in advance;

[0103] S5: Put the anti-slip sleeve 2 on the bone screw 1 so that the anti-slip sleeve 2 wraps the bone screw 1;

[0104] S6: Implant the bone screw 1 into the alveolar bone 6.

[0105] In this embodiment, the bone screw 1 is made of titanium-zirconium alloy, and the major diameter of the thread of the bone screw 1 is 3.3 mm.

[0106] In this embodiment, the anti-slip cover 2 is made of a mixture of PCL (polycaprolactone) and PLA (polylactic acid) and has a diameter of 3.5 mm.

[0107] In this embodiment, the diameter of the fiber is 10 um, the molding pattern is cross, and the fiber molding angle is 45°.

[0108] In this embodiment, the drug is Vitapex (root canal filling drug).

[0109] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values ​​of the parts and steps set forth in these embodiments do not limit the scope of the application. Meanwhile, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to actual proportional relationships. The technology, methods and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be considered as a part of the specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, and therefore, once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0110] In the description of the present application, it should be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "horizontal, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction, and therefore cannot be understood as limiting the scope of protection of the present application; the directional words "inside and outside" refer to the inside and outside relative to the contour of each component itself.

[0111] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0112] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of this application.

[0113] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A bone screw fixation assembly, Features: It includes a bone screw and a plastic anti-slip sleeve; The anti-slip sleeve is wrapped around the periphery of the bone screw; The anti-slip sleeve is loaded with medicine; The medicine is arranged inside and / or on the outer surface of the anti-slip sleeve; the bone screw includes a nut portion, a screw portion, and an end blade portion which are coaxially arranged in sequence, the screw portion includes a non-threaded section and a threaded section which are arranged in sequence, the non-threaded section is connected to the nut portion, the threaded section is connected to the blade portion, and a spiral blade is spirally arranged on the outer periphery of the threaded section.

2. The bone screw fixation assembly according to claim 1, Features: The type of the bone screw is one of an intramedullary nail, a compression screw, a lag screw, a Hubble screw, a dental implant, a hammer toe hollow screw, and a tarsal sinus screw.

3. The bone screw fixation assembly according to claim 1, Features: The anti-slip sleeve is a mesh sleeve, and the anti-slip sleeve is interference-fitted with the bone screw.

4. The bone screw fixation assembly according to claim 3, Features: The anti-slip cover is formed by winding at least one fiber.

5. The bone screw fixation assembly according to claim 4, Features: The diameter of the fiber is 2-1000um.

6. The bone screw fixation assembly according to claim 4, Features: The winding angle of the fibers is 0-90°.

7. The bone screw fixation assembly according to claim 3, Features: The drug is impregnated within the fibers.

8. The bone screw fixation assembly according to claim 4, Features: The fiber is sprayed or coated on the outer surface of the fiber to form a drug layer.

9. The bone screw fixation assembly according to claim 1, Features: The material of the anti-slip cover is a human body degradable material or a non-degradable material.

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