Bone Augmentation Kit

Abstract

The bone augmentation kit disclosed in the present invention is used to increase the bone volume of the jawbone. It can only use the combination of bone augmentation bracket + implantation bone screw, which is suitable for small-scale bone defects. It can also use the method of bone augmentation bracket + implantation bone screw + periosteal retention nail, which is used for large-scale irregular bone defects, and the implantation site can be adjusted at multiple angles to adapt to different defect areas. The implantation bone screw includes: a connecting part, a bone screw head connected to the top of the connecting part, and a threaded part connected to the bottom of the connecting part; the upper part of the implantation bone screw is provided with a periosteal retention nail installation hole extending from the bone screw head to the connecting part; when the combination of bone augmentation bracket + implantation bone screw + periosteal retention nail is used, the threaded part is screwed into the patient's jawbone, and the bone augmentation bracket is sleeved on the outside of the connecting part; bone powder is arranged around the bone augmentation bracket or between two bone augmentation brackets, and the periosteum covers the surface of the bone augmentation bracket, the implantation bone screw and the bone powder; the periosteal retention nail penetrates the periosteum and is installed in the periosteal retention nail installation hole.

Description

Technical Field

[0001] The invention relates to the technical field of dental implantation, and in particular to a bone augmentation kit for increasing bone volume. Background Art

[0002] Clinically, patients have insufficient bone quality and bone mass in the jaw, which seriously affects the morphology and function of the maxillofacial region, and even make it impossible to undergo dental implantation. Bone augmentation technology can effectively restore bone mass, and is therefore widely used in clinical practice. The most commonly used technique is guided bone regeneration (GBR), which is to place bone grafting materials in the bone defect area and cover the bone defect area with a biological barrier membrane (periosteum), thereby blocking the growth of fibrous tissue into the bone defect area and providing a suitable space for the growth of bone tissue. However, this technique also has disadvantages: 1. The use of autologous bone transplantation to the bone defect area is traumatic and has high operating costs; 2. During and after the GBR operation, the periosteum covering the surface of the autologous bone block is prone to displacement, and the bone grafting materials cannot be effectively fixed, affecting the effect of bone augmentation. Therefore, how to replace autologous bone transplantation and better achieve bone regeneration is an urgent problem to be solved. The present invention intends to effectively solve the problems of autologous bone replacement and periosteum displacement through a uniquely designed bone augmentation kit.

[0003] In the applicant's previous bone augmentation kit design (invention name: A repair system and instrument kit for vertical bone augmentation, application number: 202010896498.X), two parallel pillars are provided at the bottom of the porous bone augmentation bracket, which is mainly suitable for relatively regular bone defect areas with a certain buccal and lingual thickness.

[0004] Currently, there is still a need to provide a bone augmentation kit that can adjust the implantation site at multiple angles and is suitable for large or irregular bone defects. Summary of the invention

[0005] The first object of the present invention is to provide a bone augmentation kit which can adjust the implantation site at multiple angles and is suitable for large-scale irregular bone defects.

[0006] In order to achieve the above-mentioned object, the present invention provides a bone augmentation kit, which is used in conjunction with bone powder and periosteum; the bone augmentation kit comprises: a plurality of implant bone screws, a porous bone augmentation bracket, and a periosteal retention nail; a mounting through hole is provided in the middle of the bone augmentation bracket; the implant bone screw comprises: a connecting portion adapted to the mounting through hole, a bone screw head connected to the top end of the connecting portion, and a threaded portion connected to the bottom end of the connecting portion; a periosteal retention nail mounting hole extending from the bone screw head to the connecting portion is provided on the upper portion of the implant bone screw; in a state of use, after the bone augmentation bracket is fixed in a bone defect area, the threaded portion is inserted into the bracket mounting through hole and screwed into the patient's jawbone, so that the bone augmentation bracket is sleeved on the outer side of the connecting portion; the bone powder is arranged around the bone augmentation bracket or between two bone augmentation brackets, and the periosteum covers the surface of the bone augmentation bracket, the implant bone screw and the bone powder; the periosteal retention nail penetrates the periosteum and is installed in the periosteal retention nail mounting hole.

[0007] Preferably, the upper side wall of the mounting through hole is an inclined surface that slopes outward from bottom to top, so that it can better fit the head of the implant bone screw.

[0008] Preferably, the bone augmentation scaffold has a pore size of 200-500 μm and a porosity of 30%-50%.

[0009] Preferably, the bone augmentation scaffold is in the shape of a cylinder, a cone, or a polygonal prism.

[0010] Preferably, the bone augmentation scaffold has a height of 3-10 mm and a width of 4-8 mm.

[0011] Preferably, the implant bone screw has a length of 5 mm to 12 mm, a length of the threaded portion of 2 mm to 12 mm, and a diameter of 1 mm to 3 mm.

[0012] Preferably, the pitch of the threaded portion is 0.8 mm-1.2 mm, and the thread depth is 0.2 mm-0.4 mm.

[0013] Preferably, the top of the periosteal retention nail is flat.

[0014] Preferably, the upper portion of the periosteal retention nail installation hole is an inclined surface that inclines outward from bottom to top.

[0015] The second object of the present invention is to provide a bone augmentation kit suitable for irregular bone defects. The kit is composed of the above-mentioned implant bone screws and a porous bone augmentation bracket, is suitable for small-scale bone defects, and can be implanted in the patient's jaw at multiple angles.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] (1) Compared with the existing bone augmentation kit, the kit designed by the present invention can not only restore the vertical bone height, but also is suitable for use in irregular bone defect areas. By adjusting the implantation angle and position of the bone augmentation scaffold, the bone volume at different angles can be restored.

[0018] (2) In order to avoid displacement of the upper periosteum, the present invention is designed with a periosteum retaining nail, and the periosteum can be well-designed by means of a trumpet-shaped structure to retain the periosteum.

[0019] (3) The kit is easy to use, has lower cost than simply using bone meal, and is less invasive.

[0020] (4) It has multiple functions. It can be used with only a combination of bone augmentation scaffold + implant bone screws, which is suitable for small bone defects; it can also be used with a combination of bone augmentation scaffold + implant bone screws + periosteal retention screws, which is suitable for large and irregular bone defects. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A cross-sectional view of the first bone augmentation kit provided by the present invention in use.

[0022] Figure 2 This is a stereoscopic diagram of the second bone augmentation kit provided by the present invention in use.

[0023] Figure 3 This is a schematic diagram after the bone augmentation kit of Example 1 is implanted.

[0024] Figure 4 This is a top view after the bone augmentation kit of Example 2 is implanted.

[0025] Figure 5 This is a schematic diagram after the bone augmentation kit of Example 3 is implanted.

[0026] Figure 6 A top view of an implant bone screw in some embodiments. DETAILED DESCRIPTION

[0027] The technical solution of the present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0028] In the description of the present invention, the orientations or positional relationships indicated by terms such as "middle", "top", "bottom", "upper", and "lower" are based on the orientations or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present invention and simplifying the description. They do not indicate or imply that the elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0029] like Figure 1 FIG. 2 is a cross-sectional view of a bone augmentation kit of the present invention in use. Figure 1The bone augmentation kit shown is used in conjunction with bone powder (not shown) and periosteum 40. The bone augmentation kit includes: a plurality of implant bone screws 30, a porous bone augmentation bracket 20, and a periosteal fixation nail 10. A mounting through hole is provided in the middle of the bone augmentation bracket 20. The implant bone screw 30 includes: a connecting portion 32 adapted to the mounting through hole, a bone screw head 31 connected to the top of the connecting portion 32, and a threaded portion 33 connected to the bottom of the connecting portion 32. A periosteal fixation nail mounting hole 35 extending from the bone screw head 31 to the connecting portion 32 is provided on the upper portion of the implant bone screw 30 (see FIG. 1 ). Figure 2 In the use state, the threaded portion 33 is screwed into the patient's jawbone, the bone augmentation bracket 20 is sleeved on the outside of the connecting portion 32; the bone powder is arranged around the bone augmentation bracket 20 or between two bone augmentation brackets 20, the periosteum 40 covers the surface of the bone augmentation bracket 20, the implanted bone screw 30 and the bone powder; the periosteal retention nail 10 penetrates the periosteum 40 and is installed in the periosteal retention nail installation hole 35.

[0030] Figure 1 The bone augmentation kit shown is suitable for use when the bone defect is large. When the defect is large, bone powder needs to be implanted to obtain a good bone regeneration effect, and the bone powder implanted with the periosteum 40 is retained. Bone powder is a material that helps bone formation around the implant, because the implant is implanted in the bone and a certain amount of bone is required. Bone powder can be artificially synthesized or formed through special treatment of allogeneic bone. The periosteum 40 is placed between the gingival soft tissue and the bone defect to establish an artificial biological barrier to prevent fibroblasts and epithelial cells with faster growth and migration speed from growing into the bone defect area, creating a relatively closed environment to ensure that the bone formation process is not disturbed. Bone powder can be placed around the bone augmentation bracket 20 or between two bone augmentation brackets 20, and the bone augmentation bracket 20 is used to further limit the bone powder area to avoid displacement and collapse of traditional bone powder implantation. Adjusting the distance between the two bone augmentation brackets 20 can be adapted to cases of bone defects of different length ranges.

[0031] also, Figure 1 The bone augmentation kit shown is also suitable for use in irregular bone defect areas. The bone augmentation scaffold 20 is fixed by a single implant bone screw 30, and is more suitable for use in irregular bone defect areas than existing scaffolds with two parallel struts.

[0032] The bone augmentation scaffold 20 is a porous three-dimensional mesh structure. The mesh bone graft material is similar to the extracellular matrix, providing a good microenvironment for the migration of surrounding cells, indirect cell contact and differentiation, and providing structural support for the surrounding regenerated tissue to penetrate the damaged site. In some embodiments, the porous bone augmentation scaffold 20 has a pore size of 200-500 μm and a porosity of 30%-50%, thereby ensuring the growth of bone cells and the entry of nutrients, accelerating the bone integration process, and making the regenerated bone and the material more firmly combined.

[0033] Preferably, the porous bone augmentation scaffold 20 can be a cylinder, a cone, or a polygonal prism. Size setting: The bone augmentation scaffold 20 has a height of about 3-10 mm and a width of about 4-8 mm.

[0034] In some embodiments, the side wall of the upper opening of the installation through hole is set as an inclined surface that tilts outward from bottom to top. The inclination angle is about 10-30 degrees. The connecting portion 32 of the implant bone screw 30 is adapted to the installation through hole, so the upper portion of the connecting portion 32 is also an inclined surface. The inclined surface design can increase the contact area between the implant bone screw 30 and the material, increase the friction force, and make the implant bone screw 30 and the bone augmentation bracket 20 in close contact.

[0035] The bone augmentation scaffold 20 is preferably made of degradable materials, such as calcium / phosphorus inorganic materials, organic polymer materials, natural biomaterials, magnesium alloys and other degradable metal materials. The bone augmentation scaffold 20 has degradable properties and can avoid secondary surgery for removal.

[0036] The implant bone screw 30 of the present invention is divided into a bone screw head 31, a connecting portion 32, and a threaded portion 33. The outer diameter of the bone screw head 31 is larger than the connecting portion 32. The threaded portion 33 is a self-tapping screw, which is implanted in the jawbone to fix the bone augmentation bracket 20. After the threaded portion 33 passes through the mounting through hole of the bone augmentation bracket 20 and is implanted in the jawbone, the connecting portion 32 is located in the mounting through hole; the bone screw head 31 is exposed outside the bone augmentation bracket 20 to press the bone augmentation bracket 20.

[0037] The bottom of the threaded portion 33 is conical, and in some embodiments, the taper is 6°. The total length of the threaded portion 33 is about 2-12 mm, and the diameter is 1-3 mm. The surface of the threaded portion 33 is threaded, and in some embodiments, the pitch of the thread is 0.8 mm-1.2 mm, and the depth of the thread is 0.2 mm-0.4 mm. The material can be titanium metal, magnesium alloy, PEEK, bioceramics and other materials with excellent biocompatibility.

[0038] Figure 1 In the illustrated embodiment, in order to facilitate the installation of the implant bone screw 30, a mounting pattern 34 is provided at the bottom of the periosteal retention screw installation hole 35. The mounting pattern 34 can be set to a cross, triangle, square, hexagon or other forms. Figure 6 A top view of the bottom pattern of the periosteal fixation installation hole in some embodiments is shown. The threaded portion 33 is screwed into the jawbone by screwing a matching tool into the periosteal fixation screw installation hole 35 and the tool is engaged with the installation pattern 34. The installation method of the implant bone screw 30 is not limited to Figure 1 The method shown.

[0039] The periosteal retention nail 10 can effectively solve the problem of displacement of the periosteal 40. In some embodiments, a cross pattern is provided on the top of the periosteal retention nail 10 (see Figure 3), when used, it is installed and fixed to the upper part of the implant bone screw 30 through a cross pattern. The pattern can also be triangular, square, hexagonal or other forms. In some embodiments, the top of the periosteal retention nail 10 is a plane with a top height of 2-4mm and a diameter of 2-3mm. The cross pattern is arranged in the middle of the plane for easy loading and unloading. The lower part of the periosteal retention nail 10 is the nail part of the periosteal retention nail 10, with a nail part height of 2-4mm and a diameter of 1-2mm. The periosteal retention nail 10 can be installed in the periosteal retention nail installation hole 35 by threaded connection or other detachable methods.

[0040] Please continue reading Figure 1 In some embodiments, the upper end of the nail portion of the periosteal retention nail 10 is designed to be flared, and the shape of the periosteal retention nail installation hole 35 is adapted to the nail portion. The inclined surface of the periosteal retention nail 10 and the periosteal retention nail installation hole 35 is designed to well clip the periosteum 40.

[0041] In some embodiments, the bone augmentation kit is provided with a matching screwdriver, which can screw the periosteal retention nail 10 into and out of the periosteal retention nail installation hole 35; and the screwdriver can match the periosteal retention nail installation hole 35, and is used to screw the implant bone screw into and out of the jawbone. The screwdriver is a combination type, and two types of screwdrivers are provided, which are respectively adapted to the cross pattern on the top of the periosteal retention nail 10 and the bottom pattern of the periosteal retention nail installation hole 35. When using, only the screwdriver needs to be replaced, which is easy to operate.

[0042] like Figure 2 As shown, the present invention further provides a bone augmentation kit, which is composed of the above-mentioned implant bone screw 30 and the bone augmentation bracket 20, and is suitable for use when the bone defect range is small. The combination of the bone augmentation bracket 20 + the implant bone screw 30 can adjust the implantation site at multiple angles to adapt to different defect areas. The combination of the bone augmentation bracket 20 + the implant bone screw 30, and the combination of the bone augmentation bracket 20 + the implant bone screw 30 + the periosteal retention nail 10 realize the multifunctional use of a set of devices. Figure 2 In the embodiment shown, the top surface of the bone nail head 31 is substantially flush with the top surface of the bone augmentation bracket 20. Since bone powder and periosteum 40 are not needed to assist in osteogenesis when the bone defect is small, no periosteal nail 10 is installed in the periosteal nail installation hole 35.

[0043] Example 1

[0044] The bone augmentation kit of this embodiment is used in conjunction with bone powder and periosteum 40. When the defect is large, bone powder needs to be implanted to obtain a good bone regeneration effect. In this case, the bone powder needs to be implanted in conjunction with the periosteum 40 for retention. Figure 3 The figure is a schematic diagram of the bone augmentation kit of this embodiment after implantation. Figure 1 and Figure 3The bone augmentation kit includes: 2 implant bone screws 30, 2 porous bone augmentation brackets 20, and 2 periosteal retaining screws 10. After the implant bone screw 30 passes through the installation through hole of the bone augmentation bracket 20, the threaded portion 33 is screwed into the patient's jawbone, and the bone augmentation bracket 20 is sleeved on the outside of the connecting portion 32. According to the range of the bone defect, the different angles of placement of the bone augmentation bracket 20 can be adjusted. Bone powder is placed between the two bone augmentation brackets 20, covering the periosteum 40. The periosteal retaining screw 10 penetrates the periosteum 40 and is installed in the periosteal retaining screw installation hole 35. After the implantation is completed, the top of the periosteal retaining screw 10 is exposed outside the periosteum 40.

[0045] Example 2

[0046] When the defect range is small, only the combination of the porous bone augmentation bracket 20 and the implantation bone screw 30 is needed. The bone augmentation kit of this embodiment is composed of the implantation bone screw 30 and the bone augmentation bracket 20. Figure 4 The top view of the bone augmentation kit of this embodiment after implantation. The bone augmentation kit is vertically implanted into the patient's jawbone. The periosteal retention nail 10 does not need to be installed in the periosteal retention nail installation hole 35.

[0047] Example 3

[0048] The combination of the bone augmentation bracket 20, the implanted bone screw 30, and the periosteal fixation screw 10 can adjust the implantation position at multiple angles to adapt to different defect areas. Figure 5 Schematic diagram of the bone augmentation kit after implantation of the present embodiment. Different from the embodiment 1, the bone augmentation kit is implanted laterally into the patient's jawbone.

[0049] In summary, the bone augmentation kit designed in the present invention has multiple functions. It can be used only with a combination of a bone augmentation scaffold + implanted bone screws, which is suitable for small-scale bone defects. It can also be used with a combination of a bone augmentation scaffold + implanted bone screws + periosteal retention screws, which is suitable for large-scale irregular bone defects. The implantation site can be adjusted at multiple angles to adapt to different defect areas.

[0050] Although the content of the present invention has been described in detail through the above preferred embodiments, it should be appreciated that the above description should not be considered as a limitation of the present invention. After reading the above content, it will be apparent to those skilled in the art that various modifications and substitutions of the present invention will occur. Therefore, the protection scope of the present invention should be limited by the appended claims.

Claims

1. A bone augmentation kit, characterized in that: The bone augmentation kit is used in conjunction with bone powder and periosteum; the bone augmentation kit comprises: a plurality of implant bone screws, a porous bone augmentation scaffold, and a periosteal retention screw; A mounting through hole is provided in the middle of the bone augmentation support; The implant bone screw comprises: a connecting portion adapted to the mounting through hole, a bone screw head connected to the top end of the connecting portion, and a threaded portion connected to the bottom end of the connecting portion; a periosteal retention screw mounting hole extending from the bone screw head to the connecting portion is provided on the upper portion of the implant bone screw; the top surface of the bone screw head is flush with the top surface of the bone augmentation bracket; In a use state, the threaded portion is screwed into the patient's jawbone, the bone augmentation bracket is sleeved on the outside of the connecting portion; the bone powder is arranged around the bone augmentation bracket or between two bone augmentation brackets, and the periosteum covers the bone augmentation bracket, the implanted bone screw and the surface of the bone powder; the periosteal retention nail penetrates the periosteum and is installed in the periosteal retention nail installation hole; the upper part of the periosteal retention nail installation hole is an inclined surface that tilts outward from bottom to top; the upper end of the nail part of the periosteal retention nail is set to be trumpet-shaped, and the shape of the periosteal retention nail installation hole is adapted to the nail part for buckling the periosteum.

2. The bone augmentation kit according to claim 1, characterized in that: The upper side wall of the mounting through hole is a slope that slopes outward from bottom to top.

3. The bone augmentation kit according to claim 1, characterized in that: The bone augmentation scaffold has a pore size of 200-500 μm and a porosity of 30%-50%.

4. The bone augmentation kit according to claim 1, characterized in that: The bone augmentation scaffold is in the shape of a cylinder, a cone, or a polygonal prism.

5. The bone augmentation kit according to claim 1, characterized in that: The bone augmentation scaffold has a height of 3-10 mm and a width of 4-8 mm.

6. The bone augmentation kit according to claim 1, characterized in that: The implant bone screw has a length of 5mm-12mm, a threaded portion length of 2-12mm, and a diameter of 1-3mm.

7. The bone augmentation kit according to claim 1, characterized in that: The thread pitch of the threaded portion is 0.8mm-1.2mm, and the thread depth is 0.2mm-0.4mm.

8. The bone augmentation kit according to claim 1, characterized in that: The top of the periosteal retention nail is a plane.

9. A bone augmentation kit, characterized in that: The bone augmentation kit is composed of the implant bone screw and the porous bone augmentation bracket in the bone augmentation kit according to any one of claims 1 to 8.

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