A special retaining nail assembly for alveolar bone augmentation

Abstract

The present invention relates to the technical field of medical devices, and in particular to a special retaining nail assembly for alveolar bone augmentation, comprising a retaining rod, a threaded portion being provided on the autologous alveolar bone contacting side of the retaining rod; a first retaining piece being provided on the side of the retaining rod away from the threaded portion; an umbrella-shaped connecting portion being provided with a hollow slot body, the extension direction of the slot body being consistent with the axial direction of the retaining rod; a partition being provided perpendicularly to the extension direction of the slot body, the partition body dividing the slot body into a first groove and a second groove; the first retaining piece being matched with the first groove; a matching nail being provided, the matching nail comprising a connected cap body portion and a second retaining piece; the second retaining piece being matched with the second groove. The present invention is used to fix autologous bone blocks and allogeneic bone blocks, and can also be used to stabilize artificial bone powder, so as to solve the problem that the prior art cannot effectively maintain a stable bone grafting space.

Description

Technical Field

[0001] The invention relates to the technical field of medical devices, and in particular to a special retaining nail assembly for alveolar bone augmentation. Background Art

[0002] Currently, dental implants have become the preferred method of restoration for patients with missing alveolar bone. Sufficient bone volume plays an important role in the long-term prognosis of dental implant surgery. However, in clinical practice, soft and hard tissue defects of the jaw are often caused by trauma, inflammation, tumor resection, congenital diseases and physiological factors, resulting in severe alveolar bone deficiency, which poses a challenge to dental implant restoration. Therefore, how to effectively increase alveolar bone volume, especially vertical bone volume, is a major clinical issue that implant doctors need to solve urgently.

[0003] There are many ways to increase alveolar bone. In addition to autologous bone transplantation, allogeneic bone blocks and artificial bone powder are commonly used in clinical practice, and have achieved good clinical results. However, no matter which bone implant method is chosen, the bone blocks or bone powder need to be stably fixed, which is conducive to the formation of new bone. However, there is a lack of effective fixation devices in clinical practice. Summary of the invention

[0004] In view of the above shortcomings of the prior art, the purpose of the present invention is to provide a special retention nail assembly for alveolar bone augmentation, which is used to fix autologous bone blocks and allogeneic bone blocks, and can also stabilize artificial bone powder to solve the problem that the prior art cannot effectively maintain a stable bone graft space.

[0005] To achieve the above-mentioned purpose and other related purposes, the present invention provides, on one hand, a special retaining nail assembly for alveolar bone augmentation, comprising a retaining rod, a threaded portion being provided on the autologous alveolar bone contacting side of the retaining rod; a first retaining piece being provided on the side of the retaining rod away from the threaded portion; an umbrella-shaped connecting portion being provided with a hollow groove body, the extending direction of the groove body being consistent with the axial direction of the retaining rod; a partition being provided inside the groove body perpendicular to the extending direction thereof, the partition dividing the groove body into a first groove and a second groove; the first retaining piece being matched with the first groove; a matching nail being further provided, the matching nail comprising a connected cap body portion and a second retaining piece; the second retaining piece being matched with the second groove.

[0006] In some embodiments of the present invention, the first retaining member is provided with an external thread, and the first groove is provided with an internal thread matching with the first retaining member.

[0007] In some embodiments of the present invention, the second retaining member is provided with an external thread, and the second groove is provided with an internal thread matching with the second retaining member.

[0008] In some embodiments of the present invention, the diameter of the umbrella-shaped connecting portion gradually increases from an end away from the retaining rod to an end close to the retaining rod.

[0009] In some embodiments of the present invention, the cross-sectional shape of the groove body is square or circular; the first retaining member and the second retaining member are square or circular matching the shape of the groove body.

[0010] In some embodiments of the present invention, the groove body is arranged at the center of the cross section of the umbrella-shaped connecting portion and extends in the axial direction of the umbrella-shaped connecting portion.

[0011] In some embodiments of the present invention, the partition divides the tank body into two halves.

[0012] In some embodiments of the present invention, the angle between the working surface of the thread in the threaded portion and the radial direction of the retaining rod is 10° to 30°.

[0013] In some embodiments of the present invention, the pitch of the threaded portion is 0.1 to 0.3 mm.

[0014] In some embodiments of the present invention, the length of the threaded portion is 3 to 5 mm.

[0015] In some embodiments of the present invention, the cap body is provided with a groove.

[0016] In some embodiments of the present invention, the length of the retention rod is 10 to 18 mm.

[0017] In some embodiments of the present invention, the diameter of the retention rod is 1 to 2 mm.

[0018] In some embodiments of the present invention, the diameter of the umbrella-shaped connecting portion is 3 to 5 mm.

[0019] In some embodiments of the present invention, the thickness of the umbrella-shaped connecting portion is 2 to 4 mm.

[0020] In some embodiments of the present invention, the side length of the groove body is 0.5-1.5 mm.

[0021] In some embodiments of the present invention, the thickness of the tank body is 2 to 4 mm.

[0022] In some embodiments of the present invention, the thickness of the separator is 0.5-1 mm.

[0023] In some embodiments of the present invention, the diameter of the cap body is 2 to 3 mm.

[0024] In some embodiments of the present invention, the thickness of the cap body is 1.5 to 2.5 mm.

[0025] In some embodiments of the present invention, the length of the nail is 3 to 5 mm. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the split structure of the special retaining screw assembly for alveolar bone augmentation of the present invention.

[0027] Figure 2 It is a schematic diagram of the main structure of the special retaining nail assembly for alveolar bone augmentation of the present invention.

[0028] Figure 3 It is a schematic structural diagram of the slotting in one embodiment of the special retaining screw assembly for alveolar bone augmentation of the present invention.

[0029] Component numbers in the figure:

[0030] 1 Retention rod

[0031] 11 Threaded part

[0032] 12 First retaining piece

[0033] 2 Umbrella-shaped connection

[0034] 21 tank

[0035] 211 First Groove

[0036] 212 Second groove

[0037] 22 Bulkhead

[0038] 3. Matching nails

[0039] 31 Cap body

[0040] 311 Slotting

[0041] 32 Second retaining piece DETAILED DESCRIPTION

[0042] In the description of the present invention, it should be noted that the structures, proportions, sizes, etc. illustrated in the drawings of the present specification are only used to match the contents disclosed in the specification for people familiar with the technology to understand and read, and are not used to limit the limiting conditions that the present invention can be implemented, so they have no technical substantive significance. Any modification of the structure, change of the proportion relationship or adjustment of the size, without affecting the effects that the present invention can produce and the purposes that can be achieved, should still fall within the scope of the technical content disclosed by the present invention. At the same time, the directions or positional relationships indicated by the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc. are based on the directions or positional relationships shown in the drawings, which 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 direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0043] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "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 components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0044] Furthermore, in the description of the present invention, unless otherwise specified, “plurality” means two or more.

[0045] like Figure 1 and 2As shown, an embodiment of the present invention provides a special fixation nail assembly for alveolar bone augmentation, the special fixation nail assembly for alveolar bone augmentation comprises a fixation rod 1, the autogenous alveolar bone contact side of the fixation rod 1 is provided with a threaded portion 11, when in use, the threaded portion 11 will be screwed into the autogenous alveolar bone. The fixation rod 1 is provided with a first fixation member 12 on the side away from the threaded portion 11; and further comprises an umbrella-shaped connecting portion 2, the umbrella-shaped connecting portion 2 is provided with a hollow slot body 21, the extension direction of the slot body 21 is consistent with the axial direction of the fixation rod 1, and under normal circumstances, the extension direction of the fixation rod 1 is consistent with the axial direction of the fixation rod 1. A partition 22 is provided inside the groove body 21 perpendicular to its extension direction, dividing the groove body 21 into two spaces. Specifically, the partition 22 divides the groove body 21 into a first groove 211 and a second groove 212. The first retaining member 12 cooperates with the first groove 211. When in use, the first retaining member 12 enters the first groove 211. Normally, the outer diameter of the first retaining member 12 is equal to the inner diameter of the first groove 211, or the outer diameter of the first retaining member 12 is slightly larger than the inner diameter of the first groove 211, so that the two can be well fixed when connected. In addition, the thickness of the first retaining member 12 should be greater than the thickness of the retaining member receiving groove 211, so that installation space for the autologous bone or allogeneic bone block with a hole prepared can be reserved. The thickness direction is consistent with the axial direction of the retaining rod 1. It also includes a matching nail 3, which includes a connected cap body part 31 and a second retaining piece 32; the second retaining piece 32 cooperates with the second groove 212, and when in use, the second retaining piece 32 enters the second groove 212. Normally, the outer diameter of the second retaining piece 32 is equal to the inner diameter of the second groove 212, or the outer diameter of the second retaining piece 32 is slightly larger than the inner diameter of the second groove 212, so that the two can be well fixed when connected.

[0046] Clinically, the bone block special device is placed in a special tool box and disinfected for clinical use. When the alveolar bone augmentation special retention nail assembly of the present invention is used clinically, the retention rod 1 is first implanted into the autologous alveolar bone with a nail holder. After stabilization, bone powder is implanted or the autologous bone or allogeneic bone block with a prepared hole is placed at the pre-augmented bone of the alveolar bone, and then the umbrella-shaped connecting part 2 is installed, and the special nail holder is placed in the second groove 212, so that the umbrella-shaped connecting part 2 is screwed into the first retaining piece 12 of the retention rod 1 through the first groove 211, thereby connecting the umbrella-shaped connecting part 2 to the retention rod 1. Cover film, and finally place the retention film of the matching nail 3, and the cap body 31 of the matching nail 3 is provided with a slot 311. The special nail holder is placed in the slot, so that the umbrella-shaped connecting part 2 is screwed into the second retaining piece 32 of the umbrella-shaped connecting part 2 through the second groove 212, so that the nail 3 is connected to the umbrella-shaped connecting part 2 to fix the membrane. The membrane is usually very thin, and the thickness of the second retaining piece 22 only needs to be slightly larger than the thickness of the retaining piece receiving groove 211. Eight months after the operation, the above-mentioned special retaining nail assembly is removed.

[0047] In the alveolar bone augmentation special fixation screw assembly provided by the present invention, Figure 1 As shown, the first retaining member 12 is provided with an external thread, and the first groove 211 is provided with an internal thread matched with the first retaining member 12. The cooperation of the internal and external threads allows the dedicated nail holder to screw the umbrella-shaped connecting part 2 into the first retaining member 12 of the retaining rod 1 through the first groove 211, thereby fixing the umbrella-shaped connecting part 2 to the retaining rod 1. In one embodiment, the length of the external thread of the retaining member 12 is 2 to 3 mm.

[0048] In the alveolar bone augmentation special fixation screw assembly provided by the present invention, Figure 1 As shown, the second retaining member 32 is provided with an external thread, and the second groove 212 is provided with an internal thread that matches the second retaining member 32. The cooperation of the internal and external threads allows the matching nail 3 to be screwed into the second retaining member 32 of the umbrella-shaped connecting part 2 through the second groove 212, thereby connecting the matching nail 3 to the umbrella-shaped connecting part 2, thereby fixing the membrane.

[0049] In the alveolar bone augmentation special fixation screw assembly provided by the present invention, the diameter of the umbrella-shaped connecting portion 2 gradually increases from the end away from the fixation rod 1 to the end close to the fixation rod 1. The contact area with the pre-implanted autologous bone or allogeneic bone block is larger, and the support area is larger, thereby reducing the number of alveolar bone augmentation special fixation screw assemblies used.

[0050] In the alveolar bone augmentation special retaining screw assembly provided by the present invention, the shape of the slot body 21 is generally not limited, for example, the cross-sectional shape of the slot body 21 can be square or circular. The first retaining member 12 and the second retaining member 32 are square or circular to match the shape of the slot body 21, that is, when the shape of the slot body 21 is square, the shapes of the first retaining member 12 and the second retaining member 32 are also square.

[0051] In the alveolar bone augmentation special fixation screw assembly provided by the present invention, the slot body 21 is arranged at the center of the cross section of the umbrella-shaped connecting portion 2 and extends along the axis direction of the umbrella-shaped connecting portion 2. In this way, the slot body 21 and the fixation rod 1 are more stable after being fixed by the retaining member 12.

[0052] In the special fixation screw assembly for alveolar bone augmentation provided by the present invention, the partition plate 22 divides the slot body 21 into two halves.

[0053] In the alveolar bone augmentation special fixation screw assembly provided by the present invention, the angle between the working surface of the thread in the threaded portion 11 and the radial direction of the fixation rod 1 is 10° to 30°. Such a design can facilitate the implantation of the fixation screw assembly and reduce frictional heat generation.

[0054] In the alveolar bone augmentation special fixation screw assembly provided by the present invention, the pitch refers to the distance between two adjacent threads along the axial direction of the fixation rod 1, and the pitches of each section of the threaded portion 11 are equal. The pitch of the threaded portion 11 is 0.1 to 0.3 mm. Such a design enables the threaded portion 11 to have a certain squeezing effect on the alveolar bone during the screwing process, thereby obtaining an ideal initial stability.

[0055] In the alveolar bone augmentation special fixation screw assembly provided by the present invention, the length of the threaded portion 11 is 3 to 5 mm. In some embodiments, the length of the threaded portion 11 can also be 3 to 4 mm; or 4 to 5 mm.

[0056] In the alveolar bone augmentation special fixation screw assembly provided by the present invention, the length of the fixation rod 1 can be 10-18 mm; in some embodiments, the length of the fixation rod 1 can be, for example, 10-12 mm, 12-14 mm, 14-16 mm, or 16-18 mm. The diameter of the fixation rod 1 is 1-2 mm, 1-1.5 mm, or 1.5-2 mm.

[0057] In the alveolar bone augmentation special fixation screw assembly provided by the present invention, the fixation rod 1 is a smooth structure except for the threaded portion 11, which is used to place bone powder. The length of this section is 3 to 8 mm.

[0058] In the alveolar bone augmentation special fixation screw assembly provided by the present invention, the diameter of the umbrella-shaped connecting portion 2 can be 3 to 5 mm. In some embodiments, the diameter of the umbrella-shaped connecting portion 2 can also be 3 to 4 mm, or 4 to 5 mm.

[0059] In the alveolar bone augmentation special fixation screw assembly provided by the present invention, the thickness of the umbrella-shaped connecting portion 2 can be 2 to 4 mm. In some embodiments, the thickness of the umbrella-shaped connecting portion 2 can also be 2 to 3 mm; or 3 to 4 mm.

[0060] In the alveolar bone augmentation special fixation screw assembly provided by the present invention, the side length of the slot body 21 can be 0.5-1.5 mm. In some embodiments, the side length of the slot body 21 can also be 0.5-1.0 mm; or 1.0-1.5 mm, etc.

[0061] In the alveolar bone augmentation special fixation screw assembly provided by the present invention, the thickness of the slot body 21 can be 2 to 4 mm. In some embodiments, the thickness of the slot body 21 can also be 2 to 3 mm; or 3 to 4 mm.

[0062] In the alveolar bone augmentation special fixation screw assembly provided by the present invention, the thickness of the partition plate 22 can be 0.5-1 mm. In some embodiments, the thickness of the partition plate 22 can also be 0.5-0.8 mm; or 0.8-1 mm.

[0063] In the alveolar bone augmentation special fixation screw assembly provided by the present invention, the diameter of the cap body 31 can be 2 to 3 mm. In some embodiments, the diameter of the cap body 31 can also be 2 to 2.5 mm; or 2.5 to 3 mm.

[0064] In the alveolar bone augmentation special fixation screw assembly provided by the present invention, the thickness of the cap body 31 can be 1.5 to 2.5 mm. In some embodiments, the thickness of the cap body 31 can also be 1.5 to 2.0 mm; or 2.0 to 2.5 mm.

[0065] In the alveolar bone augmentation special fixation nail assembly provided by the present invention, the length of the fixing nail 3 can be 3 to 5 mm. In some embodiments, the length of the fixing nail 3 can also be 3 to 4 mm; or 4 to 5 mm.

[0066] In the alveolar bone augmentation special fixation screw assembly provided by the present invention, Figure 3 As shown, the slot 311 on the cap body 31 is located at an end away from the umbrella-shaped connecting portion 2 and cooperates with a special nail holder.

[0067] In the special retention nail assembly for alveolar bone augmentation provided by the present invention, the material of the special retention nail assembly for alveolar bone augmentation is titanium alloy.

[0068] In the alveolar bone augmentation special fixation nail assembly of the present invention, a fixation rod 1 is first implanted into the autologous alveolar bone with a nail holder, and after stabilization, bone powder is implanted or an autologous bone or allogeneic bone block with a prepared hole is placed, and then an umbrella-shaped connecting part 2 is installed, and the umbrella-shaped connecting part 2 is screwed onto the fixation rod 1 with a special nail holder, and a film is covered, and finally a fixation nail 3 is placed on the fixation film. The alveolar bone augmentation special fixation nail assembly of the present invention can be used for the fixation of autologous bone blocks and allogeneic bone blocks, and can also be used to stabilize artificial bone powder.

[0069] In summary, the alveolar bone augmentation special retaining nail assembly provided by the embodiment of the present invention has the following advantages:

[0070] (1) The umbrella part is enlarged, and the support area is larger, thereby reducing the number of retention screw components used.

[0071] (2) The retention screw assembly can maintain the spatial stability of the bone grafting area and improve the efficiency of bone augmentation.

[0072] (3) The retention screw assembly can effectively retain bone fragments, stabilize bone powder, and retain biomembranes, with excellent effects and is conducive to new bone formation.

[0073] In summary, the present invention effectively overcomes various shortcomings of the prior art and has high industrial utilization value.

[0074] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the art may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by a person of ordinary skill in the art without departing from the spirit and technical concept disclosed by the present invention shall still be covered by the claims of the present invention.

Claims

1. A special fixation screw assembly for alveolar bone augmentation, characterized in that: The invention comprises a retaining rod (1), wherein a threaded portion (11) is provided on the autogenous alveolar bone contacting side of the retaining rod (1); a first retaining member (12) is provided on the side of the retaining rod (1) away from the threaded portion (11); and an umbrella-shaped connecting portion (2), wherein a hollow groove body (21) is provided on the umbrella-shaped connecting portion (2), wherein the extending direction of the groove body (21) is consistent with the axial direction of the retaining rod (1); and a partition plate (22) is provided inside the groove body (21) perpendicular to the extending direction thereof, wherein the partition plate (22) divides the groove body (21) into a first groove (211) and a second groove (212). ) and a second groove (212); the first retaining member (12) cooperates with the first groove (211); it also includes a matching nail (3), the matching nail (3) includes a connected cap body (31) and a second retaining member (32); the second retaining member (32) cooperates with the second groove (212); the angle between the working surface of the thread in the threaded portion (11) and the radial direction of the retaining rod (1) is 10o to 30o; the pitch of the threaded portion (11) is 0.1 to 0.3mm; the length of the threaded portion (11) is 3 to 5mm.

2. The alveolar bone augmentation special fixation screw assembly according to claim 1, characterized in that: The first retaining member (12) is provided with an external thread, and the first groove (211) is provided with an internal thread matching the first retaining member (12).

3. The alveolar bone augmentation special fixation screw assembly according to claim 1, characterized in that: The second retaining member (32) is provided with an external thread, and the second groove (212) is provided with an internal thread matching the second retaining member (32).

4. The alveolar bone augmentation special fixation screw assembly according to claim 1, characterized in that: The diameter of the umbrella-shaped connecting portion (2) gradually increases from an end away from the retaining rod (1) to an end close to the retaining rod (1).

5. The alveolar bone augmentation special fixation screw assembly according to claim 1, characterized in that: The cross-sectional shape of the trough body (21) is square or circular; the first retaining member (12) and the second retaining member (32) are square or circular in shape matching the shape of the trough body (21).

6. The alveolar bone augmentation special fixation screw assembly according to claim 1, characterized in that: The groove body (21) is arranged at the center of the cross section of the umbrella-shaped connecting portion (2) and extends in the axial direction of the umbrella-shaped connecting portion (2); The partition plate (22) divides the tank body (21) into two halves.

7. The alveolar bone augmentation special fixation screw assembly according to claim 1, characterized in that: The cap body (31) is provided with a slot (311).

8. The alveolar bone augmentation special fixation screw assembly according to claim 1, characterized in that: The length of the retaining rod (1) is 10 to 18 mm; and / or, the diameter of the retaining rod (1) is 1 to 2 mm; And / or, the diameter of the umbrella-shaped connecting portion (2) is 3 to 5 mm; And / or, the thickness of the umbrella-shaped connecting portion (2) is 2 to 4 mm; And / or, the side length of the groove body (21) is 0.5 to 1.5 mm; And / or, the thickness of the tank body (21) is 2 to 4 mm; and / or, the thickness of the partition (22) is 0.5 to 1 mm; And / or, the diameter of the cap body (31) is 2 to 3 mm; And / or, the thickness of the cap body (31) is 1.5 to 2.5 mm; And / or, the length of the matching nail (3) is 3 to 5 mm.

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