A double-layer cortical bone anchoring bone augmentation system and method

Abstract

The present invention relates to the technical field of dental implants, and in particular to a double-cortical bone anchored bone augmentation system and method. The double-cortical bone anchored bone augmentation system includes an anchorage screw, a first nut, and a second nut. The first nut is disposed at one end of the anchorage screw, and the second nut is disposed at the other end of the anchorage screw. The second nut includes a connecting portion and a plurality of umbrella-shaped pieces. The connecting portion is used to connect the anchorage screw, and the plurality of umbrella-shaped pieces are disposed on the side wall of the connecting portion. The umbrella-shaped pieces are arc-shaped, and the umbrella-shaped pieces expand after being squeezed. The present invention rigidly supports the periosteum through the first nut and the second nut, greatly improving the stability of the periosteum.

Description

Technical Field

[0001] The present invention relates to the technical field of dental implants, and in particular to a double-cortical bone anchored bone augmentation system and method. Background Art

[0002] Dental implant is an important tooth restoration technique in modern dentistry. By implanting an implant into the alveolar bone to form a stable bone union with the bone tissue, and then installing a dental crown on the implant to restore the function and aesthetics of the missing tooth. During the dental implant process, there are cases where the patient has bone deficiency, and in this case, bone augmentation, that is, bone grafting, needs to be performed first.

[0003] Currently, the common bone grafting method is the sausage bone grafting technique. A periosteum is set on the alveolar bone and fixed with tent nails, and then bone graft materials such as bone powder are filled in the periosteum. However, the sausage bone grafting technique depends on the strength of the periosteum. When the strength of the periosteum is not high, the osteogenic space formed by the periosteum is prone to collapse and other situations, resulting in the absorption of the bone graft material, further leading to insufficient space maintenance and the need for subsequent measures for remedy. Summary of the Invention

[0004] In order to improve the stability after the installation of the periosteum, the present invention provides a double-cortical bone anchored bone augmentation system and method.

[0005] The present invention provides a double-cortical bone anchored bone augmentation system, adopting the following technical solution:

[0006] A double-cortical bone anchored bone augmentation system includes an anchorage screw, a first nut and a second nut. The first nut is arranged at one end of the anchorage screw, and the second nut is arranged at the other end of the anchorage screw;

[0007] The second nut includes a connecting portion and a plurality of umbrella-shaped pieces. The connecting portion is used for connecting the anchorage screw, and the plurality of umbrella-shaped pieces are arranged on the side wall of the connecting portion. The umbrella-shaped pieces are arc-shaped, and the umbrella-shaped pieces expand after being squeezed.

[0008] In a specific feasible embodiment, the first nut has a supporting portion, and the supporting portion protrudes outward from the side wall of the first nut.

[0009] In a specific feasible embodiment, the anchorage screw includes a first threaded rod and a second threaded rod, and the thread directions of the first threaded rod and the second threaded rod are opposite.

[0010] In a specific feasible embodiment, the second threaded rod has a first threaded section and a second threaded section, and the thread direction of the first threaded rod is the same as that of the first threaded section and opposite to that of the second threaded section.

[0011] In a specific feasible implementation, the first nut is not penetrated by the first threaded rod, and the second nut is not penetrated by the second threaded rod.

[0012] In a specific feasible implementation, a plurality of fixing holes for installing titanium clips are provided on both the first nut and the second nut.

[0013] The present invention provides a double-cortical bone-anchored bone augmentation method, adopting the following technical solutions:

[0014] A double-cortical bone-anchored bone augmentation method for installing the above double-cortical bone-anchored bone augmentation system includes the following steps:

[0015] Drill holes in the alveolar bone, install the anchorage screws in the alveolar bone, and both ends of the anchorage screws penetrate out of the alveolar bone;

[0016] Install the periosteum on the anchorage screws, install the first nut at the end of the anchorage screw close to the lip, and install the second nut at the end close to the tongue;

[0017] Fill the bone graft material in the periosteum;

[0018] Reinforce the periosteum with titanium clips.

[0019] In a specific feasible implementation, the periosteum is replaced by a titanium mesh. After using the titanium mesh, the second nut is an ordinary nut.

[0020] In summary, the present invention includes the following beneficial effects:

[0021] 1. Support the bone grafting space through the umbrella pieces of the first nut and the second nut to improve the osteogenesis stability.

[0022] 2. The double-cortical bone anchorage screw method provides more stable support for the periosteum or titanium mesh, further improving the stability of the periosteum or titanium mesh. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a schematic diagram of the overall structure.

[0024] Figure 2 is a schematic diagram of the structure of the anchorage screw.

[0025] Figure 3 is a schematic diagram of the structure of the first nut.

[0026] Figure 4 is a schematic diagram after the anchorage screw is installed on the alveolar bone.

[0027] Description of reference numerals: 1, anchorage screw; 11, first threaded rod; 12, second threaded rod; 121, first thread section; 122, second thread section; 2, first nut; 3, second nut; 31, connecting portion; 32, umbrella piece; 4, supporting portion; 6, fixing hole. Detailed implementation manners

[0028] The following Figures 1-4 further elaborates on the present invention in detail.

[0029] Referring to Figure 1 and Figure 2 , the double-cortical bone-anchored bone augmentation system includes an anchorage screw 1, a first nut 2, and a second nut 3. The anchorage screw 1 includes a first threaded rod 11 and a second threaded rod 12. The thread of the first threaded rod 11 is a left-handed thread. The second threaded rod 12 has a first thread section 121 and a second thread section 122. The first thread section 121 is a left-handed thread, and the second thread section 122 is a right-handed thread. The diameter of the second thread section 122 is smaller than that of the first thread section 121, so that the second thread section 122 can directly pass through after entering the hole in the alveolar bone. When the first thread section 121 enters the hole in the alveolar bone, it is threadedly connected to the alveolar bone.

[0030] Referring to Figure 1 and Figure 2 , the first threaded rod 11 is arranged at one end of the second threaded rod 12 where the first thread section 121 is located. The first nut 2 is threadedly connected to the first threaded rod 11, and the second nut 3 is threadedly connected to the second thread section 122 of the second threaded rod 12.

[0031] It should be noted that after the first nut 2 and the second nut 3 are threadedly connected to the anchorage screw 1, they will not be penetrated by the anchorage screw 1. That is, after the first threaded rod 11 penetrates from one end of the first nut 2, it will not penetrate from the other end. After the second threaded rod 12 penetrates from one end of the second nut 3, it will not penetrate from the other end.

[0032] During use, the anchorage screw 1 penetrates through the alveolar bone, and the first thread section 121 is threadedly connected to the alveolar bone. Both ends of the periosteum are connected to both ends in the axial direction of the anchorage screw 1. Since the thread directions of the first threaded rod 11 and the second thread section 122 are opposite, when the soft tissue in the alveolar bone moves slightly and causes one end of the anchorage screw 1 to be loosened by a reverse force, the clamping force at the other end will increase, thereby maintaining the clamping effect of the first nut 2 and the second nut 3 on the periosteum.

[0033] Meanwhile, traditional tent pins are only driven into the alveolar bone. When the soft tissue in the alveolar bone moves slightly, the tent pins are easily affected by the soft tissue and their stability decreases. Since the anchorage pin 1 penetrates through the alveolar bone and the thread directions of the first thread segment 121 and the second thread segment 122 are opposite, when the first thread segment 121 loosens, the clamping force of the second nut 3 will increase, and vice versa. Therefore, the anchorage pin 1 has higher stability in the alveolar bone.

[0034] It is easy to understand that the thread directions of the first threaded rod 11 and the second threaded rod 12 can be adjusted according to design requirements, and it is only necessary that the thread of the first threaded rod 11 is opposite to that of the second thread segment 122.

[0035] Referring to Figure 1 and Figure 3 , the first nut 2 has a supporting portion 4. The supporting portion 4 is formed by protruding outward from the edge of the first nut 2 along the diameter of the first nut 2, so that the projection of the first nut 2 on the vertical plane is elliptical. During use, the supporting portion 4 is arranged vertically, that is, the long axis of the ellipse is vertical, so that the supporting portion 4 can support the periosteum. Since the periosteum is soft tissue, after filling bone graft materials in the periosteum, the shape can only be maintained by the strength of the periosteum itself. Therefore, when the bone graft materials are affected by slight movement or other conditions, it will cause the osteogenic space formed by the periosteum to collapse. The supporting effect of the supporting portion 4 can provide rigid support for the periosteum, thereby maintaining the osteogenic space formed by the periosteum.

[0036] It is easy to understand that the shape and number of the supporting portions 4 are not fixed and can be adjusted according to design needs, as long as they can provide support for the periosteum after the first nut 2 is connected to the first threaded rod 11.

[0037] Referring to Figure 1 , the second nut 3 includes a connecting portion 31 and umbrella pieces 32. The connecting portion 31 is used for threaded connection on the second threaded rod 12. There are multiple umbrella pieces 32, and the multiple umbrella pieces 32 are installed on the side wall of the connecting portion 31. The umbrella pieces 32 are arranged circumferentially around the axis of the second threaded rod 12. The umbrella pieces 32 are arranged in an arc shape, and one end of the umbrella piece 32 away from the connecting portion 31 bends towards the second threaded rod 12. In the retracted state, the ends of the umbrella pieces 32 away from the connecting portion 31 overlap each other, and the acting area is small; after the umbrella pieces 32 are unfolded, the overlapping part between the umbrella pieces 32 is eliminated, and the umbrella pieces 32 are in a flat state, and the acting area is large (shown in the figure as the unfolded state).

[0038] When the second nut 3 approaches the alveolar bone on the second threaded rod 12, the end of the umbrella piece 32 away from the connecting portion 31 contacts the alveolar bone first. As the second nut 3 continuously approaches the alveolar bone, the umbrella piece 32 is gradually expanded and attached to the surface of the alveolar bone. The umbrella piece 32 can provide a larger acting area, thereby fixing a larger area of the periosteum, enabling the periosteum that originally required two tent pegs to be fixed to be completed by relying on one anchorage nail 1. In addition, when the bone graft material causes the osteogenic space formed by the periosteum to collapse due to micro-movement or other conditions, the umbrella piece 32 can also provide a large-area support for the periosteum. Even in the case of micro-movement or the like, the umbrella piece 32 can provide a rigid support for the periosteum, thereby maintaining the osteogenic space formed by the periosteum. The umbrella piece 32 and the support portion 4 of the first nut 2 can jointly provide a rigid support for the periosteum from both sides of the periosteum, thereby greatly enhancing the stability of the periosteum and making the osteogenic space formed by the periosteum stable and not prone to collapse.

[0039] Fixing holes 6 are provided on both the first nut 2 and the umbrella piece 32 for installing titanium clips.

[0040] The usage process of the embodiment of the present invention is as follows: The anchorage nail 1 is installed on the pre-drilled alveolar bone, the two ends of the periosteum are connected to the anchorage nail 1, the first nut 2 and the second nut 3 are screwed onto the first anchorage nail 1, the support portion 4 of the first nut 2 is vertical, and the umbrella piece 32 of the second nut 3 is expanded under extrusion. The support portion 4 and the umbrella piece 32 jointly support the periosteum, and bone graft material is filled in the periosteum.

[0041] Refer to Figure 4 , the present invention also discloses a double cortical bone anchored bone augmentation method for installing the above double cortical bone anchored bone augmentation system in the alveolar bone, including the following steps:

[0042] S100, implanting the nail body.

[0043] A hole is drilled in the alveolar bone, and the diameter of the hole is slightly larger than the diameter of the second threaded section 122 but smaller than the diameter of the first threaded section 121. When the anchorage nail 1 is drilled into the alveolar bone, the second threaded section 122 can directly enter the hole, and the first threaded section 121 needs additional screwing to be threadedly connected to the alveolar bone.

[0044] S200, screwing the first nut 2 and the second nut 3 onto the anchorage nail 1.

[0045] The two ends of the periosteum are fixed to the anchorage nail 1, the first nut 2 is screwed onto the first threaded rod 11, and the second nut 3 is screwed onto the second threaded rod 12. After the first nut 2 is positioned, the support portion 4 on the first nut 2 is in a vertical state. After the second nut 3 is positioned, the umbrella piece 32 of the second nut 3 is in an expanded state under the reaction force of the alveolar bone.

[0046] It is easy to understand that the periosteum can also be replaced by a titanium mesh. The difference is that after using the titanium mesh, the second nut 3 can be replaced by an ordinary nut, and there is no need for the umbrella piece 32 for support.

[0047] S300, constructing an osteogenic space.

[0048] Fill the osteogenic material in the periosteum, use the osteogenic material to support the periosteum, and form an osteogenic space. At the same time, when filling the osteogenic material, the umbrella piece of the second nut 3 will be further opened, thereby improving the clamping effect of the umbrella piece on the periosteum.

[0049] S400, periosteum reinforcement.

[0050] Install titanium clips in the fixing holes 6 of the second nut 3, and use the titanium clips to reinforce the periosteum. Specifically, there are three titanium clips in this embodiment, and the three titanium clips are distributed at intervals of 120°.

[0051] The above are all preferred embodiments of the present invention, and the protection scope of the present invention is not limited thereby. Therefore, all equivalent changes made according to the structure, shape, and principle of the present invention shall be covered within the protection scope of the present invention.

Claims

1. A double-layer cortical bone anchored bone augmentation system, characterized in that: It includes an anchorage screw (1), a first nut (2) and a second nut (3). The first nut (2) is arranged at one end of the anchorage screw (1), and the second nut (3) is arranged at the other end of the anchorage screw (1). The second nut (3) includes a connecting portion (31) and multiple umbrella-shaped pieces (32). The connecting portion (31) is used to connect the anchorage screw (1), and the multiple umbrella-shaped pieces (32) are arranged on the side wall of the connecting portion (31). The umbrella-shaped pieces (32) are arc-shaped, and the umbrella-shaped pieces (32) expand after being squeezed.

2. The double-layer cortical bone anchored bone augmentation system according to claim 1, wherein: The first nut (2) has a supporting portion (4), and the supporting portion (4) protrudes outward from the side wall of the first nut (2).

3. The double-layer cortical bone anchored bone augmentation system according to claim 1, wherein: The anchorage screw (1) includes a first threaded rod (11) and a second threaded rod (12), and the thread directions of the first threaded rod (11) and the second threaded rod (12) are opposite.

4. The double-cortical bone anchored bone augmentation system according to claim 3, wherein: The second threaded rod (12) has a first thread section (121) and a second thread section (122). The thread direction of the first threaded rod (11) is the same as that of the first thread section (121) and opposite to that of the second thread section (122).

5. The double-layer cortical bone anchored bone augmentation system according to claim 3, characterized in that: The first nut (2) is not penetrated by the first threaded rod (11), and the second nut (3) is not penetrated by the second threaded rod (12).

6. The double-layer cortical bone anchored bone augmentation system according to claim 1, characterized in that: Multiple fixing holes (6) are formed in both the first nut (2) and the second nut (3).

7. A double-layer cortical bone anchored bone augmentation method, characterized in that: The steps for installing the double-cortical bone-anchored bone augmentation system according to any one of claims 1-6 are as follows: Drill a hole in the alveolar bone, install the anchorage screw (1) in the alveolar bone, and both ends of the anchorage screw (1) penetrate out of the alveolar bone; Install a periosteum on the anchorage screw (1), install the first nut (2) at the end of the anchorage screw (1) close to the lip, and install the second nut (3) at the end close to the tongue; Fill bone graft material in the periosteum; Reinforce the periosteum with titanium clips.

8. The double-layer cortical bone anchored bone augmentation method according to claim 7, wherein: The periosteum is replaced with a titanium mesh. After using the titanium mesh, the second nut (3) is a common nut.

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