Double-layer bone cortex anchoring type bone increment system and method

Abstract

The invention relates to the technical field of dental implant, in particular to a double-layer bone cortex anchoring type bone increment system and method.The double-layer bone cortex anchoring type bone increment system comprises an anchorage nail, a first nut and a second nut, the first nut is arranged at one end of the anchorage nail, and the second nut is arranged at the other end of the anchorage nail; the second nut comprises a connecting part and a plurality of umbrella pieces, the connecting part is used for being connected with the anchorage nail, the umbrella pieces are arranged on the side wall of the connecting part, the umbrella pieces are in an arc shape, and the umbrella pieces are unfolded after being extruded. The periosteum is rigidly supported through the first nut and the second nut, and the stability of the periosteum is greatly improved.

Description

Technical Field

[0001] The present invention relates to the technical field of dental implants, and particularly 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 carried out 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 resulting in 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: 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; 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 arranged on the side wall of the connecting portion. The umbrella-shaped pieces are arc-shaped and expand after being squeezed.

[0006] In a specific feasible embodiment, the first nut has a supporting portion, which protrudes outward from the side wall of the first nut.

[0007] 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.

[0008] 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.

[0009] In a specific feasible embodiment, the first nut is not penetrated by the first threaded rod, and the second nut is not penetrated by the second threaded rod.

[0010] In a specific feasible embodiment, a plurality of fixing holes for installing titanium clips are provided on both the first nut and the second nut.

[0011] The present invention provides a double-layer cortical bone anchored bone augmentation method, adopting the following technical solutions: A double-layer cortical bone anchored bone augmentation method for installing the above double-layer cortical bone anchored bone augmentation system, comprising the following steps: Drill holes in the alveolar bone, install the anchorage screw in the alveolar bone, and both ends of the anchorage screw penetrate out of the alveolar bone; Install the periosteum on the anchorage screw, 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; Fill the periosteum with bone graft material; Reinforce the periosteum with titanium clips.

[0012] In a specific feasible embodiment, the periosteum is replaced with a titanium mesh. After using the titanium mesh, the second nut is an ordinary nut.

[0013] In summary, the present invention includes the following beneficial effects: 1. Support the bone grafting space through the umbrella pieces of the first nut and the second nut to improve the osteogenesis stability.

[0014] 2. The double-layer 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. Description of the Drawings

[0015] Figure 1 is the overall structural schematic diagram.

[0016] Figure 2 is the structural schematic diagram of the anchorage screw.

[0017] Figure 3 is the structural schematic diagram of the first nut.

[0018] Figure 4 is the schematic diagram after the anchorage screw is installed on the alveolar bone.

[0019] Description of the 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 Embodiments

[0020] The following is combined withFigures 1 - 4 A further detailed description of the present invention will be given.

[0021] Referring to Figure 1 and Figure 2 , the double-layer 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.

[0022] Referring to Figure 1 and Figure 2 , the first threaded rod 11 is arranged at one end of the second threaded rod 12 having the first thread section 121. 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.

[0023] 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.

[0024] 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.

[0025] At the same time, the traditional tent peg is only nailed into the alveolar bone. When the soft tissue in the alveolar bone moves slightly, the tent peg is easily affected by the soft tissue and its stability is reduced. Since the anchorage screw 1 penetrates through the alveolar bone and the thread directions of the first thread section 121 and the second thread section 122 are opposite, when the first thread section 121 is loosened, the clamping force of the second nut 3 will increase, and vice versa. Therefore, the anchorage screw 1 has higher stability in the alveolar bone.

[0026] 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 the design requirements, as long as the thread of the first threaded rod 11 is opposite to that of the second thread section 122.

[0027] Referring to Figure 1and Figure 3 The first nut 2 has a support portion 4, and the support portion 4 is obtained by the edge of the first nut 2 protruding outward along the diameter of the first nut 2, so that the projection of the first nut 2 on the vertical plane is elliptical. When in use, the support portion 4 is vertically arranged, that is, the long axis of the ellipse is vertical, so that the support portion 4 can support the periosteum. Since the periosteum is a soft tissue, after the bone graft material is filled in the periosteum, the shape can only be maintained by the strength of the periosteum itself. Therefore, when the bone graft material is slightly moved, the osteogenic space formed by the periosteum will collapse. The supporting effect of the support portion 4 can provide rigid support to the periosteum, thereby maintaining the osteogenic space formed by the periosteum.

[0028] It is easy to understand that the shape and number of the support part 4 are not fixed and can be adjusted according to design requirements, as long as they can provide support for the periosteum after the first nut 2 is connected to the first threaded rod 11.

[0029] Reference Figure 1 The second nut 3 includes a connecting portion 31 and an umbrella piece 32. The connecting portion 31 is used to be threadedly connected to the second threaded rod 12. The umbrella piece 32 has multiple pieces. 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 piece 32 is arranged in an arc shape, and one end of the umbrella piece 32 is bent toward the second threaded rod 12 from the connecting portion 31. In the folded state, the ends of the umbrella pieces 32 away from the connecting portion 31 overlap each other, and the effective area is small; after the umbrella pieces 32 are unfolded, the overlapping parts between the umbrella pieces 32 are eliminated, and the umbrella pieces 32 are in a flat state, and the effective area is large (the figure shows the unfolded state).

[0030] 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 first contacts the alveolar bone. As the second nut 3 continues to approach the alveolar bone, the umbrella piece 32 is gradually stretched and fits on the surface of the alveolar bone. The umbrella piece 32 can provide a larger effective area, so as to fix the periosteum over a larger area, so that the periosteum that originally required two tent nails to fix can be completed by relying on one support nail 1. In addition, when the bone transfer material causes the osteogenic space formed by the periosteum to collapse due to micro-movement and other conditions, the umbrella piece 32 can also provide a large area of ​​support for the periosteum. Even if micro-movement and other conditions occur, the umbrella piece 32 can provide rigid support for the periosteum, thereby maintaining the osteogenic space formed by the periosteum. The umbrella piece 32 and the supporting portion 4 of the first nut 2 can jointly provide rigid support to the periosteum from both sides of the periosteum, thereby greatly improving the stability of the periosteum, making the osteogenic space formed by the periosteum stable and not easy to collapse.

[0031] The first nut 2 and the umbrella piece 32 are both provided with fixing holes 6 for installing the titanium clip.

[0032] The usage process of the embodiment of the present invention is as follows: The anchorage screw 1 is installed on the pre-drilled alveolar bone, both ends of the periosteum are connected to the anchorage screw 1, the first nut 2 and the second nut 3 are screwed onto the first anchorage screw 1, the support part 4 of the first nut 2 is vertical, and the umbrella piece 32 of the second nut 3 is expanded under extrusion. The support part 4 and the umbrella piece 32 jointly support the periosteum, and bone graft materials are filled into the periosteum.

[0033] Referring 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: S100, implanting the nail body.

[0034] A hole is drilled in the alveolar bone, 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 screw 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 with the alveolar bone.

[0035] S200, screwing the first nut 2 and the second nut 3 onto the anchorage screw 1.

[0036] Both ends of the periosteum are fixed on the anchorage screw 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 part 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.

[0037] 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 to support.

[0038] S300, constructing an osteogenic space.

[0039] Bone graft materials are filled into the periosteum, and the bone graft materials are used to support the periosteum to form an osteogenic space. At the same time, when filling the bone graft materials, the umbrella piece of the second nut 3 will be further expanded, thereby improving the clamping effect of the umbrella piece on the periosteum.

[0040] S400, periosteum reinforcement.

[0041] Titanium clips are installed in the fixing holes 6 of the second nut 3, and the titanium clips are used to reinforce the periosteum. Specifically, there are three in this embodiment, and the three titanium clips are distributed at intervals of 120°.

[0042] The above are all preferred embodiments of the present invention, and the protection scope of the present invention is not limited accordingly. Therefore, all equivalent changes made according to the structure, shape, and principle of the present invention should be covered within the protection scope of the present invention.

Claims

1. A double-layer cortical bone anchoring bone augmentation system, characterized in that: It comprises an anchor nail (1), a first nut (2) and a second nut (3), wherein the first nut (2) is arranged at one end of the anchor nail (1), and the second nut (3) is arranged at the other end of the anchor nail (1); The second nut (3) comprises a connecting portion (31) and a plurality of umbrella pieces (32); the connecting portion (31) is used for connecting the support nail (1); the plurality of umbrella pieces (32) are arranged on the side wall of the connecting portion (31); the umbrella pieces (32) are arc-shaped and are expanded after being squeezed.

2. The double-layer cortical bone anchored bone augmentation system according to claim 1, characterized in that: The first nut (2) has a supporting portion (4), and the supporting portion (4) is obtained by protruding outwards from the side wall of the first nut (2).

3. The double-layer cortical bone anchoring bone augmentation system according to claim 1, characterized in that: The anchor nail (1) comprises a first threaded rod (11) and a second threaded rod (12), wherein the threads of the first threaded rod (11) and the second threaded rod (12) have opposite directions of rotation.

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

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

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

7. A double-layer cortical bone anchoring bone augmentation method, characterized in that: The method for installing the double-layer cortical bone anchoring bone augmentation system according to any one of claims 1 to 6 comprises the following steps: Drilling a hole in the alveolar bone, installing the anchorage nail (1) in the alveolar bone, with both ends of the anchorage nail (1) passing through the alveolar bone; The periosteum is installed on the support nail (1), a first nut (2) is installed on the end of the support nail (1) close to the lips, and a second nut (3) is installed on the end of the support nail (1) close to the tongue; Filling the periosteum with bone graft material; The periosteum was reinforced with titanium clips.

8. The double-layer cortical bone anchoring bone augmentation method according to claim 7, characterized in that: The periosteum is replaced by a titanium mesh. After the titanium mesh is used, the second nut (3) is a common nut.

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