Positioning guide plate

Abstract

The utility model relates to the technical field of positioning guide plates, and provides a positioning guide plate which comprises a first guide plate, a plurality of positioning bosses arranged on the first guide plate and first screws. The first guide plate is provided with a first mounting hole for the first screw to pass through; and the plurality of positioning bosses and the first guide plate are enclosed to form an accommodating space for clamping a bone sheet.

Description

Technical Field

[0001] This utility model belongs to the technical field of positioning guide plates, and more specifically, relates to a positioning guide plate. Background Technology

[0002] Split bone block technique (SBB) is a modified form of autologous bone grafting. Khoury's continuous improvements to SBB have led to its widespread adoption. By dividing a thick mandibular cortical bone block into at least two separate blocks, the number of bone blocks available for reconstructing bone defects can be increased, thus reducing the volume of autologous bone required. This allows for intraoral bone harvesting in some cases, avoiding extraoral harvesting, reducing surgical trauma, and expanding the indications for the procedure. The combination of thin cortical bone blocks, autologous bone fragments, and granular bone substitutes can adapt well to bone defect morphology, even in cases of severe alveolar bone atrophy, and the volume of the grafted bone is flexible and variable. Furthermore, SBB accelerates revascularization and osteogenic formation of the grafted bone. Enhanced repair and regeneration, along with an increase in key osteocytes, leads to reduced bone resorption, resulting in long-term stable restoration of the alveolar ridge contour. Histological analysis of the osteogenic area six months after grafting shows homogeneous bone quality, high density, and active new bone formation.

[0003] Because the SBB technique requires removing a piece of mandibular bone and opening a second surgical area, it is highly invasive and causes significant swelling and pain in patients after surgery. Therefore, a few manufacturers currently produce allogeneic bone fragments that can replace the extracted autologous bone fragments for bone defect reconstruction.

[0004] To achieve better bone grafting results, bone grafts are typically first fixed to the alveolar bone, and then bone powder is used to fill the space between the alveolar bone and the bone graft to increase bone volume. The bone graft is usually fixed to the alveolar bone with bone screws.

[0005] Numerous problems have arisen in traditional clinical procedures. First, the lack of digital aids forces clinicians to rely solely on experience, hindering their ability to quickly and accurately determine the placement of bone grafts to ensure sufficient bone augmentation for implantation without compromising soft tissue tension. Second, the shapes of both irregular autologous and fixed-size allogeneic bone grafts may not perfectly match the curvature of alveolar bone, often requiring additional grinding and trimming, significantly increasing clinical workload and surgical time. Furthermore, current standard surgical procedures involve drilling holes in the bone graft and inserting one or more corresponding fixation screws, but accurately determining the length and orientation of these screws to avoid damaging adjacent critical anatomical structures is challenging. Finally, when simultaneously inserting one or more screws through the bone graft and alveolar bone, maintaining the autologous / pre-made allogeneic bone graft in its ideal three-dimensional position is difficult, leading to instability, positional shifts, and even bone breakage. All these issues can result in inaccurate placement of the bone graft in the ideal three-dimensional position, ultimately affecting the effectiveness of bone augmentation. Utility Model Content

[0006] The purpose of this invention is to provide a positioning guide plate to solve the technical problem in the prior art that bone pieces cannot be accurately installed in the required position.

[0007] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a positioning guide plate is provided, comprising: a first guide plate, a plurality of positioning bosses disposed on the first guide plate, and a first screw; the first guide plate is provided with a first mounting hole for the first screw to pass through; the plurality of positioning bosses and the first guide plate form an accommodating space for the bone piece to be inserted.

[0008] Furthermore, the first guide plate has a first channel through which the bone screws on the bone plate pass.

[0009] Furthermore, the first channel is a notch formed at the edge of the first guide plate.

[0010] Furthermore, the plurality of positioning bosses and the first guide plate are integral components; and / or

[0011] The first guide plate has a second channel for introducing bone powder.

[0012] Furthermore, the number of the positioning bosses is multiple; and / or

[0013] The first guide plate has a customized fitting surface for anastomosis with alveolar bone.

[0014] Furthermore, there are multiple first mounting holes and multiple first screws; the multiple first mounting holes and the multiple first screws correspond one-to-one; and / or

[0015] It also includes: a positioning channel; the positioning channel is used for the bone piece to slide out of the receiving space; the multiple positioning bosses and the first guide plate enclose and form the positioning channel that communicates with the receiving space.

[0016] Furthermore, it also includes: a bone plate and a second screw; the bone plate is fitted into the accommodating space; the bone plate has a second mounting hole for the second screw to pass through.

[0017] Furthermore, it also includes: a second guide plate; the second guide plate has a positioning groove for the bone piece to be inserted; the edge of one end of the positioning groove matches the shape of the edge of one end of the bone piece.

[0018] Furthermore, the second guide plate is provided with a guide hole; when the bone piece is engaged in the positioning groove, the position of the second mounting hole is located on the extension path of the guide hole.

[0019] Furthermore, there are multiple guide holes and multiple second mounting holes; the multiple guide holes and the multiple second mounting holes correspond one-to-one; the distance between any two adjacent second mounting holes is greater than 2mm, and the distance between any second mounting hole and the edge of the bone piece is greater than 2mm.

[0020] The advantages of the positioning guide plate provided by this utility model are as follows: Compared with the prior art, the positioning guide plate provided by this utility model has multiple positioning bosses on the first guide plate and a first mounting hole on the first guide plate. A first screw passes through the first mounting hole and can fix the first guide plate to the alveolar bone. The multiple positioning bosses and the first guide plate form a receiving space for the bone piece to be inserted. When the bone piece is inserted into the receiving space, the bone piece can be positioned, which improves the accuracy and stability of the bone piece installation position. Attached Figure Description

[0021] Figure 1 A perspective view of the first guide plate provided in an embodiment of this utility model;

[0022] Figure 2 A three-dimensional schematic diagram of the second guide plate provided in an embodiment of this utility model.

[0023] The following are the labeling elements in the figure:

[0024] 11-First guide plate; 111-First mounting hole; 112-First channel; 113-Second channel; 12-Positioning boss; 2-Second guide plate; 21-Positioning groove; 22-Guide hole. Detailed Implementation

[0025] It should be noted that the specific embodiments are only used to explain the present invention and are not intended to limit the present invention.

[0026] It should be noted that, in the description of the embodiments of this application, unless otherwise stated, " / " means "or". For example, A / B can mean A or B. The "and / or" in this document is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Here, A and B can be singular or plural, respectively.

[0027] It should be noted that when a component is referred to as "fixed to" or "set on" another component, it can be directly on or indirectly on the other component. When a component is referred to as "connected to" or "attached to" another component, it can be directly connected to or indirectly connected to the other component.

[0028] It should be noted that the terms "length", "width", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0029] It should be noted that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature.

[0030] It should be noted that the term "multiple" means two or more, unless otherwise explicitly specified.

[0031] Please refer to the following: Figures 1 to 2 The positioning guide plate provided by this utility model will now be described. The positioning guide plate includes: a first guide plate 11, a plurality of positioning bosses 12 disposed on the first guide plate 11, and a first screw; the first guide plate 11 is provided with a first mounting hole 111 for the first screw to pass through; the plurality of positioning bosses 12 and the first guide plate 11 enclose a receiving space for the bone piece to be inserted.

[0032] Thus, the first guide plate 11 is provided with multiple positioning bosses 12, and the first guide plate 11 is provided with a first mounting hole 111. The first screw passes through the first mounting hole 111 and can fix the first guide plate 11 to the alveolar bone. The multiple positioning bosses 12 and the first guide plate 11 enclose a receiving space for the bone piece to be inserted. When the bone piece is inserted into the receiving space, the bone piece can be positioned, which improves the accuracy and stability of the bone piece installation position.

[0033] In one embodiment, the accommodating space is a recessed space or a recessed portion.

[0034] In one embodiment, one or all of the components of this positioning guide are: a personalized product designed and manufactured using computer-aided design based on the patient's individual circumstances.

[0035] Further, please refer to Figures 1 to 2 As a specific embodiment of the positioning guide plate provided by this utility model, the first guide plate 11 has a first channel 112 for bone screws on the bone plate to pass through. In this way, bone screws on the bone plate can pass through the first channel 112 and be fixed to the alveolar bone, avoiding the bone screws from hitting the first guide plate 11.

[0036] Further, please refer to Figures 1 to 2 In one specific embodiment of the positioning guide plate provided by this utility model, the first channel 112 is a notch formed on the edge of the first guide plate 11. This makes it very convenient to remove the first guide plate 11.

[0037] Further, please refer to Figures 1 to 2 In one specific embodiment of the positioning guide plate provided by this utility model, the multiple positioning bosses 12 and the first guide plate 11 are integrated as a single piece. This makes the positioning bosses 12 and the first guide plate 11 more firmly bonded.

[0038] In one embodiment, the first guide plate 11 has a second channel 113 for introducing bone powder. In this way, the user can introduce bone powder from the outside of the first guide plate 11 between the bone fragment and the alveolar bone through the second channel 113.

[0039] In one embodiment, positioning bosses 12 are provided on both sides of the second channel 113.

[0040] Further, please refer to Figures 1 to 2 In one specific embodiment of the positioning guide plate provided by this utility model, the number of positioning protrusions 12 is four. Thus, the four positioning protrusions 12 can limit the bone piece from three directions.

[0041] In one embodiment, the first guide plate 11 has a customized fitting surface for conforming to the alveolar bone. Thus, the fitting surface can perfectly conform to the alveolar bone.

[0042] Further, please refer to Figures 1 to 2 As a specific embodiment of the positioning guide plate provided by this utility model, there are multiple first mounting holes 111 and multiple first screws; the multiple first mounting holes 111 and the multiple first screws correspond one-to-one.

[0043] In one embodiment, the device further includes: a positioning channel; the positioning channel is used for the bone fragment to slide out of the receiving space; a plurality of positioning protrusions 12 and the first guide plate 11 enclose and form a positioning channel communicating with the receiving space. Thus, when the first guide plate 11 is removed, the bone fragment can slide out of the receiving space along the positioning channel and separate from the first guide plate 11.

[0044] Further, please refer to Figures 1 to 2 As a specific embodiment of the positioning guide plate provided by this utility model, it further includes: a bone plate and a second screw; the bone plate is engaged within the accommodating space; a second mounting hole is provided on the bone plate for the second screw to pass through. Thus, the bone plate can be positioned after being engaged within the accommodating space, and the second screw can be fixed to the alveolar bone after passing through the second mounting hole.

[0045] In one embodiment, the second screw is a bone screw.

[0046] Further, please refer to Figures 1 to 2 As a specific embodiment of the positioning guide plate provided by this utility model, it further includes: a second guide plate 2; the second guide plate 2 has a positioning groove 21 for inserting the bone piece; the edge of one end of the positioning groove 21 matches the shape of the edge of one end of the bone piece. In this way, the user can process or modify the edge shape of the bone piece along the edge of the second guide plate 2.

[0047] In one embodiment, the second guide plate 2 is designed and manufactured according to the specific bone fragment size designed by computer. The shape of autologous / finished bone fragments can be cut in advance using the second guide plate 2 to achieve a perfect match with the design.

[0048] Further, please refer to Figures 1 to 2 As a specific embodiment of the positioning guide plate provided by this utility model, the second guide plate 2 is provided with a guide hole 22; when the bone piece is stuck in the positioning groove 21, the position of the second mounting hole is located on the extension path of the guide hole 22. In this way, a tool (such as a drill bit) can process the second mounting hole after passing through the guide hole 22; when the bone piece is stuck in the positioning groove 21, the user processes the second mounting hole through the guide hole 22, which improves the positioning accuracy when processing the second mounting hole.

[0049] Further, please refer to Figures 1 to 2As a specific embodiment of the positioning guide plate provided by this utility model, there are multiple guide holes 22 and multiple second mounting holes; the multiple guide holes 22 and the multiple second mounting holes correspond one-to-one.

[0050] In one embodiment, the distance between any two adjacent second mounting holes is greater than 2 mm, and the distance between any second mounting hole and the edge of the bone piece is greater than 2 mm.

[0051] In one embodiment, the positioning guide is used as follows: [1] In one embodiment, CT technology is used to obtain three-dimensional image data of the patient's alveolar bone. By analyzing and processing the patient's three-dimensional image data, the most suitable bone fragment shape for the patient is designed. Then, the bone fragment shape and the alveolar bone shape are combined to design a bone fragment guide. The bone fragment guide is divided into two parts: a first guide 11 and a second guide 2. The second guide 2 is used to cut the original bone fragment into the required shape. The first guide 11 is used to accurately place the cut bone fragment at the alveolar bone defect location. [2] In one embodiment, the original bone fragment is cube-shaped. The second guide 2 is used to cut the cube-shaped bone fragment into the designed shape. The second guide 2 is a groove-shaped structure, and its outline is referenced to the shape of the required bone fragment. On the two adjacent sides of the second guide 2, there are slots. The slots should be higher than the second guide 2, and the height depends on the thickness of the original bone fragment. When the original bone fragment is placed on the second guide 2, the original bone fragment should be flush with the slots. The shape of the second guide 2 should be consistent with the shape of the required bone fragment. During the surgery, the original bone fragment is placed on the second guide plate 2, and the original bone fragment is cut along the edge of the second guide plate 2 to obtain the desired bone fragment shape. The second guide plate 2 has a guide hole 22. When the bone fragment is placed on the alveolar bone, a bone screw needs to be passed through the bone fragment and screwed into the alveolar bone to fix the bone fragment. The function of the guide hole 22 is to position the second mounting hole in the bone fragment. The original bone fragment is placed on the second guide plate 2, and a drill bit is passed through the guide hole 22 to drill a hole in the bone fragment to obtain the second mounting hole on the bone fragment. The diameter of the guide hole 22 should be slightly larger than the outer diameter of the bone screw thread, usually 2 mm. [3] In one embodiment, regarding the first guide plate 11: the first guide plate 11 is designed according to the contour of the patient's bone defect area. The mounting surface of the first guide plate 11 matches the alveolar bone and can stably support the bone fragment when placed in the bone defect area. The first guide plate 11 has a first mounting hole 111 in the area near the alveolar bone crest. The first screw passes through the first mounting hole 111 and is screwed into the alveolar bone to fix the first guide plate 11. This prevents the first guide plate 11 from shifting due to external forces during surgery. The inner diameter of the first mounting hole 111 should be slightly larger than the outer diameter of the first screw, typically 2 mm. The upper end of the first mounting hole 111 is flat to allow the first screw to be screwed in smoothly without deflection. The surface of the first guide plate 11 has raised positioning bosses 12. There are usually multiple positioning bosses 12, at least one located at the crest region of the first guide plate 11, and the other two located on the left and right sides of the first guide plate 11 respectively. The protrusion height of the positioning bosses 12 is not less than the thickness of the bone fragment. During surgery, the bone fragment should be placed in the area enclosed by the outer surface of the first guide plate 11 and the positioning bosses 12. The first guide plate 11 has a first channel 112, which is a hollow structure and has an irregular shape. Its function is to prevent the bone screws from touching the first guide plate 11 and causing interference when fixing the bone pieces on the first guide plate 11 with bone screws.The first guide plate 11 has a second channel 113, which is a hollow structure located in the crest region of the first guide plate 11. Its function is that after the bone fragments on the first guide plate 11 are fixed with bone screws, bone powder can be filled between the bone fragments and the alveolar bone through the second channel 113 to form a support and maintain the relative position between the bone fragments and the alveolar bone to the greatest extent possible after the first guide plate 11 is removed.

[0052] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and substitutions can be made without departing from the technical principles of the present utility model, and these improvements and substitutions should also be considered within the protection scope of the present utility model.

Claims

1. A positioning guide plate, characterized in that, include: A first guide plate, a plurality of positioning bosses disposed on the first guide plate, and a first screw; the first guide plate has a first mounting hole for the first screw to pass through; the plurality of positioning bosses and the first guide plate enclose a receiving space for the bone piece to be inserted.

2. The positioning guide plate as described in claim 1, characterized in that, The first guide plate has a first channel through which the bone screw on the bone plate passes.

3. The positioning guide plate as described in claim 2, characterized in that, The first channel is a notch formed at the edge of the first guide plate.

4. The positioning guide plate as described in claim 1, characterized in that, The plurality of positioning bosses and the first guide plate are integral parts; and / or The first guide plate has a second channel for introducing bone powder.

5. The positioning guide plate as described in claim 1, characterized in that, The number of positioning bosses is multiple; and / or The first guide plate has a customized fitting surface for anastomosis with alveolar bone.

6. The positioning guide plate as described in claim 1, characterized in that, There are multiple first mounting holes and multiple first screws; the multiple first mounting holes and the multiple first screws correspond one-to-one; and / or It also includes: a positioning channel; the positioning channel is used for the bone piece to slide out of the receiving space; the multiple positioning bosses and the first guide plate enclose and form the positioning channel that communicates with the receiving space.

7. The positioning guide plate according to any one of claims 1 to 6, characterized in that, Also includes: A bone plate and a second screw; the bone plate is fitted into an accommodating space; the bone plate has a second mounting hole for the second screw to pass through.

8. The positioning guide plate as described in claim 7, characterized in that, Also includes: A second guide plate; the second guide plate has a positioning groove for the bone piece to be inserted; the edge of one end of the positioning groove matches the shape of the edge of one end of the bone piece.

9. The positioning guide plate as described in claim 8, characterized in that, The second guide plate has a guide hole; when the bone piece is inserted into the positioning groove, the position of the second mounting hole is located on the extension path of the guide hole.

10. The positioning guide plate as described in claim 9, characterized in that, The number of guide holes is multiple, and the number of second mounting holes is multiple; the multiple guide holes and the multiple second mounting holes correspond one-to-one; the distance between any two adjacent second mounting holes is greater than 2mm, and the distance between any second mounting hole and the edge of the bone piece is greater than 2mm.

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