Positioning scanning rod and positioning scanning device for dentition deficiency or defect
Through the positioning scanning rod of the umbrella scanning head and the beveled registration surface structure, combined with auxiliary rod and titanium material, the problem of insufficient scanning accuracy in toothless jaw implantation and repair is solved, and more efficient and accurate scanning data capture and occlusal relationship recording is achieved.
Patent Information
- Application Number
- CN202421926614.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-09
- Publication Date
- 2025-07-11
- Estimated Expiration
- 2034-08-09
AI Technical Summary
In the prior art, in the ottoless jaw implantation and restoration, the lack of geometric shape of the transition area and the limitations of the traditional cylindrical scanning rod leads to insufficient scanning accuracy, and the three-dimensional morphology and occlusal relationship of the scanning rod cannot be quickly and accurately obtained.
A positioning scanning rod with an umbrella scanning head and a beveled registration surface structure is designed, combining auxiliary rods and high-strength titanium metal material to enhance the ability to capture geometric features and fix the positioning nails with the implant abutment to ensure the accurate occlusal position.
It improves the accuracy and reliability of scanning data, optimizes multi-angle scanning efficiency, accurately records occlusal relationships, and provides a more accurate and efficient digital scanning solution for toothless jaw implantation and repair.
Smart Images
Figure CN223081784U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of dental scanning, in particular to a positioning scanning rod and a positioning scanning device for tooth agenesis or defect. Background Technique
[0002] Digital intraoral scanning is a key technology for digital impression making in oral implant restoration. It is mainly based on the principle of optical scanning. By using light sources such as lasers for intraoral projection, depth reconstruction is completed in real time, and local point cloud data is obtained. The point cloud data is fused through a point cloud registration algorithm, and then three-dimensional mesh data is generated through a reconstruction algorithm, so as to scan and record the morphology of intraoral tissues in real time. In the digital design stage of implant restoration, especially during the scanning process, a scanning rod is usually connected to an implant or its abutment to capture the three-dimensional morphology of the scanning rod, the surrounding dentition and soft tissues. And the exact three-dimensional position of the implant is calculated through these data.
[0003] In the prior art, due to the lack of teeth in edentulous patients, the soft tissues lack obvious geometric features, which limits the availability of necessary geometric features during the scanning process. Moreover, mucosal soft tissues such as the buccal and lingual sides in the mouth may introduce data noise during the scanning process. As the amount of scanning data increases, the cumulative error will gradually increase, thus reducing the scanning accuracy. Although some studies have tried to increase the auxiliary device of the scanning rod to enhance the geometric features in the soft tissue transition stage, this method has achieved certain results in improving the accuracy of edentulous implant scanning, but this accuracy still has not reached the accuracy level equivalent to that of single-tooth or multi-tooth implant restoration. The conventional implant scanning strategy usually first scans the occlusal surface of the dentition, and then scans the buccal or lingual side of the dentition. Although this method has been proven to provide high scanning accuracy in single-tooth or multi-tooth implants. However, during the scanning process of edentulous implant, since the scanning rod is usually cylindrical and mainly positioned on the side, the top scanning area is small and lacks sufficient geometric morphological features, making this conventional strategy unable to quickly and accurately obtain the three-dimensional morphology of the scanning rod.
[0004] Therefore, a positioning device is needed that can provide additional geometric features during the edentulous implant scanning process, support multi-angle scanning, and accurately record the occlusal relationship, so as to overcome the problem of insufficient accuracy in the prior art and improve the scanning efficiency. Summary of the Utility Model
[0005] The purpose of the utility model is to solve the above-mentioned disadvantages existing in the prior art, and provide a positioning scanning rod and a positioning scanning device for tooth agenesis or defect, which overcome the limitations of the lack of geometric morphology in the transition area and the cylindrical scanning rod in the above-mentioned edentulous implant restoration scanning. The purpose of the utility model can be achieved by the following technical solutions:
[0006] The present utility model provides a positioning scanning rod for tooth loss or defect, comprising:
[0007] A scanning rod body, which includes a scanning head and its connected base. A first threaded through hole is provided on the central axis of the top of the umbrella-shaped scanning head for installing a positioning pin, and it is fixed to the composite abutment of the implant through the positioning pin.
[0008] The scanning head, whose main body is of an umbrella-shaped structure. On the upper part of its side, there are symmetrically arranged positive beveled registration surfaces, which serve as the first feature surfaces. The umbrella-shaped structure is vertically cut along the arc edge at the bottom of the beveled registration surface to form a vertical plane, which serves as the second feature surface. And a second threaded through hole is provided on the vertical plane, perpendicular to the first threaded through hole, for installing an auxiliary rod.
[0009] Further, a vertical section is provided on each of the front and back surfaces of the scanning head, which serves as the third feature surface for enhancing the registration accuracy and alignment. Among them, the top and bottom of the vertical section are both curved, and intersect with the two side beveled surfaces on the same horizontal plane. The vertical plane of the vertical section is parallel to the vertical plane.
[0010] Further, the vertical section is a plane vertically cut on the umbrella-shaped structure. The straight edge of the vertical section smoothly transitions along both sides to the corresponding vertical plane to form a seamless connected curved surface structure, which serves as the fourth feature surface.
[0011] Further, the material of the scanning rod body is titanium metal, and its surface is sandblasted.
[0012] Further, the length of the scanning rod body is 8 - 12 mm, and the diameter of the base is smaller than the diameter of the scanning head.
[0013] Further, the shapes of the beveled registration surfaces include circular, square, and irregular arcs cut along the umbrella-shaped structure.
[0014] Further, the maximum diameter of the scanning head is 8 mm. The angle between the axis of the first threaded through hole and the cutting surface is an acute angle, and the minimum distance between the cutting surfaces is 6 mm.
[0015] Further, the positioning pin includes a screw rod and a nut. The screw rod is threadedly connected to the first threaded through hole, and the length of the positioning pin screwed into the scanning part is adjusted to position the occlusal position of the implant.
[0016] The present utility model also provides a positioning scanning device for tooth loss or defect, which adopts the positioning scanning rod as described above, and includes:
[0017] A positioning scanning rod, the first threaded through hole at its top is used to connect a positioning pin. By screwing in the screw rod of the positioning pin, the positioning scanning rod is fixed to the composite abutment of the implant.
[0018] The auxiliary rod is threadedly connected to the second threaded through hole on the side of the positioning scanning rod; wherein, the length of the auxiliary rod is 6 - 15 mm, and at least two identification bodies are arranged circumferentially along the auxiliary rod for auxiliary identification;
[0019] The scanner scans the identification bodies on the positioning scanning rod and the auxiliary rod through its optical sensor to complete the geometric shape capture and alignment in the positioning scanning rod and the auxiliary rod.
[0020] Compared with the prior art, the beneficial effects of the present utility model are:
[0021] In order to solve the scanning accuracy problem in edentulous implant restoration due to the lack of geometric shape in the transition area and the limitations of traditional cylindrical scanning rods, the present utility model proposes a new design of a positioning scanning rod. By adopting an umbrella-shaped scanning head, bevel cutting and vertical section structures, the geometric feature capture ability during the scanning process is enhanced, thereby improving the accuracy and reliability of the scanning data. In addition, the use of high-strength titanium metal material and precise dimension design not only ensures the durability of the device and the flexibility of operation, but also optimizes the efficiency of multi-angle scanning, enhances the capture of geometric features in the soft tissue transition area, and effectively solves the problem of the lack of geometric features commonly found in the edentulous area in traditional technologies. In addition, the positioning pin can be adjusted in height by connecting to the first threaded through hole at the top of the scanning rod to ensure correct occlusion of the upper and lower jaws. This structure enables the intraoral scanning during the edentulous implant restoration process to accurately record the occlusion relationship, provides an important occlusion reference for the design of digital virtual restorations, and effectively solves the problem of the inability to record the occlusion relationship in the prior art. These improvements make the new scanning rod have significant superiority in actual clinical applications and provide a more accurate and efficient digital scanning solution for edentulous implant restoration.
[0022] (1) Most traditional scanning rods have simple cylindrical or slightly adjustable angle structures, which often make it difficult to capture accurate data due to the lack of sufficient geometric features during the scanning of edentulous areas. To address this problem, the present utility model proposes a design of an umbrella-shaped scanning head. The top of this scanning head adopts a complex umbrella-shaped curved surface, which not only increases the geometric features on the surface, but also provides a larger contact area through its unique shape, thereby capturing more details, improving the richness of the data and the accuracy of 3D reconstruction. In addition, the umbrella-shaped structure is also equipped with a bevel cutting registration surface and a vertical section, enabling the scanning head to provide effective data capture points at different angles, enhancing the efficiency and accuracy of the scanning of edentulous areas.
[0023] (2) The positioning and scanning device in this utility model also introduces an auxiliary rod. The auxiliary rod is threadedly connected to the side of the scanning rod through a second threaded through-hole, which not only improves the stability during scanning but also enhances the recognition ability of the scanner through the recognition body on the auxiliary rod. Especially during multi-angle and all-round scanning, it ensures the precise matching and efficient processing of scanning data. At the same time, the adjustable length of the auxiliary rod provides flexible options for different oral structures, enabling the device to be quickly adjusted according to specific clinical needs, thus improving the convenience of user operation and the comfort of users. Description of the Drawings
[0024] The drawings are used to provide a further understanding of the present utility model and constitute a part of the specification. They are used together with the embodiments of the present utility model to explain the present utility model and do not constitute a limitation to the present utility model. In the drawings:
[0025] Figure 1 is the front view of the scanning rod body in Embodiment 1 of the present utility model;
[0026] Figure 2 is the structural schematic diagram of the scanning rod body in Embodiment 1 of the present utility model (where, Figure 2 a is the top view, Figure 2 b is the front view, Figure 2 c is the side view);
[0027] Figure 3 is the combined structural diagram of the positioning device in Embodiment 2 of the present utility model.
[0028] Explanation of the Reference Numerals in the Drawings
[0029] 1: Scanning rod body; 1.1: First threaded through-hole; 1.2: Oblique cutting registration surface; 1.3: Vertical cross-section; 1.4: Base part; 1.5 Second threaded through-hole; 1.6: Vertical plane; 1.7: Curved surface structure; 1.8: Scanning head;
[0030] 2: Auxiliary rod; 2.1: Recognition body. Detailed Embodiment
[0031] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of this application. Apparently, the described embodiments are some but not all of the embodiments of this application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in this application without creative efforts shall fall within the protection scope of this application.
[0032] Those skilled in the art can understand that, unless specifically stated otherwise, the singular forms "a", "an", "the" and "said" used herein may also include the plural forms. It should be further understood that the term "comprising" used in the description of the present utility model means the presence of the stated features, integers, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or groups thereof.
[0033] The following describes the specific implementation manners of the present utility model in conjunction with the accompanying drawings and embodiments.
[0034] Embodiment 1
[0035] In the process of modern oral implant and restoration, obtaining accurate intraoral three-dimensional images is crucial for successful edentulous implant restoration. Currently, most intraoral scanners rely on optical technology to scan inside the oral cavity through lasers or other light sources to obtain detailed images of implants and their surrounding soft tissues. However, for edentulous patients, since implants are usually buried under the bone and there are no reliable feature points in the oral cavity, the traditional cylindrical scanning rod 1 is difficult to provide sufficient accuracy to guide the precise positioning of implants. This is mainly because the shape and size of the traditional scanning rod limit its scanning range and feature point capture ability inside the oral cavity.
[0036] In view of these limitations of the prior art, the present utility model proposes an umbrella-shaped scanning rod, which improves the ability of the scanner to capture feature points by increasing the geometric shapes at the top and side of the scanning rod 1, thereby improving the accuracy of image reconstruction. The umbrella-shaped scanning rod not only expands the contact area with oral soft tissues, but also adds geometric marking points through its unique design. These marking points provide more spatial positioning references for the scanner, thus optimizing the data stitching and reconstruction process. In addition, the present utility model also introduces an auxiliary rod 2 that can be customized according to the implant spacing, which can be easily attached to the side of the umbrella-shaped scanning rod through a connection hole, enhancing the flexibility and accuracy of scanning. The specific implementation scheme is as follows:
[0037] As Figure 1 、 2 shown, the present utility model provides a positioning scanning rod for tooth loss or defect, including a scanning rod body 1, which includes a scanning head 1.8 and its connected base 1.4. A first threaded through hole 1.1 is provided on the central axis of the top of the umbrella-shaped scanning head 1.8 for installing a positioning pin, and it is fixed to the composite abutment of the implant through the positioning pin;
[0038] The scanning head 1.8 has an umbrella-shaped structure as its main body, with a curved surface at the top, providing richer geometric features compared to traditional flat or simple curved surfaces to enhance the capture of feature points during scanning. On its upper side, there are positively symmetric beveled registration surfaces 1.2, serving as the first feature surfaces. The umbrella-shaped structure is vertically cut along the arc-shaped edge at the bottom of the beveled registration surface to form a vertical plane 1.6, serving as the second feature surface, and there is a second threaded through-hole 1.5 on the vertical plane 1.6, perpendicular to the first threaded through-hole 1.1, for installing the auxiliary rod 2.
[0039] Specifically, the beveled registration surface 1.2, as the first feature surface, mainly serves as its mark and is used as a key reference point when the optical scanner identifies or processes the scanned data.
[0040] The second feature surface, namely the vertical plane 1.6, directly extends downward from the arc-shaped edge of the beveled registration surface 1.2, forming an obvious vertical alignment mark, enabling the scanning device to obtain precise geometric information in the vertical direction as well. This not only enhances the structural complexity of the scanning rod but also optimizes the accuracy and reliability of the scanning operations from different directions by providing an additional reference plane.
[0041] Meanwhile, the second threaded through-hole 1.5 on the second feature surface serves as the connection hole for the auxiliary tube thread, affecting the functionality and flexibility of the scanning rod during use. This threaded connection hole is located on the side of the scanning part and is perpendicular to the side of the scanning part, such that the center line of the connection hole forms a 90° angle with the vertical plane of the registration plane. Such a design ensures that the two registration planes of the scanning rod can be precisely aligned with the labial and lingual surfaces of the dental arch, which is crucial for obtaining clear and precise images during intraoral scanning.
[0042] On the front and back of the scanning head 1.8, there is a vertical section 1.3 each, serving as the third feature surface for enhancing the registration accuracy and alignment. Among them, the top and bottom of the vertical section 1.3 are both curved and intersect with the two side beveled surfaces on the same horizontal plane, and the vertical plane of the vertical section 1.3 is parallel to the vertical plane 1.6. The vertical section 1.3 is a plane vertically cut on the umbrella-shaped structure, and the straight edge of the vertical section 1.3 smoothly transitions along both sides to the corresponding vertical plane, forming a seamless curved surface structure 1.7, serving as the fourth feature surface.
[0043] Specifically, a vertical cross-section 1.3 is provided on each of the front and back sides of the scanning head 1.8 as the third feature surface, whose main function is to enhance the registration accuracy and alignment ability during the scanning process. Specifically, these vertical cross-sections 1.3 not only provide additional geometric features to support more complex point cloud processing, but also optimize the processing efficiency of the scanned data through their design. The top and bottom of each vertical cross-section 1.3 are designed in a curved shape, which helps to better simulate and adapt to the natural curves in the oral cavity, while enhancing the aesthetics and practicality of the structure. These curved edges intersect with the beveled registration surfaces 1.2 on both sides of the scanning head 1.8 at the same horizontal plane, ensuring that continuous and uniform images can be captured during the scanning process, and avoiding image distortion caused by improper registration. In addition, the vertical lines of the vertical cross-section 1.3 are designed to be parallel to the vertical lines of the vertical plane. This parallel design ensures stability and consistency in the vertical direction, which is crucial for maintaining scanning accuracy and repeatability. The position of the vertical cross-section 1.3 on the umbrella-shaped structure is a plane formed by precise vertical cutting, and this cutting technique ensures the accuracy of the surface and the symmetry of the overall structure.
[0044] The straight edges of the vertical cross-section 1.3 smoothly transition along both sides to the corresponding vertical planes, forming a seamless curved surface structure 1.7. Since this seamless curved surface structure 1.7 has no sharp corners or obvious joint lines, it reduces stress concentration points and enhances the structural strength of the scanning head 1.8. Moreover, when the optical scanner is working, the transmission and reflection characteristics of light have a great impact on the scanning quality. The curved surface structure 1.7 can change the path of light in a smoother manner, reducing light scattering and abnormal reflection caused by surface unevenness. Therefore, the curved surface structure 1.7 also optimizes the reflection and refraction during the optical scanning process, thereby improving the clarity and accuracy of the scanning.
[0045] The material of the scanning rod body 1 is titanium metal, which has high strength and excellent corrosion resistance. The surface is sandblasted, which not only enhances the wear resistance and appearance texture of the rod body, but also effectively reduces the smooth reflection during the optical scanning process, thereby improving the accuracy of image acquisition.
[0046] The length of the scanning rod body 1 is 8 - 12 mm, and the diameter of the base 1.4 is smaller than the diameter of the scanning head 1.8.
[0047] The shapes of the beveled registration surfaces 1.2 include circular, square, and irregular arcs cut along the umbrella-shaped structure.
[0048] The maximum diameter of the scanning head 1.8 is 8 mm. The angle between the axis of the first threaded through-hole 1.1 and the cutting surface is an acute angle, and the minimum distance between the cutting surfaces is 6 mm.
[0049] The positioning pin includes a screw rod and a nut. The screw rod is threadedly connected to the first threaded through-hole 1.1, and the length of the positioning pin screwed into the scanning part is adjusted to position the occlusal position of the implant.
[0050] Embodiment 2
[0051] This embodiment also provides a positioning and scanning device for edentulous or defective dentition, which realizes high-precision and reliable intraoral scanning through an integrated positioning and scanning rod and an auxiliary rod 2, including,
[0052] A positioning and scanning rod, with a first threaded through-hole 1.1 at its top, for connecting the positioning pin. By screwing in the positioning pin, the length of the screw rod passing through the scanning head 1.8 is adjusted to fix the positioning and scanning rod to the composite abutment of the implant.
[0053] An auxiliary rod 2, which is threadedly connected to the second threaded through-hole 1.5 on the side of the positioning and scanning rod. Among them, the length of the auxiliary rod 2 is 6-15 mm, and at least two identification bodies 2.1 are arranged circumferentially along the auxiliary rod 2, which are used for auxiliary identification and to adapt to the connection requirements of implants at different distances.
[0054] A scanner, which uses an optical sensor to scan the identification bodies 2.1 on the positioning and scanning rod and the auxiliary rod 2, and capture them. It can also ensure the accurate alignment of the scanning data of the positioning and scanning rod and the auxiliary rod 2 through high-precision image processing.
[0055] In practical applications, the specific usage steps for obtaining a digital impression by intraoral scanning of edentulous implant restoration or multiple tooth loss implant restoration using the technical solution of this application are as follows
[0056] According to the distance between two adjacent implant composite abutments at the end of one side of the dental arch, select an auxiliary rod 2 with an appropriate length. Then, screw the auxiliary rod 2 into the umbrella-shaped scanning rod body 1 outside the mouth, and then install the umbrella-shaped scanning rod body 1 to the most distal composite abutment. Use a screwdriver to tighten the central screw to ensure the stable installation of the scanning rod body 1. Install other umbrella-shaped scanning rod bodies 1 in the same way. After installation, dry the oral mucosa and try to suck out the saliva in the mouth as much as possible. Start intraoral scanning according to the scanning program of the intraoral scanner.
[0057] During intraoral scanning, insert the optical scanning head of the intraoral scanner into the occlusal surface where the most distal umbrella-shaped scanning rod body 1 is located, scan it to obtain the local point cloud data of the scanning rod body 1. Through the mutual cooperation of the scanning rod body 1 and the auxiliary rod 2, move the intraoral scanner to obtain continuous point cloud data, and perform local three-dimensional reconstruction and splicing on the obtained point cloud data to obtain the overall three-dimensional data of the occlusal surface where the entire dentition scanning rod body 1 is located.
[0058] After completing the preliminary scan, the acquired three-dimensional data is fixed as the frame data for subsequent operations, and the scanning of the buccal and lingual sides of the scanning rod body 1 and the auxiliary rod 2 is continued to ensure full coverage of all necessary areas.
[0059] Obviously, those skilled in the art can make various changes and modifications to the utility model without departing from the spirit and scope of the utility model. Thus, if these modifications and variations of the utility model fall within the scope of the claims of the utility model and their equivalent technologies, the utility model is also intended to include these modifications and variations.
[0060] Finally, it should be noted that the above are only the preferred embodiments of the utility model and are not used to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included within the protection scope of the utility model.
Claims
1. A positioning scanning rod for edentulous or defective dentition, characterized in that, Comprising: A scanning rod body, which includes a scanning head and its connected base portion. A first threaded through hole is provided on the central axis of the top of the scanning head for installing a positioning pin, and is fixed to the composite abutment of the implant through the positioning pin; The scanning head, whose main body is an umbrella-shaped structure. There are forward-symmetrical beveled registration surfaces on the upper part of its side, serving as the first feature surface. The umbrella-shaped structure is vertically cut along the arc edge at the bottom of the beveled registration surface to form a vertical plane, serving as the second feature surface. And there is a second threaded through hole on the vertical plane, perpendicular to the first threaded through hole, for installing an auxiliary rod.
2. The positioning and scanning rod according to claim 1, wherein There is a vertical section on the front and back of the scanning head respectively, serving as the third feature surface for enhancing the registration accuracy and alignment. Among them, the top and bottom of the vertical section are both curved, and intersect with the two side beveled surfaces on the same horizontal plane. The vertical plane of the vertical section is parallel to the vertical plane.
3. The positioning and scanning rod according to claim 2, characterized in that, The vertical section is a plane vertically cut on the umbrella-shaped structure. The straight edge of the vertical section smoothly transitions along both sides to the corresponding vertical plane, forming a seamless connection curved surface structure, serving as the fourth feature surface.
4. The positioning and scanning rod according to claim 1, wherein, The material of the scanning rod body is titanium metal, and its surface is sandblasted.
5. The positioning and scanning rod according to claim 1, characterized in that, The length of the scanning rod body is 8 - 12 mm, and the diameter of the base portion is smaller than the diameter of the scanning head.
6. The positioning and scanning rod according to claim 1, characterized in that, The shapes of the beveled registration surfaces include circular, square, and irregular arcs cut along the umbrella-shaped structure.
7. The positioning and scanning rod according to claim 1, characterized in that, The maximum diameter of the scanning head is 8 mm. The angle between the axis of the first threaded through hole and the cutting plane is an acute angle, and the minimum distance between the cutting planes is 6 mm.
8. The positioning and scanning rod according to claim 1, wherein, The positioning pin includes a screw rod and a nut. The screw rod is threadedly connected to the first threaded through hole, and the length of the positioning pin screwed into the scanning part is adjusted to position the occlusal position of the implant.
9. A positioning and scanning device for tooth loss or defect, which adopts the positioning and scanning rod described in any one of claims 1 to 8, characterized in that, Comprising, A positioning scanning rod, whose first threaded through hole at the top is used to connect a positioning pin. By screwing in the screw rod of the positioning pin, the positioning scanning rod is fixed to the composite abutment of the implant; An auxiliary rod, which is threadedly connected to the second threaded through hole on the side of the positioning scanning rod; among them, the length of the auxiliary rod is 6 - 15 mm, and at least two identification bodies are arranged circumferentially along the auxiliary rod for auxiliary identification; A scanner, which scans the identification bodies on the positioning scanning rod and the auxiliary rod through its optical sensor to complete the geometric shape capture and alignment of the positioning scanning rod and the auxiliary rod.