Umbrella-type scanning and positioning device used for edentulous jaw implantation and restoration

Abstract

The invention provides an umbrella-type scanning positioning device, which is used for an edentulous jaw implantation repair device, and comprises a scanning rod body, the scanning rod body comprises an umbrella-shaped scanning part and a cylindrical connecting part connected with the umbrella-shaped scanning part, a curved surface is arranged at the top of the umbrella-shaped scanning part, two cutting surfaces are oppositely arranged on two sides of the umbrella-shaped scanning part, the two cutting surfaces extend to the curved surface, and the cylindrical connecting part is connected with the cylindrical connecting part; a first threaded hole is formed in the center of the curved surface, a second threaded hole is formed in one side of the umbrella-shaped scanning part, and the first threaded hole and the second threaded hole are perpendicular to the auxiliary rod and are in threaded connection with the auxiliary rod. The problems that in edentulous jaw implantation repair scanning, there is no geometrical morphology of a transition area and a cylindrical scanning rod is limited can be solved, the top end and the side face of the umbrella type scanning rod are both in geometrical morphology, the side face of the scanning rod is connected with auxiliary rods of various lengths and shapes, and adjustment is conducted according to the position of an implant in the oral cavity of a patient; and geometric feature capture of the soft tissue transition area is enhanced.

Description

Technical Field

[0001] The invention relates to the field of intraoral scanning for implant restoration, and in particular to an umbrella-type scanning positioning device, and a device for implant restoration of edentulous jaws. Background Art

[0002] Digital intraoral scanning is a key technology for the production of digital impressions for oral implant restoration. This technology is based on the principle of optical scanning, uses laser and other light sources for intraoral projection, completes deep reconstruction in real time, obtains local point cloud data, fuses point cloud data using point cloud registration algorithms, and then uses reconstruction algorithms to generate three-dimensional grid data to scan the morphology of intraoral tissues in real time. In the digital design stage of implant restoration, the scanning rod is connected to the implant or implant base for scanning to obtain the three-dimensional morphology of the scanning rod, surrounding dentition and soft tissue. And the exact three-dimensional position of the implant is calculated through these data.

[0003] In the prior art, since the scanning rod is usually cylindrical and mainly positioned on the side, the top scanning area is small and lacks sufficient geometric features, this conventional strategy cannot quickly and accurately obtain the three-dimensional shape of the scanning rod. Summary of the invention

[0004] The purpose of the present invention is to solve the above technical problems and propose an umbrella type scanning and positioning device. The purpose of the present invention can be achieved through the following technical solutions:

[0005] An umbrella type scanning and positioning device comprises at least one positioning body, the positioning body comprising:

[0006] A scanning rod body, comprising an umbrella-shaped scanning portion and a connecting portion connected to the umbrella-shaped scanning portion, wherein the top of the umbrella-shaped scanning portion further comprises a first top surface, a first cutting surface and a second cutting surface with geometric features arranged along two sides of the first top surface, the first cutting surface and the second cutting surface are respectively extended to the first top surface, and the first cutting surface / the second cutting surface and the first top surface have a clear intersection line, and the first top surface, the first cutting surface / the second cutting surface and the intersection line constitute a multi-anisotropic shape of the top, so that the scanning rod body can be identified and / or located from the top direction of the body when being scanned intraorally;

[0007] An auxiliary rod disposed on the side of the scanning body is configured to capture the features of the soft tissue transition zone of the implant according to the position adjustment of the implant in the oral cavity.

[0008] The first top surface is set as a first curved surface with a middle height inclined toward the periphery, the first cutting surface and the second cutting surface are respectively smooth beveled surface features, and the first cutting surface and the second cutting surface respectively intersect with the first curved surface to form a clear arc-shaped intersection line, and the first curved surface, the two symmetrical beveled surfaces, and the clear arc-shaped intersection lines The geometric features formed by these geometric features are configured to form a corresponding point cloud in the scanned three-dimensional space for rapid identification / positioning.

[0009] A radial hole radially passes through one side of the umbrella-shaped scanning part, and the auxiliary rod is fixed to the side of the scanning rod body through the hole. An axial hole is axially arranged in the middle of the first top surface of the umbrella-shaped scanning part, and a positioning pin is arranged in the axial hole. The positioning pin is screwed into the length of the scanning body to realize the engagement position of the positioning seed value body.

[0010] The scanning rod body includes a first side surface provided with a radial hole, a second side surface arranged corresponding to the first side surface, a third side surface, and a fourth side surface. The third side surface is arranged opposite to the fourth side surface. The first side surface, the second side surface and the third side surface / the fourth side surface have an omnitropic shape so that the intraoral scanning is configured to have different data capture capabilities in the directions corresponding to these side surfaces.

[0011] The auxiliary rod is in the shape of a rod, including a bottom and a side. A first identification body with a regular geometric shape is arranged at the bottom, and a second identification body with a different geometric shape is arranged at the side. When the auxiliary rod is arranged on the side of the scanning body, the different shapes composed of the first identification body, the second identification body and the scanning rod body enable the intraoral scanning to be configured with different data capture capabilities in the directions corresponding to different sides.

[0012] The positioning bodies include multiple ones, each of which includes a scanning rod body and an auxiliary rod. The auxiliary rods have various lengths. The positioning bodies are configured to use auxiliary rods of matching lengths according to the connection requirements of implants at different distances.

[0013] The scanning rod body and the auxiliary rod are made of titanium metal, and the surface of the titanium metal is sandblasted.

[0014] The length of the scanning rod body is 8-12 mm, and the diameter of the scanning rod is smaller than the diameter of the scanning head body.

[0015] The cutting surface of the umbrella-shaped scanning portion is set to be square or circular, wherein the diameter of the circular umbrella-shaped scanning portion is 8 mm, and the minimum distance between the two cutting surfaces is 6 mm.

[0016] The second threaded hole is coaxial with the auxiliary rod, and the length of the auxiliary rod includes three specifications: 6mm, 10mm, and 15mm. The auxiliary rod is cylindrical as a whole, and the first identification body is circular, triangular or quadrilateral, and the cross-sectional diameter of the first identification body is 4mm.

[0017] An umbrella-type scanning and positioning device for edentulous jaw implant restoration comprises a plurality of positioning bodies, wherein each positioning body comprises a scanning rod body and an auxiliary rod arranged on the side of the scanning body, the auxiliary rod is selected to have an adaptive length according to the distance between two adjacent implant composite bases, the scanning rod body is configured to be mounted on the composite base of each implant, and:

[0018] The scanning rod body of each positioning body comprises an umbrella-shaped scanning part and a connecting part connected to the umbrella-shaped scanning part, the top of the umbrella-shaped scanning part further comprises a first top surface, a first cutting surface and a second cutting surface with geometric features arranged along two sides of the first top surface, the first cutting surface and the second cutting surface are respectively extended to the first top surface, and the first cutting surface / the second cutting surface and the first top surface have a clear intersection line, the first top surface, the first cutting surface / the second cutting surface and the intersection line constitute a multi-anisotropic shape of the top, so that the scanning rod body can be identified and / or located from the top direction of the body when being scanned intraorally;

[0019] An auxiliary rod disposed on the side of the scanning body is configured to capture the features of the soft tissue transition zone of the implant according to the position adjustment of the implant in the oral cavity.

[0020] A radial hole radially passes through one side of the umbrella-shaped scanning part, and the auxiliary rod is fixed to the side of the scanning rod body through the hole. An axial hole is axially arranged in the middle of the first top surface of the umbrella-shaped scanning part, and a positioning pin is arranged in the axial hole. The positioning pin is screwed into the length of the scanning body to realize the engagement position of the positioning seed value body.

[0021] The length of the scanning rod body is 8-12 mm, and the diameter of the scanning rod is smaller than the diameter of the scanning head body. The cutting surface of the umbrella-shaped scanning part is set to be square or circular, wherein the diameter of the circular umbrella-shaped scanning part is 8 mm, and the minimum distance between the two cutting surfaces is 6 mm.

[0022] The present invention provides another umbrella-type scanning and positioning device, comprising at least one positioning body, the positioning body comprising:

[0023] A scanning rod body, comprising an umbrella-shaped scanning portion and a connecting portion connected to the umbrella-shaped scanning portion, wherein the top of the umbrella-shaped scanning portion further comprises a first top surface, a first cutting surface with geometric features arranged along the first top surface, the first cutting surface extends to the first top surface, and the first cutting surface and the first top surface have a clear intersection line, the first top surface, the first cutting surface and the intersection line constitute a multi-tropic anisotropic morphology of the top, so that the scanning rod body can be identified and / or located from the top direction of the body when being scanned intraorally.

[0024] Compared with the prior art, the present invention has at least one of the following technical effects:

[0025] The present invention proposes an umbrella-type scanning and positioning device, which solves the problem of the lack of geometric form of the transition area and the limitation of the cylindrical scanning rod in the scanning of implant restoration. The top and side of the umbrella-type scanning rod have geometric forms, which optimize the data capture ability of the scanner in all directions and ensure high-precision scanning output. The side of the scanning rod is connected to auxiliary rods of various lengths and shapes, which are adjusted according to the position of the implant in the patient's mouth, thereby enhancing the capture of geometric features of the soft tissue transition zone. In addition, the scanning and positioning device of the present invention and its scanning registration not only improve the scanning quality of edentulous jaw implant restoration, but also simplify the operation process, making the digital processing of full-dentition implant restoration more efficient and accurate. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solution of the embodiment of the present invention, the following is a brief introduction to the drawings required for describing the embodiment:

[0027] Figure 1 is a combined structural diagram of a positioning device in Embodiment 1 of the present invention;

[0028] Figure 2 Schematic diagram of the structure of the scanning rod body in Example 1 of the present invention (wherein, Figure 2 a is the top view, Figure 2 b is the front view, Figure 2 c is a side view);

[0029] Figure 3 This is a front view of the scanning rod body in Example 1 of the present invention;

[0030] Figure 4 is a schematic structural diagram of an auxiliary rod in Embodiment 1 of the present invention;

[0031] Figure 5 This is a flowchart of the steps of the umbrella scanning positioning method in Example 2 of the present invention.

[0032] Description of Reference Numerals

[0033] 1: scanning rod; 1.1: first threaded hole; 1.2: cutting surface; 1.3: scanning part; 1.4: connecting part; 1.5: second threaded hole;

[0034] 2: Auxiliary rod; 2.1: Identification body; 2.2: Auxiliary rod thread. DETAILED DESCRIPTION

[0035] The present invention will be described below with reference to specific embodiments and with reference to certain drawings, but the invention is not limited thereto. Any drawings described are only schematic and non-limiting. In the drawings, for illustrative purposes, the size of some elements may be exaggerated and not drawn to scale. The sizes and relative sizes do not necessarily correspond to actual examples of implementing the present invention.

[0036] Furthermore, the terms first, second, third and the like in the description and claims are used to distinguish between similar elements and not necessarily to describe a sequential or chronological order. The terms are interchangeable under appropriate circumstances and the embodiments of the invention can operate in other sequences than described or illustrated herein.

[0037] Furthermore, the terms "top", "bottom", "upper", "lower", "side", "lateral", etc. in the description and claims are used for descriptive purposes and not necessarily for describing relative positions. The terms so used are interchangeable under appropriate circumstances, and the embodiments of the invention described herein can operate in other orientations than described or illustrated herein.

[0038] The term "comprising" used in the claims should not be interpreted as being limited to the means listed thereafter; it does not exclude other elements or steps. It needs to be interpreted as specifying the presence of stated features, integers, steps or components, but does not exclude the presence or addition of one or more other features, integers, steps or components or groups thereof. Thus, the scope of the expression "a means comprising means A and B" should not be limited to a means consisting only of components A and B, which means that with respect to the present invention the only relevant components of the means are A and B.

[0039] In the context of the present invention, a marker is understood to include any 2D or 3D geometric object capable of defining a predetermined reference point, the coordinates of which can be determined. The types of suitable markers are essentially unlimited. Preferred markers have regular geometric shapes, because the predetermined reference point of the marker can be easily defined, or can even be intuitive. Suitable markers can be, for example, equilateral triangles, squares, rectangles, circles or regular polygons, where, for example, the center point can be considered as a predetermined reference point. Suitable markers can also be line segments, where points can be considered as predetermined reference points. Suitable 3D markers can be, for example, spheres, hemispheres or cubes, the center point of which can then be considered as a predetermined reference point. The applicant has found that the size and shape of the marker can be different within a very wide range, and markers of different shapes and / or sizes can be used as part of the same pattern. The applicant has found that the contrast between the marker and its surroundings can be further enhanced by adding a strongly contrasting edge around the marker.

[0040] In the context of the present invention, pre-calibration is understood to mean the recognition process, including its results, that the recognition technology is applied to connect to a given type of implant or various implants in a clinical situation in order to obtain all the information necessary to retrieve the position and orientation of the implant from the pattern formed by the markings as part of the scanning positioning. The information thus collected forms the reference information in the process of associating the implant type or equivalent in the clinical situation presented in the oral cavity in the visualization mode.

[0041] In the context of the present invention, a "vector" of a dental implant or implant root is defined as spatial information that first defines the orientation axis of the dental implant root. The carrier also includes the position of the top of the dental implant root along the orientation axis. Thus, the top is defined as the face to which the implant root height corresponds.

[0042] The creation process of the present invention is described.

[0043] The inventors of the present invention have found through clinical research that the current intraoral scanning technology faces the problem of insufficient accuracy in the application of edentulous jaw scanning. Due to the lack of teeth in edentulous jaw patients, the soft tissue lacks obvious geometric features, which limits the availability of necessary geometric features during the scanning process. Secondly, the mucosal soft tissues such as the buccal and lingual sides of the mouth may introduce data noise during the scanning process. As the amount of scanned data increases, the cumulative error will gradually increase, further reducing the accuracy of the scan. Although some studies have tried to enhance the geometric features of the soft tissue transition stage by adding auxiliary devices to the scanning rod, this method has achieved certain results in improving the accuracy of edentulous jaw implant scanning, but it has not yet reached the same accuracy level as single-tooth or multi-tooth implant restorations. In addition, the conventional implant scanning strategy is usually to scan the maxillary surface of the dentition first, and then scan the buccal or lingual side of the dentition. This method has been proven to provide higher scanning accuracy in single-tooth or multi-tooth implants. The soft tissue transition zone of the tooth usually refers to the morphology of the internal structure of the soft tissue between the tooth and the restoration. In natural teeth and crown restorations, this area is the part between the root and the crown contour. For implant restorations, this transition zone refers to the portion of the restoration abutment extending from the implant neck to the edge of the soft tissue.

[0044] In modern oral implant and restoration processes, obtaining accurate intraoral three-dimensional images is crucial for the implementation of successful edentulous implant restorations. Currently, most intraoral scanners rely on optical technology to scan 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 geometric feature points in the oral cavity, traditional cylindrical scanning rods often have difficulty providing sufficient accuracy to guide the precise positioning of implants. This is mainly because the shape and size of traditional scanning rods limit their scanning range and feature point capture capabilities in the mouth.

[0045] In view of these limitations of the prior art, the present invention proposes an umbrella-type scanning and positioning device, which improves the ability of the scanner to capture feature points by at least increasing the geometric shape of the top of the scanning rod 1, thereby improving the accuracy of image reconstruction. During the experiment, the umbrella-type scanning and positioning device can be used not only in the application scenario of tooth loss, but also in the special application scenario involving edentulous jaw implant restoration.

[0046] First embodiment

[0047] In this example, the scanning positioning device increases the geometric shape of the top, and preferably, also increases the geometric shape of the side, to enhance the scanner's ability to capture feature points, thereby improving the accuracy of image reconstruction. The umbrella-shaped scanning rod not only expands the contact area with the oral soft tissue, but also increases geometric markers through its unique design. These markers provide more spatial positioning references for the scanner, thereby optimizing the data splicing and reconstruction process. In addition, the present invention 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 1 through the connecting hole, thereby enhancing the flexibility and accuracy of the scanning. The specific implementation plan is as follows:

[0048] like Figures 1 to 4 As shown, the present invention provides an umbrella-type scanning and positioning device, including at least one positioning body 10, the positioning body 10 includes:

[0049] A scanning rod body, comprising an umbrella-shaped scanning part 1 and a connecting part 3 connected to the umbrella-shaped scanning part 1. The umbrella-shaped scanning part 1 and the connecting part 3 are made in one piece, and the connecting part 3 can be cylindrical. The top of the umbrella-shaped scanning part 1 further comprises a first top surface 13, a first cutting surface 12 and a second cutting surface 14 with geometric features arranged along both sides of the first top surface 13, the first cutting surface 12 and the second cutting surface 14 are respectively extended to the first top surface 13, and the first cutting surface 12 / the second cutting surface 14 have clear intersection lines 121, 141 with the first top surface 13, the first top surface 13, the first cutting surface 12 / the second cutting surface 14 and the intersection lines 121, 141 constitute a multi-anisotropic shape of the top, so that the scanning rod body can be identified and / or located from the top direction of the body when being scanned intraorally;

[0050] An auxiliary rod 2 disposed on the side of the scanning body is configured to capture the features of the soft tissue transition zone of the implant according to the position adjustment of the implant in the oral cavity.

[0051] In this example, an axial through hole 11 is also provided on the first top surface 13, and a positioning pin (not shown in the figure) can be provided in the axial hole 11, and the positioning pin is screwed into the length of the scanning body to realize the occlusal position of the positioning seed value body. The top of the umbrella-shaped scanning part 1 has a spatial morphological structure. The axial through hole 11 of the first top surface 13 is located at a middle high position, and a plurality of peripheral surfaces 131, 132 are arranged obliquely toward the periphery. In this example, the plurality of peripheral surfaces 131, 132 are a curved surface, which is a first curved surface, that is, the first top surface 13 is arranged as a first curved surface obliquely toward the periphery from the middle high position, the first cutting surface 12 and the second cutting surface 14 are respectively smooth beveled surface features, and the first cutting surface 12 and the second cutting surface 14 intersect with the first curved surface respectively to form clear arc intersection lines 131, 132, the first curved surface, the two symmetrical beveled surfaces, and the clear arc intersection lines formed by these geometric features are configured to form a corresponding point cloud in the three-dimensional space of the scan to be quickly identified / positioned.

[0052] A radial hole 15 radially penetrates one side of the umbrella-shaped scanning part, and the auxiliary rod 2 is fixed to the side of the scanning rod body through the hole. An axial hole 11 is axially arranged in the middle of the first top surface 13 of the umbrella-shaped scanning part, and a positioning pin is arranged in the axial hole 11. The positioning pin is screwed into the length of the scanning body to realize the engagement position of the positioning seed value body.

[0053] The scanning rod body 1 includes a first side surface 151 with a radial hole, a second side surface (not marked in the figure) arranged corresponding to the first side surface 151, a third side surface 152, and a fourth side surface (not marked in the figure) arranged opposite to the third side surface. The first side surface 151, the second side surface and the third side surface 152 / the fourth side surface have an omnitropic shape so that the intraoral scanning is configured to have different data capture capabilities in the directions corresponding to these side surfaces.

[0054] The auxiliary rod is in the shape of a rod, including a bottom 21 and a side 22. A first identification body 211 with a regular geometric shape is arranged on the bottom 21, and a second identification body 221 with a different geometric shape is arranged on the side 22. The first identification body 21 can be a pattern, a geometric shape or a color. In the present embodiment, the first identification body 211 is identified by the geometric shape of the bottom, which can be a circle, an ellipse, or a triangle. The side 22 of the auxiliary rod can be set with a variety of length specifications as needed. For this reason, the second identification body 221 can be set with a plurality of three-dimensional identification units according to the length, and the identification unit can be a small cylindrical unit with morphological characteristics.

[0055] When the auxiliary rod is arranged on the side of the scanning body, the first identification body, the second identification body and the scanning rod body form different forms, so that the intraoral scanning is configured with different data capture capabilities in the directions corresponding to different sides.

[0056] When performing point cloud registration, the present invention uses the curved surface at the top of the umbrella-shaped scanning rod 1, the two cutting surfaces 12, 14, and the clear edges 121, 141 of the cutting surfaces 12, 14 as key feature points to match the corresponding geometric features preset in the CAD model, thereby greatly reducing the registration error. At the same time, the need for repeated scanning is also reduced. For example, the curved surface of the umbrella-shaped scanning rod 1 is a hemispherical or similar curved surface, which provides a continuous geometric feature. Compared with the conventional cylindrical scanning rod 1, this curved surface forms a unique point cloud morphology in three-dimensional space. Therefore, during the scanning process, the point cloud generated by the curved surface can be quickly recognized by the software due to its unique curvature and aligned with the corresponding curved surface features in the CAD model, which greatly improves the accuracy of the overall scanning. Secondly, the two cutting surfaces 12, 14 on the umbrella-shaped scanning rod 1 are planes, which form obvious straight line boundaries in the point cloud, and these boundaries are easily recognized in three-dimensional space. The edges of the cutting surfaces 12, 14 form clear straight lines in the point cloud data, and in the registration algorithm, these straight line edges can be used as a reference for positioning and error correction. Finally, the identification body 21 on the auxiliary rod 2 serves as an auxiliary reference point, and its recognition in the point cloud provides additional support for the registration process. Especially in complex or feature-missing areas, the shape of the identification body 21 can significantly improve the speed and accuracy of recognition and registration.

[0057] When multiple teeth are missing, the positioning bodies may include multiple ones, each of which includes a scanning rod body and an auxiliary rod. The auxiliary rods have various lengths. The positioning bodies are configured with auxiliary rods of suitable lengths according to the requirements of implant connection at different distances.

[0058] The scanning rod 1 body 1 includes umbrella-shaped scanning parts 12, 14 and a columnar connecting part 16 connecting the umbrella-shaped scanning parts, wherein a curved surface is provided on the top of the umbrella-shaped scanning part, providing richer geometric features than traditional planes or simple curved surfaces to enhance the ability to capture feature points during scanning. Two cutting surfaces are arranged opposite to each other on both sides of the umbrella-shaped scanning part 1, and both cutting surfaces extend to the curved surface. These cutting surfaces enhance the accuracy of spatial positioning through their structure of extending to the curved surface.

[0059] In addition, the axial hole provided at the center of the curved surface at the top of the umbrella-shaped scanning portion 1.3 may be a first threaded hole for receiving a positioning pin, and the angle between its axis and the cutting surface may be an acute angle. A radial hole provided on one side of the umbrella-shaped scanning portion may be a second threaded hole, and the first threaded hole and the second threaded hole may be perpendicular;

[0060] The scanning rod 1 body and the auxiliary rod 2 are made of titanium metal and are sandblasted without a reflective layer. The length of the scanning rod 1 body is 8 to 12 mm, and the diameter of the scanning rod 1 is smaller than the diameter of the scanning head body. The minimum distance between the two cutting surfaces 1.2 is 6 mm. The cutting surface setting of the umbrella-shaped scanning part 1.3 includes but is not limited to square or circular, wherein the diameter of the circular umbrella-shaped scanning part 1.3 is 8 mm. The first threaded hole 1.1 is coaxial with the auxiliary rod 2, and the length of the auxiliary rod 2 includes 6 mm, 10 mm, and 15 mm, which can meet the connection requirements of implants at different distances.

[0061] The auxiliary rod 2 is threadedly connected to the second threaded hole. The auxiliary rod 2 is cylindrical in shape and is provided with at least two identification bodies. The identification bodies can be circular, triangular or quadrilateral, and the diameter of the identification bodies can be 4 mm. The design of these identification bodies not only helps the scanner to better identify and locate, but also provides additional visual and data reference points, making image reconstruction more accurate.

[0062] The positioning pin includes a screw rod and a nut, the screw rod is threadedly connected to the first threaded hole, and the occlusal position of the positioning implant is achieved by adjusting the length of the positioning pin screwed into the scanning part.

[0063] Second embodiment

[0064] When one tooth is missing or the space is limited, the present invention can provide an umbrella-type scanning positioning device with only a scanning rod body, which at least includes a positioning body, and the positioning body includes:

[0065] A scanning rod body, comprising an umbrella-shaped scanning portion and a connecting portion connected to the umbrella-shaped scanning portion, wherein the top of the umbrella-shaped scanning portion further comprises a first top surface, a first cutting surface with geometric features arranged along the first top surface, the first cutting surface extends to the first top surface, and the first cutting surface and the first top surface have a clear intersection line, the first top surface, the first cutting surface and the intersection line constitute a multi-tropic anisotropic morphology of the top, so that the scanning rod body can be identified and / or located from the top direction of the body when being scanned intraorally.

[0066] The scanning and positioning device increases the geometric shape of the top, and sets the entire top as a multi-morphological space. It has a first top surface with a geometric shape, a first cutting surface with a different geometric shape, and the first cutting surface and the first top surface have a clear intersection line. Through the above-mentioned core features, the scanner's ability to capture feature points is very conveniently improved, thereby improving the accuracy of image reconstruction.

[0067] Third embodiment

[0068] An umbrella-type scanning and positioning device for edentulous jaw implant restoration comprises a plurality of positioning bodies, wherein each positioning body comprises a scanning rod body and an auxiliary rod arranged on the side of the scanning body, the auxiliary rod is selected to have an adaptive length according to the distance between two adjacent implant composite bases, the scanning rod body is configured to be mounted on the composite base of each implant, and:

[0069] The scanning rod body of each positioning body comprises an umbrella-shaped scanning part and a connecting part connected to the umbrella-shaped scanning part, the top of the umbrella-shaped scanning part further comprises a first top surface, a first cutting surface and a second cutting surface with geometric features arranged along two sides of the first top surface, the first cutting surface and the second cutting surface are respectively extended to the first top surface, and the first cutting surface / the second cutting surface and the first top surface have a clear intersection line, the first top surface, the first cutting surface / the second cutting surface and the intersection line constitute a multi-anisotropic shape of the top, so that the scanning rod body can be identified and / or located from the top direction of the body when being scanned intraorally;

[0070] An auxiliary rod disposed on the side of the scanning body is configured to capture the features of the soft tissue transition zone of the implant according to the position adjustment of the implant in the oral cavity.

[0071] An umbrella-type scanning and positioning device for edentulous jaw implant restoration, wherein a radial hole radially penetrates one side surface of the umbrella-shaped scanning portion, the auxiliary rod is fixed to the side surface of the scanning rod body through the hole, an axial hole is axially arranged in the middle of the first top surface of the umbrella-shaped scanning portion, a positioning pin is arranged in the axial hole, and the positioning pin is screwed into the length of the scanning body to realize the occlusal position of the positioning implant body.

[0072] The length of the scanning rod body is 8 to 12 mm, and the diameter of the scanning rod is smaller than the diameter of the scanning head body. The cutting surface of the umbrella-shaped scanning part is set to be square or circular, wherein the diameter of the circular umbrella-shaped scanning part is 8 mm, and the minimum distance between the two cutting surfaces is 6 mm.

[0073] Other features are similar to those of the first embodiment and will not be described in detail here.

[0074] In practical applications, such as Figure 5 As shown, the specific steps of using the technical solution of the present application to perform intraoral scanning to obtain a digital impression of an edentulous jaw implant restoration or a multi-tooth missing implant restoration are as follows

[0075] According to the distance between the two adjacent implant composite bases at the end of one side of the dental arch, select the auxiliary rod 2 of appropriate length, then screw the auxiliary rod 2 into the umbrella scanning rod 1 outside the mouth, and then install the umbrella scanning rod 1 to the farthest composite base, and use a screwdriver to tighten the central screw to ensure that the scanning rod 1 is firmly installed. The other umbrella scanning rods 1 are installed in the same way. After installation, blow dry the intraoral mucosa, absorb as much saliva as possible, and start intraoral scanning according to the scanning program of the intraoral scanner.

[0076] During intraoral scanning, the optical scanning head of the intraoral scanner is inserted into the maxillary face of the farthest umbrella-shaped scanning rod 1 to scan it, and local point cloud data of the scanning rod 1 is obtained. Through the cooperation between the scanning rod 1 and the auxiliary rod 2, the intraoral scanner is moved to obtain continuous point cloud data. The obtained point cloud data is locally reconstructed and spliced ​​to obtain the overall three-dimensional data of the maxillary face of the full dentition scanning rod 1.

[0077] After the initial scan is completed, the acquired 3D data is fixed and used as the framework data for subsequent operations to continue scanning the buccal and lingual sides of the scanning rod 1 and the auxiliary rod 2 to ensure that all necessary areas are fully covered.

[0078] Although the present invention has been disclosed as above in the form of a preferred embodiment, it is not intended to limit the present invention. Any person skilled in the art may make possible changes and modifications to the technical solution of the present invention by using the methods and technical contents disclosed above without departing from the spirit and scope of the present invention. Therefore, any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention shall fall within the protection scope of the technical solution of the present invention.

Claims

1. An umbrella type scanning and positioning device, It is characterized in that At least one positioning body is included, and the positioning body includes: A scanning rod body, comprising an umbrella-shaped scanning portion and a connecting portion connected to the umbrella-shaped scanning portion, wherein the top of the umbrella-shaped scanning portion further comprises a first top surface, a first cutting surface and a second cutting surface with geometric features arranged along two sides of the first top surface, the first cutting surface and the second cutting surface are respectively extended to the first top surface, and the first cutting surface / the second cutting surface and the first top surface have a clear intersection line, and the first top surface, the first cutting surface / the second cutting surface and the intersection line constitute a multi-anisotropic shape of the top, so that the scanning rod body can be identified and / or located from the top direction of the body when being scanned intraorally; An auxiliary rod disposed on the side of the scanning body is configured to capture the features of the soft tissue transition zone of the implant according to the position adjustment of the implant in the oral cavity.

2. The umbrella type scanning and positioning device according to claim 1, It is characterized in that The first top surface is set as a first curved surface with a middle height inclined toward the periphery, the first cutting surface and the second cutting surface are respectively smooth beveled surface features, and the first cutting surface and the second cutting surface respectively intersect with the first curved surface to form a clear arc-shaped intersection line, and the first curved surface, the two symmetrical beveled surfaces, and the clear arc-shaped intersection lines The geometric features formed by these geometric features are configured to form a corresponding point cloud in the scanned three-dimensional space for rapid identification / positioning.

3. The umbrella type scanning and positioning device according to claim 1, It is characterized in that A radial hole radially passes through one side of the umbrella-shaped scanning part, and the auxiliary rod is fixed to the side of the scanning rod body through the hole. An axial hole is axially arranged in the middle of the first top surface of the umbrella-shaped scanning part, and a positioning pin is arranged in the axial hole. The positioning pin is screwed into the length of the scanning body to realize the engagement position of the positioning seed value body.

4. The umbrella type scanning and positioning device as claimed in claim 3, It is characterized in that The scanning rod body includes a first side surface provided with a radial hole, a second side surface arranged corresponding to the first side surface, a third side surface, and a fourth side surface. The third side surface is arranged opposite to the fourth side surface. The first side surface, the second side surface and the third side surface / the fourth side surface have an omnitropic shape so that the intraoral scanning is configured to have different data capture capabilities in the directions corresponding to these side surfaces.

5. The umbrella type scanning and positioning device according to claim 1, It is characterized in that The auxiliary rod is in the shape of a rod, including a bottom and a side. A first identification body with a regular geometric shape is arranged at the bottom, and a second identification body with a different geometric shape is arranged at the side. When the auxiliary rod is arranged on the side of the scanning body, the different shapes composed of the first identification body, the second identification body and the scanning rod body enable the intraoral scanning to be configured with different data capture capabilities in the directions corresponding to different sides.

6. The umbrella type scanning and positioning device as claimed in claim 5, It is characterized in that The positioning bodies include multiple ones, each of which includes a scanning rod body and an auxiliary rod. The auxiliary rods have various lengths. The positioning bodies are configured to use auxiliary rods of matching lengths according to the connection requirements of implants at different distances.

7. The umbrella type scanning and positioning device according to claim 1, It is characterized in that The scanning rod body and the auxiliary rod are made of titanium metal, and the surface of the titanium metal is sandblasted.

8. The umbrella type scanning and positioning device according to claim 1, It is characterized in that The length of the scanning rod body is 8-12 mm, and the diameter of the scanning rod is smaller than the diameter of the scanning head body.

9. The umbrella type scanning and positioning device according to claim 1, It is characterized in that The cutting surface of the umbrella-shaped scanning portion is set to be square or circular, wherein the diameter of the circular umbrella-shaped scanning portion is 8 mm, and the minimum distance between the two cutting surfaces is 6 mm.

10. The umbrella type scanning and positioning device according to claim 1, It is characterized in that The second threaded hole is coaxial with the auxiliary rod, and the length of the auxiliary rod includes three specifications: 6mm, 10mm, and 15mm. The auxiliary rod is cylindrical as a whole, and the first identification body is circular, triangular or quadrilateral, and the cross-sectional diameter of the first identification body is 4mm.

11. An umbrella-type scanning and positioning device for edentulous jaw implant restoration, It is characterized in that The invention comprises a plurality of positioning bodies, wherein each positioning body comprises a scanning rod body and an auxiliary rod arranged on the side of the scanning rod body, the auxiliary rod is selected to have an adaptive length according to the distance between two adjacent implant composite abutments, the scanning rod body is configured to be mounted on the composite abutment of each implant, and: The scanning rod body of each positioning body comprises an umbrella-shaped scanning part and a connecting part connected to the umbrella-shaped scanning part, the top of the umbrella-shaped scanning part further comprises a first top surface, a first cutting surface and a second cutting surface with geometric features arranged along two sides of the first top surface, the first cutting surface and the second cutting surface are respectively extended to the first top surface, and the first cutting surface / the second cutting surface and the first top surface have a clear intersection line, the first top surface, the first cutting surface / the second cutting surface and the intersection line constitute a multi-anisotropic shape of the top, so that the scanning rod body can be identified and / or located from the top direction of the body when being scanned intraorally; An auxiliary rod disposed on the side of the scanning body is configured to capture the features of the soft tissue transition zone of the implant according to the position adjustment of the implant in the oral cavity.

12. An umbrella-type scanning and positioning device for implant restoration of edentulous jaws as claimed in claim 11, It is characterized in that A radial hole radially passes through one side of the umbrella-shaped scanning part, and the auxiliary rod is fixed to the side of the scanning rod body through the hole. An axial hole is axially arranged in the middle of the first top surface of the umbrella-shaped scanning part, and a positioning pin is arranged in the axial hole. The positioning pin is screwed into the length of the scanning body to realize the engagement position of the positioning seed value body.

13. The umbrella-type scanning and positioning device for implant restoration of edentulous jaws according to claim 11, It is characterized in that The length of the scanning rod body is 8~12mm, and the diameter of the scanning rod is smaller than the diameter of the scanning head body. The cutting surface of the umbrella-shaped scanning part is set to be square or circular, wherein the diameter of the circular umbrella-shaped scanning part is 8mm, and the minimum distance between the two cutting surfaces is 6mm.

14. An umbrella-type scanning and positioning device, It is characterized in that At least one positioning body is included, and the positioning body includes: A scanning rod body, comprising an umbrella-shaped scanning portion and a connecting portion connected to the umbrella-shaped scanning portion, wherein the top of the umbrella-shaped scanning portion further comprises a first top surface, a first cutting surface with geometric features arranged along the first top surface, the first cutting surface extends to the first top surface, and the first cutting surface and the first top surface have a clear intersection line, the first top surface, the first cutting surface and the intersection line constitute a multi-tropic anisotropic morphology of the top, so that the scanning rod body can be identified and / or located from the top direction of the body when being scanned intraorally.

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