Auxiliary device for intraoral scanning of edentulous jaw

Abstract

The utility model is suitable for the technical field of edentulous jaw implantation repair, and provides an auxiliary device for scanning in an edentulous jaw mouth, which comprises a scanning positioning rod, a screw and a scanning auxiliary piece, the screw is arranged in the scanning positioning rod in a penetrating mode, and the scanning positioning rod is fixedly connected to the jaw implant composite abutment through the screw. Two grooves are formed in the circumferential side wall of the scanning positioning rod and surround the scanning positioning rod in the circumferential direction, the scanning positioning rod is provided with a convex part, the two grooves are spaced through the convex part, and one end of the scanning auxiliary part is provided with an elastic clamping part. And the elastic clamping part can be detachably assembled in the groove in a manner of rotating around the axis of the scanning positioning rod. The scanning auxiliary part can be in contact with the adjacent scanning positioning rod after transversely rotating around the axis direction of the scanning positioning rod, so that the two adjacent scanning positioning rods can be in contact connection through the scanning auxiliary part, the clinical operability is good, and the time of doctors and patients is saved.

Description

Technical Field

[0001] The utility model belongs to the technical field of edentulous jaw implant restoration, and in particular relates to an auxiliary device for intraoral scanning of edentulous jaw. Background Art

[0002] Since the advent of CAD / CAM technology in the 1980s, digital technology has developed rapidly in the field of dentistry. Now, with the widespread application of digital technology in the field of oral implant restoration, impression technology has gradually transitioned from material impressions to digital impressions. At present, digital impressions made using intraoral scanners (IOS) and intraoral scanning bodies (ISB) have realized a fully digital workflow for the production of implant-supported restorations.

[0003] Digital impressions can achieve similar or more accurate accuracy as traditional impressions within a small range to one quadrant, but it is still a huge challenge to make reliable edentulous digital impressions through digital impression technology. During the scanning process, IOS can only obtain partial data of the scanned object in each frame. In order to obtain the overall model of the scanned object, the acquired data must be processed by image stitching during subsequent surface reconstruction. However, errors will inevitably occur during the image stitching process. The error caused by image stitching is directly related to the scanning range and the distance between implants. Especially when the alveolar ridges between implants in edentulous jaws lack reference points with anatomical features that are conducive to IOS obtaining point cloud data, the scanning accuracy is affected, making it more difficult to obtain accurate edentulous digital impressions.

[0004] The specific challenge in scanning edentulous jaws is the limited number of quality reference points between ISBs. Therefore, one of the main ways to improve the accuracy of digital impressions is to increase the number of reference points by changing the surface and morphology of the alveolar ridge. The main principle of increasing reference points is to make auxiliary devices. At present, different auxiliary devices have been proposed to increase the number of reference points on the edentulous jaw surface. However, most of the existing auxiliary devices for increasing reference points use the scanning auxiliary part and the scanning rod as an integrated structure. The angle position of the scanning auxiliary part cannot be adjusted, and the clinical operability is poor. Customization based on the patient's condition further reduces efficiency and increases the time of both doctors and patients. Utility Model Content

[0005] The purpose of the embodiment of the utility model is to provide an auxiliary device for intraoral scanning of edentulous jaws, aiming to solve the problem of poor clinical operability of the auxiliary device in the prior art with the scanning auxiliary part and the scanning rod as an integrated structure.

[0006] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0007] An auxiliary device for intraoral scanning of an edentulous jaw, the auxiliary device being used for fixed connection to a composite base for jaw implantation, characterized in that the auxiliary device comprises a scanning positioning rod, a screw and a scanning auxiliary part; the screw is inserted into the scanning positioning rod, and the scanning positioning rod is fixedly connected to the composite base for jaw implantation through the screw;

[0008] At least one groove is provided on the peripheral side wall of the scanning positioning rod, and the groove is arranged around the circumferential direction of the scanning positioning rod. One end of the scanning auxiliary part has an elastic clamping portion, and the elastic clamping portion can be detachably assembled in the groove by rotating around the axis of the scanning positioning rod.

[0009] Furthermore, the elastic clamping portion has a C-shaped clamping groove, the groove has an annular wall portion, and the C-shaped clamping groove is sleeved on the annular wall portion.

[0010] Furthermore, the opening of the C-shaped slot forms an outwardly flared structure.

[0011] Furthermore, a through hole is provided on the scanning positioning rod, and the through hole passes through the scanning positioning rod along the axial direction of the scanning positioning rod. A resisting portion is protruded in the through hole, and the screw is passed through the through hole, and the head end of the screw abuts against the resisting portion.

[0012] Furthermore, one end of the through hole forms a receiving cavity for receiving the mandibular implant composite abutment, and the tail end of the screw extends into the receiving cavity.

[0013] Furthermore, the scanning positioning rod has a first cylinder, a second cylinder and a convex portion, the convex portion is located between the first cylinder and the second cylinder, there are two grooves, the two grooves are the first groove and the second groove, the first groove is located between the first cylinder and the convex portion, and the second groove is located between the second cylinder and the convex portion.

[0014] Furthermore, the outer diameter of the first cylinder is greater than the outer diameter of the second cylinder.

[0015] Furthermore, one end of the scanning auxiliary component away from the elastic clamping portion is a free end portion, and a thickness of the free end portion in the axial direction of the scanning positioning rod is smaller than a width of the groove in the axial direction of the scanning positioning rod.

[0016] Furthermore, a plurality of mutually spaced convex strips are provided on the upper surface of the scanning auxiliary component, and the convex strips are located between the elastic clamping portion and the free end portion.

[0017] Furthermore, a protrusion is provided on the lower surface of the scanning auxiliary component, and the protrusion is located between the elastic clamping portion and the free end portion.

[0018] Compared with the prior art, the embodiments of the present invention have the following beneficial effects:

[0019] The utility model can conveniently and detachably assemble the scanning auxiliary component on the groove of the scanning positioning rod through the elastic clamping part at one end of the scanning auxiliary component, so that the scanning auxiliary component can contact the adjacent scanning positioning rod after being horizontally rotated around the axial direction of the scanning positioning rod, so that the two adjacent scanning positioning rods can be contact-connected through the scanning auxiliary component, and the clinical operability is good, and a stable and reliable edentulous jaw surface reference point is provided for intraoral scanning of the edentulous jaw, so that when the scanning positioning rod is subjected to three-dimensional scanning, the auxiliary scanning component can be conveniently operated to simulate the tooth shape for extension and connection, so that all scanning positioning rods can be integrated into one coordinate system, and only one reference base point needs to be set, and the three-dimensional scanner can complete the scanning work at one time starting from the reference base point, thereby improving the scanning efficiency and accuracy and saving the time of both doctors and patients. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the structure of an auxiliary device for intraoral scanning of edentulous jaws provided by an embodiment of the utility model;

[0021] Figure 2 yes Figure 1 A schematic cross-sectional structure diagram of ;

[0022] Figure 3 yes Figure 2 A schematic diagram of the enlarged structure of region A;

[0023] Figure 4 yes Figure 1 Schematic diagram of the scanning positioning rod structure;

[0024] Figure 5 yes Figure 1 A schematic diagram of the scanning auxiliary structure in FIG.

[0025] Figure 6 It is a schematic diagram of the structure of an edentulous jaw implant restoration model provided in an embodiment of the utility model.

[0026] The reference numerals in the figures are:

[0027] 1. Scanning positioning rod; 10. Groove; 101. Annular wall; 11. First groove; 12. Second groove; 13. Protrusion; 14. Through hole; 141. Accommodating cavity; 15. Stopper; 16. First cylinder; 17. Second cylinder; 2. Screw; 3. Scanning auxiliary part; 31. Elastic clamping part; 311. C-shaped clamping groove; 312. Expanding structure; 32. Free end; 33. Raised strip; 34. Bump; 4. Connector; 5. Composite base for mandibular implant. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0029] In the description of the present utility model, it should be noted that if the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the accompanying drawings, or is the orientation or position relationship in which the utility model product is usually placed when used. It is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model.

[0030] See also Figures 1 to 6 As shown, the embodiment of the utility model provides an auxiliary device for intraoral scanning of edentulous jaws, and the auxiliary device is used to be fixedly connected to the composite base 5 for jaw implantation. Specifically, the auxiliary device includes a scanning positioning rod 1, a screw 2, and a scanning auxiliary part 3. The screw 2 is inserted into the scanning positioning rod 1, and the scanning positioning rod 1 is fixedly connected to the composite base 5 for jaw implantation through the screw 2; two grooves 10 are provided on the peripheral side wall of the scanning positioning rod 1, and the grooves 10 are arranged around the circumferential direction of the scanning positioning rod 1. The scanning positioning rod 1 has a convex portion 13, and the two grooves 10 are spaced apart from each other by the convex portion 13. The two grooves 10 are spaced apart from each other along the axial direction of the scanning positioning rod 1, and one end of the scanning auxiliary part 3 has an elastic clamping part 31, and the elastic clamping part 31 can be rotatably assembled in the groove 10 around the axis of the scanning positioning rod 1, and the elastic clamping part 31 is detachably sleeved in the groove 10 by its own elastic force, and the scanning auxiliary part 3 can be removed from the groove 10 by overcoming the elastic force of the elastic clamping part 31.

[0031] In the above embodiment, the groove 10 is arranged around the circumferential direction of the scanning positioning rod 1 to form an annular groove 10, so that after the clamping portion is sleeved in the groove 10, the scanning auxiliary component 3 can rotate 360 ​​degrees around the axis of the scanning positioning rod 1, and its rotation adjustment range is large. In this embodiment, the scanning auxiliary component 3 is easy to rotate to a suitable position to overlap the adjacent scanning positioning rods 1, so that one scanning auxiliary component 3 overlaps between two adjacent scanning positioning rods 1. The scanning auxiliary component 3 can have a variety of different length specifications. When the distance between two adjacent scanning positioning rods 1 is large, the scanning auxiliary component 3 can be replaced with a length-adapted scanning auxiliary component 3 so that the length of the scanning auxiliary component 3 is sufficient so that its two ends can contact the two adjacent scanning positioning rods 1. It can be understood that two scanning auxiliary components 3 can also be respectively assembled in two grooves 10 of the same scanning positioning rod 1, so that the two scanning auxiliary components 3 can be relatively independently rotated around the axis of the scanning positioning rod 1 to the two sides of the scanning positioning rod 1, so that they can contact the adjacent scanning positioning rods 1.

[0032] In other embodiments, when the distance between two adjacent scanning positioning rods 1 is large, two scanning auxiliary parts 3 can be used for up-and-down overlap. Specifically, the two grooves 10 on the scanning positioning rod 1 are defined as the first groove 11 and the second groove 12, respectively. The first groove 11 is located above the second groove 12. The clamping part on one of the scanning auxiliary parts 3 is assembled and connected with the first groove 11 on one of the scanning positioning rods 1, and the clamping part of the other scanning auxiliary part 3 is assembled and connected with the second groove 12 on the other scanning positioning rod 1. Then, the two scanning auxiliary parts 3 are rotated respectively so that the other ends of the two scanning auxiliary parts 3 away from the clamping part are in up-and-down overlap contact. The operation is flexible and the operability is good. Figure 6 As shown, scanning auxiliary parts 3 of different lengths can be quickly replaced according to the distance between implants. After the scanning auxiliary parts 3 are disassembled according to actual needs, the connecting parts 4 can be directly installed clinically for fixed molding through cold welding, and a trial bracket repair can be directly performed.

[0033] In the above embodiment, the protrusion 13 is arranged around the circumferential direction of the scanning positioning rod 1 to form an annular protrusion 13 to limit the clamping portion in the axial direction of the scanning positioning rod 1, thereby preventing the scanning auxiliary component 3 from being displaced in the axial direction of the scanning positioning rod 1, which is beneficial to the stable reliability of the connection of the scanning auxiliary component 3 to the scanning positioning rod 1.

[0034] In the above embodiment, the elastic clamping part 31 has a C-shaped clamping groove 311, and the groove 10 has an annular wall part 101. The C-shaped clamping groove 311 is sleeved on the annular wall part 101, so that the elastic clamping part is easy to rotate the annular wall part 101. The opening of the C-shaped clamping groove 311 forms a flared structure 312 outward, so that after the flared structure 312 is aligned with the annular wall part 101, the annular wall part 101 is easily inserted into the C-shaped clamping groove 311 through elastic deformation, which is not only convenient to assemble, but also stable to assemble.

[0035] In the above embodiment, a through hole 14 is provided on the scanning positioning rod 1, and the through hole 14 passes through the scanning positioning rod 1 along the axial direction of the scanning positioning rod 1. A stopper 15 is convexly provided in the through hole 14. The screw 2 is passed through the through hole 14, and the head end of the screw 2 abuts against the stopper 15. One end of the through hole 14 forms a receiving cavity 141 for accommodating the mandibular implant composite base 5. The tail end of the screw 2 extends into the receiving cavity 141, so that the upper end of the mandibular implant composite base 5 can be inserted into the receiving cavity 141 and then locked on the mandibular implant composite base 5 by using the screw 2. The scanning positioning rod 1 can be quickly assembled to the maxillary implant composite base 5, and the assembly and positioning of the scanning positioning rod 1 can be reliable.

[0036] In the above embodiment, the scanning positioning rod 1 has a first cylinder 16 and a second cylinder 17, the first cylinder 16 is the upper end of the scanning positioning rod 1, the surfaces of the first cylinder 16, the second cylinder 17 and the protrusion 13 are sandblasted, the second cylinder 17 is the lower end of the scanning positioning rod 1, and the accommodating cavity 141 is provided on the second cylinder 17. The convex portion 13 arranged around the circumferential direction of the scanning positioning rod 1 is located between the first cylinder 16 and the second cylinder 17. The two grooves 10 on the scanning positioning rod 1 are respectively the first groove 11 and the second groove 12. The first groove 11 is located between the first cylinder 16 and the convex portion 13, and the second groove 12 is located between the second cylinder 17 and the convex portion 13. After the scanning auxiliary part 3 is assembled in the first groove 11 or / and the second groove 12 through the clamping part thereon, the scanning auxiliary part 3 can be effectively restricted from moving along the axial direction of the scanning positioning rod 1, so that the scanning auxiliary part 3 installed on the scanning positioning rod 1 can only rotate but cannot move along the axial direction of the scanning positioning rod 1. The outer diameter of the first cylinder 16 is greater than the outer diameter of the second cylinder 17, and the outer diameter of the second cylinder 17 is equal to the outer diameter of the convex portion 13. The outer diameter of the first cylinder 16 is designed to be larger, which can be more obviously recognized and located by the intraoral scanner, making it convenient for the dental equipment to accurately capture its position information and improve the accuracy of scanning. The outer diameter of the second cylinder 17 is designed to be small, so that when the scanning positioning rod 1 is installed, the second cylinder 17 reduces the interference with the surrounding dental and maxillary tissues.

[0037] In the above embodiment, the end of the scanning auxiliary component 3 away from the elastic clamping portion 31 is a free end portion 32, and the thickness of the free end portion 32 in the axial direction of the scanning positioning rod 1 is smaller than the width of the groove 10 in the axial direction of the scanning positioning rod 1, so that the scanning auxiliary component 3 can extend into the groove 10 and overlap on the inner wall of the groove 10, thereby enhancing the stability of the overlap between the free end portion 32 and the scanning positioning rod 1.

[0038] In the above embodiment, the upper surface of the scanning auxiliary component 3 is provided with a plurality of mutually spaced convex strips 33, which are located between the elastic clamping portion 31 and the free end portion 32. Medical personnel can clamp the middle part of the scanning auxiliary component 3 with tools such as tweezers, so that the tweezers are in contact with the convex strips 33, thereby increasing the friction force, and facilitating the operation of the tweezers to stably clamp the scanning auxiliary component 3 to overcome the elastic clamping force of the elastic clamping portion 31 on the scanning positioning rod 1, so that the scanning auxiliary component 3 can rotate around the axis of the scanning positioning rod 1, and at the same time, it is convenient for the tweezers to apply force to remove the scanning auxiliary component 3 from the scanning positioning rod 1. The lower surface of the scanning auxiliary component 3 is provided with a convex block 34, which is located between the elastic clamping portion 31 and the free end portion 32, so as to increase the number of quality reference points between adjacent scanning positioning rods 1.

[0039] In summary, the utility model can conveniently and detachably assemble the scanning auxiliary component 3 on the groove 10 of the scanning positioning rod 1 through the elastic clamping part 31 at one end of the scanning auxiliary component 3, so that the scanning auxiliary component 3 can be laterally rotated around the axial direction of the scanning positioning rod 1 and then contact the adjacent scanning positioning rod 1, so that the two adjacent scanning positioning rods 1 can be contact-connected through the scanning auxiliary component 3, and it has good clinical operability, providing a stable and reliable edentulous jaw surface reference point for intraoral scanning of edentulous jaws, so that when performing three-dimensional scanning on the scanning positioning rod 1, it is convenient to operate the auxiliary scanning component to simulate the tooth shape for extension and connection, so that all scanning positioning rods 1 can be integrated into a coordinate system, and only one reference base point needs to be set. The three-dimensional scanner can start from the reference base point and complete the scanning work at one time, thereby improving the scanning efficiency and accuracy and saving time for both doctors and patients.

[0040] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An auxiliary device for intraoral scanning of edentulous jaws, the auxiliary device being used for fixed connection to a composite base for jaw implantation, characterized in that: The auxiliary device comprises a scanning positioning rod, a screw and a scanning auxiliary part; the screw is inserted into the scanning positioning rod, and the scanning positioning rod is fixedly connected to the mandibular implant composite base through the screw; At least one groove is provided on the peripheral side wall of the scanning positioning rod, and the groove is arranged around the circumferential direction of the scanning positioning rod. One end of the scanning auxiliary part has an elastic clamping portion, and the elastic clamping portion can be detachably assembled in the groove by rotating around the axis of the scanning positioning rod.

2. The auxiliary device for intraoral scanning of edentulous jaws according to claim 1, characterized in that: The elastic clamping portion is provided with a C-shaped clamping groove, the groove is provided with an annular wall portion, and the C-shaped clamping groove is sleeved on the annular wall portion.

3. The auxiliary device for intraoral scanning of edentulous jaws according to claim 2, characterized in that: The opening of the C-shaped slot forms an outwardly flared structure.

4. The auxiliary device for intraoral scanning of edentulous jaws according to claim 1, characterized in that: The scanning positioning rod is provided with a through hole, which penetrates the scanning positioning rod along the axial direction of the scanning positioning rod. A resisting portion is protruded in the through hole, the screw is passed through the through hole, and the head end of the screw abuts against the resisting portion.

5. The auxiliary device for intraoral scanning of edentulous jaws according to claim 4, characterized in that: One end of the through hole forms a receiving cavity for receiving the mandibular implant composite base, and the tail end of the screw extends into the receiving cavity.

6. The auxiliary device for intraoral scanning of edentulous jaws according to claim 1, characterized in that: The scanning positioning rod has a first cylinder, a second cylinder and a convex portion, the convex portion is located between the first cylinder and the second cylinder, there are two grooves, the two grooves are the first groove and the second groove, the first groove is located between the first cylinder and the convex portion, and the second groove is located between the second cylinder and the convex portion.

7. The auxiliary device for intraoral scanning of edentulous jaws according to claim 6, characterized in that: The outer diameter of the first cylinder is greater than the outer diameter of the second cylinder.

8. The auxiliary device for intraoral scanning of edentulous jaws according to claim 1, characterized in that: One end of the scanning auxiliary part away from the elastic clamping part is a free end portion, and the thickness of the free end portion in the axial direction of the scanning positioning rod is smaller than the width of the groove in the axial direction of the scanning positioning rod.

9. The auxiliary device for intraoral scanning of edentulous jaws according to claim 8, characterized in that: The upper surface of the scanning auxiliary component is provided with a plurality of convex strips spaced apart from each other, and the convex strips are located between the elastic clamping portion and the free end portion.

10. The auxiliary device for intraoral scanning of edentulous jaws according to claim 8, characterized in that: A convex block is arranged on the lower surface of the scanning auxiliary component, and the convex block is located between the elastic clamping portion and the free end portion.

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