WO2022178973A1

WO2022178973A1 - Dental scanning rod

Info

Publication number: WO2022178973A1
Application number: PCT/CN2021/090333
Authority: WO
Inventors: 张潇; 李买生; 陈贤帅
Original assignee: 广州市健齿生物科技有限公司
Priority date: 2021-02-24
Filing date: 2021-04-27
Publication date: 2022-09-01
Also published as: CN112932704A

Abstract

A dental scanning rod, comprising: a working component (100), the bottom of the working component (100) being provided with a mounting hole (110); the inner wall of the mounting hole (110) being provided with at least one plane; the inner wall of the mounting hole (110) being provided with first clamping structures (111); the top of the working component (100) being provided with a connecting hole (120); the connecting hole (120) extending downwards and being communicated with the mounting hole (110); a connecting component (200), the top of the connecting component (200) being provide with a mounting base (210); the shape of the mounting base (210) matching the shape of the mounting hole (110); the mounting base (210) being inserted into the mounting hole (110) from bottom to top; the side wall of the mounting base (210) being provided with second clamping structures (220); the second clamping structures (220) being fitted to the first clamping structures (111) in a matched mode; an assembling hole (230) passing through the mounting base (210); and a connecting screw (300) sequentially passing through the connecting hole (120), the mounting hole (110), and the assembling hole (230) from top to bottom, the bottom end of the connecting screw (300) extending out of the connecting component (200). According to the dental scanning rod, after the connecting component (200) and the working component (100) are locked to an implant body by the connecting screw (300), the connecting component (200) is accurately assembled to the working component (100), thereby protecting the working component (100) from being damaged. The dental scanning rod can be applied to dental implantation.

Description

dental scan bar

technical field

The invention relates to the field of dental implants, in particular to a dental scanning rod.

Background technique

In the process of personalized dental implant restoration, the implant is first implanted in the patient's mouth, and then the dental scan rod is installed on the implant, and the patient's oral structure and dental scan rod are scanned with an intraoral scanner, so as to obtain the patient's oral cavity. Information such as the position and orientation of the implants in the implant can be used for personalized implant restoration.

The existing dental scanning rod is composed of a connecting part, a working part, and a connecting screw, the connecting part fits with the implant, and the connecting screw locks the connecting part and the working part to the implant. Since the connecting parts are often in contact with the implants, the connecting parts are made of materials such as titanium alloys to improve the wear resistance of the connecting parts; and the working parts are used for scanning by the intraoral scanner, so the working parts are made of plastic and other materials. In order to improve the accuracy of scanning and reading of working parts. However, the hardness of the connecting part is greater than the hardness of the working part. If the connecting part and the working part are misaligned, when the connecting part and the working part are locked to the implant by the connecting screw, the connecting part and the connecting screw will be squeezed. working parts, thereby damaging the working parts.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a dental scanning rod, so as to solve one or more technical problems existing in the prior art, and at least provide a beneficial option or create conditions.

The technical solutions adopted to solve the above technical problems:

A dental scan bar, comprising:

The bottom of the working part is provided with a mounting hole, the inner wall of the mounting hole has at least one plane, the inner wall of the mounting hole is provided with a first clamping structure, the top of the working part is provided with a connecting hole, the connection the hole extends downward and communicates with the mounting hole;

The top of the connecting part is provided with a mounting seat, the shape of the mounting seat matches the shape of the mounting hole, the mounting seat is inserted into the mounting hole from bottom to top, and the side wall of the mounting seat is provided with There is a second clamping structure, the position of the second clamping structure is corresponding to the position of the first clamping structure, the second clamping structure is engaged with the first clamping structure, and the second clamping structure is engaged with the first clamping structure. The connecting part is provided with an assembly hole penetrating through the up-down direction, and the assembly hole penetrates the mounting seat;

The connecting screw passes through the connecting hole, the mounting hole and the assembling hole in sequence from top to bottom, the upper part of the connecting screw is in contact with the working part, and the bottom end of the connecting screw protrudes from the below the connecting member.

The beneficial effect of the present invention is that the mounting seat of the connecting part is matched with the mounting hole of the working part, and since the inner wall of the mounting hole has at least one plane, after the mounting seat is matched with the mounting hole, the relative relationship between the connecting part and the working part is prevented. Rotation, and prevent the relative displacement in the horizontal direction between the connecting part and the working part, and the second clamping structure on the side wall of the mounting seat cooperates with the first clamping structure on the inner wall of the mounting hole to prevent the connecting part from working. The relative displacement in the up and down direction occurs between the parts, so that the connecting parts and the working parts can be assembled together accurately. The connecting screws pass through the connecting holes, installation holes and assembly holes in sequence from top to bottom. Below the component, after the connecting screw locks the connecting component and the working component to the implant, the connecting component and the working component are assembled accurately, so as to avoid damage to the working component, and since the working component and the connecting component will not undergo relative displacement after assembly, The accuracy of the scanning and reading of the working parts is improved.

As a further improvement of the above technical solution, the cross-sectional shape of the installation hole is a rotationally symmetrical figure, there are multiple first clamping structures, and all the first clamping structures are uniformly distributed in sequence along the circumferential direction of the installation. .

The cross-sectional shape of the mounting hole is a rotationally symmetrical figure, and the shape of the mounting seat of the connecting part matches the shape of the mounting hole, that is, after the working part is rotated at a certain angle, the mounting hole can cooperate with the mounting seat, and the plurality of first clamping structures are along the The circumferential direction of the mounting holes is evenly spaced, and the second clamping structure on the mounting seat cooperates with the first clamping structure for clamping, so that the assembly of the working part and the connecting part is more convenient.

As a further improvement of the above technical solution, there are multiple second engaging structures, and all the second engaging structures are evenly spaced in sequence along the circumferential direction of the mounting seat, and the positions of the second engaging structures are the same as The positions of the first clamping structures are in one-to-one correspondence.

The mounting seat is provided with a plurality of second clamping structures. The positions of the second clamping structures and the first clamping structures correspond one-to-one. The snap between components is more stable.

As a further improvement of the above technical solution, the first clamping structure is a groove, and the second clamping structure is a buckle.

The first clamping structure is a groove, so that the structure of the installation hole is simple and easy to manufacture; the second clamping structure is a buckle, and the structure of the mounting seat is simple and easy to manufacture.

As a further improvement of the above technical solution, the side wall of the mounting seat is provided with a long slotted hole, the long slotted hole communicates with the assembly hole, the second clamping structure is located in the long slotted hole, the The second clamping structure includes an elastic sheet and a protrusion. One end of the elastic sheet is connected to the inner wall of the long slot hole, and the other end of the elastic sheet is movably arranged in the long slot hole. On the outer wall of the elastic sheet, the protruding block protrudes toward the outside of the mounting seat, and the protruding block is inserted into the first clamping structure.

The second clamping structure includes an elastic piece and a protrusion. One end of the elastic piece is connected to the long slot hole of the mounting seat, the other end of the elastic piece is located in the long slot hole, and the protrusion is located on the outer wall of the elastic piece, so that the second clamping structure is an elastic clip. In the form of a buckle, it is convenient for the second clamping structure to be disengaged from the first clamping structure, which makes the assembly and disassembly of the mounting seat and the mounting hole more convenient, and the long slot hole communicates with the mounting hole. When the connecting screw passes through the mounting hole, The outer wall of the connecting screw is close to the inner wall of the shrapnel, and the link screw prevents the shrapnel from swinging into the assembly hole, preventing the protrusion from coming out of the first clamping structure, and making the clamping between the working part and the connecting part more stable.

As a further improvement of the above technical solution, the connecting hole is a stepped hole, the connecting hole is divided into an upper section and a lower section from top to bottom, the diameter of the upper section is larger than the diameter of the lower section, and the connecting screw is a half-thread screw , the screw head of the connecting screw is in contact with the top port of the lower section, the shape of the polished rod of the connecting screw matches the shape of the lower section, and the polished rod of the connecting screw extends downward into the mounting hole and the in the mounting hole.

The screw head of the connecting screw is in contact with the top port of the lower section of the connecting hole, so that the connecting screw is in contact with the working part, and the shape of the polished rod of the connecting screw matches the shape of the lower section of the connecting hole, so that the lower section and the polished rod are matched to realize the connecting hole to the connecting screw. When the connecting screw is screwed, it can prevent the shaking between the connecting screw and the working part, so that the assembly between the connecting screw and the working part is more accurate.

As a further improvement of the above technical solution, an inner thread is provided on the inner wall of the lower section, and the inner thread is matched with the outer thread of the connecting screw.

The inner thread of the lower section of the connection hole is matched with the outer thread of the connection screw. When the screw rod of the connection screw passes through the connection hole, it needs to be rotated in the inner thread and passed through, so as to prevent the connection screw from coming out of the connection hole of the working part, so that the connection screw and the work The parts are tied together to facilitate the physician's access to the connecting screws.

As a further improvement of the above technical solution, the top of the working part is provided with a scanning structure, the outer side wall of the scanning structure has a first positioning surface and a second positioning surface, the first positioning surface and the second positioning surface They are respectively located on two opposite sides of the scanning structure, the first positioning surface is an arc surface, the second positioning surface is a plane, the cross-sectional shape of the scanning structure is an axisymmetric figure, and the symmetry axis of the scanning structure passes through. passing through the first positioning surface and the second positioning surface.

The first positioning surface and the second positioning surface of the scanning structure are respectively located on two opposite sides of the scanning structure, the first positioning surface is an arc surface, the second positioning surface is a plane, and the symmetry axis of the scanning structure passes through the first positioning surface and the For the second positioning surface, when the intraoral scanner is used for scanning, the first positioning surface and the second positioning surface can be quickly determined and positioned, so as to determine the front-to-back direction, which helps to improve the scanning efficiency.

As a further improvement of the above technical solution, the connecting member is provided with an abutting portion, the abutting portion is located at the bottom of the mounting seat, the abutting portion extends toward the outer circumference of the mounting seat, and the abutting portion The top of the working part is in contact with the bottom of the working part.

After the working part is assembled with the connecting part, the abutting part of the connecting part abuts against the bottom of the working part. Since the hardness of the connecting part is greater than the hardness of the working part, when the bottom end of the connecting screw is screwed into the implant, the abutting part is opposite to the working part. Limit the position to prevent the screw from being screwed into the implant too deeply, causing the mounting seat to squeeze and damage the mounting hole.

Description of drawings

The present invention will be further described below in conjunction with the accompanying drawings and embodiments;

1 is a schematic front view of a dental scanning rod provided by the present invention, an embodiment thereof;

Fig. 2 is the sectional schematic diagram of A-A in Fig. 1;

Fig. 3 is the dental scanning rod provided by the present invention, a schematic front view of the connecting member in an embodiment thereof;

Fig. 4 is the sectional schematic diagram of B-B in Fig. 3;

5 is a schematic top view of a working part in an embodiment of the dental scanning rod provided by the present invention;

6 is a schematic front view of a working part in an embodiment of the dental scanning rod provided by the present invention;

FIG. 7 is a schematic cross-sectional view of C-C in FIG. 6 .

100, working part, 110, mounting hole, 111, first clamping structure, 120, connecting hole, 121, upper section, 122, lower section, 123, internal thread, 130, scanning structure, 131, first positioning surface, 132, Second positioning surface, 200, connecting part, 210, mounting seat, 211, long slot, 220, second snap-fit structure, 221, elastic piece, 222, bump, 230, mounting hole, 240, abutting part, 300 , connecting screws.

Detailed ways

This part will describe the specific embodiments of the present invention in detail, and the preferred embodiments of the present invention are shown in the accompanying drawings. Each technical feature and overall technical solution of the invention should not be construed as limiting the protection scope of the invention.

In the description of the present invention, it should be understood that the azimuth description, such as the azimuth or position relationship indicated by up, down, front, rear, left, right, etc., is based on the azimuth or position relationship shown in the drawings, only In order to facilitate the description of the present invention and simplify the description, it is not indicated or implied that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention.

In the description of the present invention, if there is a word description such as "several", its meaning is one or more, the meaning of multiple is two or more, greater than, less than, exceeding, etc. are understood as not including this number, above, below , within, etc. are understood to include this number.

In the description of the present invention, unless otherwise clearly defined, words such as setting, installation, connection should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in the present invention in combination with the specific content of the technical solution.

1 to 7, the dental scan bar of the present invention is made as follows:

The dental scanning rod includes a working part 100 , a connecting part 200 , and a connecting screw 300 . The bottom of the working part 100 is provided with a mounting hole 110, the mounting hole 110 is a hexagonal hole, and the cross-sectional shape of the mounting hole 110 is a regular hexagon, that is, the cross-sectional shape of the mounting hole 110 is a rotationally symmetrical figure. The top of the working part 100 is provided with a connecting hole 120 , and the connecting hole 120 extends downward and communicates with the mounting hole 110 . The connecting hole 120 is a stepped hole. The connecting hole 120 is divided into an upper section 121 and a lower section 122 from top to bottom. The diameter of the upper section 121 is larger than that of the lower section 122 . The top of the working part 100 is provided with a scanning structure 130, the scanning structure 130 is a column structure, the outer side wall of the scanning structure 130 is provided with a first positioning surface 131 and a second positioning surface 132, the first positioning surface 131 and the second positioning surface 132 They are respectively located on two opposite sides of the scanning structure 130 , the first positioning surface 131 is an arc surface, the second positioning surface 132 is a flat surface, and a plane transition is used between the first positioning surface 131 and the second positioning surface 132 , and the cross-sectional shape of the scanning structure 130 is In an axis-symmetrical figure, the symmetry axis of the scanning structure 130 passes through the first positioning surface 131 and the second positioning surface 132 , the shape of the scanning structure 130 is a hexagonal prism, the scanning structure 130 has six sides, the first positioning surface 131 and the second positioning surface 131 The two positioning surfaces 132 are the front and rear sides opposite to the scanning structure 130 . When the scanning structure 130 is scanned by a scanner, the first positioning surface 131 and the second positioning surface 132 can be set as the front and rear sides of the scanning structure 130 respectively. side.

The top of the connecting member 200 is provided with a mounting seat 210, the shape of the mounting seat 210 matches the shape of the mounting hole 110, the shape of the mounting seat 210 is a regular hexagonal prism, and the mounting seat 210 is inserted into the mounting hole 110 from bottom to top. The inner wall of the installation hole 110 is provided with a first clamping structure 111 , the first clamping structure 111 is a groove, there are six first clamping structures 111 , and the six first clamping structures 111 are uniformly distributed in the installation hole in sequence. On the inner wall of the mounting hole 110 , since the mounting hole 110 is a regular hexagonal prism hole, each inner surface of the mounting hole 110 is provided with a first clamping structure 111 . The side wall of the mounting seat 210 is provided with a second engaging structure 220 , the second engaging structure 220 is a buckle, the mounting seat 210 is located in the mounting hole 110 , and the position of the second engaging structure 220 is the same as that of the first engaging structure 111 . Corresponding to the position of the second clamping structure 220 and the first clamping structure 111 are engaged and clamped. There are three second engaging structures 220 . The three second engaging structures 220 are evenly spaced along the circumferential direction of the mounting seat 210 , and the shape of the mounting seat 210 is a regular hexagonal prism. On three sides of the seat 210 , the three second engaging structures 220 are engaged with the three first engaging structures 111 one by one. The connecting member 200 is provided with an abutting portion 240 . The abutting portion 240 is located at the bottom of the mounting seat 210 . The abutting portion 240 extends to the outer circumference of the mounting seat 210 to form a boss. .

The connecting member 200 is provided with a mounting hole 230 penetrating in the up-down direction, and the mounting hole 230 penetrates the mounting seat 210 . The connecting screw 300 passes through the connecting hole 120, the mounting hole 110 and the assembling hole 230 in sequence from top to bottom. The connecting screw 300 is a half-tooth screw, and the screw head of the connecting screw 300 is in contact with the top port of the lower section 122 of the connecting hole 120. The polished rod shape of 300 matches the shape of the upper section 121 of the connecting hole 120 . When the dental scanning rod is installed on the implant in the patient's mouth, the screw at the bottom of the connecting screw 300 is connected with the threaded hole of the implant, the bottom of the connecting part 200 is in contact with the top of the implant, and the screw head of the connecting screw 300 is connected with the connecting hole. The top ports of the lower section 122 of 120 abut against each other, so that the working part 100 and the connecting part 200 are tightly connected together.

The screw rod of the connecting screw 300 is matched with the internal thread 123 of the lower section 122 of the connecting hole 120. When the connecting screw 300 passes through the connecting hole 120 from top to bottom, the screw rod of the connecting screw 300 needs to rotate clockwise and pass through the internal thread 123. Take out the connecting screw 300 upward from the connecting hole 120, then the screw of the connecting screw 300 needs to be rotated counterclockwise and pass upward through the inner thread 123, that is, the inner thread 123 is used to limit the connecting screw 300, so as to prevent the connecting screw 300 from passing through the connecting hole 120. middle detachment.

The side wall of the mounting seat 210 is provided with a long slotted hole 211 , the long slotted hole 211 extends in the up-down direction, the long slotted hole 211 is connected to the assembly hole 230 , the second clamping structure 220 is an elastic buckle, and the second clamping structure 220 is located in the in the slotted hole 211. The second clamping structure 220 includes an elastic piece 221 and a convex block 222 , the bottom end of the elastic piece 221 is connected to the bottom inner wall of the long slot hole 211 , the top of the elastic piece 221 extends upward to the top of the long slot hole 211 , and the convex block 222 is located at the bottom of the elastic piece 221 . At the top, the protruding block 222 protrudes toward the outside of the mounting seat 210 , and the protruding block 222 is inserted into the first engaging structure 111 so that the second engaging structure 220 is engaged with the first engaging structure 111 . The connecting screw 300 is inserted through the assembly hole 230 , and the side of the elastic sheet 221 facing the mounting hole 230 is the inner side, so the gap between the outer wall of the connecting screw 300 and the inner side of the elastic sheet 221 is small, and the outer wall of the connecting screw 300 prevents the elastic sheet 221 The top end of the cam is bent toward the inside of the mounting hole 230 , so that the protrusion 222 can be retained on the first engaging structure 111 .

In some embodiments, the second clamping structure 220 and the first clamping structure 111 can be engaged in various ways. For example, the first clamping structure 111 is a protrusion on the inner wall of the mounting hole 110 , and the second clamping structure 111 is a protrusion on the inner wall of the mounting hole 110 . The structure 220 is a groove on the outer side wall of the mounting seat 210, and the first snap-fit structure 111 protrudes toward the inside of the mounting hole 110. When the mounting seat 210 is inserted into the mounting hole 110 of the working part 100 from bottom to top, the first snap-fit structure 111 is inserted into the second clamping structure 220, so that the mounting seat 210 is clamped with the mounting hole 110; The outer side wall of the mounting seat 210 is provided with a slot, and the second engagement structure 220 is arranged in the slot. The second engagement structure 220 includes a compression spring and a slider. The slider can move along the slot and protrude from the mounting seat. Outside 210, the compression spring is elastically pressed between the slider and the inner wall of the slot, and the compression spring pushes the slider to move outward. When the mounting seat 210 is inserted into the mounting hole 110, the compression spring pushes the slider to move outward and insert it. in the first clamping structure 111 .

In some embodiments, the cross-sectional shape of the mounting hole 110 is not a rotationally symmetrical figure, and the shape of the mounting seat 210 matches the shape of the mounting hole 110 , so the position of the first clamping structure 111 must match the position of the second clamping structure 220 . The positions correspond to each other; when there are multiple first snap structures 111 and multiple second snap structures 220 , the second snap structures 220 must be arranged in a one-to-one correspondence with the first snap structures 111 .

The preferred embodiments of the present invention have been specifically described above, but the present invention is not limited to the described embodiments, and those skilled in the art can also make various equivalent modifications or substitutions without departing from the spirit of the present invention, These equivalent modifications or substitutions are all included within the scope defined by the claims of the present application.

Claims

A dental scanning rod, characterized in that: comprising:

The working part (100) is provided with an installation hole (110) at the bottom, the inner wall of the installation hole (110) has at least one plane, and the inner wall of the installation hole (110) is provided with a first clamping structure (111) , the top of the working part (100) is provided with a connecting hole (120), and the connecting hole (120) extends downward and communicates with the mounting hole (110);

A connecting component (200) is provided with a mounting seat (210) at the top, the shape of the mounting seat (210) matches the shape of the mounting hole (110), and the mounting seat (210) is inserted from bottom to top In the mounting hole (110), a second clamping structure (220) is provided on the side wall of the mounting seat (210), and the position of the second clamping structure (220) is connected with the first clamping structure The position of the structure (111) corresponds to the position of the second clamping structure (220) and the first clamping structure (111), and the connecting member (200) is provided with an assembly hole penetrating in the up-down direction. (230), the mounting hole (230) penetrates the mounting seat (210);

A connecting screw (300) passes through the connecting hole (120), the mounting hole (110), and the assembling hole (230) in sequence from top to bottom, and the upper part of the connecting screw (300) is connected to the The working part (100) abuts, and the bottom end of the connecting screw (300) protrudes below the connecting part (200).
The dental scanning rod according to claim 1, characterized in that: the cross-sectional shape of the installation hole (110) is a rotationally symmetrical figure, there are multiple first clamping structures (111), and all the first clamping structures (111) The connecting structures (111) are uniformly distributed in sequence along the circumferential direction of the mounting hole (110).
The dental scanning rod according to claim 2, characterized in that: there are multiple second clamping structures (220), and all the second clamping structures (220) are along the circumference of the mounting seat (210). The positions of the second clamping structures (220) are in a one-to-one correspondence with the positions of the first clamping structures (111).
The dental scanning rod according to claim 1, characterized in that: the first clamping structure (111) is a groove, and the second clamping structure (220) is a buckle.
The dental scanning rod according to claim 4, wherein a long slot hole (211) is provided on the side wall of the mounting seat (210), and the long slot hole (211) communicates with the assembly hole (230). ), the second clamping structure (220) is located in the long slot hole (211), the second clamping structure (220) includes a spring piece (221) and a convex block (222), the spring piece (221) ) is connected to the inner wall of the long slot hole (211), the other end of the elastic sheet (221) is movably arranged in the long slot hole (211), and the protrusion (222) is located in the On the outer wall of the elastic sheet (221), the protruding block (222) protrudes toward the outside of the mounting seat (210), and the protruding block (222) is inserted into the first clamping structure (111).
The dental scanning rod according to claim 1, wherein the connecting hole (120) is a stepped hole, and the connecting hole (120) is divided into an upper section (121) and a lower section (122) from top to bottom, so The diameter of the upper section (121) is larger than the diameter of the lower section (122), the connecting screw (300) is a half-thread screw, and the screw head of the connecting screw (300) is in contact with the top port of the lower section (122). , the shape of the polished rod of the connecting screw (300) matches the shape of the lower section (122), and the polished rod of the connecting screw (300) extends downward into the mounting hole (110) and the mounting hole (230) )middle.
The dental scanning rod according to claim 6, characterized in that: the inner wall of the lower section (122) is provided with an inner thread (123), the inner thread (123) and the outer thread of the connecting screw (300) match.
The dental scanning rod according to claim 1, characterized in that: a scanning structure (130) is provided on the top of the working part (100), and an outer side wall of the scanning structure (130) has a first positioning surface (131) and the second positioning surface (132), the first positioning surface (131) and the second positioning surface (132) are respectively located on two opposite sides of the scanning structure (130), the first positioning surface (131) ) is an arc surface, the second positioning surface (132) is a plane, the cross-sectional shape of the scanning structure (130) is an axisymmetric figure, and the symmetry axis of the scanning structure (130) passes through the first positioning surface (131) and the second positioning surface (132).
The dental scanning rod according to claim 1, characterized in that: the connecting member (200) is provided with an abutting portion (240), and the abutting portion (240) is located at the bottom of the mounting seat (210), The abutting portion (240) extends toward the outer circumference of the mounting seat (210), and the top end of the abutting portion (240) abuts against the bottom of the working part (100).