Combined nail for edentulous jaw implantation guide plate

Abstract

The utility model discloses a combined nail for an edentulous jaw implantation guide plate, which comprises a retention nail and a positioning nail, and the retention nail is detachably connected to the top of the positioning nail; the positioning nail comprises a nail head and a positioning rod, the positioning rod is connected with one end of the nail head, and a connecting groove used for being connected with the retention nail is formed in the end, away from the positioning rod, of the nail head. The nail head comprises a hexagonal part and a conical part, the hexagonal part is connected with the positioning rod, and the connecting groove is formed in the end, away from the hexagonal part, of the conical part. The combined nail disclosed by the technology is applied to the technical field of edentulous jaw implantation, the registration, positioning and fixing effects on an implantation guide plate are good, by using the combined nail, the implantation precision can be improved, the operation stability can be improved, the hole preparation precision and the hole preparation quality can be improved, and the practicability is high. More rational conditions are provided for postoperative recovery and combination of the dental implant and the alveolar bone, and the success rate of an edentulous jaw implantation operation is increased.

Description

Technical Field

[0001] This utility model relates to the field of dental implant technology, and in particular to a combination screw for a guide plate for edentulous jaw implantation. Background Technology

[0002] Edentulous jaw implantation refers to the placement of implants in the jawbone where all upper teeth, all lower teeth, or both upper and lower teeth are missing. During edentulous jaw implantation, especially in cases requiring immediate loading, implant guides are often used to achieve better placement paths, better restorative outcomes, better osseointegration, and better stress distribution. Edentulous jaw implant guides are tools used to assist surgeons in implant placement. In oral implant surgery, they accurately guide the implant site and prepare the cavity, preventing implant site deviation caused by poor visibility or lateral deviation during surgery. This significantly shortens the surgery time, improves efficiency, reduces the reliance on the surgeon's experience, enhances the accuracy of cavity preparation and the safety of the implant, and effectively reduces the difficulty of edentulous jaw implantation surgery.

[0003] Existing implant guides for edentulous jaws are limited by the functionality and technology of current software. The design of current implant guides for edentulous jaws requires two CT scans (referred to as the double CT method). A special radiographic guide is also needed to align the patient's soft tissue surface with the alveolar bone after the two CT scans. In practice, a positioning guide and an implant guide are required, which is cumbersome, costly, and time-consuming. Furthermore, in the double CT method, the soft tissue surface morphology is based on the lower surface of the radiographic guide obtained from the second CT scan. The three-dimensional morphology of the guide's lower surface is generated based on this, and imaging parameters need to be adjusted. However, in reality, the radiographic guide does not perfectly conform to the patient's soft tissue surface, resulting in a significant error between the obtained three-dimensional image data of the radiographic guide and the actual data. This leads to a large error in the fabricated implant guide, resulting in large preparation errors and poor clinical feedback. Utility Model Content

[0004] In view of the shortcomings of related technologies, the purpose of this utility model is to provide a combination of screws for implant guides for edentulous jaws, which aims to solve the technical problem that implant guides made by existing technologies have large errors and result in large errors in hole preparation.

[0005] This utility model discloses a combination screw for an edentulous implant guide, comprising: a retention screw and a positioning screw, wherein the retention screw is detachably connected to the top of the positioning screw; the positioning screw comprises: a screw head and a positioning rod, wherein the positioning rod is connected to one end of the screw head, and the end of the screw head away from the positioning rod is provided with a connecting groove for connecting the retention screw; the screw head comprises a hexagonal portion and a conical portion, wherein the hexagonal portion is connected to the positioning rod, and the connecting groove is formed on the side of the conical portion away from the hexagonal portion.

[0006] The retaining pin includes a retaining cap and a retaining rod. The retaining cap is larger than the retaining rod, and the retaining rod is detachably connected to the connecting groove.

[0007] Specifically, the size of the conical portion gradually decreases from the end closest to the hexagonal portion to the end furthest from the hexagonal portion.

[0008] Specifically, the shape of the connecting groove is adapted to the shape of the fixing rod, the inner diameter of the connecting groove is adapted to the outer diameter of the fixing rod, and the bottom of the connecting groove is set as a conical bottom.

[0009] Specifically, the fixing rod is threaded into the connecting groove.

[0010] The outer surface of the positioning rod is provided with self-tapping threads, and the end of the positioning rod away from the nail head is a pointed end.

[0011] Optionally, the positioning pin may be a stainless steel positioning pin or a titanium alloy positioning pin, but is not limited to these.

[0012] Optionally, the outer surfaces of the hexagonal and conical portions are coated.

[0013] The present invention discloses a combination of staples for implant guides in edentulous jaws, comprising: a retention staple and a positioning staple, wherein the retention staple is detachably connected to the top of the positioning staple; the positioning staple comprises: a staple head and a positioning rod, wherein the positioning rod is connected to one end of the staple head, and the end of the staple head away from the positioning rod is provided with a connecting groove for connecting the retention staple; the staple head comprises a hexagonal portion and a conical portion, wherein the hexagonal portion is connected to the positioning rod, and the connecting groove is provided at the end of the conical portion away from the hexagonal portion. The positioning pins in this technology are fixed in the alveolar bone to assist in the fabrication of the implant guide, reducing fabrication errors. Furthermore, during implantation, the positioning pins and retention pins work together. The positioning pins are fixed in the alveolar bone and confined to the lower side of the implant guide, while the retention pins are confined to the upper side of the implant guide. This ensures the implant guide fits tightly against the patient's soft tissue surface, achieving both positioning and retention. Compared to traditional edentulous implant guides that rely on the fit between the bottom of the guide and the soft tissue for single positioning, this technology effectively improves the positioning accuracy and reliability of the implant guide in edentulous jaws, further reducing the reliance on the surgeon's experience. Attached Figure Description

[0014] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without any innovative effort.

[0015] Figure 1This is an overall structural diagram of the combined nail disclosed in the embodiments of this utility model;

[0016] Figure 2 This is a cross-sectional view of the combined nail disclosed in the embodiment of this utility model;

[0017] Figure 3 This is a schematic diagram of the positioning pin disclosed in the embodiment of this utility model;

[0018] Figure 4 This is a schematic diagram of the structure of the fixing nail disclosed in the embodiment of this utility model;

[0019] Figure 5 This is a schematic diagram of the implantation guide plate prepared in the embodiment of the present invention from a first perspective (side closer to the soft tissue facing upwards);

[0020] Figure 6 This is a schematic diagram of the implantation guide plate prepared in the embodiment of the present invention from a second perspective (side away from soft tissue facing upwards);

[0021] Figure label:

[0022] 1000, Planting guide plate; 100, Planting hole; 200, Positioning hole; 201, Countersunk hole; 202, Hexagonal hole; 1, Fixing pin; 11, Fixing cap; 12, Fixing rod; 121, External thread; 2, Positioning pin; 21, Pin head; 211, Hexagonal part; 2111, Internal thread; 212, Conical part; 213, Connecting groove; 2131, Conical bottom; 22, Positioning rod; 221, Pointed end; 222, Self-tapping thread; Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some, not all, of the embodiments of the present utility model. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0024] It should be understood that, when used in this specification and the appended claims, the terms “comprising” and “including” indicate the presence of the described features, integrals, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components and / or collections thereof.

[0025] It should also be understood that the terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the scope of the invention. As used in this specification and the appended claims, the singular forms “a,” “an,” and “the” are intended to include the plural forms unless the context clearly indicates otherwise.

[0026] It should also be further understood that the terms "and" and "or" as used in this specification and the appended claims refer to any combination of one or more of the associated listed items and all possible combinations, and include such combinations.

[0027] The above are merely specific embodiments of this utility model, but the protection scope of this utility model is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in this utility model, and these modifications or substitutions should all be covered within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

[0028] This utility model discloses a combination of screws for implant guides in edentulous jaws, such as... Figure 1-2 As shown, it includes: a retention screw 1 and a positioning screw 2. The retention screw 1 is detachably connected to the top of the positioning screw 2. During dental implant surgery, the positioning screw 2 is fixed in the alveolar bone and placed on the lower side of the implant guide 1000, while the retention screw 1 is placed on the upper side of the implant guide 1000. The positioning screw 2 includes: a screw head 21 and a positioning rod 22. The positioning rod 22 is connected to one end of the screw head 21. The end of the screw head 21 away from the positioning rod 22 is provided with a connecting groove 213 for connecting the retention screw 1. The screw head 21 includes a hexagonal portion 211 and a conical portion 212, such as... Figure 3 As shown, the hexagonal portion 211 is connected to the positioning rod 22, and the connecting groove 213 is opened on the end side of the conical portion 212 away from the hexagonal portion 211. When the positioning rod 22 is installed in the alveolar bone, the hexagonal portion 211 facilitates the installation of tools for operation, and the conical portion 212 facilitates the installation of the implant guide 1000, ensuring that the implant guide 1000 can be smoothly installed on multiple positioning pins 2. In specific implementation, the positioning pins 2 are fixed in the soft tissue and alveolar bone, and the implant guide 1000 is placed in the patient's mouth. The implant guide 1000 is provided with an implant hole 100 and a positioning hole 200, such as... Figure 5-6As shown, the position of the positioning hole 200 corresponds to the positioning pin 2. The side of the positioning hole 200 near the soft tissue has a hexagonal hole 202 that matches the hexagonal part 211 of the pin head 21. The side of the positioning hole 200 away from the soft tissue has a countersunk hole 201 that matches the fixing cap 11. By placing the fixing pin 1 in the countersunk hole 201 of the implantation guide plate 1000 and screwing it into the connecting groove 213 of the positioning pin 2 at the corresponding position, the implantation guide plate 1000 can be accurately and stably fixed on the soft tissue surface and provide stable support for the implantation guide plate 1000, thus preparing for subsequent hole preparation and implantation.

[0029] The retaining pin 1 includes: a retaining cap 11 and a retaining rod 12, such as Figure 4 As shown, the size of the fixing cap 11 is larger than that of the fixing rod 12. The fixing rod 12 is detachably connected to the connecting groove 213. The retaining pin 1 is screwed into the positioning pin 2, which can achieve vertical fixation of the implant guide, making the force on the implant guide more uniform and the overall positioning more accurate and reliable. This avoids the situation where the implant guide is easily tilted and detached from the soft tissue due to the traditional positioning pin positioning the implant guide from the side. It further improves the positioning accuracy and reliability of the implant guide on the edentulous occlusal surface, making the cavity preparation process more stable and smooth.

[0030] The size of the conical portion 212 gradually decreases from the end near the hexagonal portion 211 to the end away from the hexagonal portion 211. This arrangement makes it easy for the conical portion 212 to be inserted into the positioning hole of the planting guide plate 1000, avoiding the situation where insertion is difficult.

[0031] The shape of the connecting groove 213 is adapted to the shape of the fixing rod 12, and the inner diameter of the connecting groove 213 is adapted to the outer diameter of the fixing rod 12, so that the fixing rod 12 can be smoothly inserted into the connecting groove 213. In this embodiment, the fixing rod 12 is cylindrical, the connecting groove 213 is a cylindrical connecting groove, and the bottom of the connecting groove 213 is set as a conical bottom 2131 to facilitate the insertion of fixing rods 12 of different shapes.

[0032] The fixing rod 12 is threadedly connected to the connecting groove 213. Specifically, the outer wall of the fixing rod 12 and the inner wall of the connecting groove 213 are respectively provided with matching external threads 121 and internal threads 2111 to realize the detachable connection between the fixing rod 12 and the connecting groove 213.

[0033] The outer surface of the positioning rod 22 is provided with a self-tapping thread 222. The end of the positioning rod 22 away from the nail head 21 is a pointed end 221. The pointed end 221 facilitates the positioning rod 22 to pass through the soft tissue and screw into the alveolar bone. By providing a self-tapping thread 222 on the outer surface of the positioning rod 22, the positioning rod 22 can be stably fixed to the alveolar bone. After installation, the nail head 21 is partially or completely exposed above the soft tissue surface. This setting can also be used to obtain an impression of the soft tissue and nail head 21 structure by using an impression method. Then, the impression is scanned by a scanner, and the data is compared with the intraoral scan data, which can reduce the superposition error that may be caused by the intraoral scan.

[0034] Positioning pin 2 is one of stainless steel positioning pins or titanium alloy positioning pins, but not limited to this. Both stainless steel positioning pins and titanium alloy positioning pins are high-density materials, which can obtain clear images during CT scans, thus enabling the reconstruction of three-dimensional graphics.

[0035] Specifically, the outer surfaces of the hexagonal portion 211 and the conical portion 212 are coated with a coating that can be prepared by sandblasting or acid etching, so that the hexagonal portion 211 and the conical portion 212 can be clearly scanned by an intraoral scanner, thereby obtaining a three-dimensional image of the nail head 21 while scanning soft tissue intraorally.

[0036] In a specific embodiment, 3-4 combination nails from this technology are selected, and an appropriate position is chosen on the edentulous jaw surface of the patient to be implanted. A machine-operated socket wrench and implant handpiece are used to drill the pointed end 221 of the positioning nail 2 into the soft tissue and alveolar bone and fix it in the alveolar bone, with the nail head 21 partially or completely exposed above the soft tissue surface. A CT scan is taken of the patient at the outpatient end to obtain image data of the alveolar bone and positioning nail 2, which serves as the first CT data. An intraoral scanner is used to scan the patient's intraoral soft tissue to obtain three-dimensional data of the soft tissue and positioning nail 2. Alternatively, an impression of the soft tissue and positioning nail 2 is obtained using an impression method, and then the impression is scanned to obtain three-dimensional data of the soft tissue and positioning nail 2. The 3D data of implant guide 2 is obtained from the intraoral scan. The outpatient department sends the first CT scan data and the intraoral scan data to the implant lab. After receiving the data, the implant lab uses specialized design software to design the implant guide 1000 and the temporary tooth, obtaining the implant guide file and the temporary tooth file. During the design process, the designer aligns the soft tissue image data and the CT image data according to the structural features of implant guide 2 exposed above the soft tissue surface in the first CT scan data and the intraoral scan data to reduce superposition errors. The implant lab sends the implant guide file and the temporary tooth file to the outpatient department. The doctor uses a chairside 3D printer to print the implant guide 1000 and the temporary tooth. The structural diagram of the implant guide 1000 is shown below. Figure 5-6As shown, the implant guide plate 1000 is provided with an implantation hole 100 for preparing the cavities and a positioning hole 200 corresponding to the position of the positioning pin 2. The doctor places the implant guide plate into the patient's mouth, the conical part 212 of the positioning pin 2 is inserted into the positioning hole of the implant guide plate, and the hexagonal part 211 of the positioning pin 2 is embedded in the hexagonal hole 202 of the implant guide plate 1000. Under the joint positioning action of the positioning pin 2 and the soft tissue, the implant guide plate 1000 is accurately positioned. Using an installation tool, the retention pin 1 is screwed from the countersunk hole 201 into the positioning hole 2. 00. Connecting slot 213 to achieve accurate positioning and stable retention of implant guide plate 1000 on the edentulous jaw surface of the patient to be implanted; under the guidance and positioning of implant guide plate 1000, the dentist prepares the hole at implant hole 100 and inserts the implant; after implantation, the dentist uses installation tools (screwdriver) and implant handpiece to remove retention pin 1, removes implant guide plate 1000, and uses socket wrench and implant handpiece to remove positioning pin 2; the dentist installs the temporary tooth on the implant to complete the patient's edentulous jaw implantation.

[0037] This invention discloses a combination of staples for implant guides in edentulous jaws, which has both positioning and retention functions. It can obtain the three-dimensional morphology of the alveolar bone and soft tissue surfaces in a single CT scan and a single intraoral scan, and achieve alignment between the three-dimensional morphology of the soft tissue surface and the three-dimensional morphology of the alveolar bone, avoiding the need for a second CT scan. Moreover, by using this combination of staples in conjunction with the implant guide, the implantation accuracy can be improved, the stability of the operation can be enhanced, and the accuracy and quality of cavity preparation can be improved. This addresses the issue of large positioning errors and instability of implant guides in traditional edentulous jaw implantation, which affect the accuracy of the implantation operation, reduces surgical risks, provides more rational conditions for postoperative recovery and the integration of the dental implant with the alveolar bone, and improves the success rate of edentulous jaw implant surgery.

[0038] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any equivalent modifications or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A combination screw for implant guides in edentulous jaws, characterized in that, include: Retention pins and positioning pins; retention pins are detachably connected to the top of positioning pins. The positioning pin includes: a pin head and a positioning rod, with the positioning rod connected to one end of the pin head, and the end of the pin head away from the positioning rod having a connecting groove for connecting the positioning pin; The nail head includes a hexagonal part and a conical part. The hexagonal part is connected to the positioning rod, and the connecting groove is opened on the side of the conical part away from the hexagonal part.

2. The combination screw for an edentulous jaw implant guide according to claim 1, characterized in that, The retaining pin includes a retaining cap and a retaining rod. The retaining cap is larger than the retaining rod, and the retaining rod is detachably connected to the connecting groove.

3. The combination screw for an edentulous jaw implant guide according to claim 1, characterized in that, The size of the conical portion gradually decreases from the end closest to the hexagonal portion to the end furthest from the hexagonal portion.

4. The combination screw for an edentulous jaw implant guide according to claim 2, characterized in that, The shape of the connecting groove is adapted to the shape of the fixing rod, the inner diameter of the connecting groove is adapted to the outer diameter of the fixing rod, and the bottom of the connecting groove is set as a conical bottom.

5. The combination screw for an edentulous jaw implant guide according to claim 4, characterized in that, The fixing rod is threaded into the connecting groove.

6. The combination screw for an edentulous jaw implant guide according to claim 1, characterized in that, The outer surface of the positioning rod is provided with self-tapping threads, and the end of the positioning rod away from the nail head is a pointed end.

7. The combination screw for an edentulous implant guide plate according to claim 1, characterized in that, The positioning pin is one of stainless steel positioning pins or titanium alloy positioning pins.

8. The combination screw for an edentulous jaw implant guide according to claim 1, characterized in that, The outer surfaces of the hexagonal and conical parts are coated.

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