Transplant socket preparation guide plate and manufacturing method thereof

Abstract

The present invention provides a transplant socket preparation hole guide plate, comprising a first substrate and a transplant guide sleeve arranged thereon, wherein the first substrate is fixedly mounted to the periphery of the recipient area, and the movable guide sleeve is used to prepare the root socket of the donor tooth. The transplant socket preparation hole guide plate of the present invention has a simple structure and is easy to use, thereby reducing the difficulty of the autologous tooth transplantation operation. The preparation accuracy of the alveolar socket of the recipient area is improved, so that the alveolar socket prepared by the guide has a high degree of matching with the virtually designed alveolar socket. In addition, the guide plate can also effectively ensure that the donor tooth and the recipient area match and occlude.

Description

Technical Field

[0001] The invention belongs to the field of tooth transplantation, and in particular relates to a transplantation socket preparation hole guide plate and a manufacturing method thereof. Background Art

[0002] Autologous tooth transplantation technology is to transplant the donor tooth to the required recipient area in the same body. Clinically, autologous tooth transplantation is often used to treat edentulous teeth caused by caries, periodontitis, pulp disease or trauma. The transplant recipient area can be the alveolar socket where the diseased tooth was immediately extracted or the alveolar socket formed through surgical preparation. The early alveolar socket preparation was to directly use the donor tooth to try the recipient socket after extracting the donor tooth, and the preparation was performed multiple times. However, the disadvantage of this preparation method is that the longer donor tooth separation time and the pressure of trying the donor tooth root may damage the activity of the periodontal membrane on the root surface, and the activity of the periodontal membrane is a key factor affecting the success rate of tooth transplantation.

[0003] In recent years, computer virtual design and rapid prototyping technology have greatly promoted the development of autologous tooth transplantation technology. Using 3D printing technology, individual replicas of donor teeth with local splints and surgical templates were designed and produced, and applied to autologous tooth transplantation surgery, shortening the operation time and improving the survival rate of transplanted teeth. However, the preparation of the alveolar socket relies only on the doctor's feel and experience, and the guide design is insufficient. There may be a deviation between the prepared recipient socket and the target position of the virtual design. Computer virtual design is used to simulate the position and occlusion of the transplanted tooth after surgery; at the same time, a digital surgical guide is made to improve the preparation accuracy of the alveolar socket in the implant area, and a cylindrical hollow tube is used to limit the depth and angle of the ball drill for alveolar socket preparation. The advantage is that the treatment process becomes more predictable and accurate, and the accuracy of the recipient socket preparation is improved compared with traditional autologous tooth transplantation, and the operation time is shortened. However, there are defects in the design of the digital surgical guide. The cylindrical catheter opens at a higher position above the face. Affected by the patient's opening, the ball drill is not easy to enter the catheter when preparing the alveolar socket. If the implantation direction is from distal to mesial, the catheter opening will be biased toward the distal side, making it more difficult to position the ball drill, which in turn increases the difficulty of clinical operation. Summary of the invention

[0004] In view of this, the present invention aims to provide a transplant socket preparation guide plate to solve the problem that the preparation accuracy of the alveolar socket in the implant area is lower than that of the donor tooth and does not match the donor tooth.

[0005] To achieve the above object, the technical solution of the present invention is achieved as follows:

[0006] A transplant socket preparation guide plate comprises a first base plate and a transplant guide sleeve arranged thereon. The first base plate is fixedly mounted to the periphery of the implanted area, and the transplant guide sleeve is used for preparing the root socket of the donor tooth.

[0007] Furthermore, the inner ring contour of the transplant guide sleeve is the same as the outer peripheral contour of the root of the donor tooth.

[0008] Furthermore, the cross section of the first substrate is an arc-shaped structure, and the arc-shaped structure has the same curvature as the dental arch of the implant area.

[0009] Furthermore, two ends of the first substrate are respectively provided with embedding grooves, and the inner circle size of the embedding grooves is the same as the outer circle size of the adjacent teeth.

[0010] Furthermore, a groove is provided at the lower end of the first substrate, and the inner circle contour of the groove matches the periphery of the dental arch and the periphery of the tissue surface.

[0011] Furthermore, the ball drill bit is located at the inner ring of the transplant guide sleeve, and a stopper is installed on the ball drill handle, and one end of the stopper is in contact with and connected to the outer edge of the transplant guide sleeve.

[0012] Compared with the prior art, the implant socket preparation guide plate of the present invention has the following beneficial effects:

[0013] (1) The implant socket preparation guide plate of the present invention has a simple structure and is easy to use, which reduces the difficulty of autologous tooth transplantation surgery. The preparation accuracy of the alveolar socket in the implant area is improved, so that the prepared alveolar socket and the virtually designed alveolar socket have a high degree of matching. In addition, the guide plate can effectively ensure that the donor tooth and the implant area match each other.

[0014] (2) The implant socket preparation guide plate of the present invention is located at Below the surface, it is convenient for the ball drill to enter the guide sleeve for alveolar socket preparation, which reduces the requirement for the patient's opening degree and increases the convenience of clinical operation.

[0015] (3) The transplant socket preparation guide plate of the present invention can greatly shorten the time that the donor tooth is out of the body during the operation, greatly protect the activity of periodontal ligament cells, and improve the success rate of autologous tooth transplantation.

[0016] Another object of the present invention is to provide a method for manufacturing a guide plate for preparing a hole for a transplant socket, so as to solve the problem of low manufacturing precision and low manufacturing efficiency of the guide plate for preparing a hole for a transplant socket.

[0017] To achieve the above object, the technical solution of the present invention is achieved as follows:

[0018] A method for manufacturing a guide plate for preparing a hole for a transplant socket comprises the following steps:

[0019] S1. Scan the donor tooth and the recipient area through CBCT, analyze the data of the donor tooth and the recipient area, and import the data into the design software;

[0020] S2, the donor tooth was tracked by software and marked from the maxillary and mandibular bones;

[0021] S3, making a plaster model, scanning the plaster model with a 3D scanner, and importing the data into the design software;

[0022] S4. Perform three-dimensional reconstruction of the recipient area, jawbone and donor tooth in the design software, and embed the three-dimensional model of the donor tooth into the recipient area to determine the three-dimensional model of the recipient area.

[0023] S5, generating a first substrate fixed to the periphery of the implanted area according to a three-dimensional model of the periphery of the implanted area;

[0024] S6, making an opening on the first substrate according to the donor tooth implantation area, and making a transplantation guide sleeve model in the opening according to the outer contour of the donor tooth;

[0025] S7, inputting the first substrate and transplantation guide sleeve model data obtained in step 6 into a 3D printer, and molding them by the 3D printer.

[0026] Furthermore, the analysis of the donor tooth data in step 1 includes analyzing the mesiodistal and buccolingual widths, root length, cervical margin line, root morphology, and crown-to-root ratio of the donor tooth.

[0027] Furthermore, analyzing the data of the implanted area in step 1 includes analyzing the width and height of the alveolar bone in the implanted area, the distance between the donor tooth and the adjacent teeth after transplantation, and the distance between the donor tooth and the maxillary sinus or the alveolar nerve canal.

[0028] Furthermore, in step 6, the peripheral contour of the donor tooth includes the cross-sectional contour of the cementoenamel junction and the cross-sectional contours of the root layer by layer from the cementoenamel junction to the root apex.

[0029] Compared with the prior art, the method for manufacturing a guide plate for preparing a hole for a transplant socket according to the present invention has the following advantages:

[0030] (1) The method for making a transplant socket preparation guide plate described in the present invention uses a computer to virtually design the transplant position of the donor tooth, designs the transplant socket preparation guide plate to guide the preparation of the recipient tooth socket, makes the size of the transplant socket preparation guide plate data model match the size of the recipient area and the donor tooth, and uses 3D printing to make the block to meet the customization requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the accompanying drawings:

[0032] Figure 1 It is a structural schematic diagram of a guide plate for preparing a hole for a transplant socket according to an embodiment of the present invention;

[0033] Figure 2A top view of a transplant socket preparation guide plate matching the outer contour of the cementoenamel junction according to an embodiment of the present invention;

[0034] Figure 3 This is a schematic structural diagram of a donor tooth according to an embodiment of the present invention;

[0035] Figure 4 A top view of the outer contour of the tooth root at a relative position of 2MM in the axial direction according to the embodiment of the present invention matching the guide plate for preparing the hole for the transplant socket;

[0036] Figure 5 This is a top view of the outer contour of the tooth root at a relative position of 8MM in the axial direction described in an embodiment of the present invention matching the transplant socket preparation guide plate.

[0037] Description of reference numerals:

[0038] 1-first substrate; 2-transplantation guide sleeve; 3-cementum-enamel junction; 4-tooth root. DETAILED DESCRIPTION

[0039] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0040] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying 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 limiting the present invention. In addition, the terms "first", "second", and the like are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", and the like may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0041] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0042] The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments.

[0043] like Figure 1 The transplant socket preparation hole guide plate shown includes a first base plate 1 and a transplant guide sleeve 2 arranged thereon. The first base plate 1 is fixedly installed to the periphery of the implanted area, and the movable guide sleeve is used to prepare the root socket of the donor tooth. During the operation, the staff fixes the first base plate 1 in the implanted area, and the first base plate 1 stably guides the transplant socket preparation hole of the transplant operation. The inner edge line of the transplant guide sleeve 2 is consistent with the contour of the tooth neck line of the transplanted tooth, and the direction of the transplant guide sleeve 2 coincides with the transplantation direction of the tooth to be transplanted. The transplant guide sleeve is used to prepare the root socket of the donor tooth.

[0044] In the process of preparing the transplant socket hole, multiple transplant guide sleeves are required. The inner edge contour of the transplant guide sleeve 2 in each transplant guide sleeve is different, and the structure of the first substrate 1 is the same. Taking the preparation of five transplant guide sleeves as an example, the inner edge contour of the transplant guide sleeve 2 in the transplant socket hole preparation guide plate used first is the same as the outer contour of the enamel-cementum junction 3 of the donor tooth, and the guide sleeves in the other four transplant socket hole preparation guide plates are arranged in a gradient of 2mm, that is, the transplant guide sleeve 2 matches the outer contour of the root 4 of the donor tooth at an axial relative position of 2mm, 4mm, 6mm, and 8mm depth. In application, the number of root socket guide plates is made according to the actual root length of the donor tooth and the preset gradient size, which will not be repeated here.

[0045] The cross-section of the first substrate 1 is an arc-shaped structure, which has the same curvature as the dental arch of the implanted area. Both ends of the first substrate 1 are provided with embedding grooves, and the inner circle size of the embedding grooves is the same as the outer circle size of the adjacent teeth. The lower end of the first substrate 1 is provided with a groove, and the inner circle contour of the groove matches the outer periphery of the dental arch and the outer periphery of the tissue surface. The ball drill bit is located on the inner circle of the transplant guide sleeve 2, and a stop plate is installed on the ball drill handle. One end of the stop plate is in contact with the outer edge of the transplant guide sleeve 2, and the stop plate is combined to limit the depth of preparation of the implanter ball drill.

[0046] The method for making a guide plate for preparing a tooth socket for transplantation comprises the following steps:

[0047] S1. Take a CT scan of the patient's oral cavity, select a transplant donor tooth based on the patient's alveolar bone, tooth root 4, tooth crown, missing tooth position and other information, analyze the donor tooth and the recipient area to ensure that the selected donor tooth matches the recipient area; directly scan the patient's oral cavity with an intraoral scanner, or scan the patient's oral model / impression with a model scanner to obtain a digital model of the patient's oral cavity; fit the CBCT data (i.e., bone information data) and the digital model data obtained by the scanner and perform three-dimensional reconstruction of the jaw; reconstruct the three-dimensional model of the donor tooth, place the donor tooth model in the recipient area, make the implantation depth of the transplanted tooth consistent with the adjacent tooth, have no interference with the adjacent tooth root 4, maintain a safe distance, and have no occlusal contact with the opposing tooth, and determine the final implantation position of the donor tooth;

[0048] S2. In the digital preoperative design software, a first base plate 1 fixed on the teeth is virtually generated according to the patient's dentition morphology; then a transplant guide sleeve 2 is generated to limit the implant ball drill used in the operation, wherein the inner edge of the transplant guide sleeve 2 is set according to the cross-sectional contour of the donor tooth enamel cementum junction 3; thereafter, the generated transplant guide sleeve 2 is transferred to the position corresponding to the donor tooth on the base plate, and the inner edge of the transplant guide sleeve 2 is adjusted so that the transplant guide sleeve 2 of the transplant socket preparation hole guide plate matches the cross-sectional contour of the donor tooth enamel cementum junction 3, respectively, to obtain a transplant socket preparation guide plate model;

[0049] S3. In the digital preoperative design software, a first base plate 1 fixed on the teeth is virtually generated according to the patient's dentition morphology; then multiple transplant guide sleeves 2 are generated to limit the implant ball drill used in the operation, wherein the transplant guide sleeve 2 refers to a guide sleeve that is progressive from the cementoenamel junction 3 to the root apex at a depth of 2mm / layer of bone, that is, 2mm, 4mm, 6mm, 8mm in depth and matches the outer edge line of the cross-sectional contour of the root 4 at the corresponding depth. Afterwards, each generated transplant guide sleeve 2 is transferred to the position corresponding to the donor tooth on the base plate, and the axial direction of the transplant guide sleeve 2 is adjusted so that the axial direction of the transplant guide sleeve 2 is consistent with the implantation direction of the transplanted tooth, and 4 hole preparation guide plate models are obtained;

[0050] S4. Output all surgical guide plate models obtained in steps 2 and 3 to a 3D printer in STL format, and print them out to obtain one transplant socket preparation guide plate and four root socket preparation hole guide plates. The transplant socket preparation guide plate and the four root socket preparation hole guide plates are combined to form the transplant socket preparation hole guide plate, and the transplant socket preparation guide plate and the four root socket preparation hole guide plates are used one by one during surgery.

[0051] The analysis of the donor tooth data in step 1 includes analyzing the mesiodistal and buccolingual widths of the donor tooth, the length of the root 4, the cervical margin line, the morphology of the root 4, and the ratio of the crown to the root 4. The analysis of the recipient area data in step 1 includes analyzing the width and height of the alveolar bone in the recipient area, the distance between the donor tooth and the adjacent teeth after transplantation, and the distance from the maxillary sinus or the lower alveolar nerve canal.

[0052] The digital preoperative planning software is ProPlan CMF 3.0 software and Mimics Medical 21.0 software.

[0053] The method of performing an autologous tooth transplantation operation using the transplant socket preparation guide plate as described above is as follows:

[0054] A1. Perform local anesthesia on the surgical area.

[0055] A2. The staff uses minimally invasive extraction to remove teeth that cannot be retained in the implant area.

[0056] A3. Place the implant socket preparation hole guide plate on the dentition of the recipient area. The implant socket preparation hole guide plate should fit the patient's jaw completely. Press the jaw of the guide plate to ensure that the guide plate is stable and does not shake. Fix the stop plate of the implant ball drill outside the mouth to a depth of 2mm. Place the implant ball drill (d=2mm) in the guide sleeve of this guide plate. Keep the handle of the drill close to the wall of the guide sleeve and keep it vertical to start bone removal. After reaching the fixed depth, move along the inner edge of the guide sleeve to prepare the implant socket. After that, remove the implant socket preparation hole guide plate and replace it with 4 root socket preparation hole guide plates with depths of 2, 4, 6, and 8mm in turn. Place the implant ball drill with the corresponding stop depth fixed in the guide sleeve of the replaced guide plate. Prepare 4 root sockets of different depths in turn, trim the inner walls of the 4 root sockets, and eliminate the steps and undercuts on the inner walls until the alveolar socket of the recipient area is prepared.

[0057] A4. After the alveolar socket of the recipient area is prepared, try to implant the 3D printed model of the donor tooth. If the model can be successfully positioned in the preoperative designed position, the preparation is complete; if not, continue preparation.

[0058] A5. After the preparation is completed, the donor tooth of the selected patient is extracted minimally invasively and immediately implanted into the prepared alveolar socket.

[0059] A6. Use resin and thin steel wire to elastically fix the donor tooth.

[0060] A7. Adjust the jaw of the donor tooth so that there is no occlusal interference, thus completing the transplantation of the autologous tooth.

[0061] 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, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A method for manufacturing a guide plate for preparing a hole for a transplant socket, characterized in that: The method is realized by a transplant socket preparation guide plate, which comprises a first base plate (1) and a transplant guide sleeve (2) arranged thereon, wherein the first base plate (1) is fixedly mounted to the periphery of the implanted area, and the transplant guide sleeve (2) is used to prepare the root socket of the donor tooth; The inner contour of the transplant guide sleeve (2) is the same as the outer contour of the root (4) of the donor tooth; The cross section of the first substrate (1) is an arc-shaped structure, and the arc-shaped structure has the same curvature as the dental arch of the implant area; Both ends of the first base plate (1) are respectively provided with embedding grooves, and the inner circle size of the embedding groove is the same as the outer circle size of the adjacent tooth; A groove is provided at the lower end of the first base plate (1), and the inner circle contour of the groove matches the periphery of the dental arch and the periphery of the tissue surface; The ball drill bit is located at the inner ring of the transplant guide sleeve (2), and a stopper is installed on the ball drill handle, and one end of the stopper is in contact with and connected to the outer edge of the transplant guide sleeve (2); The preparation method comprises the following steps: S1. Scan the donor tooth and the recipient area through CBCT, analyze the data of the donor tooth and the recipient area, and import the data into the design software; S2, the donor tooth was tracked by software and marked from the maxillary and mandibular bones; S3, making a plaster model, scanning the plaster model with a 3D scanner, and importing the data into the design software; S4. Perform three-dimensional reconstruction of the recipient area, jawbone and donor tooth in the design software, and embed the three-dimensional model of the donor tooth into the recipient area to determine the three-dimensional model of the recipient area; S5, generating a first substrate (1) fixed to the periphery of the implanted area according to a three-dimensional model of the periphery of the implanted area; S6, making an opening on the first substrate (1) according to the donor tooth implantation area, and making a transplantation guide sleeve (2) model in the opening according to the outer contour of the donor tooth; S7, inputting the model data of the first substrate (1) and the transplantation guide sleeve (2) obtained in step 6 into a 3D printer, and forming them by the 3D printer; Analyzing the donor tooth data in step 1 includes analyzing the mesiodistal and buccolingual widths of the donor tooth, the length of the root (4), the cervical margin line, the morphology of the root (4), and the ratio of the crown to the root (4); Analyzing the data of the implant area in step 1 includes analyzing the width and height of the alveolar bone in the implant area, the distance between the donor tooth and the adjacent teeth after transplantation, and the distance between the donor tooth and the maxillary sinus or the alveolar nerve canal.

2. The method for manufacturing a guide plate for preparing a hole for a transplant socket according to claim 1, characterized in that: In step 6, the peripheral contour of the donor tooth includes the cross-sectional contour of the cementoenamel junction (3) and the cross-sectional contour of the root (4) layer by layer from the cementoenamel junction (3) to the root apex.

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