Customized detachable edentulous immediate load-bearing fixed false tooth and manufacturing method thereof

Abstract

The invention discloses a customized detachable edentulous immediate load-bearing fixed denture and a manufacturing method thereof, and relates to the technical field of human oral medicines.The device comprises a plurality of customized implants, retention connectors, corresponding repair bases and repair base inner screws, the lower ends of the customized implants are implanted into alveolar bones, the upper ends of the customized implants are flush with gingiva, and the lower ends of the customized implants are connected with the retention connectors. The retention connector is of a strip-shaped structure, is horizontally laid above the customized implants along the tooth jaw shape and is used for connecting the implants at the planting points into a whole, the repair abutment is arranged above the retention connector, and the repair abutment inner screw is used for penetrating through the retention connector to connect the repair abutment with the customized implants; the technical scheme provided by the invention is suitable for patients with complete or half tooth loss and free end loss, can realize immediate implantation, immediate repair and immediate load bearing, shortens the repair period, reduces the difficulty of implantation operation and the risk of repair failure, and expands the indications of complete and free end loss of implant teeth.

Description

Technical Field

[0001] The present invention relates to the technical field of human oral medicine, and in particular to a customized detachable edentulous jaw immediate load-bearing fixed denture and a manufacturing method thereof. Background Art

[0002] With the improvement of dental implant technology, oral imaging technology and related computer software technology, many edentulous patients choose full-mouth dental implant restoration instead of the original full-mouth removable denture restoration. Full-mouth dental implant restoration is an oral fixed denture restoration. It does not require cleaning after meals and can be repeatedly removed and worn. Its comfort, aesthetics and chewing function are comparable to original teeth, and it is highly praised by patients and doctors.

[0003] However, full-mouth dental implants require a high amount of bone in the patient's edentulous jaw. The ideal bone volume at the implant site is: the alveolar bone width in the mesiodistal and buccal-lingual directions is greater than 6mm, the height is greater than 10mm, and the number of implants is at least 4 to complete the fixed restoration of the full-mouth edentulous jaw.

[0004] However, there are not many patients with ideal edentulous jaws and alveolar bone volume that meets the conditions for implantation. The actual situation is that due to congenital or acquired reasons, after all the teeth of edentulous patients fall out, the alveolar bone becomes flat and narrow, and the bone volume is insufficient. When making traditional full-mouth removable dentures, due to the flat and narrow alveolar bone, the full-mouth removable dentures cannot generate adsorption force, causing the full-mouth removable dentures to fall off during use and unable to chew. At the same time, the removable dentures have to be taken off and put on after each meal and are uncomfortable, resulting in low patient satisfaction. When making traditional implant dentures, the implant models currently on the market cannot meet the needs of implantation in the case of insufficient bone volume. In this case, bone grafting technology is needed to increase the patient's bone volume first. Not only is the patient in great pain, the surgery is traumatic, the cost is high, and it is time-consuming. It takes a year or even longer to complete the final restoration. The long waiting period for the patient increases the pain of being unable to eat and drink for a long time due to missing teeth. For patients whose bone volume meets the conditions for implantation, after completing a half-mouth full-mouth fixed restoration based on 4 or 6 implants, some implants will develop peri-implantitis due to the inability to regularly disassemble the crown part and clean and maintain the implant part, resulting in implant failure and further failure of the full-mouth fixed restoration. Summary of the Invention

[0005] The purpose of the present invention is to provide a customized detachable edentulous immediate load-bearing fixed denture and a method for making the same, so as to solve the problems in the prior art that implants cannot be implanted when the patient has insufficient bone volume, the repair cycle is long, and the implant cannot be disassembled for cleaning and maintenance.

[0006] The technical solution of the present invention is to provide a customized removable edentulous jaw immediate load fixed denture, the customized removable edentulous jaw immediate load fixed denture comprising: a customized implant, a retaining connector, a restoration abutment and a restoration abutment internal screw, wherein the customized implant comprises at least four;

[0007] The threaded portion of the lower end of the customized implant is set in the alveolar bone, and the upper end is set in the gum. The upper end surface of the customized implant is flush with the gum.

[0008] The retaining connector is a strip-shaped structure that is horizontally laid above each customized implant along the shape of the jaw. A circular hole is provided on the retaining connector at the position corresponding to the customized implant, and the circular hole is used to pass the screw in the repair base. The retaining connector is used to connect the implants at various implantation points into a whole.

[0009] The repair base is arranged above the retaining connector and at a position corresponding to the customized implant. The screw inside the repair base passes through the circular hole on the retaining connector to fix the repair base to the customized implant.

[0010] Furthermore, the lower end of the customized implant is an implant part with a thread, which is used to be implanted into a bone hole pre-drilled on the alveolar bone. The upper end of the customized implant is an inverted frustum-shaped gingival part, and the upper end surface of the gingival part is flush with the surface above the gum.

[0011] Furthermore, a first limiting hole is set at the top center of the gingival part, and a threaded blind hole for screwing into the screw of the repair base is opened at the center of the lower surface of the first limiting hole. The lower end of the threaded blind hole extends to the junction of the implant part and the gingival part.

[0012] Furthermore, the retaining connector includes a retaining portion and a connecting portion;

[0013] The retention part is arranged directly above the customized implant, and its diameter is the same as the diameter of the upper end surface of the gingival part. The connecting part is arranged between two adjacent retention parts and is used to connect multiple retention parts into a whole. The overall shape of the retention connector matches the shape of the corresponding jaw.

[0014] Furthermore, a second limiting hole is provided at the central position of the retaining part, and a circular hole for passing the screw in the repair base is provided at the center of the lower surface of the second limiting hole. The position of the circular hole corresponds to the position of the threaded blind hole. A first limiting step is provided below the retaining part, and the first limiting step is used to sink into the first limiting hole when installing the retaining connector; the contact surface between the connecting part and the mucosa is a static pressure design that matches the mucosal morphology.

[0015] Furthermore, the repair base is arranged directly above the retaining part, and a through hole for installing a screw inside the repair base is provided at the inner center thereof, and the position of the through hole corresponds to the position of the circular hole at the center of the retaining part.

[0016] Furthermore, a second limiting step is provided at the lower end of the repair base, and the second limiting step is used to sink into the second limiting hole when the repair base is installed.

[0017] Furthermore, the customized removable edentulous immediate loading fixed denture also includes a crown and a telescopic crown fastening device;

[0018] The dental crown adopts a telescopic crown, and the telescopic crown fastening device is used to fasten the telescopic crown installed on the restoration abutment. It includes a retention clip, a retention nut and a retention screw. The retention clip is fixedly connected to the retention nut. The retention clip is laterally arranged on the lingual side of the restoration abutment. Retention holes are arranged on the labial side of the crown between adjacent restoration abutments. The retention screws pass through the retention holes from the labial side and are connected to the retention nuts to fasten the dental crown to the restoration abutment.

[0019] The technical solution of the present invention also provides a method for manufacturing a customized removable edentulous immediate load fixed denture, the method comprising:

[0020] S1: Take CBCT images of the patient's oral cavity to obtain three-dimensional image data of the alveolar bone and surrounding gums. Scan the patient's oral cavity with a 3D scanning head to obtain scanning data of the three-dimensional morphology of the gum surface and the vertical distance and occlusal relationship;

[0021] S2: Use modeling software to overlay the image data and scan data, and determine the alveolar bone volume and mucosal thickness based on the overlay image data. The alveolar bone volume includes the width and height of the alveolar bone.

[0022] S3: Determine the number, location, and specifications of customized implants based on the alveolar bone volume and mucosal thickness, and then fabricate them;

[0023] S4: According to the number and position of the customized implants, a retaining connector with matching shape is set, and a corresponding number of restoration abutments and restoration abutment screws are set;

[0024] S5: The crown height is determined based on the vertical distance occlusal relationship data and is manufactured. The telescopic crown fastening device is set on the 4th and 5th teeth selected in the overall crown.

[0025] S6: A double-layer implant guide is set up based on the number, position, and specifications of the customized implants. One layer is set up with small implant holes for drilling and preparing bone holes, and the other layer is set up with large implant holes for implanting customized implants. A restoration abutment guide is set up based on the specifications of the restoration abutment.

[0026] Furthermore, S3 specifically includes:

[0027] The position where the maxillary bone volume meets the implantation conditions is marked as the initial site. The implantation conditions are that the alveolar bone width is greater than 4 mm and the alveolar bone height is greater than 4 mm. More than 4 sites are selected from the initial sites as the implantation sites of customized implants to obtain the number and position of customized implants. The height of the upper end of the gingival part of the customized implant is set according to the thickness of the mucosa so that the upper end surface of the gingival part is flush with the upper surface of the mucosa.

[0028] The beneficial effects of the present invention are:

[0029] First, the technical solution of the present invention can customize the implant based on the bone volume and mucosal distribution at the alveolar implant site during implantation. Based on the alveolar bone volume and mucosal thickness, the number, position and specifications of the customized implants can be determined. When the patient's site has little bone volume, the short implant of the present invention can be used for implantation, and minimal invasion can be achieved during restoration, reducing the patient's pain. The technical solution of the present invention can achieve painless fixed denture restoration for patients with small bone volume, solve the problem that traditional standard implants do not match the alveolar bone, and avoid the need for bone splitting, bone grafting, maxillary sinus lift, zygomatic and alar transposition due to insufficient bone volume when patients use standard implants for implantation. These surgeries are highly invasive, risky and expensive. The technical solution of the present invention can be applied to patients with full or partial tooth loss and free-end tooth loss, and can achieve immediate implantation, immediate restoration and immediate weight-bearing, shortening the restoration cycle, reducing the difficulty of implantation operation and the risk of restoration failure, and expanding the indications for full-mouth and free-end tooth loss dental implants.

[0030] Second, the technical solution of the present invention uses a retaining connector to connect multiple short implants into a whole, and uses the combined force generated by the whole to enhance the implant's ability to resist occlusal force, increase the initial stability of the implant, achieve immediate implantation and immediate load-bearing, and increase the implant's implantation success rate.

[0031] Third, in the technical solution of the present invention, the upper crown on the restoration base adopts a telescopic crown, and the telescopic crown and the restoration base are also provided with a telescopic crown fastening device 5 to strengthen the fastening of the crown restoration and the implant restoration base, and solve the problem that the simple telescopic crown is prone to loosening after long-term removal and wearing; the technical solution of the present invention can ensure the stability of the crown while facilitating the disassembly of the crown, realizing regular cleaning and maintenance of the implant, and increasing the service life of the implant. In addition, when an implant develops inflammation or other problems, it can also be disassembled to facilitate the treatment of the implant and prevent or reduce the occurrence of peri-implantitis.

[0032] Fourthly, the technical solution of the present invention further provides a double-hole implant guide and a repair abutment guide, which can ensure that each customized implant has a common positioning path, and ensure that each repair abutment has a common positioning path. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The advantages of the above and / or additional aspects of the present invention will become apparent and readily understood from the following description of the embodiments with reference to the accompanying drawings, in which:

[0034] Figure 1 2. It is a schematic structural diagram of a customized removable edentulous immediate-loaded fixed denture according to one embodiment of the present invention, viewed from an oblique upper angle;

[0035] Figure 2 is a schematic structural diagram of a customized removable edentulous immediate-loaded fixed denture according to one embodiment of the present invention, viewed from an oblique downward angle;

[0036] Figure 3 is a front view of a customized removable edentulous immediate loading fixed denture according to one embodiment of the present invention;

[0037] Figure 4 2. It is a schematic structural diagram of a telescopic crown connecting crown fastening device according to an embodiment of the present invention;

[0038] Figure 5 Schematic diagram of the position of the telescopic crown fastening device after installation of a fixed denture according to one embodiment of the present invention.

[0039] Among them, 1-customized implant, 11-first limiting hole, 12-threaded blind hole, 2-retention connector, 21-retention part, 22-connection part, 23-second limiting hole, 24-round hole, 25-first limiting step, 3-restoration abutment, 31-second limiting step, 4-restoration abutment internal screw, 5-sleeve crown and crown fastening device, 51-retention strip, 52-retention nut, 53-retention screw. DETAILED DESCRIPTION

[0040] In order to more clearly understand the above-mentioned objects, features and advantages of the present invention, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that the embodiments of the present invention and the features therein can be combined with each other without conflict.

[0041] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the scope of protection of the present invention is not limited to the specific embodiments disclosed below.

[0042] like Figures 1 to 4 As shown, this embodiment provides a customized removable edentulous immediate load-bearing fixed denture, comprising: a customized implant 1, a retaining connector 2, a restoration abutment 3 and a restoration abutment internal screw 4, wherein the customized implant 1 includes at least four, and the number of the restoration abutment 3 and the restoration abutment internal screw 4 is equal to the number of the customized implants 1.

[0043] The threaded portion at the lower end of the customized implant 1 is set in the alveolar bone, and the upper end is set in the gum. The upper end surface of the customized implant 1 is flush with the gum.

[0044] The retaining connector 2 is a strip-shaped structure, which is horizontally laid above each customized implant 1 along the shape of the jaw. A circular hole is provided on the retaining connector 2 at the position corresponding to the customized implant 1, and the circular hole is used to pass the screw 4 inside the restoration base; the retaining connector 2 is used to connect the implants at each implantation point (including the customized implant 1, the restoration base 3 and the crown) into a whole, so that the connected overall structure generates a combined force, thereby increasing the ability to resist occlusal force.

[0045] The repair base 3 is arranged above the retaining connector 2 and at a position corresponding to the customized implant 1 , and the repair base internal screw 4 passes through the circular hole on the retaining connector 2 to fix the repair base 3 to the customized implant 1 .

[0046] In this embodiment, the customized removable edentulous immediate weight-bearing fixed denture provided is suitable for immediate weight-bearing fixed denture restoration in edentulous patients and patients with free-end missing teeth, and is particularly suitable for fixed denture restoration in edentulous patients with insufficient bone volume; the customized removable edentulous immediate weight-bearing fixed denture is described in detail below.

[0047] The lower end of the customized implant 1 is a cylindrical implant part with threads, which is used to be implanted into a pre-drilled bone hole on the alveolar bone. The upper end of the customized implant 1 is an inverted frustum-shaped gingival penetrating part. The diameter of the upper end face of the gingival penetrating part is larger than the diameter of the lower end face. The frustum structure is set in the gums, and its lower end face is flush with the alveolar bone, and the upper end face is flush with the surface above the gums.

[0048] A first limiting hole 11 is set at the central position of the top of the gingival part, and a threaded blind hole 12 for screwing into the screw 4 in the repair base is opened at the center of the lower surface of the first limiting hole 11. The lower end of the threaded blind hole 12 extends to the junction of the implant part and the gingival part.

[0049] It should be noted that due to the insufficient alveolar bone volume of edentulous patients, when designing implants, they are usually designed to be smaller and shorter structures. Due to shape limitations, the implants are usually unable or difficult to form a fixed connection with the restoration base. In order to solve this problem, in the present invention, the transgingival part of the upper end of the customized implant 1 is set to an inverted truncated cone structure. The inverted truncated cone structure can fully expand the diameter of the transgingival part while meeting the implantation requirements under the condition of bone volume. A blind hole is provided in the transgingival part for screwing into the screw 4 in the restoration base. The space in the transgingival part is utilized to realize the connection and fixation requirements of the restoration base 3 and the customized implant 1, which solves the problem that the connection and fixation between the restoration base and the implant cannot or is difficult to achieve due to the implant being too thin.

[0050] The retaining connector 2 includes a retaining portion 21 and a connecting portion 22 .

[0051] The retaining portion 21 is a circular structure with a diameter identical to that of the upper end face of the transgingival portion. The retaining portion 21 is positioned directly above the customized implant 1 and is located at the gingival level. A second limiting hole 23 is provided at the center of the retaining portion 21. A circular hole 24 for passing the internal screw 4 of the restoration base is provided at the center of the lower surface of the second limiting hole 23. The position of the circular hole 24 corresponds to the position of the threaded blind hole 12 at the center of the transgingival portion. A first limiting step 25 is provided below the retaining portion 21. The shape of the first limiting step 25 matches the shape of the first limiting hole 11. The first limiting step 25 is used to sink into the first limiting hole 11 when the retaining connector 2 is installed.

[0052] In this embodiment, the first limiting step 25 and the first limiting hole 11 are connected to limit the retaining connector 2 as a whole through a matching connection to prevent it from being dislocated and to avoid affecting the restorative function of the entire fixed denture; specifically, a plurality of retaining parts 21 equal in number to the customized implant 1 are provided on the retaining connector 2, and a first limiting step 25 is provided under each retaining part 21. When the retaining connector 2 is installed, the plurality of first limiting steps 25 are simultaneously sunk into the first limiting holes 11 at the corresponding positions to limit the retaining connector 2 as a whole.

[0053] The connecting portion 22 is positioned between two adjacent retaining portions 21, connecting the multiple retaining portions 21 into a single unit. The overall shape of the retaining connector 2 matches the shape of the corresponding jaw. The contact surface between the connecting portion 22 and the mucosa is designed for static pressure conforming to the mucosal morphology. The connecting portion 22 is 1 mm thick or greater and slightly narrower than the diameter of the upper end of the gingival portion.

[0054] In this embodiment, static pressure design refers to the ability of the connecting portion 22 to apply a slight, sustained pressure to the gums when in contact with the gingival mucosa (i.e., not occluded or moving). This pressure gently compresses the mucosa, but does not overpress it to the point of causing gingival ischemia, necrosis, or discomfort. The purpose of static pressure design is to ensure a tight fit between the connecting portion 22 and the mucosa, creating a good seal and reducing the ingress of bacteria and food debris. Furthermore, appropriate static pressure promotes adaptability between the mucosa and the denture base, further stabilizing the prosthesis and preventing loose contact between the connecting portion 22 and the mucosa, which could result in shaking or mucosal irritation.

[0055] The repair base 3 is arranged directly above the retaining part 21. It is a columnar structure. A through hole for installing the screw 4 inside the repair base is provided at the internal center position. The position of the through hole corresponds to the position of the circular hole 24 at the center of the retaining part 21; a second limiting step 31 is provided at the lower end of the repair base 3. The shape of the second limiting step 31 matches the shape of the second limiting hole 23. The second limiting step 31 is used to sink into the second limiting hole 23 when installing the repair base 3 to limit the repair base 3 and prevent it from moving.

[0056] The lower end of the screw 4 in the repair base is a threaded end. When fixing the repair base 3 and the retaining connector 2, the threaded end of the screw 4 in the repair base passes through the through hole inside the repair base 3 and the circular hole 24 at the center of the retaining part 21 in sequence and is screwed into the threaded blind hole 12 at the upper end of the customized implant 1, connecting the customized implant 1, the retaining connector 2 and the repair base 3 into a whole.

[0057] The customized removable edentulous immediate loading fixed denture also includes a crown. The crown is a telescopic crown with a sleeve set in the crown.

[0058] In this embodiment, the crown portion above the restoration base 3 is restored with a telescopic crown and a crown-linked crown. Since pure titanium cannot be baked into porcelain, a pure titanium disk can be used to cut into a telescopic crown and a crown-linked crown bracket, and then a resin tooth is made as the final restoration.

[0059] like Figure 5 As shown, a telescopic crown fastening device 5 is provided on the restoration base 3, and the telescopic crown fastening device 5 is used to fasten the telescopic crown installed on the restoration base 3 to prevent it from falling off.

[0060] The sleeve crown and crown fastening device 5 is located at the left and right 4 and 5 tooth position connectors of the overall crown, and includes a retaining clip 51, a retaining nut 52 and a retaining screw 53. The retaining clip 51 is fixedly connected to the retaining nut 52. The retaining clip 51 is laterally arranged on the lingual side of the adjacent restoration abutment 3 and is tightly connected to the lingual side of the restoration abutment 3. The retaining nut 52 is located in the crown sleeve between the adjacent restoration abutments 3, and the entrance faces the labial side. Retention holes are set on the labial side of the crown between the adjacent restoration abutments 3. The retaining screw 53 passes through the retaining hole from the labial side of the crown and is threadedly connected to the retaining nut 52 to fasten the crown to the restoration abutment 3; a gap is reserved at the position corresponding to the inner side of the crown and the sleeve crown and crown fastening device 5, so that the crown can be smoothly installed on the restoration abutment 3.

[0061] In this embodiment, the retaining clip 51 is similar to a strip cut from the lingual side of the telescopic crown. The fastening action of the retaining clip 51 and the retaining screw 53 prevents the telescopic crown from falling off. When the customized implant 1 and the restorative abutment 3 need to be cleaned or repaired, the retaining screw 53 can be unscrewed, the crown can be disassembled, and the cleaning process can be carried out.

[0062] The customized removable edentulous immediate load-bearing fixed denture in this embodiment can be manufactured using modern CBCT imaging technology, oral scanning technology, 3D design modeling software, 3D printing technology, metal carving technology and traditional dental implant production technology, and finally the completed fixed denture is implanted in the oral cavity.

[0063] The present invention also provides a method for manufacturing a customized removable edentulous immediate load fixed denture, comprising:

[0064] S1: Take CBCT images of the patient's oral cavity to obtain three-dimensional image data of the alveolar bone and surrounding gums. Scan the patient's oral cavity with a 3D scanning head to obtain scanning data of the three-dimensional morphology of the gum surface and the vertical distance occlusal relationship.

[0065] In this embodiment, the three-dimensional imaging data of the alveolar bone and surrounding gums include the overall shape of the alveolar bone, bone height, bone width, shape and distribution of the gums around the alveolar bone, etc., which can be used for bone volume assessment to determine the site where the implant can be implanted; the three-dimensional morphological data of the gum surface includes the mucosal (gum) contour and gum height data, which can be used for the design of the contact between the repair base and the soft tissue, and the vertical distance occlusal relationship data can be used for crown height design and auxiliary registration of the occlusal position.

[0066] S2: Use modeling software to overlap the image data and scan data, and determine the alveolar bone volume and mucosal thickness (mucosal thickness is the gingival thickness in the vertical direction) based on the overlapped image data. The alveolar bone volume includes the alveolar bone width (i.e. the mesiodistal and buccolingual width of the alveolar bone) and height.

[0067] In this embodiment, 3Shape or other professional software can be used to overlap the above-mentioned image data and scan data. For example, when using 3Shape, the CBCT image data and scan data are imported into the 3Shape software for data overlap. The software is used to accurately extract the morphological and dimensional data of the alveolar bone and gums, and visualize the internal structure of the alveolar bone and the surface contour of the gum soft tissue to assist in the subsequent production of implants and guides.

[0068] S3: Based on the alveolar bone volume and mucosal thickness, the number, position and specifications of the customized implants 1 are determined and manufactured.

[0069] Positions in the maxillary bone volume that meet implant requirements are marked as initial sites. The number of these initial sites is greater than or equal to the number of basic implants (4 or 6). The implant requirements are that the alveolar bone width is greater than 4 mm (the mesiodistal and buccal-lingual widths of the alveolar bone are both greater than 4 mm) and the alveolar bone height is greater than 4 mm. Sites greater than 4 in the initial sites are selected as implant sites for customized implants 1, and the number and position of customized implants 1 are obtained. The height of the upper gingival portion of the customized implant 1 is set according to the thickness of the mucosa so that the upper end surface of the gingival portion is flush with the upper surface of the mucosa.

[0070] Preferably, the number of customized implants 1 can be determined based on the bone integration area of a single customized implant 1 and the size of the bite force. The number of customized implants 1 on one side of the mouth is equal to the ratio of the total bite force (i.e., the bite force on the left or right side of the mouth, about 800N) to the bite force that a single implant can withstand. The bite force that a single implant can withstand is equal to the bone integration area of a single customized implant 1 and the bearing capacity of each square millimeter of alveolar bone (about 3 to 5N / mm 2 ), wherein the bone integration area of a single customized implant 1 is equal to the product of the side area of the implant part and the surface morphology coefficient (about 1.5 to 2.5).

[0071] In this embodiment, the customized implant 1 can be modeled in the software according to the acquired quantity, position and specification data (including the size of the implant part and the height of the gingival part. For the size of the implant part, the appropriate specification can be selected from the pre-set specifications, such as the implant part size is large when the bone volume is large). A first limiting hole 11 and a threaded blind hole 12 are also set in the model of the customized implant 1. After modeling, 3D printing is performed according to the model data.

[0072] S4: According to the number and position of the customized implants 1, a retaining connector with a matching shape is provided, and a corresponding number of restoration abutments 3 and restoration abutment internal screws 4 are provided.

[0073] In this embodiment, the retaining connector 2 includes a retaining part 21 and a connecting part 22. The retaining part 21 is a circular structure with a diameter the same as the diameter of the gingival part. A second limiting hole 23 and a circular hole 24 are provided at the central position of the retaining part 21, and a first limiting step 25 is provided at the lower end; the connecting part 22 is provided between two adjacent retaining parts 21, connecting multiple retaining parts 21 into a whole, with a thickness greater than or equal to 1 mm, and a width slightly narrower than the diameter of the upper end face of the gingival part.

[0074] S5: The crown height is determined based on the vertical distance occlusal relationship data and is manufactured. The telescopic crown fastening device 5 is set at the 4th and 5th tooth positions selected in the overall crown.

[0075] In this embodiment, the portion of the crown mounted on the restoration base 3 is made into a telescopic crown. Since porcelain cannot be baked to pure titanium, a pure titanium disk can be used to cut into a telescopic crown bracket and then a resin tooth is made as the final crown.

[0076] Select the left and right 4th and 5th teeth in the overall crown, set a retention hole on the labial side of the crown between the selected teeth, so that the retention nut 52 can pass through the retention hole from the labial side and be fixedly connected to the retention nut 52, and set a gap corresponding to the position of the retention strip 51 in the sleeve of the crown.

[0077] S6: A double-layer hole implant guide is set based on the number, position and specifications of the customized implants 1, wherein small implant holes are set on one layer for drilling bones to ensure the position of the implants, and large implant holes are set on the other layer for implanting the customized implants 1 to ensure that each customized implant 1 has a common positioning path. A restoration abutment guide is set based on the specifications of the restoration abutment 3 to ensure that each restoration abutment 3 has a common positioning path.

[0078] Based on the visualization of the internal structure of the alveolar bone and the surface contour of the gingival soft tissue, a double-layer hole implant guide is set up, and small implant holes are set on one layer of the implant guide according to the number and position of the customized implants 1, and large implant holes are set on the other layer of the implant guide according to the position and specifications of the customized implants 1; based on the visualization of the internal structure of the alveolar bone and the surface contour of the gingival soft tissue, a restoration abutment guide is set up, and mounting holes are set on the restoration abutment guide according to the position and specifications of the restoration abutment 3.

[0079] In this embodiment, it is ensured that the implant and the restoration abutment have a common positioning path, that is, when the restoration abutment 3 and the crown are installed on multiple customized implants 1, the direction is consistent, and each restoration abutment 3 and the sleeve crown can be worn smoothly at the same time without jamming, deflection or stress interference.

[0080] In this embodiment, after the customized removable edentulous immediate load-bearing fixed denture is completed, it is implanted by the physician. The implantation process is as follows:

[0081] Place the double-layer hole implant guide on the tooth jaw that needs to be repaired, drill bone holes in sequence according to the small implant holes on the guide, remove the single-layer guide with small implant holes, and implant each root-type implant 1 into the bone hole in sequence according to the large implant holes on the other layer of guide to ensure that each customized implant 1 has a common positioning path, and remove the single-layer guide with large implant holes.

[0082] The retaining connector 2 is set above each customized implant 1 along the shape of the jaw, and then the restoration base guide is set on the jaw that needs to be repaired. Each restoration base 3 is installed in sequence according to the position of the mounting hole on the restoration base guide, so that the second limiting step 31 at the lower end is sunk into the second limiting hole 23 of the retaining connector 2, ensuring that each restoration base 3 has a common positioning path, and the restoration base internal screw 4 is passed through the internal through hole of the restoration base 3 and the circular hole 24 at the center of the retaining part 21 in sequence, and screwed into the threaded blind hole 12 at the upper end of the customized implant 1, and the customized implant 1, the retaining connector 2 and the restoration base 3 are connected as a whole. The restoration base guide is removed so that the whole can generate a combined force, enhance the ability to resist occlusal force, and increase the initial stability of the implant.

[0083] Select the left and right 4 and 5 tooth positions selected in the overall crown, and set the sleeve crown fastening device 5 at the selected tooth position. Specifically, set a retention hole on the labial side of the crown between adjacent restoration abutments 3, and place the retention clip 51 horizontally and tightly against the lingual side of the adjacent restoration abutment 3. Pass the retention screw 53 through the retention hole from the labial side and fix it with the retention nut 52, so that the crown is fastened to the restoration abutment 3, completing the restoration process.

[0084] In the present invention, terms such as "installed," "connected," "connected," and "fixed" should be understood broadly. For example, "connected" may refer to a fixed connection, a detachable connection, or an integral connection; and "connected" may refer to a direct connection or an indirect connection via an intermediary. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0085] The shapes of the various components in the drawings are schematic, and certain differences from their actual shapes are not excluded. The drawings are only used to illustrate the principles of the present invention and are not intended to limit the present invention.

[0086] Although the present invention has been disclosed in detail with reference to the accompanying drawings, it should be understood that these descriptions are merely illustrative and are not intended to limit the application of the present invention. The scope of the present invention is defined by the appended claims and includes various modifications, variations, and equivalents made to the invention without departing from the scope and spirit of the present invention.

Claims

1. A customized removable immediate load-bearing fixed denture for edentulous jaws, characterized in that: The customized removable edentulous jaw immediate load-bearing fixed denture comprises: a customized implant (1), a retaining connector (2), a restoration base (3) and a restoration base internal screw (4), wherein the customized implant (1) comprises at least four; The threaded portion of the lower end of the customized implant (1) is arranged in the alveolar bone, and the upper end is arranged in the gums, and the upper end surface of the customized implant (1) is flush with the gums; The retaining connector (2) is a strip-shaped structure, which is horizontally laid above each customized implant (1) along the shape of the jaw. A circular hole is provided on the retaining connector (2) at a position corresponding to the customized implant (1), and the circular hole is used to pass the screw (4) in the repair base. The retaining connector (2) is used to connect the implants at each implantation point into a whole. The repair base (3) is arranged above the retaining connector (2) and at a position corresponding to the customized implant (1), and the screw (4) inside the repair base passes through the circular hole on the retaining connector (2) to fix the repair base (3) and the customized implant (1).

2. The customized removable edentulous immediate load fixed denture according to claim 1, characterized in that: The lower end of the customized implant (1) is an implant portion with a thread, and the implant portion is used to be implanted into a bone hole pre-drilled on the alveolar bone. The upper end of the customized implant (1) is an inverted frustum-shaped gingival penetrating portion, and the upper end surface of the gingival penetrating portion is flush with the surface above the gum.

3. The customized removable edentulous immediate load fixed denture according to claim 2, characterized in that: A first limiting hole (11) is provided at the top center of the transgingival part, and a threaded blind hole (12) for screwing in a screw (4) in the repair base is provided at the center of the lower surface of the first limiting hole (11), and the lower end of the threaded blind hole (12) extends to the junction of the implant part and the transgingival part.

4. The customized removable immediate load-bearing fixed denture for edentulous jaw according to claim 3, characterized in that: The retaining connector (2) comprises a retaining portion (21) and a connecting portion (22); The retaining portion (21) is arranged directly above the customized implant (1), and its diameter is the same as the diameter of the upper end surface of the gingival portion. The connecting portion (22) is arranged between two adjacent retaining portions (21) and is used to connect the multiple retaining portions (21) into a whole. The overall shape of the retaining connector (2) matches the shape of the corresponding jaw.

5. The customized removable edentulous immediate load fixed denture according to claim 4, characterized in that: A second limiting hole (23) is provided at the central position of the retaining portion (21), and a circular hole (24) for passing the screw (4) in the repair base is provided at the center of the lower surface of the second limiting hole (23). The position of the circular hole (24) corresponds to the position of the threaded blind hole (12). A first limiting step (25) is provided below the retaining portion (21), and the first limiting step (25) is used to sink into the first limiting hole (11) when the retaining connector (2) is installed; the contact surface between the connecting portion (22) and the mucosa is a static pressure design that matches the mucosal morphology.

6. The customized removable immediate load-bearing fixed denture for edentulous jaw according to claim 4, characterized in that: The repair base (3) is arranged directly above the retaining portion (21), and a through hole for installing a screw (4) inside the repair base is provided at its inner center position, and the position of the through hole corresponds to the position of the circular hole (24) at the center of the retaining portion (21).

7. The customized removable immediate load-bearing fixed denture for edentulous jaw according to claim 4, characterized in that: A second limiting step (31) is provided at the lower end of the repair base (3), and the second limiting step (31) is used to sink into the second limiting hole (23) when the repair base (3) is installed.

8. The customized removable immediate-loaded fixed denture for edentulous jaws according to claim 1, wherein: The customized removable edentulous immediate load fixed denture further comprises a crown and a telescopic crown fastening device (5); The dental crown adopts a telescopic crown, and the telescopic crown fastening device (5) is used to fasten the telescopic crown installed on the restoration base (3), which includes a retaining clip (51), a retaining nut (52) and a retaining screw (53). The retaining clip (51) is fixedly connected to the retaining nut (52). The retaining clip (51) is horizontally arranged on the lingual side of the restoration base (3), and a retaining hole is arranged on the labial side of the crown between adjacent restoration bases (3). The retaining screw (53) penetrates the retaining hole from the labial side and is connected to the retaining nut (52), so that the dental crown is fastened to the restoration base (3).

9. A method for manufacturing a customized removable immediate-loaded fixed denture for edentulous jaws as claimed in any one of claims 1 to 8, characterized in that: The method comprises: S1: Take CBCT images of the patient's oral cavity to obtain three-dimensional image data of the alveolar bone and surrounding gums. Scan the patient's oral cavity with a 3D scanning head to obtain scanning data of the three-dimensional morphology of the gum surface and the vertical distance and occlusal relationship; S2: Use modeling software to overlay the image data and scan data, and determine the alveolar bone volume and mucosal thickness based on the overlay image data. The alveolar bone volume includes the width and height of the alveolar bone. S3: Based on the alveolar bone volume and mucosal thickness, determine the number, position and specifications of customized implants (1) and make them; S4: according to the number and position of the customized implants (1), a retaining connector with a matching shape is provided, and a corresponding number of restoration abutments (3) and restoration abutment internal screws (4) are provided; S5: Determine the crown height based on the vertical distance occlusal relationship data and make it, and set the telescopic crown fastening device (5) on the 4th and 5th tooth positions selected in the overall crown; S6: A double-layer hole implant guide is set based on the number, position and specifications of the customized implants (1), wherein one layer is provided with small implant holes for drilling bone holes, and the other layer is provided with large implant holes for implanting the customized implants (1). A restoration abutment guide is set based on the specifications of the restoration abutment (3).

10. The customized removable immediate load fixed denture for edentulous jaw according to claim 1, characterized in that: The S3 specifically includes: The position where the amount of bone on the maxillary bone meets the implantation conditions is marked as the initial site. The implantation conditions are that the alveolar bone width is greater than 4 mm and the alveolar bone height is greater than 4 mm. More than 4 sites are selected from the initial sites as the implantation sites of the customized implant (1) to obtain the number and position of the customized implant (1). The height of the upper end of the customized implant (1) through the gingival part is set according to the thickness of the mucosa so that the upper end surface of the through the gingival part is flush with the upper surface of the mucosa.

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