Customized detachable edentulous immediate load-bearing fixed false tooth

Abstract

The utility model discloses a customized detachable edentulous immediate load-bearing fixed denture, and relates to the technical field of human oral medicines.The fixed denture 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; according to the technical scheme, the implant tooth is suitable for patients with full-mouth or half-mouth tooth loss and free-end tooth loss, immediate implantation, immediate repair and immediate load bearing can be achieved, the repair period is shortened, the difficulty of implantation operation and the risk of repair failure are reduced, and the indications of full-mouth or free-end tooth loss of the implant tooth are expanded.

Description

Technical Field

[0001] This utility model relates to the technical field of human oral medicine, and more specifically, to a custom-made, detachable, edentulous, immediately loading fixed denture. Background Technology

[0002] With the advancements in dental implant technology, oral imaging technology, and related computer software technology, many edentulous patients are choosing full-mouth dental implant restorations to replace their original full-mouth removable dentures. Full-mouth dental implant restorations are a type of fixed dental prosthesis, which do not require cleaning after meals or repeated removal and insertion. Their comfort, aesthetics, and chewing function are comparable to natural teeth, making them highly popular among 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: a width of more than 6mm in the mesial and distal and buccal-lingual directions of the alveolar bone, and a height of more than 10mm. In addition, a minimum of 4 implants are required to complete the fixed restoration of the full mouth edentulous jaw.

[0004] However, ideal edentulous patients with sufficient alveolar bone volume for implantation are rare. In reality, edentulous patients often experience alveolar bone narrowing and flatness due to congenital or acquired causes after complete tooth loss, resulting in insufficient bone volume. Traditional removable dentures, with their low and narrow alveolar bone, cannot provide sufficient suction, causing them to fall out during use and preventing chewing. Furthermore, the discomfort and difficulty in removing and inserting dentures after meals contribute to low patient satisfaction. Traditional implant-supported dentures, on the other hand, are not available in sufficient bone volume. In such cases, bone grafting is necessary to increase bone volume, which is not only painful and invasive but also expensive and time-consuming, requiring a year or even longer to complete the final restoration. This extended waiting period exacerbates the suffering caused by prolonged tooth loss and the inability to eat. For patients whose bone volume meets the implant requirements, after completing a partial fixed restoration based on 4 or 6 implants, the inability to regularly disassemble the crowns for cleaning and maintenance of the implants can lead to peri-implantitis, resulting in implant failure and ultimately, failure of the full fixed restoration. Utility Model Content

[0005] The purpose of this invention is to provide a custom-designed, detachable, immediately loading fixed denture for edentulous patients, which solves the problems of existing technologies such as the inability to implant implants when patients have insufficient bone volume, long restoration cycles, and the inability to disassemble for cleaning and maintenance.

[0006] The technical solution of this utility model is: to provide a custom-made detachable edentulous immediate loading fixed denture, which includes: custom-made implants, retention connectors, and restorative abutments, wherein the custom-made implants include at least four.

[0007] The threaded portion of the custom-made implant is placed in the alveolar bone, and the upper end is placed in the gum. The upper surface of the custom-made implant is flush with the gum.

[0008] The retention connector is a strip-shaped structure that is laid horizontally above each custom-made implant along the shape of the jaw. The restorative abutment is placed above the retention connector and at the position corresponding to the custom-made implant. The fixed custom-made implant and the restorative abutment form an independent implant. The retention connector is used to connect the implants at each implantation point into a whole.

[0009] Furthermore, the custom-made removable edentulous immediate loading fixed denture also includes screws inside the restorative abutment;

[0010] Holes for installing the repair abutment screws are provided on the fixation connector at positions corresponding to the custom implants. The repair abutment screws pass through the holes on the fixation connector to fix the repair abutment to the custom implants.

[0011] Furthermore, the lower end of the custom-made implant is a threaded implantation section, which is used to be implanted into a pre-drilled cavity in the alveolar bone. The upper end of the custom-made implant is an inverted frustum-shaped transgingival section, the upper surface of which is flush with the surface above the gingiva.

[0012] Furthermore, a first limiting hole is provided at the top center of the perforated portion, and a threaded blind hole for screwing in the inner screw of the prosthetic abutment is opened at the center of the lower surface of the first limiting hole, and the lower end of the threaded blind hole extends to the junction of the implanted portion and the perforated portion.

[0013] Furthermore, the retaining connector includes a retaining portion and a connecting portion;

[0014] The retention portion is positioned directly above the custom-made implant, and its diameter is the same as the diameter of the upper end face of the transgingival portion. The connecting portion is positioned between two adjacent retention portions to connect multiple retention portions into a whole. The overall shape of the retention connector matches the shape of the corresponding tooth jaw.

[0015] Furthermore, a second limiting hole is provided at the center of the retaining part, and a circular hole for the screw inside the repair base to pass through is opened 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. The first limiting step is used to sink into the first limiting hole when the retaining connector is installed. The contact surface between the connecting part and the mucosa is designed with static pressure to match the shape of the mucosa.

[0016] Furthermore, the repair base is positioned directly above the retaining part, and a through hole for installing the screw inside the repair base is provided at its internal center position. The position of the through hole corresponds to the position of the circular hole at the center of the retaining part.

[0017] Furthermore, a second limiting step is provided at the lower end of the repair base, which is used to sink into the second limiting hole when the repair base is installed.

[0018] Furthermore, the custom-made detachable edentulous immediate loading fixed denture also includes a crown and a sleeve crown fastening device;

[0019] The crown uses a sleeve crown connector. The sleeve crown connector fastening device is used to fasten the sleeve crown connector to the restoration abutment by connecting it from the lingual side of the restoration abutment and the labial side of the crown respectively using clips and screws.

[0020] The beneficial effects of this utility model are:

[0021] First, the technical solution in this application allows for implant customization based on the bone volume and mucosal distribution at the alveolar bone implantation site. Based on the alveolar bone volume and mucosal thickness, the number, location, and specifications of the customized implants are determined. This enables the use of short implants, as described in this application, even in patients with limited bone volume, achieving minimally invasive restoration and reducing patient discomfort. The technical solution in this application allows for painless fixed prosthetic restoration for patients with small bone volumes, solving the problem of traditional standard implants not matching the alveolar bone. It avoids the need for highly invasive, high-risk, and costly surgeries such as bone splitting, bone grafting, maxillary sinus lift, and zygomatic and pterygoid procedures when using standard implants due to insufficient bone volume. The technical solution in this application is applicable to patients with complete or partial edentulism and free-end edentulism, enabling immediate implantation, immediate restoration, and immediate loading. This shortens the restoration cycle, reduces the difficulty of the implantation procedure and the risk of restoration failure, and expands the indications for complete and free-end edentulism implants.

[0022] Secondly, the technical solution in this application uses a fixation connector to connect multiple short implants into a whole. The combined force generated by this whole enhances the implant's ability to resist biting force, increases the initial stability of the implant, realizes immediate planting and immediate load-bearing, and increases the success rate of implant planting.

[0023] Third, in the technical solution of this application, the upper crown of the restorative abutment adopts a telescopic crown connection, and the telescopic crown connection and the restorative abutment are also provided with a telescopic crown connection fastening device to strengthen the fastness of the crown connection restoration and the implant restoration abutment, solving the problem of loosening that is easy to occur with long-term removal and insertion of simple telescopic crown connection. The technical solution of this application can ensure the stability of the crown while facilitating the disassembly of the crown, realizing the regular cleaning and maintenance of the implant, 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. Attached Figure Description

[0024] The advantages of the above and / or additional aspects of this utility model will become apparent and readily understood in the description of the embodiments taken in conjunction with the following drawings, wherein:

[0025] Figure 1 This is a schematic diagram of a custom-made, removable, edentulous, immediately loading fixed denture according to an embodiment of this application, viewed from an obliquely upward angle.

[0026] Figure 2 This is a schematic diagram of a customized, removable, edentulous, immediately loading fixed denture according to an embodiment of this application, viewed from a downward angle.

[0027] Figure 3 This is a front view of a custom-made, removable, edentulous, immediately loading fixed denture according to an embodiment of this application;

[0028] Figure 4 This is a schematic diagram of the structure of a sleeve crown fastening device according to an embodiment of this application;

[0029] Figure 5 This is a schematic diagram showing the location of the crown fastening device after installation of a fixed denture according to an embodiment of this application.

[0030] Among them, 1-customized implant, 11-first limiting hole, 12-threaded blind hole, 2-fixing connector, 21-fixing part, 22-connecting part, 23-second limiting hole, 24-round hole, 25-first limiting step, 3-repair abutment, 31-second limiting step, 4-repair abutment inner screw, 5-sleeve crown fastening device, 51-fixing clip, 52-fixing nut, 53-fixing screw. Detailed Implementation

[0031] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, unless otherwise specified, the embodiments of this utility model and the features thereof can be combined with each other.

[0032] In the following description, many specific details are set forth in order to provide 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.

[0033] like Figures 1 to 4 As shown, this embodiment provides a custom-made removable edentulous immediate loading fixed denture, which includes: a custom-made implant 1, a retention connector 2, a prosthesis abutment 3, and abutment screws 4. The custom-made implant 1 includes at least four implants, and the number of prosthesis abutments 3 and abutment screws 4 is equal to the number of custom-made implants 1.

[0034] The threaded portion of the custom implant 1 is placed in the alveolar bone, and the upper end is placed in the gingiva. The upper surface of the custom implant 1 is flush with the gingiva.

[0035] The retention connector 2 is a strip-shaped structure that is laid horizontally above each custom-made implant 1 along the shape of the jaw. The retention connector 2 has a round hole at the position corresponding to the custom-made implant 1. The round hole is used to pass through the screw 4 inside the restorative abutment. The retention connector 2 is used to connect the implants (including the custom-made implant 1, the restorative abutment 3 and the crown) at each implantation point into a whole, so that the connected whole structure generates a combined force and increases the ability to resist occlusal forces.

[0036] The repair abutment 3 is positioned above the fixation connector 2 and at a position corresponding to the custom implant 1. The screw 4 inside the repair abutment passes through the round hole on the fixation connector 2 to fix the repair abutment 3 to the custom implant 1.

[0037] In this embodiment, the provided custom-made detachable edentulous immediate loading fixed denture is suitable for immediate loading fixed denture restoration for edentulous patients and patients with free-end missing teeth, and is especially suitable for fixed denture restoration for edentulous patients with insufficient bone volume; the following is a detailed description of the custom-made detachable edentulous immediate loading fixed denture.

[0038] The lower end of the custom implant 1 is a threaded cylindrical implantation part, which is used to be implanted into a pre-drilled cavity in the alveolar bone. The upper end of the custom implant 1 is an inverted frustum-shaped transgingival part, the diameter of the upper end face of the transgingival part is larger than the diameter of the lower end face. This frustum structure is placed in the gingiva, with its lower end face flush with the alveolar bone and its upper end face flush with the surface above the gingiva.

[0039] A first limiting hole 11 is provided at the center of the top of the perforated portion. A threaded blind hole 12 for screwing in the screw 4 of the repair abutment is provided 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 implanted portion and the perforated portion.

[0040] It should be noted that, due to insufficient alveolar bone volume in edentulous patients, implants are typically designed with a narrow and short structure. Due to shape limitations, implants often cannot or are difficult to fix to the abutment. To address this issue, this application sets the transgingival portion of the custom implant 1 as an inverted frustum shape. This inverted frustum shape can significantly increase the diameter of the transgingival portion while meeting the implantation requirements given sufficient bone volume. Blind holes for screwing in the screw 4 of the abutment are provided in the transgingival portion. The space in the transgingival portion is used to achieve the connection and fixation between the abutment 3 and the custom implant 1, thus solving the problem that the connection and fixation between the abutment and implant cannot or is difficult to achieve due to the implant being too thin.

[0041] The retaining connector 2 includes a retaining portion 21 and a connecting portion 22.

[0042] The retention portion 21 is circular, with a diameter identical to that of the upper end face of the transgingival portion. The retention portion 21 is positioned directly above the custom-made implant 1 at the gingival level. A second limiting hole 23 is located at the center of the retention portion 21. A circular hole 24 for the screw 4 inside the prosthesis abutment is formed at the center of the lower surface of the second limiting hole 23. The position of this 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 located below the retention 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 during the installation of the retention connector 2.

[0043] In this embodiment, the first limiting step 25 and the first limiting hole 11 are connected in a cooperative manner to limit the overall positioning of the retaining connector 2, preventing misalignment and avoiding affecting the restorative function of the entire fixed denture. Specifically, the retaining connector 2 is provided with multiple retaining parts 21 equal in number to the custom implant 1. Each retaining part 21 is provided with a first limiting step 25 below it. When the retaining connector 2 is installed, the multiple first limiting steps 25 simultaneously sink into the first limiting hole 11 at the corresponding position to limit the overall positioning of the retaining connector 2.

[0044] The connecting portion 22 is disposed between two adjacent retention portions 21 to connect multiple retention portions 21 into a whole. The overall shape of the retention connector 2 matches the shape of the corresponding tooth jaw. The contact surface between the connecting portion 22 and the mucosa is designed with static pressure to conform to the mucosa morphology. The thickness of the connecting portion 22 is greater than or equal to 1 mm, and its width is slightly narrower than the diameter of the upper end face of the transgingival portion.

[0045] In this embodiment, the static pressure design refers to the ability of the connecting portion 22 to apply a small and sustained pressure to the gingiva when in contact with the gingival mucosa in a static state (i.e., without biting or moving). This pressure gently compresses the mucosa without causing excessive pressure that could lead to gingival ischemia, necrosis, or discomfort. The purpose of the static pressure design is to ensure a tight fit between the connecting portion 22 and the mucosa, forming a good seal to reduce the entry of bacteria and food debris underneath. At the same time, appropriate static pressure can promote the adaptation of the mucosa to the base of the denture, making the restoration more stable and preventing the connecting portion 22 from shifting or causing mucosal irritation due to loose contact between the connecting portion 22 and the mucosa.

[0046] The repair base 3 is positioned directly above the retaining part 21. It is a columnar structure with a through hole at its center for installing the screw 4 inside the repair base. The position of this 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 the repair base 3 is installed to limit the repair base 3 and prevent it from moving.

[0047] The lower end of the screw 4 inside the repair base is threaded. When fixing the repair base 3 and the fixation connector 2, the threaded end of the screw 4 inside the repair base passes through the through hole inside the repair base 3 and the round hole 24 at the center of the fixation part 21 in sequence and is screwed into the threaded blind hole 12 at the upper end of the custom implant 1, connecting the custom implant 1, the fixation connector 2 and the repair base 3 into a whole.

[0048] Custom-made, detachable, edentulous, immediate loading fixed dentures also include crowns, which are made of sleeve crowns with a sleeve inside the crown.

[0049] In this embodiment, the crown portion above the abutment 3 is restored with a telescopic crown. Since pure titanium cannot be porcelain-fused to, a pure titanium disc can be cut into a telescopic crown framework and then resin teeth can be used as the final restoration.

[0050] like Figure 5 As shown, a sleeve crown fastening device 5 is provided on the repair base 3. The sleeve crown fastening device 5 is used to fasten the sleeve crown installed on the repair base 3 to prevent it from falling off.

[0051] The sleeve crown fastening device 5 is located at the left and right 4th and 5th tooth positions of the integral crown. It includes a retention strip 51, a retention nut 52, and a retention screw 53. The retention strip 51 is fixedly connected to the retention nut 52. The retention strip 51 is laterally positioned on the lingual side of the adjacent restorative abutment 3 and is in close contact with the lingual side of the restorative abutment 3. The retention nut 52 is located in the crown sleeve between the adjacent restorative abutments 3, with the entrance facing the labial side. A retention hole is provided on the labial side of the crown between the adjacent restorative abutments 3. The retention screw 53 passes through the retention hole from the labial side of the crown and is threadedly connected to the retention nut 52 to fasten the crown to the restorative abutment 3. A gap is reserved on the inner side of the crown corresponding to the position of the sleeve crown fastening device 5 so that the crown can be smoothly installed on the restorative abutment 3.

[0052] In this embodiment, the retention strip 51 is equivalent to a long strip cut from the lingual side of the sleeve crown. The retention strip 51 and the retention screw 53 fasten together to prevent the sleeve crown from falling off. When it is necessary to clean or repair the custom implant 1 and the restorative abutment 3, the retention screw 53 can be unscrewed to remove the crown and carry out the cleaning process.

[0053] The customized, detachable, edentulous, immediately loading fixed prosthesis in this embodiment can be manufactured using modern CBCT imaging technology, oral scanning technology, 3D design and modeling software, 3D printing technology, metal engraving technology, and traditional dental implant manufacturing techniques. Finally, the completed fixed prosthesis is implanted into the oral cavity.

[0054] This application also provides a method for fabricating a custom-made, removable, immediately loading fixed denture for edentulous individuals, including:

[0055] S1: Take CBCT images of the patient's oral cavity to obtain three-dimensional image data of the alveolar bone and surrounding gingiva. Scan the patient's oral cavity with a 3D scanning head to obtain scanning data of the three-dimensional morphology of the gingival surface and the vertical distance occlusal relationship.

[0056] In this embodiment, the three-dimensional image data of the alveolar bone and surrounding gingiva includes the overall shape of the alveolar bone, bone height, bone width, and the shape and distribution of the gingiva surrounding the alveolar bone. This data can be used for bone volume assessment to determine the sites where implants can be placed. The three-dimensional morphological data of the gingival surface includes the mucosal (gingival) contour and gingival height data, which can be used for the design of the contact between the abutment and soft tissue. The vertical distance occlusal relationship data can be used for crown height design and to assist in the registration of occlusal positions.

[0057] S2: Use modeling software to overlay the image data and scan data, and determine the alveolar bone volume and mucosal thickness (mucosal thickness is the vertical gingival thickness) based on the overlaid image data. The alveolar bone volume includes the alveolar bone width (i.e., the mesial and buccal-lingual width of the alveolar bone) and height.

[0058] In this embodiment, 3Shape or other professional software can be used to overlay the above-mentioned image data and scan data. For example, when using 3Shape, the CBCT image data and scan data can be imported into the 3Shape software for data overlay. The software can be used to accurately extract the morphology and size data of the alveolar bone and gingiva, and visualize the internal structure of the alveolar bone and the surface contour of the gingival soft tissue to assist in the subsequent fabrication of implants and guides.

[0059] S3: Based on the alveolar bone volume and mucosal thickness, determine the number, location, and specifications of the custom implant 1, and fabricate it.

[0060] Locations where the maxillary bone volume meets the implantation 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 implantation requirements are an alveolar bone width greater than 4 mm (both mesial and buccal-lingual widths are greater than 4 mm) and an alveolar bone height greater than 4 mm. More than 4 sites are selected from the initial sites as implantation sites for custom implant 1, and the number and location of custom implant 1 are obtained. The height of the transgingival portion of the custom implant 1 is set according to the mucosal thickness, ensuring that the upper surface of the transgingival portion is flush with the upper surface of the mucosa.

[0061] Preferably, the number of custom-made implants 1 can be determined based on the osseointegration area and occlusal force of a single custom-made implant 1. The number of custom-made implants 1 on one side of the oral cavity is equal to the ratio of the total occlusal force (i.e., the occlusal force on the left or right side of the oral cavity, approximately 800N) to the occlusal force that a single implant can withstand. The occlusal force that a single implant can withstand is equal to the osseointegration area of ​​a single custom-made implant 1 and the load-bearing capacity per square millimeter of alveolar bone (approximately 3-5N / mm²). 2 The product of the osseointegration area of ​​a single custom implant 1 and the surface morphology coefficient (approximately 1.5 to 2.5) is given by the product of the lateral area of ​​the implanted portion and the surface morphology coefficient.

[0062] In this embodiment, the customized implant 1 can be modeled in the software according to the obtained quantity, location and specifications (including the size of the implant part and the height of the perforated part; for the size of the implant part, a suitable specification can be selected from the preset specifications, such as a large implant part size when the bone volume is large). The model of the customized implant 1 also includes a first limiting hole 11 and a threaded blind hole 12. After modeling, 3D printing is performed according to the model data.

[0063] S4: Based on the number and location of the customized implants 1, set up a matching fixation connector, and at the same time set up a corresponding number of repair abutments 3 and repair abutment internal screws 4.

[0064] In this embodiment, the fixation connector 2 includes a fixation part 21 and a connecting part 22. The fixation part 21 is a circular structure with the same diameter as the diameter of the perforated part. A second limiting hole 23 and a circular hole 24 are provided at the center of the fixation part 21, and a first limiting step 25 is provided at the lower end. The connecting part 22 is disposed between two adjacent fixation parts 21, connecting multiple fixation parts 21 into a whole. The thickness is greater than or equal to 1 mm, and the width is slightly narrower than the diameter of the upper end face of the perforated part.

[0065] S5: Determine the crown height based on the vertical distance occlusal relationship data and fabricate it. Set the sleeve crown fastening device 5 at the left and right 4th and 5th tooth positions selected in the whole crown.

[0066] In this embodiment, the portion of the crown mounted on the abutment 3 is made into a sleeve crown. Since pure titanium cannot be porcelain-fused to, a pure titanium disc can be cut into a sleeve crown support and then resin tooth is made as the final crown.

[0067] Select the 4th and 5th teeth on the left and right sides of 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 be inserted into the retention hole from the labial side and fixedly connected to the retention nut 52. Set a gap in the sleeve of the crown corresponding to the position of the retention strip 51.

[0068] S6: Based on the number, position and specifications of the customized implants 1, a double-layered implantation guide plate is set. One layer is set with small implantation holes for drilling bone preparation holes to ensure the position of the implants. The other layer is set with large implantation holes for implanting the customized implants 1 to ensure that there is a common positioning channel between each customized implant 1. Based on the specifications of the repair abutment 3, a repair abutment guide plate is set to ensure that there is a common positioning channel between each repair abutment 3.

[0069] Based on the visualized internal structure of the alveolar bone and the surface contour of the gingival soft tissue, a double-layer perforated implant guide is set. Small implant holes are set on one layer of the implant guide according to the number and position of the customized implant 1, and large implant holes are set on the other layer of the implant guide according to the position and specifications of the customized implant 1. Based on the visualized internal structure of the alveolar bone and the surface contour of the gingival soft tissue, a prosthetic abutment guide is set. Installation holes are set on the prosthetic abutment guide according to the position and specifications of the prosthetic abutment 3.

[0070] In this embodiment, it is ensured that there is a common path of placement between the implant and the restorative abutment. That is, when installing the restorative abutment 3 and crown on multiple custom-made implants 1, the direction must be consistent, so that each restorative abutment 3 and the telescopic crown can be smoothly and simultaneously attached without jamming, deviation or stress interference.

[0071] In this embodiment, after the fabrication of the custom-made, removable, immediate loading fixed denture for edentulous individuals is completed, the dentist will implant it. The implantation process is as follows:

[0072] The double-layer perforated implant guide is placed on the tooth jaw that needs to be restored. Bone preparation holes are drilled sequentially according to the small implant holes on the guide. The single-layer guide with the small implant holes is removed. Each root-type implant 1 is inserted into the bone preparation hole sequentially according to the large implant holes on the other guide, ensuring that each custom implant 1 has a common placement path. The single-layer guide with the large implant hole is then removed.

[0073] The retention connector 2 is positioned above each custom-made implant 1 along the shape of the jaw. Then, the restorative abutment guide is placed on the jaw that needs to be restored. Each restorative abutment 3 is then installed in sequence according to the position of the mounting holes on the restorative abutment guide, so that the second limiting step 31 at its lower end sinks into the second limiting hole 23 of the retention connector 2, ensuring that each restorative abutment 3 has a common placement path. The restorative abutment screw 4 is then passed through the internal through hole of the restorative abutment 3 and the circular hole 24 at the center of the retention part 21 in sequence, and screwed into the threaded blind hole 12 at the upper end of the custom-made implant 1, connecting the custom-made implant 1, the retention connector 2 and the restorative abutment 3 into a whole. The restorative abutment guide is then removed, so that the whole can generate a combined force, enhance the ability to resist occlusal forces, and increase the initial stability of the implant.

[0074] Select the 4th and 5th teeth on the left and right sides of the overall crown. Set the sleeve crown fastening device 5 at the selected tooth position. Specifically, set the retention hole on the labial side of the crown between the adjacent restorative abutments 3. Place the retention strip 51 horizontally and tightly against the lingual side of the adjacent restorative abutment 3. Insert the retention screw 53 from the labial side into the retention hole and fix it to the retention nut 52, so that the crown is fastened to the restorative abutment 3, and the restoration process is completed.

[0075] In this utility model, the terms "installation," "connection," "linking," and "fixing" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; "linking" can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of these terms in this utility model according to the specific circumstances.

[0076] The shapes of the components in the accompanying drawings are schematic and may differ from their actual shapes. The drawings are only used to illustrate the principle of this utility model and are not intended to limit this utility model.

[0077] Although the present invention has been disclosed in detail with reference to the accompanying drawings, it should be understood that these descriptions are merely exemplary and not intended to limit the application of the present invention. The scope of protection of the present invention is defined by the appended claims and may include various modifications, alterations, and equivalents made to the invention without departing from the scope and spirit of the present invention.

Claims

1. A custom-made, detachable, immediate loading fixed denture for edentulous individuals, characterized in that, The custom-made removable edentulous immediate loading fixed denture includes: a custom-made implant (1), a retention connector (2), and a restorative abutment (3), wherein the custom-made implant (1) includes at least four; The threaded part of the custom implant (1) is placed in the alveolar bone and the upper part is placed in the gingiva. The upper surface of the custom implant (1) is flush with the gingiva. The retention connector (2) is a strip structure that is laid horizontally above each custom implant (1) along the shape of the jaw. The restorative abutment (3) is set above the retention connector (2) at the position corresponding to the custom implant (1). The fixed custom implant (1) and the restorative abutment (3) form an independent implant. The retention connector (2) is used to connect the implants at each implantation point into a whole.

2. The custom-made, detachable, edentulous, immediate loading fixed denture as described in claim 1, characterized in that, The custom-made detachable edentulous immediate loading fixed denture also includes a prosthesis abutment screw (4). Holes for installing the repair abutment screws (4) are provided on the fixation connector (2) at the position corresponding to the custom implant (1). The repair abutment screws (4) pass through the holes on the fixation connector (2) to fix the repair abutment (3) to the custom implant (1).

3. The custom-made, detachable, edentulous, immediate loading fixed denture as described in claim 1, characterized in that, The lower end of the custom implant (1) is a threaded implantation part, which is used to be implanted into a pre-drilled bone cavity in the alveolar bone. The upper end of the custom implant (1) is an inverted frustum-shaped perforation part, the upper surface of which is flush with the surface above the gingiva.

4. The custom-made, detachable, edentulous, immediate loading fixed denture as described in claim 3, characterized in that, A first limiting hole (11) is provided at the top center of the perforated portion. A threaded blind hole (12) for screwing in the screw (4) of the repair abutment 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 implanted portion and the perforated portion.

5. The custom-made, detachable, edentulous, immediate loading fixed denture as described in claim 4, characterized in that, The retaining connector (2) includes a retaining part (21) and a connecting part (22); The retention portion (21) is positioned directly above the custom implant (1), and its diameter is the same as the diameter of the upper end face of the transgingival portion. The connecting portion (22) is positioned between two adjacent retention portions (21) to connect multiple retention portions (21) into a whole. The overall shape of the retention connector (2) matches the shape of the corresponding tooth jaw.

6. The custom-made, detachable, edentulous, immediate loading fixed denture as described in claim 5, characterized in that, The fixed part (21) is provided with a second limiting hole (23) at the center position. A circular hole (24) for passing through the screw (4) inside the repair base is opened 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 fixed part (21). The first limiting step (25) is used to sink into the first limiting hole (11) when the fixed connector (2) is installed. The contact surface between the connecting part (22) and the mucosa is designed with static pressure to match the shape of the mucosa.

7. The custom-made, detachable, edentulous, immediate loading fixed denture as described in claim 5, characterized in that, The repair base (3) is located directly above the fixed part (21), and a through hole for installing the screw (4) inside the repair base is provided at its center position. The position of the through hole corresponds to the position of the round hole (24) at the center of the fixed part (21).

8. The custom-made, detachable, edentulous, immediate loading fixed denture as described in claim 6, characterized in that, The lower end of the repair base (3) is provided with a second limiting step (31), which is used to sink into the second limiting hole (23) when the repair base (3) is installed.

9. The custom-made, detachable, edentulous, immediate loading fixed denture as described in claim 1, characterized in that, The custom-made detachable edentulous immediate loading fixed denture also includes a crown and a sleeve crown fastening device (5). The crown is a sleeve crown with a connecting crown. The sleeve crown fastening device (5) is used to fasten the sleeve crown to the restorative abutment (3) by connecting the lingual side of the restorative abutment (3) and the labial side of the crown with a clip and a screw respectively.

Images