Integrated implant temporary crown and restoration with angled screw access

Abstract

The application relates to the technical field of oral implant restoration, and discloses an integrated implant temporary restoration crown with an angle screw channel and a restoration body, which comprises an integrally formed upper crown section and a lower connecting section, the upper crown section is located above the lower connecting section, the lower connecting section is used for directly matching and connecting with a target implant, an angle screw channel is formed in the crown, the angle screw channel is obliquely extended from the outer surface of the upper crown section to the lower connecting section, and is used for allowing a locking screw to enter and be connected with an internal thread hole of the target implant; the restoration body comprises the target implant, the locking screw and the above-mentioned crown. According to the application, the upper crown section, the lower connecting section and the angle screw channel are integrally formed through 3D printing, the independent base and the intermediate connecting piece are reduced, and the preparation and assembly process of the temporary restoration body is simplified.

Description

Technical Field

[0001] This invention relates to the field of dental implant restoration technology, and more specifically, to an integrated implant-supported temporary dental crown and restoration with an angled screw channel. Background Technology

[0002] Dental implant restoration is currently an important clinical method for restoring missing or damaged teeth. The conventional structure of an implant restoration includes three core components: the implant itself, the abutment, and the crown. The implant is inserted into the alveolar bone to form osseointegration with the bone tissue. The abutment connects the implant to the superstructure crown, and the crown restores the tooth's shape and occlusal function. In traditional implant restoration procedures, a horizontal interface (usually an internal hexagonal, external hexagonal, or tapered locking structure) is used between the implant and the abutment. The abutment is fixed to the implant using a central screw, and the crown is then attached to the abutment using either adhesive bonding or screw fixation.

[0003] Currently, the preparation of temporary dental crowns for implantation mainly faces the following technical challenges: First, traditional implant restorations use a split structure, requiring a horizontal interface structure between the implant and the abutment. This interface structure not only increases the height space occupied by the restoration but also complicates the mechanical transmission path of the restoration, making it prone to stress concentration at the interface.

[0004] Secondly, the preparation process of temporary dental crowns is complex. It usually requires the abutment to be made first, and then the temporary crown to be made on the abutment. This involves multiple processing steps and multiple patient visits, resulting in a long restoration cycle and making it difficult to meet the clinical needs for immediate restoration.

[0005] Third, traditional processing methods (such as CAD / CAM CNC milling) for preparing implant restorations have problems such as large material waste, high processing costs, and difficulty in preparing complex and personalized shapes.

[0006] With the development of digital dental technology, researchers have begun to explore the application of 3D printing technology in the fabrication of dental prostheses. For example, patent CN222841099U discloses an abutment-less integrated crown implant restoration device that directly connects the crown to the implant via a MU (Mechanical Unit) connector, eliminating the need for a traditional abutment structure. Other studies have utilized 3D printing technology to create personalized implants. Selective laser melting (SLM) technology can print high-strength, high-precision titanium alloy implants with realistic surface thread morphology, exhibiting better stress distribution and initial stability. However, existing integrated crown solutions still require a separate MU connector as an intermediate link, failing to achieve a truly integrated prosthesis design and remaining unresolved in terms of rapid fabrication and immediate restoration of temporary prostheses. Summary of the Invention

[0007] In view of this, the present invention provides an integrated implant-supported temporary dental crown and restoration with an angled screw channel, aiming to solve the above problems.

[0008] The present invention provides an integrated implantable temporary dental crown with an angled screw channel, comprising an integrally formed upper crown segment and a lower connecting segment; The upper crown segment is located above the lower connecting segment; The lower connecting section is used for direct connection with the target implant, and the shape and structure of the lower connecting section are matched with the interface specifications of the target implant. An angled screw channel is formed within the integrated implant temporary restoration crown. The angled screw channel extends obliquely from the outer surface of the upper crown segment to the lower connecting segment. The channel axis of the angled screw channel does not coincide with the central axis of the lower connecting segment. The angled screw channel is used to allow the locking screw to enter, so that the locking screw can be connected to the internal threaded hole of the target implant through the angled screw channel; The upper crown segment, the lower connecting segment, and the angle screw channel are integrally formed by 3D printing, and there is no physical interface or assembly interface between the upper crown segment and the lower connecting segment.

[0009] Furthermore, the angle screw channel includes an inclined entry section located within the upper crown segment and a locking alignment section located within the lower connecting segment. The inclined entry section communicates with the locking alignment section, and the locking alignment section is disposed opposite to the internal threaded hole of the target implant.

[0010] Furthermore, the lower connecting section is provided with an interface structure that matches the interface specifications of the target implant. The interface structure is an internal hexagonal interface, an external hexagonal interface, a tapered locking interface, a triangular spline interface, or a Morse taper interface.

[0011] Furthermore, the lower connecting section is provided with a locking structure at its end that corresponds to the internal threaded hole of the target implant. The locking structure is used to prevent the lower connecting section from loosening relative to the target implant after the locking screw is screwed in.

[0012] Furthermore, a transition region is provided between the upper crown segment and the lower connecting segment, and the transition region is an arc transition structure or a gradually changing cross-section structure.

[0013] Furthermore, the upper crown segment includes a convex shape, an occlusal surface, and an interproximal surface, the convex shape, the occlusal surface, and the interproximal surface being determined based on the morphology of the contralateral tooth, adjacent teeth, and the occlusal relationship of the opposing teeth.

[0014] Furthermore, the integrated implant-supported temporary dental crown is a titanium alloy one-piece printed component or a medical-grade light-cured resin one-piece printed component.

[0015] Furthermore, the titanium alloy integral printed part is a selective laser melting formed part, and the medical-grade photocurable resin integral printed part is a photocurable formed part.

[0016] On the other hand, the present invention also provides an integrated temporary implant restoration with angled screw channels, including a target implant, a locking screw, and the aforementioned integrated temporary implant restoration crown with angled screw channels; The target implant is provided with an internal threaded hole; The lower connecting section directly mates with the interface of the target implant; The locking screw enters the lower connecting section through the angle screw channel and is threadedly connected to the internal threaded hole of the target implant.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows: This invention integrates the upper crown segment, lower connecting segment, and angle screw channel through 3D printing. The lower connecting segment can directly connect with the target implant without the need for a separate traditional abutment or intermediate connecting parts such as MU connecting components. This reduces the number of components in the temporary restoration and simplifies the installation structure of the temporary restoration.

[0018] In this invention, there is no physical interface or assembly interface between the upper crown segment and the lower connecting segment. The occlusal load can be continuously transferred from the upper crown segment to the lower connecting segment through the integrally formed structure, and then to the target implant. This avoids stress concentration at the abutment connection interface, crown bonding interface, or intermediate connector interface of the traditional "implant-abutment-crown" split structure, thereby reducing the risk of loosening of the connection, interface detachment, or local stress imbalance during the temporary restoration stage.

[0019] This invention incorporates an angled screw channel within an integrated implant-supported temporary crown. This channel extends obliquely from the outer surface of the upper crown segment to the lower connecting segment, allowing the locking screw to connect to the internal threaded hole of the target implant via the angled screw channel. Thus, even with the lower connecting segment directly matching the target implant interface, screw retention is still achieved, preventing issues arising from inconsistencies between the implant's axial position and the ideal crown shape that could affect the installation and restorative shape of the temporary crown.

[0020] This invention allows the integrated temporary implant crown to be directly installed on the target implant by matching the lower connecting section with the interface specifications of the target implant. This eliminates the need for multiple steps in traditional temporary restorations, such as abutment fabrication, abutment installation, crown fabrication, crown bonding, or separate crown fixation. This helps to shorten the preparation and insertion cycle of the temporary crown and meets the needs of immediate temporary restoration after implantation.

[0021] This invention uses 3D printing to integrally form the upper crown segment and the lower connecting segment. It can simultaneously complete the implant interface matching, crown shape design and angle screw channel design in the same digital model. Compared with the traditional CAD / CAM milling method, it is more suitable for forming an integrated restoration with complex internal channels, personalized crown shape and implant adaptation structure, while reducing material cutting waste.

[0022] The upper crown segment of this invention can be personalized according to the anatomical morphology of the missing tooth, the morphology of adjacent teeth, the occlusal relationship of the opposing teeth, and the contour of the gingival soft tissue. The lower connecting segment can be matched according to the target implant interface specifications, thereby taking into account the intraoral adaptability, occlusal relationship, and soft tissue support effect of the temporary restoration.

[0023] The present invention provides a transition region between the upper crown segment and the lower connecting segment. The transition region adopts a circular arc transition structure or a gradually changing cross-section structure, which makes the cross-sectional change between the crown segment and the connecting segment more continuous, which helps to reduce local stress concentration caused by abrupt changes in cross-section during the transmission of occlusal load.

[0024] The integrated implantable temporary dental crown of the present invention can be made of titanium alloy or medical-grade light-cured resin, depending on the clinical restoration cycle and stress requirements. This allows for sufficient structural strength in long-term temporary restoration scenarios and balances preparation efficiency and temporary wearing needs in short-term temporary restoration scenarios. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 An integrated temporary implant prosthesis with an angled screw channel is provided in an embodiment of the present invention; Figure 2 This is a top view of the implant provided in an embodiment of the present invention.

[0027] In the diagram: 1. Upper crown segment; 2. Lower connecting segment; 3. Angle screw channel; 4. Interface structure; 5. Transition area; 6. Locking screw; 7. Target implant. Detailed Implementation

[0028] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0029] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0030] See Figure 1 and Figure 2 As shown, this embodiment provides an integrated temporary implant-supported dental crown with an angled screw channel, including an upper crown segment 1 and a lower connecting segment 2. The upper crown segment 1 and the lower connecting segment 2 are integrally formed structures, with the upper crown segment 1 located above the lower connecting segment 2, and the lower connecting segment 2 used for direct mating and connection with the target implant 7.

[0031] The upper crown segment 1 is used to form the crown shape of the temporary restorative crown. The upper crown segment 1 includes the projection, occlusal surface, and proximal surface. The projection, occlusal surface, and proximal surface are determined based on the morphology of the contralateral corresponding tooth, adjacent teeth, and the occlusal relationship of the opposing teeth, so that the upper crown segment 1 can adapt to the temporary restoration needs of the patient's missing tooth.

[0032] The lower connecting segment 2 is used for direct interface mating with the target implant 7. The external structure of the lower connecting segment 2 matches the interface specifications of the target implant 7. These interface specifications include the shape, size, and mating method of the upper interface of the target implant 7. The lower connecting segment 2 is provided with an interface structure 4, which matches the interface specifications of the target implant 7. The interface structure 4 can be an internal hexagonal interface, an external hexagonal interface, a tapered locking interface, a triangular spline interface, or a Morse taper interface. Through the interface structure 4, the lower connecting segment 2 can be directly connected to the target implant 7 without the need for a separate abutment or a separate intermediate connecting component between the target implant 7 and the upper crown segment 1.

[0033] An angled screw channel 3 is formed within the integrated implant temporary restoration crown. The angled screw channel 3 extends obliquely from the outer surface of the upper crown segment 1 to the lower connecting segment 2. The central axis of the angled screw channel 3 does not coincide with the central axis of the lower connecting segment 2. Through this structure, the locking screw 6 can enter the integrated implant temporary restoration crown along the oblique direction and connect with the internal threaded hole in the target implant 7.

[0034] The angle screw channel 3 extends along the channel direction and includes an inclined entry section and a locking alignment section. The inclined entry section is located within the upper crown section 1, and the locking alignment section is located within the lower connecting section 2. The inclined entry section and the locking alignment section are connected, and the locking alignment section is positioned opposite to the internal threaded hole of the target implant 7. After entering through the inclined entry section, the locking screw 6 continues into the locking alignment section and is threadedly connected to the internal threaded hole of the target implant 7.

[0035] The lower connecting segment 2 has a locking structure at its end that corresponds to the internal threaded hole of the target implant 7. The locking structure is located in the end region of the lower connecting segment 2 facing the target implant 7. After the locking screw 6 is screwed into the internal threaded hole of the target implant 7, the locking structure and the locking screw 6 together prevent the lower connecting segment 2 from loosening relative to the target implant 7, so that the integrated implant temporary restoration crown can be fixed on the target implant 7.

[0036] A transition region 5 is provided between the upper crown segment 1 and the lower connecting segment 2. The transition region 5 can be a circular arc transition structure or a gradually changing cross-section structure. Through the transition region 5, a continuous transition is formed between the upper crown segment 1 and the lower connecting segment 2, reducing the adverse effects of abrupt changes in cross-section on load transfer.

[0037] The upper crown segment 1, the lower connecting segment 2, and the angle screw channel 3 are integrally formed by 3D printing. After printing, the upper crown segment 1 and the lower connecting segment 2 are continuous in material and structure, with no physical interface or assembly interface between them. The angle screw channel 3 is formed simultaneously with the upper crown segment 1 and the lower connecting segment 2 during the 3D printing process, eliminating the need for subsequent assembly to form the channel structure.

[0038] In one embodiment, the integrated implant-supported temporary prosthetic crown is a one-piece printed titanium alloy component. The one-piece printed titanium alloy component is a selective laser melting (SLM) formed component. The one-piece printed titanium alloy component is suitable for applications where the strength requirements of the temporary prosthetic structure are relatively clear.

[0039] In another embodiment, the integrated implant-supported temporary dental crown is a medical-grade light-cured resin integrally printed part. The medical-grade light-cured resin integrally printed part is a light-cured molded part. The medical-grade light-cured resin integrally printed part is suitable for applications requiring rapid fabrication of temporary dental crowns.

[0040] This embodiment also provides an integrated temporary implant restoration with an angled screw channel, including a target implant 7, a locking screw 6, and the aforementioned integrated temporary implant crown. The target implant 7 has an internal threaded hole. The lower connecting section 2 directly mates with the interface of the target implant 7. The locking screw 6 enters the lower connecting section 2 through the angled screw channel 3 and is threadedly connected to the internal threaded hole of the target implant 7, thereby fixing the integrated temporary implant crown onto the target implant 7.

[0041] During assembly, the interface structure 4 of the lower connecting section 2 aligns and engages with the interface of the target implant 7, with the upper crown section 1 positioned above the target implant 7. Subsequently, the locking screw 6 enters the lower connecting section 2 through the angle screw channel 3 and screws into the internal threaded hole of the target implant 7. After the locking screw 6 is tightened, the lower connecting section 2 and the target implant 7 form a fixed connection, and the upper crown section 1 is directly supported on the lower connecting section 2 through an integrally molded structure.

[0042] With the above structure, this invention retains the screw-based retention method while reducing the use of independent abutments and intermediate connecting components in traditional temporary restorations. This allows the temporary crown to be directly connected to the target implant 7 via the integrally formed lower connecting section 2, and the locking screw 6 is installed through the angled screw channel 3. This structure simplifies the assembly process of temporary restorations, shortens the temporary restoration cycle, and mitigates the adverse effects of multiple connecting interfaces on force transmission in split structures. Example

[0043] This embodiment provides a metal-integrated implant temporary restoration crown, which is a Ti-6Al-4V titanium alloy integrally printed part based on selective laser melting.

[0044] like Figure 1 As shown, the integrated metal implant temporary restoration crown includes an integrally formed upper crown segment 1 and a lower connecting segment 2. The upper crown segment 1 is located above the lower connecting segment 2. The lower connecting segment 2 is used for direct mating and connection with the target implant 7, and the lower connecting segment 2 is provided with an interface structure 4 that matches the interface specifications of the target implant 7. In this embodiment, the interface structure 4 is an internal hexagonal interface structure with a diagonal diameter of 3.5 mm, a taper of 5°, and a height of 4 mm for the lower connecting segment 2.

[0045] The upper crown segment 1 is anatomically designed based on the morphology of the contralateral tooth, adjacent teeth, and occlusal relationship of the opposing teeth. The upper crown segment 1 includes its convex shape, occlusal surface, and proximal surface, and is used to restore the crown shape and occlusal contact relationship of the temporary prosthetic crown. A transition region 5 is provided between the upper crown segment 1 and the lower connecting segment 2. The transition region 5 is a circular arc transition structure with a radius of 1 mm, creating a continuous cross-sectional transition between the upper crown segment 1 and the lower connecting segment 2.

[0046] An angled screw channel 3 is formed within the integrated metal implant temporary restoration crown. The angled screw channel 3 extends obliquely from the outer surface of the upper crown segment 1 to the lower connecting segment 2, and the channel axis of the angled screw channel 3 does not coincide with the central axis of the lower connecting segment 2. The angled screw channel 3 includes an oblique entry section located within the upper crown segment 1 and a locking alignment section located within the lower connecting segment 2. The oblique entry section and the locking alignment section are connected, and the locking alignment section is positioned opposite to the internal threaded hole of the target implant 7, allowing the locking screw 6 to enter through the angled screw channel 3 and threadedly connect with the internal threaded hole of the target implant 7. The lower connecting segment 2 has a locking structure corresponding to the internal threaded hole of the target implant 7 at its end. This locking structure is formed by the locking alignment section at the end of the lower connecting segment 2 and the interface structure 4, and is used to prevent the lower connecting segment 2 from loosening relative to the target implant 7 after the locking screw 6 is screwed in.

[0047] The preparation process of the metal-integrated implant temporary dental crown in this embodiment is as follows.

[0048] First, an intraoral scanner is used to scan the edentulous area to obtain a three-dimensional digital model, including the occlusal relationship of the adjacent teeth on both sides of the missing tooth, the opposing teeth, and the gingival contour. Then, the three-dimensional position information of the implanted target implant 7 is obtained through implant scanner or CBCT data. The three-dimensional digital model and the three-dimensional position information of the target implant 7 are used to determine the crown shape of the upper crown segment 1, the position of the interface structure 4 of the lower connecting segment 2, and the extension direction of the angle screw channel 3.

[0049] Then, based on the acquired 3D data, an integrated design was performed in CAD design software, forming a complete digital model including the upper crown segment 1, lower connecting segment 2, interface structure 4, transition area 5, and angled screw channel 3. During the design process, the lower connecting segment 2 was configured as an internal hexagonal interface structure according to the interface specifications of the target implant 7; the upper crown segment 1 was designed based on the morphology of the contralateral teeth, adjacent teeth, and the occlusal relationship of the opposing teeth, determining its protrusion, occlusal surface, and proximal surface; the angled screw channel 3 was set in a direction that allows the locking screw 6 to enter from the outer surface of the upper crown segment 1 and align with the internal threaded hole of the target implant 7. The design accuracy of the overall digital model was controlled to ±0.015mm.

[0050] Subsequently, the completed overall digital model was exported in STL format and imported into a selective laser melting (SLM) metal 3D printing device. The printing material used was Ti-6Al-4V titanium alloy powder conforming to GB / T 13810-2007. The SLM parameters were: laser power 150W, scanning speed 800mm / s, layer thickness 30μm, and scanning spacing 0.08mm. The printing direction was set with the lower connecting segment 2 facing downwards and the occlusal surface of the upper crown segment 1 facing upwards, ensuring that the interface structure 4, crown shape, and angle screw channel 3 were integrally formed simultaneously with the upper crown segment 1 and the lower connecting segment 2.

[0051] After printing, the molded workpiece is wire-cut from the printing substrate and placed in an ultrasonic cleaner to remove residual titanium alloy powder. The cleaned workpiece is then placed in a vacuum heat treatment furnace for stress-relieving annealing at 700°C for 2 hours, followed by furnace cooling. After annealing, the surface of the workpiece is mechanically polished, including the surface area in contact with the gingiva, the occlusal contact area, and the adjacent area. After polishing, the interface structure 4 is dimensionally inspected to ensure it meets the interface fit requirements of the target implant 7.

[0052] During assembly, align and position the interface structure 4 of the lower connecting segment 2 with the interface of the target implant 7; insert the locking screw 6 into the lower connecting segment 2 through the angle screw channel 3, and thread the locking screw 6 into the internal threaded hole of the target implant 7. After tightening the locking screw 6, the metal-integrated implant temporary restoration crown is fixed to the target implant 7, eliminating the need for an independent abutment or independent intermediate connecting component between the upper crown segment 1 and the target implant 7. Example

[0053] This embodiment provides a resin-integrated temporary dental crown for implantation. The resin-integrated temporary dental crown is a medical-grade light-cured resin integrated printout based on digital light processing molding, suitable for short-term temporary restoration scenarios.

[0054] In this embodiment, the structure of the resin-integrated temporary implant crown is basically the same as that in Embodiment 1, both including an integrally formed upper crown segment 1 and a lower connecting segment 2. The upper crown segment 1 is located above the lower connecting segment 2, and the lower connecting segment 2 is provided with an interface structure 4 that matches the interface specifications of the target implant 7. A transition area 5 is provided between the upper crown segment 1 and the lower connecting segment 2. An angled screw channel 3 is formed inside the resin-integrated temporary implant crown. The angled screw channel 3 extends obliquely from the outer surface of the upper crown segment 1 to the lower connecting segment 2. The angled screw channel 3 is used for the locking screw 6 to enter and connect with the internal threaded hole of the target implant 7.

[0055] The three-dimensional data acquisition and CAD design process for the resin-integrated temporary implant crown in this embodiment is the same as in Embodiment 1. A three-dimensional digital model of the adjacent teeth on both sides of the missing tooth, the occlusal relationship of the opposing teeth, and the gingival contour is obtained through intraoral scanning. The three-dimensional position information of the target implant 7 is obtained through implant scanning or CBCT data. The upper crown segment 1, lower connecting segment 2, interface structure 4, transition area 5, and angle screw channel 3 are designed in an integrated manner in CAD design software.

[0056] Unlike Example 1, this example uses a digital light processing 3D printing device to print the overall digital model. The designed 3D model is imported into the digital light processing 3D printing device, and the printing material is medical-grade temporary crown / bridge resin, with a flexural strength of not less than 110 MPa. The digital light processing molding parameters are: layer thickness 50 μm, and single-layer exposure time 2 to 3 seconds. After printing, a resin-integrated implantable temporary dental crown blank is obtained.

[0057] After printing, the resin-integrated temporary implant crown blank was cleaned with isopropyl alcohol to remove uncured resin. Following cleaning, the blank was placed in a UV curing chamber for secondary light curing at a wavelength of 405nm for 10-15 minutes. After secondary curing, the support structure was removed, and the occlusal surface, proximal surface, and gingival contact area of ​​the upper crown segment 1, as well as the exposed area of ​​the lower connecting segment 2, were ground and polished. The total processing time from printing to completion was controlled within 30 minutes.

[0058] During assembly, the interface structure 4 of the lower connecting section 2 directly mates with the interface of the target implant 7; the locking screw 6 is inserted into the lower connecting section 2 through the angle screw channel 3, so that the locking screw 6 is threadedly connected to the internal threaded hole of the target implant 7. After the locking screw 6 is tightened, the resin integrated implant temporary restoration crown is fixed on the target implant 7. Compared with the traditional split temporary restoration structure, this embodiment does not require separate fabrication and installation of the abutment, nor does it require the setting of an independent intermediate connecting component. Example

[0059] This embodiment provides a multi-unit bridge-type integrated temporary implant restoration, suitable for temporary implant restoration scenarios involving the loss of multiple consecutive teeth.

[0060] The multi-unit bridge-type integrated temporary implant restoration includes a continuous bridge-type crown segment and multiple lower connecting segments 2. The continuous bridge-type crown segment is located above the multiple lower connecting segments 2, which are used to directly connect with multiple target implants 7. Each lower connecting segment 2 is provided with an interface structure 4 that matches the interface specifications of the corresponding target implant 7. The continuous bridge-type crown segment, multiple lower connecting segments 2, multiple interface structures 4, and multiple angle screw channels 3 are integrally formed by 3D printing.

[0061] In this embodiment, three-dimensional data of a region with multiple consecutive missing teeth is first acquired. This three-dimensional data includes the morphology of adjacent teeth on both sides of the missing tooth region, the occlusal relationship of the opposing teeth, the gingival contour, and the three-dimensional position information of multiple target implants 7. The three-dimensional position information of the multiple target implants 7 is obtained through implant scanning or CBCT data.

[0062] Then, the integrated bridge-type structure is designed in CAD design software. The upper part of the integrated bridge-type structure features a continuous bridge-type crown segment, which includes multiple continuously arranged crown units. The lower part of the integrated bridge-type structure features multiple lower connecting segments 2, the positions of which correspond to the actual implantation positions of multiple target implants 7. Each lower connecting segment 2 is equipped with an interface structure 4, and each interface structure 4 matches the interface specifications of the corresponding target implant 7.

[0063] Each lower connecting segment 2 is provided with a corresponding angled screw channel 3. The angled screw channel 3 extends obliquely from the outer surface of the continuous bridge-type crown segment to the corresponding lower connecting segment 2. Each angled screw channel 3 includes an oblique entry section and a locking alignment section. The oblique entry section is located inside the continuous bridge-type crown segment, and the locking alignment section is located inside the corresponding lower connecting segment 2. The locking alignment section is positioned opposite to the internal threaded hole of the corresponding target implant 7, so that the corresponding locking screw 6 can enter through the angled screw channel 3 and be threadedly connected to the internal threaded hole of the corresponding target implant 7.

[0064] After the integrated bridge-type structure design was completed, it was printed using the same selective laser melting forming method as in Example 1. Ti-6Al-4V titanium alloy powder was used as the printing material. After printing, the formed workpiece underwent wire cutting for part removal, ultrasonic cleaning, stress-relief annealing, mechanical polishing, and interface dimension inspection in sequence. The stress-relief annealing conditions were 700℃ for 2 hours, followed by furnace cooling. The polished areas included the occlusal contact area, proximal area, gingival contact surface area of ​​the continuous bridge-type crown segment, and the exposed areas of multiple lower connecting segments 2.

[0065] During assembly, the multiple lower connecting sections 2 are aligned and positioned with the interfaces of the multiple target implants 7. Multiple locking screws 6 are then inserted into the corresponding lower connecting sections 2 via the corresponding angle screw channels 3, and threaded into the internal threaded holes of the corresponding target implants 7. After the multiple locking screws 6 are tightened, the multi-unit bridge-type integrated temporary implant prosthesis is fixed to the multiple target implants 7.

[0066] In this embodiment, areas with multiple consecutive missing teeth can be temporarily restored using an integrated bridge-like structure. Multiple lower connecting segments 2 and the continuous bridge-like crown segment are integrally formed using 3D printing, reducing the increased number of parts required for the separate fabrication and assembly of multiple individual temporary restorations, while maintaining the overall connection between the temporary restoration structures of multiple target implants 7.

[0067] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Various modifications and improvements made to the technical solutions of the present invention by those skilled in the art without departing from the spirit of the present invention should fall within the protection scope defined by the present invention.

Claims

1. An integrated implant-supported temporary dental crown with an angled screw channel, characterized in that, It includes a one-piece molded upper crown segment and a lower connecting segment; The upper crown segment is located above the lower connecting segment; The lower connecting section is used for direct connection with the target implant, and the shape and structure of the lower connecting section are matched with the interface specifications of the target implant. An angled screw channel is formed within the integrated implant temporary restoration crown. The angled screw channel extends obliquely from the outer surface of the upper crown segment to the lower connecting segment. The channel axis of the angled screw channel does not coincide with the central axis of the lower connecting segment. The angled screw channel is used to allow the locking screw to enter, so that the locking screw can be connected to the internal threaded hole of the target implant through the angled screw channel; The upper crown segment, the lower connecting segment, and the angle screw channel are integrally formed by 3D printing, and there is no physical interface or assembly interface between the upper crown segment and the lower connecting segment.

2. The integrated implant-supported temporary dental crown with angled screw channel according to claim 1, characterized in that, The angled screw channel includes an inclined entry section located in the upper crown segment and a locking alignment section located in the lower connecting segment. The inclined entry section communicates with the locking alignment section, and the locking alignment section is disposed opposite to the internal threaded hole of the target implant.

3. The integrated implant-supported temporary dental crown with angled screw channel according to claim 1, characterized in that, The lower connecting section is provided with an interface structure that matches the interface specifications of the target implant. The interface structure is an internal hexagonal interface, an external hexagonal interface, a tapered locking interface, a triangular spline interface, or a Morse taper interface.

4. The integrated implant-supported temporary dental crown with angled screw channel according to claim 1, characterized in that, The lower connecting section is provided with a locking structure at its end that corresponds to the internal threaded hole of the target implant. The locking structure is used to prevent the lower connecting section from loosening relative to the target implant after the locking screw is screwed in.

5. The integrated implant-supported temporary dental crown with angled screw channel according to claim 1, characterized in that, A transition region is provided between the upper crown segment and the lower connecting segment, and the transition region is a circular arc transition structure or a gradually changing cross section structure.

6. The integrated implant-supported temporary dental crown with angled screw channel according to claim 1, characterized in that, The upper crown segment includes a convex shape, an occlusal surface, and an interproximal surface. The convex shape, the occlusal surface, and the interproximal surface are determined based on the morphology of the contralateral tooth, adjacent teeth, and the occlusal relationship of the opposing teeth.

7. The integrated implant-supported temporary dental crown with angled screw channel according to claim 1, characterized in that, The integrated implant-supported temporary dental crown is either a titanium alloy one-piece printed component or a medical-grade light-cured resin one-piece printed component.

8. The integrated implant-supported temporary dental crown with angled screw channel according to claim 7, characterized in that, The titanium alloy integral printed part is a selective laser melting formed part, and the medical-grade photocurable resin integral printed part is a photocurable formed part.

9. An integrated temporary implant prosthesis with an angled screw channel, characterized in that, Includes the target implant, locking screw, and an integrated implant-supported temporary dental crown with an angled screw channel as described in any one of claims 1-8; The target implant is provided with an internal threaded hole; The lower connecting section directly mates with the interface of the target implant; The locking screw enters the lower connecting section through the angle screw channel and is threadedly connected to the internal threaded hole of the target implant.

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