Split type dental crown

Abstract

The invention relates to the technical field of dental implant oral medical treatment, and provides a split type dental crown, which comprises a fastener, the dental crown is a split type dental crown, the dental crown comprises a base dental crown and at least one branch dental crown, the branch dental crowns are sequentially stacked above the base dental crown along the occlusion stress direction, and the fastening piece is arranged on the base dental crown. The number of the fasteners is at least two, the base dental crown and the branch dental crowns respectively correspond to one fastener, the branch dental crowns are fixed through the fasteners, and the fixing points of the branch dental crowns and the fixing point of the base dental crown are relatively offset. According to the technical scheme, the problem of complications such as tooth plugging caused by a gap between the implant tooth and the natural tooth due to toppling of adjacent natural teeth in the prior art is solved.

Description

[0001] This application is a divisional application of application number 2025102580300, filed on March 5, 2025, entitled "An Offset Embedded Dental Implant". Technical Field

[0002] This invention relates to the field of dental implant and oral medical technology, specifically to a split-type dental crown. Background Technology

[0003] Artificial dental crowns are generally classified into metal full crowns, metal-ceramic crowns, all-ceramic crowns, and metal-plastic crowns. The connection methods for the implant superstructure include: screw retention, cement retention, and integrated crowns. (See also...) Figure 1 For dental implants, natural teeth can shift, become loose or damaged due to periodontitis over time, and tilt. This tilting can affect implant placement and cause gaps to form between teeth, leading to food impaction. Food impaction is considered one of the most common complications after fixed dental restorations. Long-term food impaction can damage tooth and periodontal tissues, as well as cause peri-implantitis and alveolar bone resorption, negatively impacting the long-term stability and aesthetics of the implant, reducing chewing comfort, and affecting the patient's quality of life.

[0004] In existing technologies, the common approach to addressing the aforementioned problems is to sacrifice a portion of the natural tooth by grinding down a section of the natural tooth on the side closest to the implant, thus providing limited space for the implant. However, this method has certain drawbacks. First, it causes some damage to the natural tooth, as grinding down part of the crown makes it thinner. Second, even after grinding down a portion of the natural tooth, the installation space remains relatively limited, resulting in a relatively large gap between the implant and the natural tooth, leading to food impaction. Therefore, based on these issues, a new implant structure is needed to solve these problems. Summary of the Invention

[0005] This invention proposes a split-type dental crown, which solves the problem in the prior art where the implant tooth and the natural tooth have gaps due to the tilting of adjacent natural teeth, leading to complications such as food impaction.

[0006] The technical solution of the present invention is as follows: An offset embedded dental implant includes an implant body, an abutment, a crown, and fasteners. The implant body is positioned within the alveolar bone. The crown is a split crown, comprising a base crown and at least one sub-crown. The sub-crowns are stacked sequentially above the base crown along the occlusal force direction. At least two fasteners are provided, with one fastener corresponding to each base crown and each sub-crown. The abutment is positioned on the base crown, and the fasteners pass through the abutment and connect to the implant body. The sub-crowns are fixed by the fasteners, and the fixing points of the sub-crowns are offset relative to the fixing points of the base crown.

[0007] The dental implant also includes at least one inlay; The insert is disposed between the base crown and the sub-crown, and / or The insert is disposed between the tooth crowns.

[0008] The insert includes a first fixed end and a second fixed end, which are offset relative to each other. Both the first fixed end and the second fixed end are provided with a fixing hole for the fastener to pass through.

[0009] The embedding body further includes a first support portion and a second support portion, which are respectively disposed on both sides of the line connecting the first fixed end and the second fixed end.

[0010] The bottom of the dividing crown is provided with a lateral crown body, which is used to fasten to the base crown or the dividing crown below the dividing crown.

[0011] The insert and the base crown are integrally formed.

[0012] The first support portion and the second support portion are provided with positioning holes, and the tooth crown adjacent to the first support portion and the second support portion is provided with corresponding positioning protrusions.

[0013] The fastener is provided with threads, and the fastener is fixed by threaded connection.

[0014] The working principle and beneficial effects of this invention are as follows: This invention discloses an offset embedded dental implant. Specifically, the implant is placed within the alveolar bone. The installation space is assessed based on the actual tilt of the natural teeth on either side of the implant site. A suitable-sized abutment crown is selected according to the space size and the tilt angle of the natural teeth on either side of the implant site. An abutment is provided at the bottom of the abutment crown, which is connected to the implant. Fasteners are inserted from the upper surface of the abutment crown, pass through the abutment, and connect to the implant to form a lock, thus fixing the abutment crown. The size of the abutment crown is smaller than the installation space between the tilted natural teeth, which reduces the installation difficulty. Then, multiple sub-crowns can be sequentially installed on the abutment crown. The installation order of the sub-crowns is designed along the direction of occlusal force. The individual crowns adjacent to the base crown are connected to the base crown via fasteners. The fasteners pass through the individual crowns and connect to the upper surface of the base crown. The fixing points of the fasteners fixing the base crown and the individual crowns are relatively offset. Similarly, when installing more individual crowns on top of the existing ones, the offset fixing points are also used. Considering the inclination of the natural teeth on both sides of the implant site, installing a one-piece crown cannot be done vertically, which will inevitably lead to gaps with the adjacent natural teeth. Therefore, this invention overcomes the difficulty of vertical placement based on the technical concept of offset embedded installation of individual crowns, and also makes the implant fit better with the adjacent natural teeth, avoiding large gaps that could cause food impaction and affect the patient's experience. Attached Figure Description

[0015] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0016] Figure 1 This is a schematic diagram of the structure of dental implants in existing technology; Figure 2 This is a schematic diagram of one embodiment of the dental implant in the present invention, showing the structure of a multi-layered crown; Figure 3 This is a schematic diagram of another embodiment of the dental implant in the present invention, showing the structure of a single-layer sub-crown. Figure 4 This is a schematic diagram of a specific structure of one embodiment of the dental implant of the present invention, showing the structure connecting the sub-crown and the base crown; Figure 5 for Figure 4 A cross-sectional view along the AA direction, showing the structure of the embedded connection; In the diagram: 1. Implant, 2. Abutment, 3. Fastener, 4. Base crown, 5. Separating crown, 6. Inlay, 7. First fixed end, 8. Second fixed end, 9. First support, 10. Second support, 11. Lateral crown, 12. Positioning hole, 13. Positioning protrusion. Detailed Implementation

[0017] The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. 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 of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0018] like Figures 2-5 As shown in the figure, this embodiment proposes an offset embedded dental implant, which includes an implant 1, an abutment 2, a crown, and fasteners 3. The implant 1 is used to be placed in the alveolar bone. The crown is a split crown, which includes a base crown 4 and at least one sub-crown 5. The sub-crowns 5 are stacked sequentially on top of the base crown 4 along the occlusal force direction. At least two fasteners 3 are provided, with each base crown 4 and each sub-crown 5 corresponding to one fastener 3. The abutment 2 is disposed on the base crown 4. The fastener 3 passes through the abutment 2 and is connected to the implant 1. The sub-crowns 5 are fixed by the fasteners 3, and the fixing point of the sub-crown 5 is offset relative to the fixing point of the base crown 4.

[0019] This embodiment discloses an offset embedded dental implant. Specifically, an implant 1 is implanted into the alveolar bone. Then, considering the actual tilt of the natural teeth on both sides of the implant site, the installation space is assessed. Based on the space size and the tilt angle of the natural teeth on both sides of the implant site, a suitable-sized abutment crown 4 is selected. An abutment 2 is provided at the bottom of the abutment crown 4, which is connected to the implant 1. Fasteners 3 are inserted from the upper surface of the abutment crown 4, pass through the abutment 2, and connect to the implant 1 to form a lock, thus fixing the abutment crown 4. The size of the abutment crown 4 is smaller than the installation space between the tilted natural teeth, which reduces the installation difficulty. Then, multiple sub-crowns 5 can be installed sequentially on the abutment crown 4. The installation order of the sub-crowns 5 is set along the direction of occlusal force. The design involves connecting the sub-crown 5 adjacent to the base crown 4 to the base crown 4 via fasteners 3. The fasteners 3 pass through the sub-crown 5 and connect to the upper surface of the base crown 4. The fixing points of the fasteners 3 fixing the base crown 4 and the sub-crown 5 are relatively offset. Similarly, when installing the sub-crown 5 on top of the base crown 4, the offset fixing points are also used. Considering the inclination of the natural teeth on both sides of the implant site, installing a one-piece crown would not be possible if it were placed vertically, inevitably resulting in gaps with the adjacent natural teeth. Therefore, this invention, based on the technical concept of offset embedding of separate crowns, overcomes the difficulty of vertical placement and also allows for better fit between the implant and the adjacent natural teeth, avoiding large gaps that could lead to food impaction and affect the patient's experience.

[0020] In some possible embodiments, the split crown can be a combination of a base crown 4 and a split crown 5, or a combination of a base crown 4 and multiple split crowns 5. This is not limiting and can be reasonably selected according to the installation space and the tilt of the natural teeth adjacent to the implant site.

[0021] For example, taking a combination of a base crown 4 and a partial crown 5 as an example, during installation, first, the smaller one, smaller than the installation space of the implant site, is installed so that the adjacent natural tooth is tilted, allowing the base crown 4 to be installed vertically. The abutment 2 on the base crown 4 is positioned on the implant 1. Then, the fastener 3 passes through the base crown 4 and the abutment 2 and connects to the implant 1, using the fastener 3 to fix the base crown 4 to the implant 1. Then, the partial crown 5 is installed above the base crown 4, and the fastener 3 passes through the partial crown 5 and connects to the base crown 4, thus fixing the partial crown. 5. Fixing: The base crown 4 can be provided with fixing holes for fixing fasteners 3. Since the base crown 4 can be installed vertically to avoid tilted natural teeth, the relatively short sub-crowns 5 installed on the base crown 4 can also adapt to tilted natural teeth and avoid large gaps on the sides of natural teeth. At the same time, the fixing points of the fasteners 3 fixing the sub-crowns 5 and the fasteners 3 fixing the base crown 4 are relatively offset, which greatly improves the flexibility of installation. At the same time, it can also overcome the problem of side gaps causing food impaction caused by the existing one-piece crown.

[0022] The dental implant also includes at least one inlay 6; The insert 6 is disposed between the base crown 4 and the sub-crown 5, and / or The insert 6 is disposed between the tooth crowns 5.

[0023] Based on the above embodiments, the dental implant also includes at least one inlay 6. As described in the above embodiments, the split crown can be a combination of a base crown 4 and a split crown 5, or a combination of a base crown 4 and multiple split crowns 5. When the split crown uses a combination of a base crown 4 and a split crown 5, the inlay 6 is installed between the base crown 4 and the split crowns 5. When a combination of a base crown 4 and multiple split crowns 5 is used, the inlay 6 is installed between the base crown 4 and the split crowns 5, and also between the split crowns 5. The inlay 6 helps to improve the connection strength between the split crowns and improves the uniformity and stability of the force between the split crowns during occlusion. It should be noted that the inlay 6 is a type of connector installed at the connection point of the split crown, and the size and shape of the inlay 6 at different locations may vary to some extent.

[0024] It is conceivable that the insert 6 is located at the connection point of the split crown. Specifically, the insert 6 can be integrally molded or integratedly installed on the lower crown, such as on the upper surface of the base crown 4 or the upper surface of the split crown 5. In other conceivable embodiments, the insert 6 can also be fixed to the upper surface of the base crown 4 or the split crown 5 by fasteners 3. The above are all possible embodiments and are not limiting; other feasible installation methods can also be adopted.

[0025] The insert 6 includes a first fixed end 7 and a second fixed end 8, which are offset relative to each other. Both the first fixed end 7 and the second fixed end 8 are provided with a fixing hole for the fastener 3 to pass through.

[0026] In this embodiment, the inlay 6 is installed at the connection of the split crown. Taking the base crown 4 and a separate crown 5 as an example, the inlay 6 is installed on the upper surface of the base crown 4. The inlay 6 includes a first fixed end 7 and a second fixed end 8, and both the first fixed end 7 and the second fixed end 8 are provided with fixing holes for the fastener 3 to pass through. The first fixed end 7 and the second fixed end 8 are relatively offset. During installation, the inlay 6 can be integrated or detached and installed on the top of the base crown 4. When the base crown 4 is fixed, the fastener 3 passes through the first fixed end 7 and connects to the implant 1, fixing the inlay 6 on the top of the base crown 4. Then, when the separate crown 5 is installed on the base crown 4, the fastener 3 passes through the separate crown 5 and then through the second fixed end 8 and connects to the base crown 4, thereby fixing it. The inlay 6 is installed between the separate crown 5 and the base crown 4 through the fixation at both ends. The presence of the inlay 6 improves the overall connection stability of the split crown and also improves the uniformity and dispersion of the occlusal force of the crown, thus improving the practicality of the split crown.

[0027] The embedding body 6 also includes a first support portion 9 and a second support portion 10, which are respectively disposed on both sides of the line connecting the first fixed end 7 and the second fixed end 8.

[0028] Based on the above embodiments, the inlay 6 further includes a first support portion 9 and a second support portion 10. The first support portion 9 and the second support portion 10 are located on both sides of the line connecting the first fixed end 7 and the second fixed end 8. The first support portion 9 and the second support portion 10 improve the stability of the inlay 6. At the same time, the inlay 6 between the split crown 5 and the base crown 4 provides more support for the force on the split crown 5, and can more effectively distribute and transmit the force of the split crown 5 during occlusion to the base crown 4 and the implant 1, thereby improving the stability of the split crown during occlusion.

[0029] It should be noted that the specific shape and size of the first support portion 9 and the second support portion 10 on both sides of the insert 6, as well as the first fixed end 7 and the second fixed end 8, can be adaptively adjusted according to the actual tooth condition to achieve the best fit. The above is an interpretation and limitation of the relative positions and functions of the first fixed end 7, the second fixed end 8, the first support portion 9, and the second support portion 10. The structure based on the above technical concept is only different in shape and size and should be understood as being within the above structural range.

[0030] The bottom of the dividing crown 5 is provided with a lateral crown 11, which is used to fasten to the base crown 4 or the dividing crown 5 below the dividing crown 5.

[0031] In this embodiment, a lateral crown 11 is also provided at the bottom of the split crown 5. The lateral crown 11 is a relatively thin crown and forms a snap-fit ​​cap-shaped structure at the bottom of the split crown 5. During installation, the split crown 5 can be snapped onto the top of the base crown 4 or the top of the split crown 5. The lateral crown 11 can be a closed annular crown or a semi-open lateral crown 11, and can be a three-sided crown, a two-sided crown, etc., and can be adapted to the actual installation needs. The lateral crown 11 facilitates installation and also makes the transition of the side surface of the split crown smooth, improving the surface quality.

[0032] The insert 6 and the base crown 4 are integrally formed.

[0033] In this embodiment, the insert 6 and the base crown 4 are designed as an integral molded structure, that is, the insert 6 is integrated on the upper surface of the base crown 4. The integrated installation can improve the convenience of installation.

[0034] The first support portion 9 and the second support portion 10 are provided with positioning holes 12, and the tooth crown 5 adjacent to the first support portion 9 and the second support portion 10 is provided with a corresponding positioning protrusion 13.

[0035] Based on the above embodiments, positioning holes 12 are also provided on the first support 9 and the second support 10. On the corresponding split crown, a positioning protrusion 13 corresponding to its position can be provided. During installation, the positioning protrusion 13 on the split crown 5 is inserted into the positioning hole 12 on the first support 9 and the second support 10, which improves the installation accuracy and provides a certain operating benchmark for the operator. This allows the split crown to be installed closer to the actual design position, thereby making the dental implant better fit the patient.

[0036] The fastener 3 is provided with threads, and the fastener 3 is fixed by threaded connection.

[0037] In this embodiment, the fastener 3 is provided with threads, and the fastener 3 is installed and fixed by the threads. The threads can provide a more stable locking force and are relatively more reliable. At the same time, if maintenance is required, the threaded connection can also be disassembled, which is relatively convenient.

[0038] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A split-type dental crown, characterized in that, The crown includes a fastener (3), the crown includes a base crown (4) and at least one sub-crown (5), the sub-crowns (5) are stacked sequentially above the base crown (4) along the occlusal force direction, the fastener (3) is at least two, the base crown (4) and each sub-crown (5) correspond to one fastener (3), the sub-crowns (5) are fixed by the fastener (3), and the fixing point of the sub-crowns (5) is offset relative to the fixing point of the base crown (4).

2. The split-type dental crown according to claim 1, characterized in that, The crown also includes at least one inlay (6); The insert (6) is disposed between the base crown (4) and the sub-crown (5), and / or The insert (6) is disposed between the tooth crowns (5).

3. The split-type dental crown according to claim 2, characterized in that, The insert (6) includes a first fixed end (7) and a second fixed end (8), which are offset relative to each other. Both the first fixed end (7) and the second fixed end (8) are provided with a fixing hole for the fastener (3) to pass through.

4. The split-type dental crown according to claim 3, characterized in that, The embedding body (6) further includes a first support part (9) and a second support part (10), which are respectively disposed on both sides of the line connecting the first fixed end (7) and the second fixed end (8).

5. The split-type dental crown according to claim 1, characterized in that, The bottom of the sub-dental crown (5) is provided with a lateral crown (11), which is used to fasten to the base crown (4) or the sub-dental crown (5) below the sub-dental crown (5).

6. The split-type dental crown according to claim 2, characterized in that, The insert (6) and the base crown (4) are integrally formed.

7. The split-type dental crown according to claim 4, characterized in that, The first support portion (9) and the second support portion (10) are provided with positioning holes (12), and the tooth crown (5) adjacent to the first support portion (9) and the second support portion (10) is provided with a corresponding positioning protrusion (13).

8. The split-type dental crown according to claim 1, characterized in that, The fastener (3) is provided with threads, and the fastener (3) is fixed by threaded connection.

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