Metal 3D printing dental split type pure titanium post core
By using metal 3D printing technology to manufacture split pure titanium pile cores, and utilizing threaded connections and insert plate structures, the problem of easy breakage at the pile core connection point is solved, achieving stable connection and uniform stress distribution, and reducing processing difficulty and cost.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHANGHAI COMO DENTAL TECH CO LTD
- Filing Date
- 2025-05-27
- Publication Date
- 2026-05-19
AI Technical Summary
The existing split structure of pile core is prone to stress at the mechanical connection, which can lead to breakage at the connection. In addition, traditional processing methods are difficult and costly.
The split-type pure titanium pile core is manufactured using metal 3D printing technology. Through threaded connection and insert plate structure, combined with compression spring and U-shaped groove design, the pile core achieves stable connection and uniform stress distribution.
It improves the stability of pile-core connection, reduces stress concentration, and lowers processing difficulty and cost.
Smart Images
Figure CN224251524U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of pure titanium post core technology, specifically a metal 3D printed dental split-type pure titanium post core. Background Technology
[0002] Posts and cores are a common method for restoring severely damaged teeth. When a tooth is missing most of its crown or only the root remains due to decay, trauma, or other reasons, a post and core are needed to restore the tooth structure.
[0003] Existing split-structure piles rely on mechanical connections (such as threads), which are prone to breakage at the connection due to stress concentration. Furthermore, traditional machining methods (such as CNC cutting) are difficult and costly to process complex split structures. Utility Model Content
[0004] To address the shortcomings of existing technologies, this invention provides a metal 3D printed dental split-type pure titanium post core, which solves the problems mentioned in the background.
[0005] To achieve the above objectives, this utility model is implemented through the following technical solution: a metal 3D printed dental split-type pure titanium post core, including a root post core, a threaded block integrally formed on the top of the root post core, a crown post core provided above the root post core, a threaded groove formed on the bottom of the crown post core, the threaded groove and the threaded block being screwed together, a circular groove formed on the top of the threaded groove, two sliding grooves formed on the outer side wall of the circular groove, an insert plate being slidably connected inside the sliding groove, a circular block being fixed on the top of the threaded block, an insertion port being formed on the top of the circular block, and a shoulder integrally formed on the outer side wall of the crown post core.
[0006] Preferably, the top of the crown core is provided with a hexagonal hole.
[0007] Preferably, the upper inner surface of the slide is provided with a movable opening, the top of the movable opening is connected to the hexagonal hole, and a push plate is fixed to the top of the insert plate.
[0008] Preferably, a compression spring is fixed inside the movable opening, and the other end of the compression spring is fixedly connected to the push plate.
[0009] Preferably, the top edge of the shoulder platform is provided with a U-shaped groove.
[0010] Preferably, the surface of the root pile core is subjected to sandblasting or micro-arc oxidation treatment. Beneficial effects
[0011] This invention provides a metal 3D printed dental split-type pure titanium post core. Compared with the prior art, it has the following advantages:
[0012] 1. This metal 3D printed dental split-type pure titanium post and core, through the setting of insert plate and push plate, when screwing the crown post and core and the root post and core together, a hex wrench is inserted into the hexagonal hole and squeezes open the push plate. The push plate moves with the insert plate. After the root post and core and the crown post and core are screwed together, the insert plate and the socket are aligned. The hex wrench is removed. In this way, the compression spring pushes the push plate and insert plate to move. The insert plate is inserted into the socket, which can restrict the rotation of the crown post and core and prevent torsion during occlusion. In addition, by setting U-shaped groove, when occlusion occurs, the force can be evenly distributed to the U-shaped groove and the surrounding material, thereby reducing excessive local stress concentration and thus reducing occlusal stress concentration. Attached Figure Description
[0013] Figure 1 This is a schematic diagram of the structure of this utility model;
[0014] Figure 2 This is a cross-sectional structural diagram of the crown pile core of this utility model;
[0015] Figure 3 This is a schematic diagram of the root core structure in this utility model;
[0016] Figure 4 This is a schematic diagram of the structure of the crown pile core in this utility model.
[0017] In the diagram: 1. Crown core; 2. Root core; 3. Round block; 4. Insertion port; 5. Movable port; 6. Shoulder; 7. U-shaped groove; 8. Threaded groove; 9. Insert plate; 10. Push plate; 11. Compression spring; 12. Hexagonal hole; 13. Threaded block; 14. Round groove; 15. Slide groove. Detailed Implementation
[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0019] Please see Figures 1-4This utility model provides a technical solution: a metal 3D printed dental split-type pure titanium post core, including a root post core 2, a threaded block 13 integrally formed on the top of the root post core 2, a crown post core 1 above the root post core 2, a threaded groove 8 at the bottom of the crown post core 1, the threaded groove 8 and the threaded block 13 being screwed together, a circular groove 14 at the top of the threaded groove 8, two sliding grooves 15 on the outer side wall of the circular groove 14, an insert plate 9 being slidably connected inside the sliding groove 15, and the top of the threaded block 13 being fixed. There is a round block 3, and the top of the round block 3 has an insertion port 4. The outer side wall of the crown post 1 is integrally formed with a shoulder 6, which can lock the root post 2 and the crown post 1 tightly and prevent them from rotating or loosening. The top of the crown post 1 has a hexagonal hole 12, which facilitates the rotation of the crown post 1. The top edge of the shoulder 6 has a U-shaped groove 7, which has a buffering effect and can reduce the concentration of occlusal stress. The surface of the root post 2 is sandblasted or micro-arc anodized, which can form a micron-level roughness Ra 3-5μm, enhancing the bonding force with the dentin adhesive.
[0020] Furthermore, the upper surface of the inner side of the slide 15 is provided with a movable opening 5, the top of the movable opening 5 is connected to the hexagonal hole 12, and the top of the insert plate 9 is fixed with a push plate 10, so that the insert plate 9 can be moved out of the circular block 3. When rotating, the insert plate 9 will not block the rotation. The movable opening 5 is fixed with a compression spring 11, and the other end of the compression spring 11 is fixedly connected to the push plate 10.
[0021] During the procedure, based on the patient's oral CBCT or intraoral scan data, the root canal and crown morphology are reconstructed using 3D modeling software such as Geomagic to generate a digital model of the split post and core. Selective laser melting (SLM) technology is then used to 3D print pure titanium posts and cores of Grade 4 or Grade 5. 5. Titanium alloy, printing layer thickness ≤30μm. After printing, first screw the crown core 1 and the root core 2 together. Then insert a hex wrench into the hexagonal hole 12. The hex wrench squeezes open the push plate 10, and the two push plates 10 separate. The push plate 10 moves with the insert plate 9. The insert plate 9 moves away from the top of the round block 3. Rotate the hex wrench. The hex wrench rotates the crown core 1. After the root core 2 and the crown core 1 are screwed together, the insert plate 9 and the socket 4 are aligned. Remove the hex wrench. The push plate 10 is no longer obstructed. In this way, the compression spring 11 pushes the push plate 10 and the insert plate 9 to move. The insert plate 9 is inserted into the socket 4, which can limit the rotation of the crown core 1 and prevent torsion during engagement.
[0022] Furthermore, any content not described in detail in this specification is existing technology known to those skilled in the art.
[0023] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, the phrase "comprising an element defined as..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.
[0024] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A metal 3D printed dental split-type pure titanium post core, including a root post core (2), characterized in that: The top of the root core (2) is integrally formed with a threaded block (13), and a crown core (1) is provided above the root core (2). A threaded groove (8) is provided at the bottom of the crown core (1). The threaded groove (8) and the threaded block (13) are screwed together. A circular groove (14) is provided at the top of the threaded groove (8). Two sliding grooves (15) are provided on the outer side wall of the circular groove (14). An insert plate (9) is slidably connected inside the sliding groove (15). A circular block (3) is fixed at the top of the threaded block (13). An insertion port (4) is provided at the top of the circular block (3). A shoulder platform (6) is integrally formed on the outer side wall of the crown core (1).
2. The metal 3D printed dental split-type pure titanium post core according to claim 1, characterized in that: The top of the crown core (1) is provided with a hexagonal hole (12).
3. The metal 3D printed dental split-type pure titanium post core according to claim 2, characterized in that: The upper inner surface of the slide (15) is provided with a movable opening (5), the top of the movable opening (5) is connected to the hexagonal hole (12), and the top of the insert plate (9) is fixed with a push plate (10).
4. The metal 3D printed dental split-type pure titanium post core according to claim 3, characterized in that: A compression spring (11) is fixed inside the movable port (5), and the other end of the compression spring (11) is fixedly connected to the push plate (10).
5. The metal 3D printed dental split-type pure titanium post core according to claim 4, characterized in that: The top edge of the shoulder (6) is provided with a U-shaped groove (7).
6. The metal 3D printed dental split-type pure titanium post core according to claim 5, characterized in that: The surface of the root core (2) is subjected to sandblasting or micro-arc oxidation treatment.