Forming sheet clamp and preparation method and preparation device thereof

Abstract

The invention discloses a forming sheet clamp and a preparation method and a preparation device thereof, and relates to the technical field of dental restoration instruments, and the forming sheet clamp mainly comprises an arch ring, a fixed chuck and a self-adaptive chuck; the two ends of the arch ring are each provided with one fixing chuck, the two fixing chucks are each provided with one self-adaptive chuck, each self-adaptive chuck has a softening phase and a hardening phase, when the self-adaptive chucks are in the softening phase, the self-adaptive chucks can be attached to a tooth body and copy the form of the tooth body, and when the self-adaptive chucks are in the hardening phase, the self-adaptive chucks can be attached to the tooth body; and when the self-adaptive chuck is in a hardening phase, the self-adaptive chuck can apply pressure to the forming piece under the action of the arch ring, so that the forming piece is attached to the tooth body. The preparation method and the preparation device of the forming sheet clamp are used for preparing the forming sheet clamp. The forming piece clamp can be more accurately matched with a tooth body, pressure can be applied to the forming piece, the forming piece is made to be attached to the tooth body to the maximum extent, and therefore accurate shaping and repairing can be achieved.

Description

Technical Field

[0001] This invention relates to the field of dental restorative instrument technology, and in particular to a shaped clip and its preparation method and apparatus. Background Technology

[0002] In dental resin restorations, especially in the restoration of Class II cavities on the proximal surfaces of molars (a common type of caries treatment, usually including proximal cavities of molars and premolars, occlusal cavities, buccal cavities, and lingual cavities, etc., which are located on the proximal surfaces of posterior teeth, resulting in limited visibility and greater operational difficulty), the close fit between the molded piece and the tooth to be restored is the core prerequisite for restoring the natural tooth shape and proximal function.

[0003] However, the clamps of traditional molded clips are designed according to standard dental models, and their shape is fixed and symmetrical, which cannot adapt to the complex differences in the shape of real teeth. For example, the anatomical shapes of the first, second and third molars of the upper and lower jaws are different (the lingual side of the first molar of the upper jaw often has a cusp), and the morphological differences of the mesial edge, distal edge, buccal ridge and lingual ridge of the molars are significant. The arched arrangement of the teeth results in the buccal abduction gap of the same tooth position being larger than the lingual abduction gap, which causes the fixed shape clamp to often only achieve unilateral fit.

[0004] Currently, although some preform clips are designed with replaceable clips, allowing for different sizes of clips to be selected to adapt to different teeth and ensure a close fit between the clip and the tooth, the shape and angle of these replaceable clips are usually fixed. When preform clips with fixed shapes and angles clamp teeth with different shapes and angles (especially in cases of irregular teeth or malocclusion), it is often difficult to achieve stable clamping of the teeth, let alone achieve precise fit between the preform clip and the tooth.

[0005] Therefore, a forming clip and its preparation method and apparatus are provided to solve the above-mentioned technical problems existing in the prior art. Summary of the Invention

[0006] The purpose of this invention is to provide a molding clip and its preparation method and apparatus to solve the problems existing in the prior art, so as to achieve a more precise fit with the tooth body, and to apply pressure to the molding clip and make the molding clip fit the tooth body to the maximum extent, thereby achieving precise shaping and restoration.

[0007] To achieve the above objectives, the present invention provides the following solution: This invention provides a forming sheet clip, comprising: Bow ring; A fixing clamp is provided at each end of the bow ring; An adaptive clamp is provided on each of the two fixed clamps. The adaptive clamp has a softening phase and a hardening phase. When the adaptive clamp is in the softening phase, it can fit with the tooth and replicate the shape of the tooth. When the adaptive clamp is in the hardening phase, it can apply pressure to the forming piece under the action of the arch ring and make the forming piece fit with the tooth.

[0008] Preferably, the adaptive chuck is made of a malleable material, which is a physical sensing material, a chemical sensing material, or a hybrid sensing material.

[0009] Preferably, the contact surface of the adaptive chuck that contacts the tooth is further provided with an incremental region.

[0010] Preferably, each of the fixed clamps is also provided with a clamping structure, which can clamp the neck of the tooth.

[0011] Preferably, the clamping structure includes a plurality of contact points arranged side by side in the horizontal direction at the bottom front end of the fixing clamp, and a V-shaped break groove is formed between adjacent contact points.

[0012] Preferably, both the upper and lower surfaces of the clamping structure are inclined surfaces.

[0013] Preferably, the clamping structure is integrally formed with the corresponding fixing clamp or is detachably connected.

[0014] Preferably, the bow ring is made of elastic metal, or the bow ring is made by injection molding.

[0015] Preferably, the outer surface of the bow ring is further covered with a protective sleeve, and the surface of the protective sleeve is provided with an anti-slip structure.

[0016] Preferably, the fixing clamp is made of rigid plastic, wherein the fixing clamp is connected to the bow ring by injection molding, and a limiting structure is provided at the connection position between the bow ring and the fixing clamp, the limiting structure being used to limit the fixing clamp. Alternatively, the fixing clamp is mechanically or adhesively connected to the bow ring.

[0017] Preferably, the limiting structure is a limiting piece, which is arranged around the connection position between the bow ring and the fixed clamp.

[0018] Preferably, the fixing clamp and the bow ring are integrally injection molded.

[0019] This invention also provides a method for preparing a shaped clip, which is used to prepare the shaped clip as described above, comprising the following steps: S1. Prepare the bow ring separately; S2. Assemble or injection mold a fixed clamp at each end of the bow ring, and assemble or injection mold an adaptive clamp on each of the two fixed clamps to prepare the shaped piece clamp. Alternatively, the adaptive chuck and the corresponding fixed chuck can be injection molded using a dissimilar material injection molding process. In this case, the preparation method of the molded clip mainly includes the following steps: S01. The adaptive chuck and the corresponding fixed chuck are injection molded using a dissimilar material injection molding process to form a chuck assembly; S02. Assemble one of the clamping assemblies at each end of the bow ring to prepare the shaped piece clamp; Alternatively, the bow ring and the fixing clamp can be integrally injection molded. In this case, the preparation method of the molded clamp mainly includes the following steps: S001. The bow ring and the two fixing clamps are integrally injection molded; S002. Assemble or injection mold an adaptive clamp on each of the two fixed clamps to prepare the shaped sheet clamp.

[0020] Preferably, before step S2, the method further includes the following step: S101. A limiting structure is machined at the connection position between the bow ring and the fixed clamp.

[0021] The present invention also provides a device for preparing a shaped sheet clip, for preparing the shaped sheet clip as described above, comprising: A bow ring manufacturing apparatus, the bow ring manufacturing apparatus comprising a first injection mold, wherein the bow ring is injection molded through the first injection mold; or, the bow ring manufacturing apparatus comprising a machining apparatus, wherein the bow ring is machined through the machining apparatus. A fixed chuck preparation device includes a second injection mold, wherein the fixed chuck is injection molded through the second injection mold; or, the connection position of the bow ring and the fixed chuck forms a first assembly with the fixed chuck, and the first assembly is injection molded through the second injection mold. An adaptive chuck preparation device, the adaptive chuck preparation device including a forming mold, the adaptive chuck being formed by the forming mold; Alternatively, the adaptive chuck and the fixed chuck can be injection molded using a dissimilar material injection molding process. In this case, the fabrication apparatus for the molded clip includes: A chuck preparation device includes a chuck injection mold, wherein the adaptive chuck and the corresponding fixed chuck are combined to form a chuck assembly, and the chuck assembly is injection molded by the chuck injection mold; A bow ring manufacturing apparatus, the bow ring manufacturing apparatus comprising a first injection mold, wherein the bow ring is injection molded through the first injection mold; or, the bow ring manufacturing apparatus comprising a machining apparatus, wherein the bow ring is machined through the machining apparatus. Alternatively, the bow ring and the fixing clamp can be integrally injection molded. In this case, the preparation device for the molded clip includes: A main body preparation device, the main body preparation device including a main body injection mold, the bow ring and the fixing clamp are combined to form a second assembly, the second assembly is injection molded by the main body injection mold; An adaptive chuck preparation device, comprising a forming mold, wherein the adaptive chuck is formed by means of the forming mold.

[0022] The present invention achieves the following technical effects compared to the prior art: The forming clip in this invention mainly includes an arch ring, fixed clamps, and adaptive clamps. The arch ring provides clamping force to the tooth, and each end of the arch ring is provided with a fixed clamp that can clamp the tooth and transmit the clamping force of the arch ring to the forming clip. Further, each of the two fixed clamps is provided with an adaptive clamp, which has a softening phase and a hardening phase. Before installing the forming clip, the adaptive clamp is in the softening phase, and then the forming clip is clamped onto the tooth so that the adaptive clamp can fit with the tooth and accurately replicate the shape of the tooth. Then the forming clip is removed, the forming clip is installed, and the forming clip with the adaptive clamp in the hardening phase (which can maintain the replicated shape and has high strength) is clamped onto the tooth so that the adaptive clamp can apply pressure to the forming clip under the action of the arch ring and make the forming clip fit with the tooth.

[0023] Traditional dental clip clamps are designed according to standard dental models, with fixed shapes and bilateral symmetry. This makes them unsuitable for adapting to the complex and varied morphologies of real teeth, resulting in unstable clamping and a lack of close contact between the clip and the tooth. In contrast, this invention incorporates an adaptive clamp on the fixed clamp. This adaptive clamp has a softening phase and a hardening phase. When the adaptive clamp is in the softening phase, it can conform to the tooth and accurately replicate its morphology (such as tilted, twisted, developmentally abnormal teeth, and complex and diverse anatomical features like mesial and distal margins, buccal and lingual ridges, cusps, and undercuts). When the adaptive clamp is in the hardening phase... When the molded piece is replicated, it can maintain its original shape and high strength, thus applying pressure to the molded piece under the action of the arch ring and making the molded piece conform to the tooth. Compared with traditional molded piece clips, the molded piece clip of this invention can achieve a more precise fit with the tooth and can apply pressure to the molded piece and make the molded piece conform to the tooth to the maximum extent. This enables precise shaping and restoration, avoiding the problems of poor fit and insufficient structural stability of traditional molded piece clips due to their fixed shape, which leads to the inability to stably hold the tooth and the molded piece not being able to fit tightly to the tooth, causing restoration defects and medical risks. Attached Figure Description

[0024] 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.

[0025] Figure 1 This is a schematic diagram of the forming clip structure in an embodiment of the present invention; Figure 2 This is a front view of the forming clip in an embodiment of the present invention; Figure 3 This is a schematic diagram of the back side of the forming sheet clamp in an embodiment of the present invention; Figure 4 This is a schematic diagram illustrating the arrangement of the clamping structure and the incremental region in an embodiment of the present invention.

[0026] In the diagram: 100-forming piece clamp, 1-bow ring, 101-first bow ring arm, 102-second bow ring arm, 2-protective sleeve, 3-fixed clamp, 301-first fixed clamp, 302-second fixed clamp, 4-adaptive clamp, 401-first adaptive clamp, 402-second adaptive clamp, 5-clamping structure, 501-V-shaped disconnect groove, 502-upper surface, 503-lower surface, 504-contact point, 6-incremental area. Detailed Implementation

[0027] 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.

[0028] The purpose of this invention is to provide a molding clip and its preparation method and apparatus to solve the problems existing in the prior art, so as to achieve a more precise fit with the tooth body, and to apply pressure to the molding clip and make the molding clip fit the tooth body to the maximum extent, thereby achieving precise shaping and restoration.

[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] Example 1 like Figures 1-4 As shown, this embodiment provides a forming clip 100, mainly including an arch ring 1, a fixed clip 3, and an adaptive clip 4. The arch ring 1 can provide clamping force to the tooth body. Each end of the arch ring 1 is provided with a fixed clip 3, which can clamp the tooth body and transmit the clamping force of the arch ring 1 to the forming clip. Further, each of the two fixed clips 3 is provided with an adaptive clip 4. The adaptive clip 4 has a softening phase and a hardening phase. Before installing the forming clip, the adaptive clip 4 is in the softening phase. Then, the forming clip 100 is clamped on the tooth body, so that the adaptive clip 4 can fit with the tooth body and accurately replicate the shape of the tooth body. Then, the forming clip 100 is removed, the forming clip is installed, and the forming clip 100 with the adaptive clip 4 in the hardening phase (which can maintain the replicated shape and has high strength) is clamped on the tooth body, so that the adaptive clip 4 can apply pressure to the forming clip under the action of the arch ring 1 and make the forming clip fit with the tooth body.

[0031] Traditional dental clip clamps are designed according to standard dental models, with fixed shapes and bilateral symmetry. This makes them unsuitable for adapting to the complex and varied morphologies of real teeth, resulting in unstable clamping and preventing the clip from adhering tightly to the tooth. In this embodiment, an adaptive clamp 4 is provided on the fixed clamp 3. The adaptive clamp 4 has a softening phase and a hardening phase. When the adaptive clamp 4 is in the softening phase, it can adhere to the tooth and accurately replicate its morphology (such as tilted, twisted, abnormally developed teeth, and complex and diverse anatomical features like mesial and distal margins, buccal and lingual ridges, cusps, and undercuts). When the adaptive clamp 4 is in the hardening phase... When the shape is replicated, it can maintain the original shape and has high strength, so that it can apply pressure to the shaping piece under the action of the arch ring 1 and make the shaping piece fit the tooth. Compared with the traditional shaping piece clamp, the shaping piece clamp 100 of this embodiment can achieve a more precise fit with the tooth and can apply pressure to the shaping piece and make the shaping piece fit the tooth to the maximum extent. This can achieve precise shaping and restoration, avoiding the problems of poor fit and insufficient structural stability of traditional shaping piece clamps due to fixed shape, which leads to the inability to stably clamp the tooth and cause the shaping piece to not fit tightly with the tooth, resulting in restoration defects and medical risks.

[0032] In this embodiment, the adaptive chuck 4 is made of a malleable material, wherein the malleable material can be a physical sensing material, and the physical sensing material (phase transition without chemical bond change) can be: Thermosensitive materials, such as polycaprolactone (PCL), can enhance the mobility of molecular chain segments and destroy crystalline regions by heating to the melting temperature (60~70℃) to obtain a deformable softened phase, which can then be cooled and recrystallized to form a sturdy hardened phase. Alternatively, magnetosensitive materials, such as biodegradable magnetic polylactic acid (PLA-Fe3O4), can achieve a softened phase by controlling the glass transition temperature through a magnetic field, and a hardened phase by controlling and cooling through a magnetic field.

[0033] Alternatively, in this embodiment, the plastic material can also be a chemisensitive material (phase change depends on the formation / breaking of chemical bonds), wherein the chemisensitive material can be: Photopolymerizable materials, such as dental epoxy acrylate-polyurethane hybrid light-curing resin (EA-PUAHybrid Resin), initially have a softened phase. A chain polymerization reaction is triggered by a photoinitiator absorbing blue light of a specific wavelength (e.g., 360~490nm) to obtain a hardened phase. The photoinitiator can be, for example, camphorquinone or acylphosphine oxide. Acid-base reactive materials, such as glass ionomer cement (GIC), have an initial phase that is a two-component mixture consisting of a powder phase and a liquid phase. Manual mixing of the powder and liquid phases results in a softened, malleable phase. During mixing, the polyacrylic acid in the liquid dissociates into hydrogen (H₂O). + Erosion of glass powder (containing Ca) 2+ / Al 3+ Fluoroaluminosilicates release metal ions, which then react with carboxylate ions (-COO-). - The cross-linked polycarboxylate network is formed by the combination of these components to obtain the hardened phase. Redox materials, such as disulfide-crosslinked polyethylene glycol (PEG)-polycaprolactone (PCL) copolymer systems, have an initial phase of a linear copolymer containing free thiol groups (-SH) (softening phase, plastic state). By exposing the material to oxygen or contacting it with a low concentration of oxidation trigger (such as 0.05~0.1% H2O2 solution, which can be applied locally in clinical practice via a micro-spray), the thiol groups are oxidized to form disulfide bonds (-SS-) covalently crosslinked, resulting in a hardened phase with a three-dimensional network structure. If morphology needs to be adjusted, glutathione (GSH, concentration 5~10 μmol / L) gel can be applied locally, reducing and breaking the disulfide bonds into free thiol groups, regaining the softened phase and plastic state, and then triggering disulfide bond crosslinking again through oxidation to solidify the hardened phase.

[0034] Alternatively, in this embodiment, the plastic material can also be a hybrid sensing material (possessing both physical and chemical change properties). The hybrid sensing material can be a dual-curing material, for example: 1. Alkasite dual-curing resin has an initial phase in the form of two components, including a powder phase and a liquid phase. After manually mixing the powder and liquid phases, a plastic and softened phase is formed. First, a photoinitiator absorbs blue light of a specific wavelength (360~490nm) to trigger double bond polymerization to form covalent bonds. Then, water penetration activates the glass filler to initiate ion diffusion, which accelerates the densification of the resin network. At the same time, residual free radicals continue to crosslink, optimizing the polymer density and obtaining the hardened phase. 2. Light-cured glass ionomer cement (RMGIC) has a two-component initial phase, consisting of a powder phase and a liquid phase. The powder and liquid phases are manually mixed to form a plastic, softened phase. The resin monomers are first polymerized by absorbing blue light of a specific wavelength (360~490nm) through a photoinitiator. At the same time, the polyacrylic acid and glass powder undergo a continuous acid-base reaction to generate a polycarboxylate cross-linked structure. The unreacted glass powder filler is physically arranged and densified in the resin matrix to obtain the hardened phase.

[0035] In this embodiment, the contact surface between the adaptive clamp 4 and the tooth is provided with an incremental region 6. As a preferred embodiment, the incremental region 6 gradually increases from the cervical region to the coronal region, and is generally designed to extend beyond the clamping structure 5. According to the anatomical structure of the tooth, the width difference (on one side) from the cervical region or marginal ridge to the highest point of the tooth shape on the same side is generally no more than 2 mm. The length of the incremental region 6 extending beyond the clamping structure 5 is preferably 0.3~2 mm, which can provide sufficient deformation for the shaping of the adaptive clamp 4.

[0036] In this embodiment, the adaptive chuck 4 and the corresponding fixed chuck 3 can be detachably connected. Specifically, the adaptive chuck 4 can be securely connected to the corresponding fixed chuck 3 using methods such as mortise and tenon joints, insertion, sleeve, or adhesive bonding. When the adaptive chuck 4 and the corresponding fixed chuck 3 are connected using mortise and tenon joints, mortise grooves can be provided on both sides of the fixed chuck 3, and a tenon can be provided at the rear end of the adaptive chuck 4 (the end closest to the fixed chuck 3). The tenon engages with the corresponding mortise groove to achieve the mortise and tenon connection. Alternatively, a tenon can be provided on the fixed chuck 3, while a mortise groove is provided on the adaptive chuck 4. When the adaptive chuck 4 and the corresponding fixed chuck 3 are connected using insertion, a limiting hole can be provided on the front end face of the fixed chuck 3, and a limiting block can be provided on the rear end face of the adaptive chuck 4. The limiting block inserts into the corresponding limiting hole to achieve the insertion connection. Alternatively, a limiting block can be provided on the front end face of the fixed chuck 3, and a limiting hole can be provided on the rear end face of the adaptive chuck 4. When the adaptive chuck 4 is connected to the corresponding fixed chuck 3 using a sleeve method, the rear end of the adaptive chuck 4 can wrap around the front end of the fixed chuck 3. When the adaptive chuck 4 is connected to the corresponding fixed chuck 3 using an adhesive method, the adaptive chuck 4 can be directly adhesive to the front end surface of the fixed chuck 3.

[0037] In this embodiment, when the adaptive chuck 4 is made of an irreversible phase change material, it can be designed for single use, thereby avoiding cross-infection and ensuring safety and hygiene; when the adaptive chuck 4 is made of a reversible phase memory material (such as the thermosensitive material or redox material mentioned above), it can be designed for multiple use, and can be reused after disinfection, reducing costs.

[0038] Alternatively, the adaptive chuck 4 and the corresponding fixed chuck 3 can be an integral structure, and the two can be connected by injection molding or other connection methods. When the adaptive chuck 4 needs to be replaced, the adaptive chuck 4 and the corresponding fixed chuck 3 can be replaced as a whole.

[0039] In this embodiment, as Figure 2As shown, the bow ring 1 is preferably a C-shaped structure. It should be noted that the C-shaped structure here can be a standard C-shaped structure, or it can be a C-like structure, that is, other bending structures can be set in the C-shaped structure; or, other structures of bow ring 1 can be selected, such as an n-shaped bow ring 1.

[0040] Furthermore, the bow ring 1 can be made of an elastic metal, such as a nickel-titanium shape memory alloy or other highly elastic shape memory alloys (e.g., copper-based shape memory alloys or iron-based shape memory alloys). Moreover, as a preferred embodiment, the bow ring 1 has a continuous circular arc symmetrical structure with full curvature transition (i.e., the two curved surfaces are not only continuous in position and tangential direction at the connection, but also in curvature). Its mechanical properties are stable, and the stress distribution and elastic potential energy release are uniform, which can reduce the risk of fracture caused by stress concentration. It can also release elastic potential energy synchronously. In the clamping state, a stable and gentle clamping force can be applied to the tooth body through the fixed clamps 3 and the adaptive clamps 4 at both ends.

[0041] Alternatively, the bow ring 1 can be made of other materials depending on the specific working requirements. For example, it can be made of rigid plastics, such as medical-grade PPSU (Polyphenylene sulfone resins) or PEEK (polyether ether ketone). In this case, the bow ring 1 can be made using injection molding.

[0042] Furthermore, the bow ring 1 mainly includes a central arc segment. One end of the central arc segment is connected to a first bow ring arm 101, and the other end is connected to a second bow ring arm 102. A fixed clamp 3 is provided at the end of the first bow ring arm 101 away from the central arc segment and at the end of the second bow ring arm 102 away from the central arc segment. The fixed clamp 3 provided on the first bow ring arm 101 is the first fixed clamp 301, and the adaptive clamp 4 provided on the first fixed clamp 301 is the first adaptive clamp 401. The fixed clamp 3 provided on the second bow ring arm 102 is the second fixed clamp 302, and the adaptive clamp 4 provided on the second fixed clamp 302 is the second adaptive clamp 402.

[0043] In this embodiment, the outer surface of the arch ring 1 is also covered with a protective sleeve 2. The protective sleeve 2 is preferably made of medical soft rubber and is injection molded onto the middle arc segment of the arch ring 1. It can act as a buffer when the arch ring 1 breaks, and at the same time prevent the arch ring 1 from directly contacting the tooth and causing irritation. Alternatively, the protective sleeve 2 and the arch ring 1 can also be a separate structure, with the protective sleeve 2 being fitted onto the arch ring 1. Furthermore, the surface of the protective sleeve 2 is provided with an anti-slip structure, preferably a micro-textured structure, which can act as an anti-slip when picking up the molded clip 100, increasing the convenience and safety of operation.

[0044] As a preferred embodiment, the medical soft rubber used in the protective sleeve 2 is silicone rubber with a Shore hardness of 30~40A and a thickness of 0.5~1mm, which does not affect the clamping force output of the bow ring 1.

[0045] In this embodiment, the design clamping force of the arch ring 1 is preferably 5~20N, which can balance the clamping effectiveness and safety. This avoids the situation where the design clamping force of the arch ring 1 is less than 5N, so that the arch ring 1 cannot provide enough clamping force to achieve stable clamping, and when the design clamping force of the arch ring 1 is greater than 20N, it is easy to cause excessive tooth separation, resulting in damage to the periodontal ligament, or due to excessive clamping force, the condition of the cracked tooth is aggravated.

[0046] Furthermore, it should be noted that the clamping force of the bow ring 1 can be provided by itself; or, the bow ring 1 can also adopt a split structure, including a first half bow ring and a second half bow ring. The first end of the first half bow ring and the second half bow ring are each connected to a fixed clamp 3. The second ends of the first half bow ring and the second half bow ring are connected by elastic elements such as springs. The first half bow ring and the second half bow ring are connected to an adjustment device. The adjustment device can adjust the distance between the first half bow ring and the second half bow ring, thereby adjusting the clamping force generated by the bow ring 1.

[0047] In a preferred embodiment, the adjusting device may include a screw and a guide rail. The screw is a bidirectional screw, parallel to the guide rail, and both ends of the bidirectional screw are rotatably mounted on the guide rail via screw support seats. The first and second semi-circular rings are threadedly connected to the two ends of the bidirectional screw via connecting blocks, which are slidably disposed on the guide rail. At least one end of the bidirectional screw is connected to a knob. By rotating the bidirectional screw via the knob, the first and second semi-circular rings can be moved along the guide rail, moving closer to or further apart from each other. This allows adjustment of the distance between the first and second semi-circular rings to regulate the clamping force generated by the arch ring 1, meeting the needs of different cases.

[0048] Alternatively, the screw can also be a one-way screw. In this case, one of the first and second half-bow rings is rotatably connected to the one-way screw and fixed on the guide rail, while the other is threadedly connected to the one-way screw through a connecting block and slidably set on the guide rail.

[0049] Alternatively, other adjustment devices that meet the requirements can be selected as needed, which will not be elaborated in this embodiment.

[0050] In this embodiment, the fixing clamp 3 is preferably made of rigid plastic and can be connected to the bow ring 1 by injection molding. A limiting structure is also provided at the connection position between the bow ring 1 and the fixing clamp 3. The limiting structure protrudes from the side wall of the bow ring 1 to limit the fixing clamp 3. The limiting structure can be a limiting piece, arranged around the connection position between the bow ring 1 and the fixing clamp 3. Specifically, the limiting piece can be circular, square, or irregularly shaped (with a diameter or width 0.3~1mm larger than the bow ring 1) to increase the injection molding contact area and prevent the fixing clamp 3 from slipping. Alternatively, other limiting structures can be selected as needed, such as limiting blocks. There can be one limiting block or multiple limiting blocks arranged around the connection position between the bow ring 1 and the fixing clamp 3.

[0051] Alternatively, the limiting structure can be a recessed structure set on the side wall of the bow ring 1. For example, the limiting structure can be a rectangular, regular polygonal or other shaped limiting groove, and there can be one limiting groove or multiple limiting grooves set around the connection position between the bow ring 1 and the fixed clamp 3. When there is one limiting groove, it can be an annular groove set around the connection position between the bow ring 1 and the fixed clamp 3.

[0052] As a preferred embodiment, the rigid plastic used in the fixing clamp 3 can be medical-grade PPSU or PEEK material, whose elastic modulus (2~4GPa) is much lower than that of metal (such as stainless steel about 200GPa), reducing mechanical stimulation when in contact with the tooth and reducing the risk of enamel damage; moreover, during injection molding, the limiting structure at the end of the arch ring 1 is embedded in the rigid plastic to form a "mechanical lock", which can keep it from slipping out during long-term use.

[0053] It should be further explained that the bow ring 1 and the fixed clamp 3 can also be connected in other ways as needed, such as mechanical connection methods such as inlay, plug-in, or adhesive connection. In the inlay connection method, corresponding tenons and mortises are respectively set on the bow ring 1 and the fixed clamp 3, and the tenons are inserted into the corresponding mortises to achieve the connection. In the plug-in connection method, corresponding plug blocks and slots are respectively set on the bow ring 1 and the fixed clamp 3, and the plug blocks are inserted into the corresponding slots to achieve the connection. In the adhesive connection method, the fixed clamp 3 is directly glued to the bow ring 1. The above connection methods are all mature existing technologies in this field, and will not be described in detail in this embodiment.

[0054] Alternatively, when the bow ring 1 is also made of rigid plastic, the bow ring 1 and the fixing clamp 3 can be integrally injection molded.

[0055] In this embodiment, the fixing clamp 3 can also be made of other materials, such as metal. In this case, the bow ring 1 and the fixing clamp 3 can be connected by inlay, insertion or bonding.

[0056] In this embodiment, each fixed clamp 3 is also provided with a clamping structure 5. When the adaptive clamp 4 is passively shaped, it can clamp the cervical region of the tooth and appropriately restrict the adaptive clamp 4 to prevent it from being excessively squeezed and causing unnecessary deformation. It can also increase the clamping stability of the forming piece clamp 100. Moreover, when the clamping structure 5 contacts the cervical region of the tooth, it can undergo slight deformation according to the shape of the tooth, making it more in line with the shape of the cervical region of the tooth. At the same time, it transmits the gentle clamping force of the arch ring 1 to the cervical region of the tooth to perform the clamping action (by utilizing the anatomical structure of the cervical region of the tooth with different degrees of narrowing) to achieve stable clamping.

[0057] In a preferred embodiment, the clamping structure 5 includes a plurality of contact points 504 arranged side by side in the horizontal direction at the bottom front end of the fixed clamp 3 to achieve multi-point clamping; wherein, the contact points 504 extend beyond the fixed clamp 3 in the direction toward the tooth body, and the contact points 504 extend upward from the bottom of the fixed clamp 3 along the axial direction of the tooth body.

[0058] In this embodiment, a V-shaped break groove 501 is formed between adjacent contact points 504. The V-shaped break groove 501 has a certain angle on both sides. As a preferred embodiment, the angle on both sides of the V-shaped break groove 501 is set to 60°~150° (other angles can also be selected as needed). This allows the clamping structure 5 to present a pyramid-shaped structure with a larger rear and a smaller front (the side closer to the fixed clamp 3 is "rear", and the side in contact with the tooth is "front"). While ensuring high structural strength, the total contact area between the clamping structure 5 and the tooth is reduced, thereby strengthening the single-point contact pressure and efficiently transmitting the reinforced arch ring 1 clamping force to the cervical region of the tooth. Even under the same arch ring clamping force as the traditional forming clip, more stable clamping can be achieved.

[0059] Furthermore, both the upper surface 502 and the lower surface 503 of the clamping structure 5 are preferably inclined surfaces. The inclination angle of the upper surface 502 of the clamping structure 5 is 0~15°, and the inclination angle of the lower surface 503 is 0~45° (with the occlusal surface of the tooth as a reference). The inclination angle of the upper surface 502 of the clamping structure 5 is ≤15°, which can avoid excessive positive pressure between the clamping structure 5 and the cervical region of the tooth, thus preventing tissue damage. The inclination angle of the lower surface 503 is ≤45°, which can ensure that the clamping force is transmitted downward along the tooth axis (rather than slipping upward), so that the contact position between the forming clip 100 and the tooth is moved upward. The two work together to achieve the mechanical effect of guiding the clamping force downward and ensuring safe and controllable contact force, reducing the structural deformation and slippage problems caused by the traditional forming clip being located at the bottom of the clip, and making the clamping more stable.

[0060] In this embodiment, the clamping structure 5 is provided with multiple contact points 504. Due to the increase in contact points 504, it is more adaptable to complex tooth structures and increases stability. Moreover, the above-mentioned multi-point contact structure also increases the deformation capability of the clamping structure 5. Through the clamping force continuously applied by the arch ring 1, each contact point 504 can be independently and passively adjusted to a certain extent according to the shape of the tooth neck, so that it fits the tooth neck shape better. It can achieve independent fitting for teeth with standard arc shape and non-standard arc shape, compensate for shape errors, and ensure contact effectiveness.

[0061] Furthermore, it should be noted that the clamping structure 5 and the fixing clamp 3 can be integrally molded. In this case, the materials of the clamping structure 5 and the fixing clamp 3 can be the same, for example, both being rigid plastic. Alternatively, the clamping structure 5 and the fixing clamp 3 can be separate components, with the clamping structure detachably mounted on the fixing clamp 3. In this case, the materials of the clamping structure 5 and the fixing clamp 3 can also be the same, both being rigid plastic. Or, the materials of the clamping structure 5 and the fixing clamp 3 can also be different; for example, the fixing clamp 3 can be made of metal, while the clamping structure 5 can be made of rigid plastic. In this embodiment, the clamping structure 5 and the fixing clamp 3 are detachably connected, allowing for the replacement of different clamping structures 5 as needed to meet personalized adaptation requirements.

[0062] The detachable connection method of the clamping structure 5 and the fixed clamp 3 can be selected according to specific work needs. For example, multiple buckles can be arranged side by side at the bottom front end of the fixed clamp 3, and multiple slots can be arranged at the rear end of the clamping structure 5. The clamping structure 5 and the fixed clamp 3 can be detachably connected by the buckles being inserted into the corresponding slots.

[0063] Alternatively, the clamping structure 5 and the fixing clamp 3 can be connected by mortise and tenon joints, plug-in joints, or adhesive joints.

[0064] The application method of the forming clip 100 in this embodiment is as follows: 1. Tooth separation procedure: Insert a wedge between the tooth to be restored and the adjacent teeth to compensate for the thickness of the restorative molding sheet; 2: Assemble the adaptive chuck 4: Securely connect the first adaptive chuck 401 and the second adaptive chuck 402 to the first fixed chuck 301 and the second fixed chuck 302 respectively through tenon and mortise joints, insertion, sleeve or adhesive bonding, etc. 3: Trigger the softening phase of the adaptive chuck 4: Select physical (such as heating, magnetization, etc.), chemical (such as light, acid-base reaction, oxygenation, etc.), or mixed (both physical and chemical) means to trigger the softening phase of the adaptive chuck 4 according to the material type, so that it has plasticity (if the initial phase of the adaptive chuck 4 is the softening phase, then ignore this step). 4. Tooth Shaping: The adaptive clamp 4 is held in place by the forming clip 100 in the softened phase at the position of the tooth to be restored before preparation. The arch ring 1 applies a gentle clamping force to the tooth. Due to the incremental area 6 set on the contact surface, the adaptive clamp 4 can fully conform to the tooth and generate sufficient deformation, thereby achieving passive shaping and accurately replicating the anatomical shape of the tooth to be restored (the clamping structure 5 of the fixed clamp 3 can maintain clamping stability and appropriately restrict the adaptive clamp 4 to avoid excessive compression). 5: Triggering the hardening phase of the adaptive chuck 4: Select physical (such as heating, magnetization, etc.), chemical (such as light, acid-base reaction, oxygenation, etc.), or mixed (both physical and chemical) methods according to the material type to make the adaptive chuck 4 enter the hardening phase, thereby shaping the adaptive chuck 4 that has replicated the tooth morphology. 6: Tooth preparation: Remove the shaping clip 100 and perform routine caries removal and tooth preparation procedures on the tooth to be restored; 7: Restoration and Fitting: Insert the molding piece between the tooth to be restored and the adjacent tooth, and then clamp the molding piece clamp 100 corresponding to the self-adaptive clamp 4 in the hardened phase, which replicates the tooth shape, at the position of the tooth to be restored. The self-adaptive clamp 4 can tightly fit the molding piece to the remaining tooth through the replicated tooth shape, assisting in the completion of resin filling restoration. After use, the bow ring 1 and the fixing clamp 3 can be reused after being sterilized by high temperature and high pressure or chemically disinfected. A new disposable adaptive clamp 4 can be replaced, or the reusable adaptive clamp 4 can be subjected to reverse phase change and disinfected and reused after the shape is restored.

[0065] Example 2 In this embodiment, the adaptive chuck 4 of the forming sheet clamp 100 is a thermally sensitive adaptive chuck, and the application method of the forming sheet clamp 100 is as follows: Tooth separation procedure: Select a medical wedge of appropriate size according to the case and insert the wedge between the tooth to be restored and the adjacent tooth to compensate for the thickness of the subsequent shaping piece (the commonly used thickness is generally in the range of 0.018~0.05mm, which needs to be selected according to the case). Component assembly: The first adaptive clamp 401 and the second adaptive clamp 402, made of thermosensitive polymer material, are connected to the first fixed clamp 301 and the second fixed clamp 302 respectively through a tenon and mortise structure, and the connection is confirmed to be firm; Triggering the softening phase: Immerse the assembled forming clip 100 in a constant temperature water bath at 60~70℃. After 30~60 seconds, observe that the adaptive clip 4 is in a semi-transparent crystalline molten state (indicating that the adaptive clip 4 has entered the plastic softening phase). Remove the forming clip 100 from the water bath. Tooth shaping: Select a suitable holding instrument (usually a dental shaping clip) and open the arch ring 1 of the shaping clip 100 (confirm that the adaptive clamp 4 has cooled to about 50~55℃, which can maintain the softened phase and avoid patient discomfort). Adjust the distance between the first fixed clamp 301 and the second fixed clamp 302 to an appropriate distance. Move the shaping clip 100 between the tooth to be restored and the adjacent tooth. When the bottom of the shaping clip 100 is above the gingival margin, you can start to slowly release the holding instrument (usually a dental shaping clip). At this time, the incremental area 6 of the adaptive clamp 4, which is in the malleable softened phase, first begins to contact the tooth and produce initial deformation. At the same time, the clamping of the shaping clip 100... The clasp 5 makes partial contact with the tooth body, and the shaping clip 100 is slid along the tooth body toward the cervical region (this operation avoids damage to soft tissue) until the clasp 5 pushes away the gingival margin and the bottom of the clasp 5 is close to the bottom of the gingival sulcus. At this time, the holding instrument (usually a dental shaping clip forceps) is completely released and withdrawn. The arch ring 1 begins to apply a gentle clamping force of 5~20N to the tooth body. As the clamping force of the arch ring 1 is continuously transmitted, the clasp 5 makes full contact with the cervical region and performs the clamping action. At this time, the adaptive clamp 4 in the softening phase has fully conformed to and replicated the tooth morphology (such as tilted, twisted, developmentally abnormal teeth and complex and diverse anatomical morphologies such as mesial margin, distal margin, buccal ridge, lingual ridge, cusp, and undercuts), completing passive shaping; Triggering the hardening phase: After holding the clamp for 0.5 to 2 minutes, allow it to cool naturally, or blow air evenly with a dental three-way gun for 10 to 30 seconds. Observe that the adaptive clamp 4 changes to an opaque rigid state (hardening phase). Use a holding instrument (usually a dental shaping clamp) to gently remove the shaped shaping clamp 100. Tooth preparation: Tooth preparation is performed according to standard procedures; Restorative occlusion: Insert the appropriate shaping piece between the tooth to be restored and the adjacent teeth, adjusting its position to cover the cavity; re-clamp the shaped shaping piece clip 100, and the adaptive clamp 4, through its replicated shape, tightly presses the shaping piece onto the remaining tooth for conventional resin restoration. After restoration, remove the shaping piece clip 100 and the shaping piece, check for any overhangs, and adjust the occlusion with occlusal paper. If other teeth need restoration, the disposable adaptive clamp 4 can be replaced, or the reversible phase-change adaptive clamp 4 can be reversed and reused after its shape returns to its initial form.

[0066] Instrument preparation: After treatment, the bow ring 1 and the fixation clamp 3 are sterilized by high temperature and high pressure for later use; if the self-adaptive clamp 4 is a single-use type, it should be disposed of in accordance with the infectious waste in the medical waste standard; if the self-adaptive clamp 4 is a reusable type, it can be reverse phase-transformed and sterilized after the shape is restored for later use.

[0067] Example 3 In this embodiment, the adaptive chuck 4 of the forming sheet clamp 100 is a photosensitive adaptive chuck, and the application method of the forming sheet clamp 100 is as follows: Tooth separation procedure: Select a medical wedge of appropriate size according to the case and insert the wedge between the tooth to be restored and the adjacent tooth to compensate for the thickness of the subsequent shaping piece (the commonly used thickness is generally in the range of 0.018~0.05mm, which needs to be selected according to the case). Component assembly: The first adaptive clamp 401 and the second adaptive clamp 402, made of photosensitive polymer material, are connected to the first fixed clamp 301 and the second fixed clamp 302 respectively by the self-adhesion of the material. After confirming that the connection is firm, the initial phase of the adaptive clamp 4 is a plastic softened phase, and the next step can be carried out directly. Tooth shaping: Select a suitable holding instrument (generally a dental shaping clip) to open the arch ring 1 of the shaping clip 100. Adjust the distance between the first fixed clamp 301 and the second fixed clamp 302 to an appropriate distance. Move the shaping clip 100 between the tooth to be restored and the adjacent tooth. When the bottom of the shaping clip 100 is above the gingival margin, the holding instrument (generally a dental shaping clip) can be slowly released. At this time, the incremental region 6 of the adaptive clamp 4, which is in the plastic softening phase, first begins to contact the tooth and produce initial deformation. At the same time, the clamping structure 5 of the shaping clip 100 partially contacts the tooth. Move the shaping clip 100 along the tooth. Slide the clamp towards the cervical region of the tooth (this operation avoids damage to the soft tissue) until the clamping structure 5 pushes open the gingival margin and the bottom of the clamping structure 5 is close to the bottom of the gingival sulcus. At this point, completely release and withdraw the holding instrument (usually a dental shaping clip clamp). The arch ring 1 begins to apply a gentle clamping force of 5~20N to the tooth. As the clamping force of the arch ring 1 continues to be transmitted, the clamping structure 5 fully contacts the cervical region of the tooth and performs the clamping action. At this time, the adaptive clamp 4, which is in the softening phase, has fully conformed to and replicated the tooth morphology (such as tilted, twisted, developmentally abnormal teeth and complex and diverse anatomical morphologies such as mesial margin, distal margin, buccal ridge, lingual ridge, cusp, and undercuts), completing the passive shaping. Triggering the hardening phase: Use a dental light curing lamp (select the appropriate wavelength and light intensity range according to the material characteristics) to trigger the cross-linking reaction of the photosensitive polymer material, transforming the self-adaptive clamp 4 after shaping into the hardening phase, and gently remove the shaped clamp 100 using a holding instrument (usually a dental shaping clamp). Tooth preparation: Tooth preparation is performed according to standard procedures; Restorative occlusion: Insert the appropriate shaping piece between the tooth to be restored and the adjacent teeth, adjusting its position to cover the cavity; re-clamp the shaped shaping piece clip 100, and the adaptive clamp 4, through its replicated shape, tightly presses the shaping piece onto the remaining tooth for conventional resin restoration. After restoration, remove the shaping piece clip 100 and the shaping piece, check for any overhangs, and adjust the occlusion with occlusal paper. If other teeth need restoration, the disposable adaptive clamp 4 can be replaced, or the reversible phase-change adaptive clamp 4 can be reversed and reused after its shape returns to its initial form.

[0068] Instrument preparation: After treatment, the bow ring 1 and the fixation clamp 3 are sterilized by high temperature and high pressure for later use; if the self-adaptive clamp 4 is a single-use type, it should be disposed of in accordance with the infectious waste in the medical waste standard; if the self-adaptive clamp 4 is a reusable type, it can be reverse phase-transformed and sterilized after the shape is restored for later use.

[0069] Example 4 This embodiment provides a method for preparing a shaped sheet clip 100, which is used to prepare the shaped sheet clip 100 in Embodiment 1, and mainly includes the following steps: S1. Prepare bow ring 1 separately; S2. Assemble or injection mold a fixed clamp 3 at each end of the bow ring 1, and assemble or injection mold an adaptive clamp 4 on each of the two fixed clamps 3 to prepare the shaped piece clamp 100.

[0070] Alternatively, the adaptive chuck 4 and the corresponding fixed chuck 3 can be injection molded using a dissimilar material injection molding process. In this case, the preparation method of the molded clip 100 mainly includes the following steps: S01. The adaptive chuck 4 and the corresponding fixed chuck 3 are injection molded using a dissimilar material injection molding process to form a chuck assembly; S02. A clamp assembly is assembled at each end of the bow ring 1 to prepare the shaped piece clamp 100.

[0071] It should be noted that the dissimilar material injection molding process used for the injection molding between the adaptive chuck 4 and the fixed chuck 3 is a well-known technology, and will not be described in detail in this embodiment.

[0072] Alternatively, when the bow ring 1 and the fixing clamp 3 are made of rigid plastic, the bow ring 1 and the fixing clamp 3 can also be integrally injection molded. In this case, the preparation method of the molded clip 100 mainly includes the following steps: S001. The bow ring 1 and the two fixing clamps 3 are integrally injection molded; S002. Assemble or injection mold an adaptive clamp 4 on each of the two fixed clamps 3 to prepare the shaped sheet clamp 100.

[0073] In this embodiment, before step S2, the following step is also included: S101. A limiting structure is machined at the connection position between the bow ring 1 and the fixed clamp 3 to limit the fixed clamp 3.

[0074] In this embodiment, step S1, the preparation of the bow ring 1 mainly includes the following steps: S11. Prepare raw materials; S12. Pretreatment: Pretreatment of the raw material of bow ring 1; S13. Molding: The raw material of the bow ring 1 is shaped to form the bow ring 1; S14. Final inspection and packaging.

[0075] It should be noted that the forming process of the bow ring 1 varies depending on the raw materials used. Specifically, when the bow ring 1 is made of elastic metal sheet, the forming process may include sheet cutting, final forming, heat treatment, and surface treatment. When the bow ring 1 is made of elastic metal wire, the forming process may include bending, partial stamping, heat treatment, and surface treatment. When the bow ring 1 is made of rigid plastic, the forming process may be injection molding.

[0076] In this embodiment, the fixing clamp 3 is preferably made of rigid plastic. In this case, it can be connected to the bow ring 1 by injection molding. That is, the position of the bow ring 1 to be connected to the fixing clamp 3 is placed in the second injection mold, and the raw material of the fixing clamp 3 is injected into the mold cavity of the second injection mold to directly form the fixing clamp 3 on the bow ring 1. Alternatively, the fixing clamp 3 can be injection molded first, and then connected to the bow ring 1 by inlay, insertion or bonding. Alternatively, when both the bow ring 1 and the fixing clamp 3 are made of rigid plastic, the bow ring 1 and the fixing clamp 3 can also be integrally injection molded.

[0077] In this embodiment, in step S1, the adaptive chuck 4 can be prepared to obtain an initial shape by injection molding or compression molding. For example, when the adaptive chuck 4 is made of a thermosensitive material, it can be injection molded by a molding die, that is, the granular thermoplastic material is heated to a molten state and then injected under high pressure into the third cavity formed by the molding die. After cooling and solidification, it is demolded to obtain an adaptive chuck 4 with a specific initial shape. Alternatively, when the adaptive chuck 4 is made of a two-component material such as alkali silicate dual-curing resin, it can be compression molded, that is, after mixing the powder phase and liquid phase material, when it is in the plastic period (softening phase), it is placed in the third cavity formed by the molding die and a certain pressure is applied to shape it into the desired initial shape.

[0078] In step S2, the adaptive chuck 4 can be firmly connected to the corresponding fixed chuck 3 by means of tenon, mortise and tenon, insertion, sleeve or adhesive, or the adaptive chuck 4 can also be injection molded to the corresponding fixed chuck 3.

[0079] Example 5 This embodiment describes the main steps of preparing the bow ring 1 in step S1 of Example 4. In this embodiment, the bow ring 1 is made of nickel-titanium shape memory alloy plate, and its preparation process mainly includes the following steps: S11. Prepare raw materials and select medical-grade nickel-titanium shape memory alloy plates that meet product requirements.

[0080] S12. Preprocessing may include the following steps: S121. Surface degreasing: Immerse the nickel-titanium shape memory alloy sheet in an alkaline degreasing agent (such as sodium hydroxide solution). After immersion, take it out and clean it to remove the oil stains remaining on the surface during stamping or storage. S122, Pickling to remove oxide layer: Dissolve the oxide film (TiO2) on the surface of nickel-titanium shape memory alloy plate by pickling solution (such as dilute nitric acid solution).

[0081] S13. Molding, mainly includes the following steps: S131. Cut the nickel-titanium shape memory alloy sheet into a flat blank of the bow ring 1 with a limiting structure; or, as needed, first prepare the nickel-titanium shape memory alloy sheet into a flat blank of the bow ring 1, and then obtain a more precise limiting structure (such as limiting holes, limiting grooves, etc.) through fine processing (such as precision engraving machine engraving, mirror EDM, etc.). If the bow ring 1 has a three-dimensional shape, it is usually formed by bending the flat blank into the final three-dimensional bow ring shape through multi-step progressive molding to achieve final molding. S132. Heat treatment, mainly including solution treatment and aging treatment.

[0082] S133. Surface treatment, which can be mainly carried out by sandblasting / shot blasting, pickling, electrolytic polishing, passivation or ultrasonic cleaning, to remove scratches and oxide layers, reduce surface roughness, and improve corrosion resistance and aesthetics.

[0083] S14. Final inspection and packaging: Conduct final inspection on the product, and package it after passing the inspection.

[0084] Alternatively, the bow ring 1 can also be made of nickel-titanium shape memory alloy wire (square or round wire). In this case, its preparation process mainly includes the following steps: S11. Prepare raw materials and select medical-grade nickel-titanium shape memory alloy wire that meets product requirements.

[0085] S12. Preprocessing, specifically including the following steps: S121, Stress Relief: The nickel-titanium shape memory alloy wire is placed in a box-type heat treatment furnace to eliminate residual stress in the wire and prevent breakage. S122. Surface pretreatment to remove slight oxide layers and surface oil stains.

[0086] S13. Molding, specifically including the following steps: S131, Bending and forming: Bending the straight nickel-titanium shape memory alloy wire into the final shape of the bow ring 1; The step S131 may be followed by the following steps: S1311, local stamping, which involves locally stamping the nickel-titanium shape memory alloy wire to make it locally expand and form an anti-detachment structure. S132. Heat treatment, mainly including solution treatment and aging treatment, etc. S133. Surface treatment, mainly using methods such as sandblasting / shot blasting, pickling, electropolishing, passivation, and ultrasonic cleaning, can remove heat treatment oxide scale and possible wire bending marks, thereby improving surface quality.

[0087] S14. Final inspection and packaging: Conduct final inspection on the product, and package it after passing the inspection.

[0088] Example 6 This embodiment provides a device for preparing a shaped clip 100, which is used to prepare the shaped clip 100 in Embodiment 1. It mainly includes a bow ring preparation device, a fixed clip preparation device, and an adaptive clip preparation device.

[0089] In this embodiment, the bow ring 1 is preferably made of elastic metal. In this case, the bow ring preparation device includes a machining device, and the bow ring 1 is formed by machining. Alternatively, the bow ring 1 can also be made of a rigid plastic or other injection-moldable material. In this case, the bow ring preparation device can include a first injection mold, and the bow ring 1 is injection molded by the first injection mold. The first injection mold can include a first upper injection mold and a first lower injection mold. After the first upper injection mold and the first lower injection mold are closed, a first mold cavity matching the shape of the bow ring 1 is formed. The raw material of the bow ring 1 is injected into the first mold cavity to perform injection molding of the bow ring 1.

[0090] In this embodiment, the fixing clamp 3 is preferably made of rigid plastic. In this case, the fixing clamp preparation device may include a second injection mold. The fixing clamp 3 is injection molded through the second injection mold. The second injection mold may include a second upper injection mold and a second lower injection mold. After the second upper injection mold and the second lower injection mold are closed, a second mold cavity is formed. The shape of the second mold cavity matches the shape of the fixing clamp 3. At this time, a separate fixing clamp 3 can be prepared, and then it can be connected to the bow ring 1 by means of inlaying, plugging or bonding. Alternatively, the connection position of the bow ring 1 and the fixing clamp 3 forms a first assembly with the fixing clamp 3. The shape of the second mold cavity matches the shape of the first assembly. In this case, the connection part of the bow ring 1 and the fixing clamp 3 is placed into the second mold cavity, and the raw material of the fixing clamp 3 is injected into the second mold cavity to directly injection mold the fixing clamp 3 onto the bow ring 1.

[0091] In this embodiment, the adaptive chuck preparation device may include a molding die. The adaptive chuck 4 is formed by the molding die (injection molding or compression molding, etc.). The molding die may include an upper molding die and a lower molding die. After the upper molding die and the lower molding die are closed, a third mold cavity that matches the shape of the adaptive chuck is formed.

[0092] Alternatively, the adaptive chuck 4 and the corresponding fixed chuck 3 can be injection molded using a dissimilar material injection molding process. In this case, the preparation device for the forming piece chuck 100 includes a chuck preparation device and a bow ring preparation device. The chuck preparation device includes a chuck injection mold. The adaptive chuck 4 and the corresponding fixed chuck 3 are combined to form a chuck assembly. The chuck assembly is injection molded using a chuck injection mold. The chuck injection mold can include an upper chuck injection mold and a lower chuck injection mold. After the upper chuck injection mold and the lower chuck injection mold are closed, a fifth mold cavity matching the shape of the chuck assembly is formed, which enables the injection molding of the adaptive chuck 4 and the corresponding fixed chuck 3. The bow ring preparation device is the same as described above.

[0093] Alternatively, the bow ring 1 and the fixed clamp 3 can be integrally injection molded. In this case, the preparation device for the forming piece clamp 100 includes a main body preparation device and an adaptive clamp preparation device. The main body preparation device includes a main injection mold. The bow ring 1 and the fixed clamp 3 are combined to form a second assembly. The second assembly is injection molded by the main injection mold. The main injection mold may include a main upper injection mold and a main lower injection mold. After the main upper injection mold and the main lower injection mold are closed, a fourth mold cavity matching the shape of the second assembly is formed, which can realize the integral injection molding of the bow ring 1 and the fixed clamp 3. The adaptive clamp preparation device adopts the adaptive clamp preparation device mentioned above.

[0094] Example 7 This embodiment describes the bow ring preparation device in Embodiment Six. In this embodiment, the bow ring 1 is made of nickel-titanium shape memory alloy sheet. At this time, the bow ring preparation device may include a machining device, which includes a cutting device and a bending device. The cutting device can cut the nickel-titanium shape memory alloy sheet into a planar blank of the bow ring 1 with a limiting structure. The cutting device may be a laser cutting machine, a wire cutting machine, or a CNC punching machine. The bending device is used to achieve the final forming of the bow ring 1, and it may be a bending machine or a pressure bending machine.

[0095] Furthermore, the machining equipment may also include precision machining equipment (such as precision engraving machines, mirror EDM machines, etc.) to obtain more precise limiting structures (such as limiting holes, limiting grooves, etc.).

[0096] Alternatively, the bow ring 1 can also be made of nickel-titanium shape memory alloy wire. In this case, the machining device includes a bending and forming device, which can be a CNC wire bending machine to bend the straight nickel-titanium shape memory alloy wire into the final shape of the bow ring 1; or it can be bent by hand.

[0097] In this embodiment, the machining device may also include a local stamping device, which may be a punch press (mechanical or hydraulic) to locally stamp the nickel-titanium shape memory alloy wire to locally expand it and form an anti-detachment structure.

[0098] Specific examples have been used to illustrate the principles and implementation methods of this invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of this invention. Furthermore, those skilled in the art will recognize that, based on the ideas of this invention, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of this invention.

Claims

1. A forming sheet clamp, characterized in that: include: Bow ring (1); Fixed clamp (3), each of the two ends of the bow ring (1) is provided with a fixed clamp (3); An adaptive clamp (4) is provided on each of the two fixed clamps (3). The adaptive clamp (4) has a softening phase and a hardening phase. When the adaptive clamp (4) is in the softening phase, it can fit with the tooth body and replicate the shape of the tooth body. When the adaptive clamp (4) is in the hardening phase, it can apply pressure to the forming piece under the action of the arch ring (1) and make the forming piece fit with the tooth body.

2. The forming sheet clamp according to claim 1, characterized in that: The adaptive chuck (4) is made of a malleable material, which is a physical sensing material, a chemical sensing material, or a mixed sensing material.

3. The forming sheet clamp according to claim 1, characterized in that: The adaptive chuck (4) has an incremental area (6) on its contact surface for contacting the tooth.

4. The forming sheet clamp according to claim 1, characterized in that: Each of the fixed clamps (3) is also provided with a clamping structure (5) which can clamp the neck of the tooth.

5. The forming sheet clamp according to claim 4, characterized in that: The clamping structure (5) includes a plurality of contact points (504) arranged side by side in the horizontal direction at the bottom front end of the fixed clamp (3), and a V-shaped break groove (501) is formed between adjacent contact points (504).

6. The forming sheet clamp according to claim 4, characterized in that: The upper surface (502) and lower surface (503) of the clamping structure (5) are both inclined surfaces.

7. The forming sheet clamp according to any one of claims 4 to 6, characterized in that: The clamping structure (5) and the corresponding fixing clamp (3) are integrally formed or detachably connected.

8. The forming sheet clamp according to claim 1, characterized in that: The bow ring (1) is made of elastic metal, or the bow ring (1) is made by injection molding.

9. The forming sheet clamp according to claim 1, characterized in that: The outer surface of the bow ring (1) is also covered with a protective sleeve (2), and the surface of the protective sleeve (2) is provided with an anti-slip structure.

10. The forming sheet clamp according to claim 1, characterized in that: The fixed clamp (3) is made of hard plastic. The fixed clamp (3) is connected to the bow ring (1) by injection molding. The connection position between the bow ring (1) and the fixed clamp (3) is also provided with a limiting structure, which is used to limit the fixed clamp (3). Alternatively, the fixing clamp (3) may be mechanically or adhesively connected to the bow ring (1).

11. The forming sheet clamp according to claim 10, characterized in that: The limiting structure is a limiting piece, which is arranged around the connection position between the bow ring (1) and the fixed clamp (3).

12. The forming sheet clamp according to claim 1, characterized in that: The fixed clamp (3) and the bow ring (1) are integrally injection molded.

13. A method for preparing a shaped sheet clip, characterized in that: The method for preparing the shaped sheet clip as described in any one of claims 1 to 11 comprises the following steps: S1. Prepare the bow ring (1) separately; S2. Assemble or injection mold a fixed clamp (3) at each end of the bow ring (1), and assemble or injection mold an adaptive clamp (4) on each of the two fixed clamps (3) to prepare the shaped piece clamp. Alternatively, the method for preparing the shaped sheet clip as described in any one of claims 1 to 9 comprises the following steps: S01. The adaptive chuck (4) and the corresponding fixed chuck (3) are injection molded using a dissimilar material injection molding process to form a chuck assembly; S02. A clamp assembly is assembled at each end of the bow ring (1) to prepare the shaped piece clamp; Alternatively, the method for preparing the shaped sheet clip as described in any one of claims 1-9, 12 includes the following steps: S001. The bow ring (1) and the two fixing clamps (3) are integrally injection molded; S002. Assemble or injection mold an adaptive clamp (4) on each of the two fixed clamps (3) to prepare the shaped sheet clamp.

14. The method for preparing the forming clip according to claim 13, characterized in that: Before step S2, the following step is also included: S101. A limiting structure is machined at the connection position between the bow ring (1) and the fixed clamp (3).

15. A device for preparing a shaped sheet clip, characterized in that: For preparing the shaped sheet clip as described in any one of claims 1 to 11, comprising: A bow ring preparation device, the bow ring preparation device including a first injection mold, the bow ring (1) being injection molded by the first injection mold; or, the bow ring preparation device including a machining device, the bow ring (1) being machined by the machining device; A fixed chuck preparation device, the fixed chuck preparation device includes a second injection mold, the fixed chuck (3) is injection molded by the second injection mold, or the connection position of the bow ring (1) and the fixed chuck (3) forms a first assembly with the fixed chuck (3), the first assembly is injection molded by the second injection mold; An adaptive chuck preparation device, the adaptive chuck preparation device including a forming mold, the adaptive chuck (4) being formed by the forming mold; Alternatively, the preparation of the shaped sheet clip as described in any one of claims 1 to 9 includes: A chuck preparation device, the chuck preparation device includes a chuck injection mold, the adaptive chuck (4) and the corresponding fixed chuck (3) are combined to form a chuck assembly, the chuck assembly is injection molded by the chuck injection mold; A bow ring preparation device, the bow ring preparation device including a first injection mold, the bow ring (1) being injection molded by the first injection mold; or, the bow ring preparation device including a machining device, the bow ring (1) being machined by the machining device; Alternatively, the method for preparing the shaped sheet clip as described in any one of claims 1 to 9, 12 includes: The main body preparation device includes a main body injection mold, the bow ring (1) and the fixing clamp (3) are combined to form a second assembly, and the second assembly is injection molded by the main body injection mold; An adaptive chuck preparation device, the adaptive chuck preparation device includes a forming mold, and the adaptive chuck (4) is formed by the forming mold.

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