Injection type temporary seal paste storage and application device

Abstract

The application provides an injection type temporary sealing paste storage and application device, and belongs to the technical field of oral cavity medical devices. The injection type temporary sealing paste storage and application device comprises a sealed storage module, a push module and a nozzle. The sealed storage module comprises an inner container for containing temporary sealing paste and an outer shell sleeved outside the inner container. The push module comprises a push rod penetrating the inner container. The push end of the push rod is provided with a piston matched with the inner wall of the inner container. The push rod is provided with a dose scale. The end of the inner container is provided with the nozzle in an arc structure. The injection type temporary sealing paste storage and application device provided by the application realizes sterile storage, accurate quantitative pushing and convenient application matched with the oral cavity anatomical structure of the temporary sealing paste through the cooperative design of the sealed double-layer structure of the inner container and the outer shell, the push rod with the dose scale and the arc nozzle.

Description

Technical Field

[0001] This application belongs to the field of oral medical device technology, specifically relating to an injectable temporary occlusive ointment storage and application device. Background Technology

[0002] In clinical dental treatment, temporary sealing paste is a key auxiliary material widely used in root canal treatment, cavity filling and other procedures. It is mainly used to temporarily seal tooth cavities, isolate external stimuli, prevent microleakage, and create a stable environment for subsequent treatment.

[0003] Traditional methods of applying temporary occlusive balms often rely on using a scoop to take the balm, manually mixing it, and then filling it, or using a simple plunger syringe for delivery. These methods have several limitations: firstly, manual operation makes it difficult to precisely control the amount of occlusive balm used, easily leading to insufficient filling or overflow, which not only affects the treatment outcome but may also increase the workload of secondary cleaning; secondly, the viscosity of temporary occlusive balms is quite sensitive to temperature, being high at room temperature, resulting in greater resistance during injection, requiring medical staff to apply considerable force, which can easily lead to finger fatigue over time, affecting the precision and stability of the procedure. These methods fail to meet the modern clinical demands for efficient, precise, and sterile oral treatment. Summary of the Invention

[0004] To address at least one of the technical problems existing in the background art, this application provides an injectable temporary occlusive ointment storage and application device. Through the coordinated design of a sealed double-layer structure of inner liner and outer shell, a push rod with dosage scale, and an arc-shaped nozzle, the device achieves sterile storage, precise quantitative delivery, and convenient application that conforms to the oral anatomy structure of the temporary occlusive ointment.

[0005] The technical solution adopted in this application is as follows: This application provides an injectable temporary occlusive ointment storage and application device, comprising: A sealed storage module includes an inner liner for holding a temporary sealing paste and an outer shell fitted over the inner liner. The push module includes a push rod inserted into the inner liner, the push end of the push rod being provided with a piston that fits against the inner wall of the inner liner, and the push rod being provided with a dosage scale; The inner liner is provided with a nozzle at its end, and the nozzle has an arc-shaped structure.

[0006] According to the injectable temporary sealing paste storage and application device provided in the embodiments of this application, the sealed storage module constructs a double-layer protection system of "inner liner + outer shell". The inner liner, as the container that directly contacts the temporary sealing paste, ensures the chemical stability of the paste, while the outer shell forms a physical barrier, effectively isolating external light, dust, and moisture, preventing the temporary sealing paste from changing its properties or becoming contaminated due to environmental factors during storage, thereby significantly extending the shelf life of the material and ensuring the sterility requirements for clinical use. During application, the push module uses a push rod inserted into the inner liner to drive the piston at its end to move. The tight fit between the piston and the inner wall of the inner liner not only ensures the sealing during injection, preventing backflow or leakage of the paste, but also ensures that the pushing force can be effectively converted into paste. The displacement of the nozzle, combined with the preset dosage scale on the push rod, allows medical staff to intuitively read and precisely control the amount of temporary sealing paste extruded. This avoids the waste caused by insufficient filling or overflow due to estimation by feel in traditional manual operations, greatly improving the accuracy of delicate operations such as root canal temporary sealing. In addition, the arc-shaped nozzle structure at the end of the inner tube is a special design for the oral treatment environment. Its curved shape avoids obstruction and interference from the corners of the patient's mouth, adjacent teeth, or buccal and lingual soft tissues, allowing the operator to deliver the temporary sealing paste precisely to the cavity of the affected tooth deep in the oral cavity at a comfortable angle. This solves the problem of limited field of vision and difficulty in alignment when operating in narrow spaces with straight nozzles, thus realizing the safe storage and precise and convenient application of temporary sealing paste.

[0007] According to one embodiment of this application, a vacuum interlayer is provided between the outer shell and the inner liner, and the force-applying end of the push rod is provided with a non-slip pressing handle; The non-slip press handle is embedded with a phase change energy storage ring, which absorbs hand temperature and conducts it to the inner liner to adjust the viscosity of the temporary sealing paste.

[0008] According to one embodiment of this application, a honeycomb hole structure is formed on the outer peripheral wall of the piston; The depth of the honeycomb structure ranges from 0.1 mm to 0.5 mm.

[0009] According to one embodiment of this application, the push rod is provided with a pawl groove, and the housing is provided with a pawl body that slides and engages with the pawl groove.

[0010] According to one embodiment of this application, the nozzle is covered with a transparent protective cover; The transparent shield blocks the nozzle outlet when there is no external pressure.

[0011] According to one embodiment of this application, a transparent observation window is provided on the side wall of the outer shell at a position corresponding to the inner liner, and the transparent observation window extends along the axial direction of the inner liner.

[0012] According to one embodiment of this application, the outlet diameter of the nozzle with the arc-shaped structure is 1.0 mm to 2.0 mm.

[0013] According to one embodiment of this application, a semi-enclosed safety shield is fitted on the bottom side of the end of the housing, and the length of the safety shield is greater than the length of the nozzle; The safety shield is slidably connected to the outer shell, and the edge of the safety shield has an arc transition structure. The side of the safety shield facing the oral cavity is provided with a guide groove, and the two sides of the safety shield are provided with baffles.

[0014] According to one embodiment of this application, the surface of the outer casing is coated with an ultraviolet blocking layer; The inner wall of the outer shell is provided with several axially extending reinforcing ribs corresponding to the position of the inner liner.

[0015] According to one embodiment of this application, the outer casing is further provided with a dose reset button; When the dose reset button is pressed, the engagement between the pawl body and the pawl groove is released, so that the push rod retracts to the initial position under external pulling force. Attached Figure Description

[0016] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings: Figure 1 This is a schematic diagram of the structure of the injectable temporary sealing paste storage and application device provided in the embodiments of this application; Figure 2 A schematic diagram of the inner liner structure of the injection-type temporary sealing paste storage and application device provided in the embodiments of this application; Figure 3 A schematic diagram of the push rod and piston structure of the injectable temporary sealing paste storage and application device provided in the embodiments of this application; Figure 4 A schematic diagram of the safety shield structure of the injectable temporary sealing paste storage and application device provided in the embodiments of this application; Figure 5 This is an exploded structural diagram of the injectable temporary sealing ointment storage and application device provided in the embodiments of this application.

[0017] in, 11. Inner liner; 12. Outer shell; 121. Pawl body; 122. Transparent observation window; 124. Dosage reset button; 13. Push rod; 132. Anti-slip press handle; 133. Pawl groove; 14. Piston; 141. Honeycomb structure; 15. Nozzle; 151. Transparent protective cover; 16. Safety cover; 161. Flow guide groove; 162. Baffle. Detailed Implementation

[0018] To more clearly illustrate the overall concept of this application, a detailed explanation is provided below with reference to the accompanying drawings.

[0019] Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application may also be implemented in other ways different from those described herein. Therefore, the scope of protection of this application is not limited to the specific embodiments disclosed below. It should be noted that, unless otherwise specified, the embodiments of this application and the features thereof can be combined with each other.

[0020] Furthermore, it should be understood in the description of this application that the terms "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0021] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0022] In this application, unless otherwise expressly specified and limited, the "above" or "below" of the second feature can mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. In the description of this specification, references to terms such as "an embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described can be combined in any suitable manner in one or more embodiments or examples.

[0023] like Figures 1 to 5 As shown, this application provides an injectable temporary sealing plaster storage and application device, comprising: The sealed storage module includes an inner liner 11 for holding temporary sealing paste, and an outer shell 12 fitted over the inner liner 11. The push module includes a push rod 13 that passes through the inner liner 11. The push end of the push rod 13 is provided with a piston 14 that fits against the inner wall of the inner liner 11. The push rod 13 is provided with a dosage scale. The inner liner 11 is provided with a nozzle 15 at its end, and the nozzle 15 has an arc-shaped structure.

[0024] The sealed storage module serves as the foundation for the drug liquid carrying and protection of the entire device. It includes an inner liner 11 for directly holding the temporary sealing balm, and an outer shell 12 tightly fitted around the inner liner 11. This double-layer nested structure not only provides a stable space for the balm, but also effectively isolates the temporary sealing balm in the inner liner 11 from contamination or property interference by the external environment through the physical enclosure of the outer shell 12.

[0025] In terms of ointment delivery control, the device is equipped with a push module, the core component of which is a push rod 13 that passes through the inner liner 11. The push end of the push rod 13 is equipped with a piston 14, which is in close contact with the inner wall of the inner liner 11, thereby forming a good sealed chamber during the injection process, ensuring that the push force can be efficiently converted into the directional discharge of the temporary sealing ointment. At the same time, the push rod 13 is clearly marked with dosage scale, providing an intuitive quantitative reference for clinical operation, which makes it easy for medical staff to accurately control the amount of temporary sealing ointment squeezed out.

[0026] In addition, in order to adapt to the complex and narrow operating environment inside the oral cavity, the end of the inner liner 11 is specially provided with a nozzle 15, which is designed with an arc-shaped structure. This morphological feature can effectively avoid the obstruction of the adjacent surfaces of teeth and soft tissues, so that the temporary sealing paste can be delivered more smoothly and accurately to the depth of the cavity of the affected tooth, greatly improving the convenience and accuracy of clinical application.

[0027] Furthermore, the injection dosage can be finely set to 0.1 ml per division, primarily based on the precise metrological requirements of micro-volume drug administration in oral clinical practice and the principles of fluid dynamics. In dental temporary sealing treatments, the amount of material required for cavity filling or root canal orifice sealing is usually extremely small. The 0.1 ml micro-step unit can translate each injection action into a precise and controllable dosage output, effectively avoiding paste overflow, waste, or contamination of surrounding healthy tissue caused by excessive single extrusion volume.

[0028] The main body of the device is kept within 12cm in length, with a maximum outer diameter of no more than 2.5cm, and the overall weight is kept below 50g. This compact size and light weight significantly reduce hand fatigue for medical staff during prolonged, delicate procedures. It also caters to the specific needs of pediatric dental treatment—in the confined space of a child's mouth, the small device can easily reach hard-to-access areas such as the posterior teeth, providing pediatric dentists with excellent operational visibility and flexibility, thereby effectively improving the child's cooperation and comfort during treatment.

[0029] According to the injectable temporary sealing paste storage and application device provided in the embodiments of this application, the sealed storage module constructs a double-layer protection system of "inner liner 11 + outer shell 12". The inner liner 11, as the container that directly contacts the temporary sealing paste, ensures the chemical stability of the paste, while the outer shell 12 forms a physical barrier, effectively isolating external light, dust, and moisture, preventing the temporary sealing paste from changing its properties or becoming contaminated due to environmental factors during storage, thereby significantly extending the shelf life of the material and ensuring the sterility requirements for clinical use. During application, the push module uses a push rod 13 inserted in the inner liner 11 to drive the piston 14 at its end to move. The tight fit between the piston 14 and the inner wall of the inner liner 11 not only ensures the sealing during injection, preventing backflow or leakage of the paste, but also ensures that the pushing force can be effectively applied. The displacement of the paste, combined with the preset dosage scale on the push rod 13, allows medical staff to intuitively read and precisely control the amount of temporary sealing paste extruded. This avoids the waste caused by insufficient filling or overflow due to estimation by feeling in traditional manual operations, greatly improving the accuracy of delicate operations such as root canal temporary sealing. In addition, the arc-shaped nozzle 15 structure at the end of the inner tube 11 is specially designed for the oral treatment environment. Its curved shape avoids obstruction and interference from the corners of the patient's mouth, adjacent teeth, or buccal and lingual soft tissues, allowing the operator to deliver the temporary sealing paste precisely to the cavity of the affected tooth deep in the oral cavity at a comfortable angle. This solves the problem of limited field of vision and difficulty in alignment when operating in narrow spaces with the straight nozzle 15. Thus, the temporary sealing paste is safely stored and can be applied accurately and conveniently.

[0030] like Figures 1 to 5 As shown, in some embodiments of this application, a vacuum interlayer is provided between the outer shell 12 and the inner liner 11, and the force-applying end of the push rod 13 is provided with a non-slip pressing handle 132. The non-slip press handle 132 is embedded with a phase change energy storage ring, which is used to absorb hand temperature and conduct it to the inner liner 11 to adjust the viscosity of the temporary sealing paste.

[0031] The vacuum interlayer between the outer shell 12 and the inner liner 11 utilizes the characteristic of a vacuum environment where there are almost no gas molecules to effectively cut off the pathways of heat conduction and convection. This physically isolates the temporary sealing paste inside the inner liner 11 from the external ambient temperature, preventing premature curing or deterioration of the paste due to fluctuations in external temperature and ensuring the stability of material properties. Meanwhile, the anti-slip pressing handle 132 at the force application end of the push rod 13 not only improves the grip stability of medical personnel during delicate operations by increasing the coefficient of friction and preventing hand slippage leading to excessive injection, but also incorporates a phase change energy storage ring. This ring utilizes the physical property of phase change materials absorbing or releasing a large amount of latent heat during a phase transition at a specific temperature. It efficiently absorbs the body heat from the medical personnel's hands and conducts it directionally to the interior of the inner liner 11, using heat energy to reduce the viscosity of the temporary sealing paste, increasing its fluidity and significantly reducing injection resistance. This makes the paste extruded more smoothly and evenly, effectively alleviating finger fatigue during prolonged continuous operation and improving the comfort and efficiency of the treatment process.

[0032] like Figure 3 As shown, in some embodiments of this application, a honeycomb hole structure 141 is formed on the outer peripheral wall of the piston 14; The depth of the honeycomb structure 141 ranges from 0.1 mm to 0.5 mm.

[0033] By forming a honeycomb structure 141 with a depth ranging from 0.1 mm to 0.5 mm on the outer peripheral wall of the piston 14, the sealing performance and injection feel of the device are significantly improved by utilizing the principles of microstructure mechanics. This honeycomb structure 141 forms a series of regularly arranged micro-oil reservoirs or elastic compensation units at the microscopic level. When the piston 14 slides within the inner liner 11, these tiny depressions can utilize surface tension to adsorb and store trace amounts of temporary sealing paste or lubricating medium, forming an extremely thin and stable fluid lubrication film between the piston 14 and the inner liner 11 wall. This transforms traditional dry or semi-dry friction into a mixed lubrication state, significantly reducing the coefficient of sliding friction and making the injection process smoother and easier.

[0034] Meanwhile, the honeycomb texture within this depth range gives the piston 14 a slight elastic deformation capability at its edge, enabling it to better adapt to minor processing errors or deformations that may exist on the inner wall of the inner liner 11, always maintaining a tight fit. This effectively prevents "liquid leakage" or backflow during high-pressure injection, and eliminates residual pressure in the pipeline by utilizing the negative pressure adsorption effect of the micropores at the moment of stopping injection, preventing ointment leakage. This ensures the accuracy of dosage control and the cleanliness of the operating environment.

[0035] like Figures 1 to 5 As shown, in some embodiments of this application, the push rod 13 is provided with a pawl groove 133, and the outer shell 12 is provided with a pawl body 121 that slides and engages with the pawl groove 133.

[0036] The pawl groove 133 on the push rod 13 and the pawl body 121 that slides and engages on the outer shell 12 together constitute a one-way locking mechanism. By utilizing the meshing characteristics of the pawl and the pawl groove 133, the push rod 13 is allowed to slide smoothly when pushed towards the inner liner 11. When the push rod 13 stops applying force or is subjected to a reverse force, the pawl will automatically engage in the nearest pawl groove 133, forming a rigid anti-reverse structure.

[0037] This effectively prevents the push rod 13 from retracting due to the high viscosity resistance of the temporary sealing ointment or accidental loosening of the hand, ensuring the stability and accuracy of the injected dose and avoiding dosage errors caused by ointment backflow. At the same time, the stepped distribution of the pawl groove 133 provides clear tactile feedback to medical staff, making the injection action present a clear sense of progression, which facilitates precise administration of micro-volumes and fractions in delicate treatments, greatly improving the reliability and safety of the operation.

[0038] like Figures 1 to 5 As shown, in some embodiments of this application, a transparent protective cover 151 is provided on the outside of the nozzle 15; The transparent shield 151 blocks the outlet of the nozzle 15 when there is no external pressure.

[0039] The transparent shield 151 physically seals the nozzle 15 outlet under normal conditions, effectively isolating it from airborne dust, bacteria, and saliva splashes in the oral environment. This prevents the nozzle 15 from being contaminated during storage or operation, ensuring the aseptic application of the temporary sealing paste. At the same time, its transparent material provides medical staff with excellent visibility, allowing them to clearly observe the position of the nozzle 15 and the state of the paste without removing the shield, facilitating precise location of the cavity in the affected tooth. The external force-triggered opening mechanism achieves automated operation of "opening upon contact and closing upon removal," which simplifies clinical procedures and minimizes the exposure time of the nozzle 15, significantly improving the safety and hygiene standards of the treatment process.

[0040] like Figures 1 to 5 As shown, in some embodiments of this application, a transparent observation window 122 is provided on the side wall of the outer shell 12 at a position corresponding to the inner liner 11, and the transparent observation window 122 extends along the axial direction of the inner liner 11.

[0041] The transparent observation window 122 breaks through the visual obstruction of the outer shell 12, allowing medical staff to directly observe the remaining amount, color changes, and physical properties of the temporary sealing ointment inside the inner liner 11 without disassembling the device or opening the packaging. Extending axially, it ensures that the observation range covers the main effective stroke of the inner liner 11, providing a continuous and complete liquid level view. This facilitates rapid assessment before treatment to determine if the device meets current treatment needs, or real-time monitoring of ointment consumption during treatment, preventing treatment interruptions due to insufficient remaining amount. Simultaneously, it helps to promptly detect any abnormalities such as drying or layering of the ointment, ensuring the safety and convenience of clinical use.

[0042] In some embodiments of this application, the outlet diameter of the arc-shaped nozzle 15 is 1.0 mm to 2.0 mm.

[0043] In terms of physical principles, a smaller outlet orifice diameter can significantly increase the fluid resistance and shear rate during paste extrusion, causing the temporary sealing paste to form a fine stream or dense extrudate with specific cohesive force the instant it leaves the nozzle, effectively preventing the paste from dripping or flowing uncontrollably due to gravity.

[0044] In clinical applications, the 1.0mm to 2.0mm diameter precisely matches the size characteristics of typical tooth cavities and root canal orifices. This ensures that the paste can quickly fill the cavity with sufficient flow, improving treatment efficiency, while avoiding paste overflow and contamination of adjacent teeth or gums due to an excessively large diameter, or excessive injection pressure and laborious operation due to an excessively small diameter. It achieves the best balance between flow control, operational precision, and ease of use.

[0045] like Figures 4 to 5 As shown, in some embodiments of this application, a semi-enclosed safety shield 16 is fitted on the bottom side of the end of the housing 12, and the length of the safety shield 16 is greater than the length of the nozzle 15. The safety shield 16 is slidably connected to the outer shell 12. The edge of the safety shield 16 has an arc transition structure. The side of the safety shield 16 facing the oral cavity is provided with a guide groove 161. The two sides of the safety shield are provided with baffles 162.

[0046] The safety shield 16 is slidably connected to the outer shell 12. The front end of the safety shield 16 does not contact the oral tissue and only serves a protective function. The overall edge of the safety shield 16 is fully rounded, and a guide groove 161 is provided on the side facing the oral cavity. Low baffles 162 are provided on both sides. The insertion depth of the nozzle 15 can be limited and controlled by the built-in mechanical structure of the device.

[0047] The length of the safety cover 16 ensures that the nozzle 15 is completely enclosed inside the cover when the device is idle or moved, effectively preventing the sharp or protruding nozzle 15 from accidentally piercing the oral mucosa, gums and other soft tissues of medical staff or patients, and also preventing the nozzle 15 from being deformed or damaged due to accidental impact.

[0048] During clinical application, the safety shield 16 retracts along the outer shell 12 with the application of force. The safety shield 16 has an open structure, providing a wide and unobstructed operating field of vision. The guide groove 161 on the inner side of the safety shield 16 can promptly guide saliva and temporary sealing paste residue, reducing the entry of impurities into the sliding gap and ensuring smooth sliding movements. The fully rounded corners can avoid scratching the soft tissues of the oral cavity, and the low side rails 162 only provide lateral protection and do not restrict the movement of the instrument. The insertion depth of the nozzle 15 is precisely limited by the built-in mechanical structure of the device, which can effectively prevent the nozzle 15 from being inserted too deeply and damaging the periapical tissue or causing pain to the patient. While ensuring the accuracy of operation, it greatly improves the biosafety and patient comfort during oral treatment.

[0049] Furthermore, in this embodiment, the safety shield 16 is designed as a semi-enclosed structure and optimized. The rigid enclosure of a fully enclosed cylindrical structure is abandoned, and physical extension is only provided on the bottom side of the device, thus preserving ample open space above and to the side of the nozzle 15. The safety shield 16 adopts a fully rounded corner design and adds a guide channel 161 and a low baffle 162 to improve safety and ease of cleaning. This safety shield 16 only serves a protective function and no longer relies on external contact for limiting movement. The nozzle extension depth is precisely controlled by the device's built-in mechanical structure, combined with a sliding connection mechanism, balancing clinical safety, operational smoothness, and actual user experience.

[0050] Based on considerations of "obstructed vision" and "limited operation," on the one hand, the semi-enclosed open design breaks down visual blind spots, allowing medical staff to see directly to the tip of the nozzle 15 and the cavity of the affected tooth without obstruction, enabling precise and visual operation and avoiding paste overflow or waste caused by blind injection. On the other hand, this lightweight, asymmetrical structure significantly reduces the volume of the instrument's tip. The rounded shape of the safety shield 16 and the low-profile baffle 162 will not cause scratches to oral tissues, completely eliminating interference between the safety shield 16 and the buccal mucosa and tongue, freeing up the instrument's swing angle, and significantly reducing the patient's foreign body sensation and discomfort. The device's built-in mechanical structure precisely limits the insertion depth of the nozzle 15, preventing soft tissue damage, while also ensuring operational flexibility and accuracy in confined spaces such as children's mouths.

[0051] In some embodiments of this application, the surface of the outer casing 12 is coated with an ultraviolet blocking layer; The inner wall of the outer shell 12 is provided with several axially extending reinforcing ribs at the position corresponding to the inner liner 11.

[0052] The ultraviolet blocking layer utilizes the principle of light shielding to effectively absorb or reflect ultraviolet radiation from the external environment, preventing the photosensitive temporary sealing ointment in the inner liner 11 from undergoing photopolymerization or chemical degradation due to prolonged exposure to light. This ensures that the ointment maintains stable physical properties and clinical efficacy within its shelf life. Meanwhile, the axial reinforcing ribs on the inner wall form a longitudinal support skeleton, significantly improving the bending stiffness and torsional strength of the outer shell 12. This makes the outer shell 12 less prone to deformation when subjected to gripping pressure or accidental drop impact, thereby preventing the push rod 13 from jamming or the ointment from accidentally overflowing due to deformation of the outer shell 12 squeezing the inner liner 11. This ensures the structural reliability and smooth operation of the device in complex clinical environments.

[0053] like Figure 4 As shown, in some embodiments of this application, the outer casing 12 is also provided with a dose reset button 124; When the dose reset button 124 is pressed, the engagement between the pawl body 121 and the pawl groove 133 is released, so that the push rod 13 is pulled back to the initial position under external force.

[0054] Based on the principles of mechanical unlocking and elastic reset, the technical challenge of the one-way locking structure being unable to operate in reverse is solved. When medical staff need to refill the temporary sealing paste or adjust the dosage, they only need to press the button to force the pawl body 121 to disengage from the current pawl groove 133 through the internal transmission structure, thereby releasing the rigid anti-reverse restriction on the push rod 13. At this time, the push rod 13 can smoothly return to the initial position under the action of external pulling force, preparing for the next filling or calibration.

[0055] This not only significantly improves the reusability and ease of maintenance of the device, avoiding overall scrapping due to the inability to reset, and reducing clinical usage costs, but also ensures the accuracy of zeroing the dose scale, keeping the measurement benchmark consistent for each injection, effectively eliminating the impact of cumulative errors on treatment accuracy, and significantly enhancing the operational flexibility and long-term reliability of the device.

[0056] In addition, the injectable temporary sealing ointment storage and application device provided in this application takes into account medical-grade safety, structural mechanical properties and special functional requirements in the selection of materials.

[0057] The inner liner 11, serving as the carrier for the temporary sealing paste, is made of medical-grade polymer materials (such as medical-grade polypropylene PP or high-density polyethylene HDPE) with excellent chemical stability and biocompatibility to ensure it does not react with the paste components and facilitates injection. The outer shell 12 and the transparent observation window 122 are made of polycarbonate (PC) or medical-grade ABS engineering plastic. These materials not only possess excellent impact resistance to protect the inner liner 11 from external damage but also provide excellent optical transparency to meet liquid level monitoring requirements. For the phase change energy storage ring that enables heat conduction, a safe, non-toxic, and biocompatible paraffin-based or fatty acid-based phase change material with a suitable phase change temperature (slightly lower than human body temperature) is selected. The honeycomb structure 141 and its main body on the outer periphery of the piston 14 are made of medical-grade liquid silicone or thermoplastic polyurethane (TPU), utilizing their excellent flexibility and resilience to ensure that the microstructure can closely adhere to the inner wall during friction and provide good sealing and lubrication effects.

[0058] In addition, the pawl body 121 and the dose reset button 124, which carry the mechanical interlock function, have high wear resistance and fatigue strength. They can be made of self-lubricating engineering plastics such as polyoxymethylene (POM) or nylon (PA) to ensure a long service life under frequent pressing and sliding engagement. The nozzle 15 takes into account a certain degree of rigidity and toughness. It is made of modified medical plastic or soft silicone. Its micro-pore size design of 1.0mm to 2.0mm, combined with the surface smoothness of the material, can effectively reduce fluid resistance. Finally, the ultraviolet blocking layer on the surface of the shell 12 adopts a food / medical grade UV absorbing coating or co-extruded composite film to provide reliable light shielding protection for the photosensitive temporary sealing paste without affecting the overall feel.

[0059] Considering that the dosage of temporary sealing material required for routine procedures such as filling a single tooth cavity, sealing root canal orifices, or sealing implant screw channels is typically between 0.5 and 1.5 grams, the effective volume of the inner liner 11 of this device is set between 2.0 ml and 3.0 ml (corresponding to approximately 2.5 g to 4.0 g of temporary sealing paste). This specification allows medical staff to complete temporary restorations of multiple teeth consecutively after a single filling, significantly reducing the frequency of interruptions for material changes and improving treatment efficiency; it also avoids the bulky overall size of the device due to excessive capacity, thus maintaining ease of single-handed operation and comfortable grip.

[0060] Furthermore, for certain special clinical scenarios (such as preventative fissure sealing of multiple teeth or temporary restoration of large areas of missing tissue), extended-capacity sizes of 3.0ml and above are available to meet the needs of high-intensity continuous operations. Combined with the transparent observation window 122 extending axially along the sidewall of the inner liner 11 and the stepping ratchet groove 133 on the push rod 13, regardless of the capacity, the remaining amount of paste inside can be converted into intuitive visual scales and clear tactile feedback, ensuring that medical staff can accurately control the dosage of each injection, maximizing material utilization and refining clinical procedures.

[0061] Furthermore, to meet stringent clinical aseptic treatment standards and improve instrument reusability, this device has undergone targeted optimization in terms of disinfection compatibility. In addition to the front nozzle 15 supporting separate disassembly for routine autoclaving or immersion sterilization, the main body of the device also possesses excellent durability. Its outer shell 12 and core transmission components are made of high-temperature resistant special medical polymer materials, capable of withstanding high-temperature, high-pressure steam sterilization up to 134°C without deformation or performance degradation; simultaneously, the device surface can also be quickly wiped with medical alcohol for disinfection. This dual disinfection compatibility mechanism ensures that the device maintains reliable biosafety and mechanical stability after multiple cycles of use, meeting the efficient and safe infection control requirements of modern dental clinics.

[0062] For any parts not mentioned in this application, existing technologies may be used or referenced.

[0063] The various embodiments in this specification are described in a progressive manner. The same or similar parts between the various embodiments can be referred to each other. Each embodiment focuses on describing the differences from other embodiments.

[0064] The above description is merely an embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. An injectable temporary sealing paste storage and application device, characterized in that, include: The sealed storage module includes an inner liner (11) for holding temporary sealing paste, and an outer shell (12) fitted over the inner liner (11). The push module includes a push rod (13) inserted into the inner liner (11), the push end of the push rod (13) is provided with a piston (14) that fits against the inner wall of the inner liner (11), and the push rod (13) is provided with a dosage scale; The end of the inner liner (11) is provided with a nozzle (15), which has an arc-shaped structure.

2. The injectable temporary sealing paste storage and application device according to claim 1, characterized in that, A vacuum interlayer is provided between the outer shell (12) and the inner liner (11), and the force-applying end of the push rod (13) is provided with a non-slip pressing handle (132). The non-slip press handle (132) is embedded with a phase change energy storage ring, which is used to absorb hand temperature and conduct it to the inner liner (11) to adjust the viscosity of the temporary sealing paste.

3. The injectable temporary sealing paste storage and application device according to claim 1, characterized in that, A honeycomb structure (141) is formed on the outer peripheral wall of the piston (14). The depth of the honeycomb structure (141) ranges from 0.1 mm to 0.5 mm.

4. The injectable temporary sealing paste storage and application device according to claim 1, characterized in that, The push rod (13) is provided with a pawl groove (133), and the outer shell (12) is provided with a pawl body (121) that slides and engages with the pawl groove (133).

5. The injectable temporary sealing paste storage and application device according to claim 1, characterized in that, The nozzle (15) is covered with a transparent protective cover (151). The transparent shield (151) blocks the nozzle (15) outlet when there is no external pressure.

6. The injectable temporary sealing paste storage and application device according to claim 1, characterized in that, A transparent observation window (122) is provided on the side wall of the outer shell (12) at a position corresponding to the inner liner (11), and the transparent observation window (122) extends along the axial direction of the inner liner (11).

7. The injectable temporary sealing paste storage and application device according to any one of claims 1 to 6, characterized in that, The diameter of the outlet end of the arc-shaped nozzle (15) is 1.0 mm to 2.0 mm.

8. The injectable temporary sealing paste storage and application device according to claim 1, characterized in that, The bottom end of the outer shell (12) is fitted with a semi-enclosed safety shield (16), the length of which is greater than the length of the nozzle (15). The safety shield (16) is slidably connected to the outer shell (12). The edge of the safety shield (16) has an arc transition structure. The side of the safety shield (16) facing the oral cavity is provided with a guide groove. The two sides of the safety shield (16) are provided with baffles.

9. The injectable temporary sealing paste storage and application device according to claim 1, characterized in that, The surface of the outer shell (12) is coated with an ultraviolet blocking layer; The inner wall of the outer shell (12) is provided with a number of axially extending reinforcing ribs at the position corresponding to the inner liner (11).

10. The injectable temporary sealing paste storage and application device according to claim 4, characterized in that, The outer casing (12) is also provided with a dose reset button (124). When the dose reset button (124) is pressed, the engagement between the pawl body (121) and the pawl groove (133) is released, so that the push rod (13) is pulled back to the initial position under external force.

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