Frozen cotton ball for stopping bleeding after oral cavity tooth extraction and use method of frozen cotton ball

Abstract

The invention discloses a frozen cotton ball for stopping bleeding after oral cavity tooth extraction and a using method of the frozen cotton ball. The frozen cotton ball comprises an outer-layer waterproof film, a middle-layer water absorption cotton body and an inner-layer condensation body which are sequentially wrapped from outside to inside. The outer-layer waterproof film is made of a waterproof breathable material and is used for preventing oral saliva from entering; a plurality of one-way air holes are formed in the surface of the outer-layer waterproof film; the middle-layer water-absorbing cotton body is made of sterile cotton fibers, and the middle-layer water-absorbing cotton body contains hemostatic factors and is used for promoting blood coagulation and hemostasis at a tooth extraction wound; the inner-layer condensation body is made of a condensable gel material capable of being frozen, and after the inner-layer condensation body is frozen for 4-6 hours at the temperature ranging from-20 DEG C to-18 DEG C, the inner-layer condensation body keeps the low-temperature state of 0-4 DEG C in the oral cavity for 30-40 minutes. The frozen cotton ball can provide a cold compress effect after tooth extraction, is not easily soaked by saliva, can maintain long-time hemostasis pressure, improves the hemostasis effect after tooth extraction, relieves the pain and discomfort of a patient, and shortens the hemostasis time.

Description

Technical Field

[0001] This invention relates to the technical field of dental medical consumables, specifically to a frozen cotton ball for hemostasis after tooth extraction and its method of use. Background Technology

[0002] Tooth extraction is a common treatment in dentistry, and post-extraction hemostasis is crucial for patient recovery. Currently, the most common clinical method for stopping bleeding after tooth extraction is to have the patient bite down on a cotton ball to apply pressure and stop the bleeding. However, traditional cotton balls have several shortcomings in their use.

[0003] During the hemostasis process after tooth extraction, patients typically need to bite down on a cotton ball for at least 30 minutes to achieve effective hemostasis, a process that is quite lengthy and uncomfortable for them. Traditional hemostatic cotton balls are easily soaked with saliva in the mouth, which not only reduces their hemostatic effect but may also cause the cotton ball to deform and loosen, making it impossible to maintain stable pressure on the wound. In addition, ordinary cotton balls cannot provide the effect of cold compresses, which are an effective way to reduce postoperative swelling and pain.

[0004] Several improved designs of hemostatic cotton balls exist in the prior art. For example, CN221060923U discloses a hemostatic cotton ball to prevent aspiration in young children after tooth extraction. This design includes a cotton ball body and a clamp for holding the tooth. The clamp increases the tightness of the connection between the cotton ball and the tooth, preventing the cotton ball from slipping out. A compression layer further compresses the cotton ball body outwards, improving the hemostatic effect. CN217090997U proposes an auxiliary assessment device for bleeding volume after tooth extraction. This device includes a dental crown part and a hemostatic part, and the amount of bleeding can be assessed by the height of the hemostatic cotton ball soaked in blood.

[0005] Regarding material improvements, CN201939596U introduces a soluble hemostatic cotton ball. This cotton ball dissolves naturally upon contact with bodily fluids seeping from a wound, forming a thin film that covers the wound, achieving rapid, safe, and reliable hemostasis. CN112641483A discloses an automatic pressure hemostatic device after tooth extraction. Through the cooperation of a fixing mechanism and a pressure hemostatic mechanism, it applies pressure to the gum area after tooth extraction to stop bleeding and absorbs the blood flowing from the gum area. It is convenient and comfortable to use and does not shift. Furthermore, CN221997907U proposes a hemostatic cotton ball that solves the safety hazard of the cotton ball easily falling into the mouth or trachea by adding a mesh bag to the outside of the cotton ball and connecting a tail rope.

[0006] However, existing hemostatic cotton balls still have significant shortcomings. First, traditional cotton balls are easily soaked in saliva in the oral environment, reducing their hemostatic effect. Second, conventional cotton balls cannot provide a cold compress function and cannot effectively relieve pain and swelling after tooth extraction. Third, patients need to bite down on the cotton ball for a long time (at least 30 minutes), during which the cotton ball may deform due to wetting and cannot provide stable pressure continuously. In addition, although existing improved hemostatic cotton balls have made improvements in terms of fixation and prevention of aspiration, they still fail to meet the need for cold compress hemostasis.

[0007] Therefore, there is an urgent need to develop a cold hemostatic cotton ball that can provide a cold compress effect after tooth extraction, is not easily soaked by saliva, and can maintain hemostatic pressure for a longer period of time, so as to improve the hemostatic effect after tooth extraction, reduce patient pain and discomfort, and shorten the hemostasis time. Summary of the Invention

[0008] The purpose of this invention is to overcome the shortcomings of the above-mentioned background technology and provide a frozen cotton ball for hemostasis after tooth extraction and its method of use.

[0009] To achieve the above objectives, the present invention provides a frozen cotton ball for hemostasis after tooth extraction, comprising an outer waterproof membrane, a middle absorbent cotton body, and an inner condenser body wrapped sequentially from the outside to the inside. The outer waterproof membrane is made of waterproof and breathable material to prevent oral saliva from entering; the surface of the outer waterproof membrane is provided with several one-way ventilation holes; The middle absorbent cotton body is made of sterile cotton fiber and contains hemostatic factors to promote blood clotting and hemostasis at the tooth extraction site. The inner condenser is made of a freeze-resistant condensing gel material. After being frozen at -20°C to -18°C for 4 to 6 hours, the inner condenser is kept at a low temperature of 0 to 4°C in the oral cavity for 30 to 40 minutes.

[0010] In a preferred embodiment, the outer waterproof membrane has a thickness of 0.01 to 0.05 mm; the diameter of the one-way vent is approximately 0.001 to 0.005 mm, and the density is 5 to 10 vents per square centimeter.

[0011] In a preferred embodiment, the thickness of the middle absorbent cotton layer is 3 to 5 mm, and the density is 0.08 to 0.12 g / cm³.

[0012] In a preferred embodiment, the hemostatic factor includes oxidized regenerated cellulose and thrombin.

[0013] In a preferred embodiment, the inner condenser comprises a compound of sodium polyacrylate and glycerol.

[0014] In a preferred embodiment, the inner condensate contains a hemostatic component selected from one or more of tranexamic acid, gelatin sponge, and fibrin.

[0015] In a preferred embodiment, the outer surface of the inner condenser is covered with a heat insulation layer, the thickness of which is 0.5 to 1 mm.

[0016] In a preferred embodiment, the frozen cotton ball used for hemostasis after tooth extraction is spherical, ellipsoidal, or cylindrical.

[0017] In a preferred embodiment, the surface of the outer waterproof membrane is provided with an anti-slip texture; the surface of the outer waterproof membrane is also provided with an indicator mark, which is used to indicate the service life and placement location.

[0018] The present invention also provides a method for using the above-mentioned frozen cotton ball for hemostasis after tooth extraction: the frozen cotton ball for hemostasis after tooth extraction is pre-frozen at a temperature of -20℃ to -18℃ for 4 to 6 hours; the frozen cotton ball is taken out and placed on the wound after tooth extraction; the patient bites down on the frozen cotton ball to apply pressure to the wound and apply a cold compress, thereby achieving rapid hemostasis.

[0019] Compared with the prior art, the present invention has the following advantages: Firstly, this invention addresses the shortcomings of existing technologies where ordinary cotton balls used after tooth extraction are easily soaked with saliva, failing to achieve the purpose of ice application and hemostasis, and requiring patients to bite down on the cotton ball for at least 30 minutes to achieve hemostasis, which is a lengthy process. This invention provides a frozen cotton ball for hemostasis after tooth extraction. The outer waterproof membrane design effectively solves the problem of ordinary cotton balls being easily soaked with saliva, maintaining the low-temperature effect of the frozen hemostatic material. The inner frozen hemostatic material provides a continuous low-temperature environment, promoting vasoconstriction and accelerating the hemostasis process, shortening the hemostasis time compared to traditional cotton balls. The ice application effect effectively reduces pain and swelling after tooth extraction, improving patient comfort. The special shape and anti-slip texture make it easier for patients to bite down and fix the cotton ball, reducing discomfort during use. The overall design meets medical and hygiene requirements, the material is safe and non-toxic, and suitable for intraoral use.

[0020] Secondly, the outer waterproof membrane of this invention is waterproof and breathable, preventing saliva from entering the wound and avoiding infection, while keeping the wound environment dry. The middle layer of sterile absorbent cotton contains hemostatic factors, which can absorb a large amount of blood from the wound and accelerate coagulation to form a stable blood clot. The inner layer of freeze-thawable cotton provides a low-temperature cold compress of 0-4°C, with the low-temperature effect lasting for 30-40 minutes, further reducing bleeding and alleviating pain through vasoconstriction. The above design enables the frozen cotton ball to simultaneously achieve the combined effects of physical compression, drug coagulation, and low-temperature hemostasis and analgesia, realizing hemostasis and analgesia treatment of the wound after tooth extraction in one go, avoiding the cumbersome steps of traditional external ice pack cold compresses, significantly shortening the hemostasis time and promoting wound healing.

[0021] Thirdly, the outer waterproof membrane of this invention has a thickness of 0.01–0.05 mm, and the diameter of the one-way vent is approximately 0.001–0.005 mm, with a density of 5–10 pores per square centimeter. Controlling the thickness of the outer waterproof membrane within this range ensures that it is both soft and conforms well to the patient's bite, providing sufficient strength and a reliable waterproof barrier. The tiny one-way vents, with a diameter of 0.001–0.005 mm and a density of 5–10 pores per square centimeter, give the membrane selective one-way permeability to gas: moisture seeping from the wound can escape through the micropores, keeping the wound dry, while external liquids and microorganisms have difficulty penetrating. This design effectively avoids the risk of infection or interference with hemostasis caused by contaminants such as saliva entering the wound, further improving the reliability of hemostasis.

[0022] Fourth, the middle absorbent cotton layer of this invention has a thickness of 3-5 mm and a density of 0.08-0.12 g / cm³. The 3-5 mm thickness provides ample space for filling and blood absorption, allowing the cotton ball to conform to the extraction wound and accommodate significant blood loss without being too heavy or affecting the patient's bite. The 0.08-0.12 g / cm³ density of the cotton fibers gives the cotton ball both good absorbency and appropriate elasticity, providing both softness and support, applying uniform pressure to the wound without damaging tissue while absorbing blood. This optimized combination of thickness and density ensures the cotton ball's high hemostatic performance and ease of use, rapidly absorbing blood to promote coagulation while maintaining its shape stability, thus improving the overall patient experience and the reliability of hemostasis.

[0023] Fifth, the hemostatic factors of this invention include oxidized regenerated cellulose and thrombin. These two hemostatic components work synergistically to significantly improve the local hemostatic efficiency of the cotton ball. Oxidized regenerated cellulose, as an excellent local hemostatic material, rapidly absorbs blood at the wound site, forming a viscous gel-like substance that provides a physical scaffold to promote platelet aggregation and can be gradually absorbed by the body. Thrombin directly accelerates the blood coagulation process, rapidly converting fibrinogen into fibrin, allowing a blood clot to form in a short time. The combination of oxidized regenerated cellulose and thrombin effectively shortens the clotting time of extraction wounds, enabling timely hemostasis even in patients with weak coagulation function, significantly improving the hemostatic reliability of frozen cotton balls.

[0024] Sixth, the inner condenser of this invention comprises a composite of sodium polyacrylate and glycerin. This composite material serves as an excellent cryogenic gel source, ensuring the frozen cotton ball maintains stable low-temperature performance over a long period. Sodium polyacrylate is a highly absorbent and water-retaining polymer material; when frozen into a gel, it can retain cold for an extended period without liquid leakage. Glycerin lowers the freezing point of the gel and maintains its softness at low temperatures, preventing the condenser from hardening after freezing and affecting its adhesion to the wound. Through the above design, after pre-freezing the frozen cotton ball in an environment of -20°C to -18°C for 4 to 6 hours, it can stably maintain a low temperature of 0 to 4°C for approximately 30 to 40 minutes, continuously providing cold compress hemostasis and analgesia to the wound. Moreover, this sodium polyacrylate-glycerin condenser material is non-toxic and non-irritating, making it safe and reliable to use.

[0025] Seventh, the hemostatic components of this invention are selected from one or more of tranexamic acid, gelatin sponge, and fibrin. By adding drug and material hemostatic mechanisms to the low-temperature hemostasis, the hemostatic effect is further enhanced. Tranexamic acid, as an antifibrinolytic drug, can prevent premature disintegration of blood clots and prolong the duration of clotting; gelatin sponge, as a physical tampon, can fill the wound and provide a scaffold for platelet attachment, promoting their aggregation into clots; fibrin directly participates in the coagulation process, forming a strong blood clot together with platelets. Combining one or more of the above hemostatic components with a cryoprotectant gives the frozen cotton ball multiple hemostatic pathways, enabling faster and more thorough hemostasis even in cases of severe bleeding.

[0026] Eighth, the frozen cotton ball of the present invention has a 0.5-1 mm thick insulating layer covering the outer surface of the inner condensate. This insulating layer slows down the rate at which the cold energy of the condensate is released outward, preventing excessively low temperatures from directly irritating oral tissues or causing frostbite, while also making the cold compress process gentler and more even. Through appropriate insulation, the low-temperature effect of the condensate is prolonged, allowing the cotton ball to maintain effective cold compress on the wound for a longer period, ensuring a continuous hemostatic and analgesic effect of 30-40 minutes. The insulation layer thickness is controlled at 0.5-1 mm, ensuring sufficient insulation performance without being too thick to hinder the cotton ball's adherence to the wound and pressure transmission, thus maintaining a stable hemostatic effect.

[0027] Ninth, the outer waterproof membrane of this invention has an anti-slip texture on its surface and is marked with indicators indicating the expiration date and placement location. The anti-slip texture increases the friction between the cotton ball surface and the oral mucosa and the operating fingers or instruments, preventing the cotton ball from slipping and falling off even when moistened with saliva, ensuring stable positioning and continuous pressure for hemostasis at the wound site. The indicators clearly show the product's expiration date and correct placement method, facilitating medical personnel to check if the cotton ball is within its expiration date and ensuring reliable material performance; it also guides users to correctly place the cotton ball at the wound according to the markings, avoiding impaired hemostasis due to improper placement. These user-friendly designs improve the safety and standardization of frozen cotton ball use, ensuring a more controllable and effective hemostasis process.

[0028] Tenth, the method of using the frozen cotton ball for hemostasis according to the present invention includes pre-freezing the cotton ball at -20℃ to -18℃ for 4 to 6 hours, then placing it on the extraction wound after removal, with the patient biting down on the cotton ball to apply pressure to the wound and perform cold compress hemostasis. Pre-freezing ensures that the condensate inside the cotton ball reaches a sufficient cold storage state, and the above freezing parameters ensure that the cotton ball provides a continuous low temperature for up to 30 to 40 minutes after being placed in the oral cavity. Placing the cotton ball directly on the extraction wound and having the patient bite down to fix it achieves simultaneous compression hemostasis and cold compress analgesia: mechanical compression helps to close the wound blood vessels and promote blood clot formation, while local low temperature causes vasoconstriction to slow bleeding and reduce pain. The entire method of use is simple and convenient, and can achieve hemostasis immediately after surgery without the need for complicated equipment, effectively shortening the hemostasis treatment time and reducing the risk of postoperative bleeding, significantly improving the efficiency and safety of postoperative care. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of a frozen cotton ball used for hemostasis after tooth extraction according to an embodiment of the present invention; Figure 2 for Figure 1 Schematic diagram of the structure along the AA direction; Figure 3 This is a three-dimensional structural diagram of a frozen cotton ball used for hemostasis after tooth extraction according to an embodiment of the present invention. In the diagram, the outer waterproof membrane is 1, the middle absorbent cotton is 2, and the inner condenser is 3. Detailed Implementation

[0030] The following examples illustrate the implementation of the present invention in detail, but they do not constitute a limitation on the invention and are merely illustrative. Furthermore, the advantages of the present invention will become clearer and easier to understand by explaining them.

[0031] This invention proposes a frozen cotton ball for hemostasis after tooth extraction, comprising, from the outside in, an outer waterproof membrane 1, a middle absorbent cotton body 2, and an inner condensate body 3. Preferably, the frozen cotton ball is spherical, ellipsoidal, or cylindrical, with an overall diameter of 2-3 cm and a weight of approximately 3-5 grams, a suitable size for easy biting by the patient. The frozen cotton ball has a smooth surface, does not irritate the oral mucosa, and is biodegradable or disposable after use without special treatment.

[0032] The outer waterproof membrane 1 is made of waterproof and breathable material to prevent oral saliva from entering; the surface of the outer waterproof membrane 1 is provided with several one-way breathable holes.

[0033] Specifically, the outer waterproof membrane 1 is made of medical-grade biodegradable waterproof and breathable material, which has a certain degree of elasticity and toughness. It is preferably made of medical-grade silicone material or medical-grade waterproof and breathable membrane, which has good biocompatibility and waterproof performance, while maintaining breathability to prevent moisture accumulation in the oral cavity.

[0034] In one embodiment, the outer waterproof membrane 1 has a thickness of 0.01 to 0.05 mm and is semi-transparent.

[0035] In another embodiment, the surface of the outer waterproof membrane 1 is designed with tiny one-way pores, the diameter of which is approximately 0.001–0.005 mm, and the density is 5–10 pores per square centimeter. This design allows blood in the mouth to enter the cotton ball and be absorbed, but saliva will not easily seep into the interior, thus maintaining the low-temperature effect of the inner condensate. The outer waterproof membrane also has good biocompatibility and will not irritate the oral mucosa.

[0036] In another embodiment, the surface of the outer waterproof membrane 1 is provided with anti-slip texture to facilitate patient biting and fixation; In another embodiment, the surface of the outer waterproof membrane 1 is also provided with an indicator mark, which is used to indicate the service life and placement location, and preferably to indicate the optimal service time.

[0037] The middle absorbent cotton body 2 is made of sterile cotton fibers and contains hemostatic factors to promote blood clotting and hemostasis at the extraction site.

[0038] Specifically, the middle absorbent layer 2 is made of medical-grade sterile cotton fiber, with a thickness of 3-5 mm and a spherical structure. This middle absorbent layer has high absorbency and blood absorption capacity, enabling it to quickly absorb blood seeping from the wound.

[0039] In one embodiment, hemostatic factors, including oxidized regenerated cellulose and thrombin, are added inside the middle absorbent cotton body 2 to promote blood coagulation and accelerate the hemostasis process.

[0040] In another embodiment, the density of the middle absorbent cotton layer is 0.08-0.12 g / cm³, which ensures sufficient absorbency without losing its shape due to excessive looseness.

[0041] The inner condenser 3 is made of a freezeable condensing gel material. After being frozen at -20℃ to -18℃ for 4 to 6 hours, the inner condenser 3 is kept at a low temperature of 0 to 4℃ in the oral cavity for 30 to 40 minutes.

[0042] Specifically, the inner condenser 3 is located at the center of the entire cotton ball, with a diameter of approximately 1 to 1.5 centimeters, and is made of medical-grade condensing gel material.

[0043] In one embodiment, the material of the inner condenser 3 contains a complex of sodium polyacrylate and glycerol, which has high heat capacity and slow cooling characteristics.

[0044] In one embodiment, the inner condenser 3 contains a hemostatic component selected from one or more of tranexamic acid, gelatin sponge, and fibrin.

[0045] In another embodiment, the surface of the inner condenser is covered with a heat insulation layer with a thickness of 0.5 to 1 mm to prevent frostbite caused by direct contact with oral tissues due to excessively low temperatures, and can also be used to prolong the duration of the freezing effect.

[0046] The present invention discloses a method for using frozen cotton balls for hemostasis after tooth extraction. The frozen cotton balls are pre-frozen at -20°C to -18°C for 4 to 6 hours. When ready for use, the frozen cotton balls are removed and placed on the extraction site. The patient bites down on the frozen cotton balls to apply pressure to the wound and perform a cold compress, thereby achieving rapid hemostasis. Due to the outer waterproof membrane, saliva does not quickly soak the cotton ball, and the inner condensate layer continuously releases low temperatures, providing a cooling effect for hemostasis. Simultaneously, the middle absorbent cotton layer absorbs blood and promotes coagulation; this dual action effectively shortens the hemostasis time and improves the hemostatic effect.

[0047] The above are merely specific embodiments of the present invention. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the protection scope of the present invention. All other details not described in detail belong to the prior art.

Claims

1. A frozen cotton ball for hemostasis after tooth extraction, characterized in that: It includes an outer waterproof membrane (1), a middle absorbent cotton body (2), and an inner condensate body (3) wrapped from the outside to the inside. The outer waterproof membrane (1) is made of waterproof and breathable material to prevent oral saliva from entering; the surface of the outer waterproof membrane (1) is provided with a number of one-way breathable holes; The middle absorbent cotton body (2) is made of sterile cotton fiber and contains hemostatic factors to promote blood clotting and hemostasis at the extraction site. The inner condenser (3) is made of a freezeable condensing gel material. After being frozen at -20℃ to -18℃ for 4 to 6 hours, the inner condenser (3) is kept at a low temperature of 0 to 4℃ in the oral cavity for 30 to 40 minutes.

2. The frozen cotton ball for hemostasis after tooth extraction according to claim 1, characterized in that: The outer waterproof membrane (1) has a thickness of 0.01 to 0.05 mm; the diameter of the one-way vent is about 0.001 to 0.005 mm, and the density is 5 to 10 per square centimeter.

3. The frozen cotton ball for hemostasis after tooth extraction according to claim 1, characterized in that: The thickness of the middle absorbent cotton body (2) is 3-5 mm and the density is 0.08-0.12 g / cm³.

4. The frozen cotton ball for hemostasis after tooth extraction according to claim 1, 2, or 3, characterized in that: The hemostatic factors include oxidized regenerated cellulose and thrombin.

5. The frozen cotton ball for hemostasis after tooth extraction according to claim 4, characterized in that: The inner condenser (3) contains a complex of sodium polyacrylate and glycerol.

6. The frozen cotton ball for hemostasis after tooth extraction according to claim 1, 2, or 3, characterized in that: The inner condenser (3) contains a hemostatic component selected from one or more of tranexamic acid, gelatin sponge, and fibrin.

7. The frozen cotton ball for hemostasis after tooth extraction according to claim 6, characterized in that: The outer surface of the inner condenser (3) is covered with a heat insulation layer, the thickness of which is 0.5 to 1 mm.

8. The frozen cotton ball for hemostasis after tooth extraction according to claim 1, 2, or 3, characterized in that: The frozen cotton balls used for hemostasis after tooth extraction are spherical, ellipsoidal, or cylindrical.

9. The frozen cotton ball for hemostasis after tooth extraction according to claim 1, 2, or 3, characterized in that: The surface of the outer waterproof membrane (1) is provided with an anti-slip texture; the surface of the outer waterproof membrane (1) is also provided with an indicator mark, which is used to indicate the service life and placement location.

10. A method of using a frozen cotton ball for hemostasis after tooth extraction as described in any one of claims 1 to 9, characterized in that: Pre-freeze the frozen cotton balls used for hemostasis after tooth extraction at a temperature of -20℃ to -18℃ for 4 to 6 hours; remove the frozen cotton balls and place them on the extraction site; have the patient bite down on the frozen cotton balls to apply pressure to the wound and apply a cold compress, thereby achieving rapid hemostasis.

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