A rodent experimental oral mouth opener for posterior teeth
By designing an oral mouth opener for rodent posterior tooth experiments, using a combination of medical-grade silicone and stainless steel, the problem of insufficient protection of the oral mucosa by rodent mouth openers was solved, achieving efficient and stable experimental operation.
Patent Information
- Application Number
- CN202520648520.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-08
- Publication Date
- 2026-05-29
- Estimated Expiration
- 2035-04-08
AI Technical Summary
Existing rodent mouth opening devices lack effective protection for the oral mucosa, leading to mucosal damage or inflammation, increasing operational complexity and reducing experimental success rates.
Design an oral cavity opening device for rodent posterior tooth experiments, comprising a posterior tooth occlusal pad, a buccal mucosa protective pad, an extraoral connecting rod, a lingual concave connecting rod, and a coiled open spring. Made of medical-grade silicone and stainless steel, it ensures the protection and stability of oral tissues.
It effectively protects the oral tissues of rodents, reduces damage, improves experimental success rate and ease of operation, is suitable for long-term experimental operations, and reduces costs.
Smart Images
Figure CN224292048U_ABST
Abstract
Description
Technical Field
[0001] This exemplary embodiment belongs to the field of medical device technology and relates to an oral cavity opening device for testing posterior teeth of rodents. Background Technology
[0002] Rodents (such as rats and mice) play a vital role in endodontic research and are commonly used laboratory animals. They are widely used not only because of their low cost and ease of acquisition, but also because their tooth structure is similar to that of humans, especially the posterior teeth, providing ideal animal models for endodontic research. Rodents are frequently used in the research and exploration of treatment options for diseases such as periapical periodontitis, pulpitis, and dentin hypersensitivity, offering irreplaceable advantages.
[0003] However, the relatively small oral cavity and limited field of vision in rodents make it extremely difficult to fully expose relevant tissues during intraoral procedures. In various experimental procedures, such as pulpectomy and root canal treatment, researchers must carefully expose the teeth and surrounding structures to ensure the precision of the procedure and the reliability of the experimental results. Therefore, effectively exposing relevant areas within the oral cavity without damaging oral tissues is a pressing technical challenge that needs to be addressed.
[0004] Most rodent mouth openers currently available on the market are made of bent steel wire. While these traditional tools have some use, they also have several shortcomings. For example, existing mouth openers often lack effective protection for the oral mucosa, which may lead to mucosal damage or inflammation, thus affecting the stability and accuracy of experiments. Furthermore, using these mouth openers often requires the assistance of other experimental instruments such as needle holders and forceps, increasing the complexity of the procedure and reducing the success rate of experiments.
[0005] Therefore, developing a novel rodent mouth opener that can provide a better field of vision while ensuring the safety of the oral mucosa and reducing damage to oral tissues will significantly promote research in endodontics. Utility Model Content
[0006] The exemplary embodiments disclosed herein address the problem that existing mouth openers lack protection for the oral mucosa by providing a mouth opener for rodent posterior tooth experiments, which can effectively expose relevant parts of the oral cavity without damaging oral tissues.
[0007] An exemplary embodiment of this disclosure provides an oral cavity opening device for rodent posterior tooth experiments, including two posterior tooth occlusal pads 2, each posterior tooth occlusal pad 2 being connected to one end of a buccal mucosa protection pad 1, the other end of the buccal mucosa protection pad 1 being connected to an extraoral connecting rod 4, a lingual concave connecting rod 3 being provided at one end near the corner of the mouth between the two extraoral connecting rods 4, and a coiled open curved spring 5 being provided at the other end.
[0008] The heights of the posterior occlusal pad 2 and the buccal mucosa protector 1 are determined based on the interfacial distance of the third molar when the rodent opens its mouth to its maximum extent.
[0009] The external connecting rod 4 is an L-shaped connecting rod with an included angle greater than 90°.
[0010] The angle between the posterior occlusal pad 2 and the buccal mucosa protector 1 is less than 90°.
[0011] The posterior occlusal pad 2 is a protective pad made of medical-grade silicone.
[0012] The buccal mucosa protector 1 is a medical-grade silicone material.
[0013] Both the external connecting rod 4 and the tongue-side concave connecting rod 3 are made of stainless steel; the coiled large-diameter spring 5 is made of stainless steel.
[0014] The posterior occlusal pad 2 and the buccal mucosa protector 1 are integrally formed.
[0015] The other end of the buccal mucosa protector 1 is fixedly connected to the external oral connecting rod 4 by welding or gluing.
[0016] Between the two external connecting rods 4, one end near the corner of the mouth is fixedly connected to the tongue-side concave connecting rod 3 by welding or gluing, and the other end is fixedly connected to the coiled open spring 5 by welding or gluing.
[0017] Compared with the mouth openings of other rodents, the novel device used in this experiment has the following beneficial effects:
[0018] The oral mouth opener of this exemplary embodiment provides effective protection and support for the posterior tooth region of rodents by incorporating a posterior occlusal pad and a buccal mucosa protector. The posterior occlusal pad shifts the point of support posteriorly to the third molar and its posterior region, avoiding obstruction of the posterior tooth surgical area. The buccal mucosa protector covers the buccal mucosa as much as possible, preventing damage to the buccal mucosa by the bur. An extraoral connecting rod is provided to avoid the oral cavity, facilitating the entry of modeling instruments. A lingual concave connecting rod helps fix the tongue, preventing damage to the lingual mucosa due to improper fixation of the tongue tissue. A coiled, large-diameter spring provides elastic support, maintaining the open position and reducing animal fatigue. This oral mouth opener is suitable for long-term experimental operations, possesses good stability and flexibility, and can effectively cooperate with other experimental tools to improve the success rate of experiments. At the same time, the oral mouth opener is easy to operate, ensuring efficiency and accuracy during the experimental process.
[0019] Furthermore, determining the height of the posterior occlusal pad and buccal mucosa protector can ensure the fit between the oral mouth opener and the animal's oral cavity; avoid excessive pressure or insufficient support due to improper height, and protect the animal's oral health.
[0020] Furthermore, the included angle of the L-shaped connecting rod is greater than 90°, avoiding the oral cavity area, which facilitates the use of the oral cavity opening device and the modeling instrument.
[0021] Furthermore, the angle between the posterior occlusal pad and the buccal mucosa protective pad is less than 90°, which conforms to the oral anatomy of rodents, improves the fit of the oral opening device, and enhances stability and comfort.
[0022] Furthermore, both the posterior occlusal pad and the buccal mucosa protector are made of medical-grade silicone. Medical-grade silicone is soft, elastic, and resistant to high-temperature sterilization, making it suitable for repeated use and reducing experimental costs. The extraoral connecting rod, the lingual concave connecting rod, and the coiled opening spring are all made of stainless steel. Stainless steel is high-strength and corrosion-resistant, ensuring the durability and stability of the oral mouth opener.
[0023] Furthermore, the posterior occlusal pad and the buccal mucosa protector are integrally molded; the fixed connection between the buccal mucosa protector, the lingual concave connecting rod, the extraoral connecting rod, and the coiled open spring is all designed to improve the stability of the oral mouth opener, reduce the loosening or dislodgement of the oral mouth opener during the experiment, and provide operational precision. Attached Figure Description
[0024] To more clearly illustrate the technical solutions of the exemplary embodiments of this disclosure, the accompanying drawings used in the embodiments will be briefly described below. It should be understood that the following drawings only show some embodiments of the exemplary embodiments of this disclosure and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.
[0025] Figure 1 This is a front view of the oral cavity opener provided in an exemplary embodiment of this disclosure;
[0026] Figure 2 This is a top view of the oral cavity opener provided in an exemplary embodiment of this disclosure;
[0027] Figure 3 This is a side view of an oral cavity opener provided in an exemplary embodiment of this disclosure;
[0028] Among them, 1. buccal mucosa protector; 2. posterior occlusal pad; 3. lingual concave connecting rod; 4. extraoral connecting rod; 5. coiled open spring. Detailed Implementation
[0029] To make the objectives, technical solutions, and advantages of the exemplary embodiments of this disclosure clearer, the technical solutions in the exemplary embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the exemplary embodiments of this disclosure. The components of the exemplary embodiments of this disclosure described and shown in the accompanying drawings can typically be arranged and designed in various different configurations.
[0030] Therefore, the following detailed description of exemplary embodiments of the present disclosure provided in the accompanying drawings is not intended to limit the scope of the claimed exemplary embodiments of the present disclosure, but merely to illustrate selected embodiments of the exemplary embodiments of the present disclosure. All other embodiments obtained by those skilled in the art based on the embodiments of the exemplary embodiments of the present disclosure without inventive effort are within the scope of protection of the exemplary embodiments of the present disclosure.
[0031] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.
[0032] In the description of exemplary embodiments of this disclosure, it should be noted that the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "middle," "vertical," "horizontal," "lateral," and "longitudinal," indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, or the orientation or positional relationships commonly used when the product of the exemplary embodiments of this disclosure is in use, are only for the convenience of describing the exemplary embodiments of this disclosure 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 on the exemplary embodiments of this disclosure. Furthermore, the terms "first," "second," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.
[0033] Furthermore, the use of the term "horizontal" does not imply that the component must be absolutely horizontal, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.
[0034] In the description of exemplary embodiments of this disclosure, it should also be noted that, unless otherwise expressly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in exemplary embodiments of this disclosure according to the specific circumstances.
[0035] The exemplary embodiments of this disclosure will be further described below with reference to the accompanying drawings:
[0036] Please combine participation Figure 1 , Figure 2 , Figure 3 This exemplary embodiment provides an oral cavity opening device for rodent posterior tooth experiments, comprising: two buccal mucosa protectors 1, two posterior tooth occlusal pads 2, a lingual concave connecting rod 3, two extraoral connecting rods 4, and a coiled open-end spring 5; the posterior tooth occlusal pads 2 are placed in the regions of the third molars on both sides; each posterior tooth occlusal pad 2 is connected to one end of a buccal mucosa protector 1, the buccal mucosa protector 1 being located on the buccal side of the posterior teeth on both sides, covering the buccal mucosa on both sides, and extending to the corner of the mouth; the other end of the buccal mucosa protector 1 is connected to the extraoral connecting rod 4, and a lingual concave connecting rod 3 is provided at one end near the corner of the mouth between the two extraoral connecting rods 4, and a coiled open-end spring 5 is provided at the other end.
[0037] In some exemplary embodiments, the heights of the posterior occlusal pad 2 and the buccal mucosa protector 1 are determined based on the interfacial distance of the third molar when the rodent's mouth is fully open.
[0038] In some exemplary embodiments, the external connecting rod 4 is an L-shaped connecting rod with an included angle greater than 90°; the included angle of the L-shaped connecting rod faces the corner of the mouth, thereby opening the oral cavity.
[0039] In some exemplary embodiments, the posterior occlusal pad 2 is integrally formed with the buccal mucosa protector 1; the angle between the posterior occlusal pad 2 and the buccal mucosa protector 1 is less than 90°.
[0040] In some exemplary embodiments, the posterior occlusal pad 2 is a protective pad made of medical-grade silicone. The buccal mucosa protective pad 1 is a protective pad made of medical-grade silicone.
[0041] Both the external connecting rod 4 and the tongue-side concave connecting rod 3 are made of stainless steel; the coiled large-diameter spring 5 is made of stainless steel.
[0042] In some exemplary embodiments, the other end of the buccal mucosa protector 1 is fixedly connected to the extraoral connecting rod 4; between the two extraoral connecting rods 4, one end near the corner of the mouth is fixedly connected to the tongue-side concave connecting rod 3, and the other end is fixedly connected to the coiled open-end spring 5. The fixed connection can be achieved by welding or gluing.
[0043] The posterior occlusal pad 2 is typically placed in the third molar region and is the pad that comes into direct contact with the patient during biting. The posterior occlusal pad 2 can distribute occlusal pressure, preventing tooth damage caused by prolonged mouth opening or tension in animals. It can also buffer occlusal forces, relieving pressure on the masticatory muscles and temporomandibular joint, reducing fatigue during treatment. Furthermore, it can fix the position of the mouth opener, prevent slippage, and ensure a clear operating field of vision. It also prevents accidental biting by animals, which could damage the mouth opener or oral instruments.
[0044] The buccal mucosa protector 1 is usually in close contact with the buccal mucosa to isolate the instruments from the oral soft tissues, prevent the instruments from rubbing or pressing on the mucosa during treatment, and reduce the risk of infection. It can also help stabilize the oral instruments and prevent them from sliding or shifting. It can also cushion the pressure of the instruments on the buccal mucosa, improve comfort, and is especially suitable for long-term treatment. It provides the operator with a clear field of vision and operating space, and avoids the treatment being affected by mucosal interference.
[0045] The specific usage process of the rodent posterior tooth opening device provided in this exemplary embodiment is as follows:
[0046] First, under anesthesia, open the rodent's mouth and place the posterior occlusal pad 2 at the third molar, ensuring that the buccal mucosa protector 1 completely covers the buccal mucosa. Then, ensure that the lingual concave connecting rod 3 is located on the lingual side of the incisor, pull out the tongue tip, and place it between the lingual concave connecting rod 3 and the incisor to ensure the tongue is fixed. After ensuring a good view of the posterior teeth, model construction can begin.
[0047] The above embodiments are only used to illustrate the technical solutions of the exemplary embodiments of this disclosure and are not intended to limit them. Although the exemplary embodiments of this disclosure have been described in detail with reference to the above embodiments, those skilled in the art can still modify or make equivalent substitutions to the specific implementation of the exemplary embodiments of this disclosure. Any modifications or equivalent substitutions that do not depart from the spirit and scope of the exemplary embodiments of this disclosure are within the protection scope of the claims of the exemplary embodiments of this disclosure pending approval.
Claims
1. A mouth opening device for testing the posterior teeth of rodents, characterized in that, It includes two posterior occlusal pads (2), each of which is connected to one end of a buccal mucosa protector (1), and the other end of the buccal mucosa protector (1) is connected to an extraoral connecting rod (4). A lingual concave connecting rod (3) is provided at one end near the corner of the mouth between the two extraoral connecting rods (4), and a coiled open curved spring (5) is provided at the other end.
2. The oral cavity opening device for testing posterior teeth of rodents according to claim 1, characterized in that, The heights of the posterior occlusal pad (2) and the buccal mucosa protector (1) are determined based on the distance between the third molars and the jaws when the rodent opens its mouth to its maximum extent.
3. The oral cavity opening device for testing posterior teeth of rodents according to claim 1, characterized in that, The external connecting rod (4) is an L-shaped connecting rod with an included angle greater than 90°.
4. The oral cavity opening device for testing posterior teeth of rodents according to claim 1, characterized in that, The angle between the posterior occlusal pad (2) and the buccal mucosa protector (1) is less than 90°.
5. The oral cavity opening device for testing posterior teeth of rodents according to claim 1, characterized in that, The posterior occlusal pad (2) is a protective pad made of medical silicone material.
6. The oral cavity opening device for testing posterior teeth of rodents according to claim 1, characterized in that, The buccal mucosa protectant (1) is a medical silicone material.
7. The oral cavity opening device for testing posterior teeth of rodents according to claim 1, characterized in that, The external connecting rod (4) and the tongue-side concave connecting rod (3) are both made of stainless steel; the coiled large-diameter spring (5) is made of stainless steel.
8. The oral cavity opening device for testing posterior teeth of rodents according to claim 1, characterized in that, The posterior occlusal pad (2) and the buccal mucosa protector (1) are integrally formed.
9. The oral cavity opening device for testing posterior teeth of rodents according to claim 1, characterized in that, The other end of the buccal mucosa protector (1) is fixedly connected to the extraoral connecting rod (4) by welding or adhesive bonding.
10. The oral cavity opening device for testing posterior teeth of rodents according to claim 1, characterized in that, Between the two external connecting rods (4), one end near the corner of the mouth is fixedly connected to the tongue-side concave connecting rod (3) by welding or gluing, and the other end is fixedly connected to the coiled open spring (5) by welding or gluing.