Self-adjusting expander based on hydraulic transmission

Abstract

The present application relates to the technical field of oral orthodontic appliances, in particular to a self-adjusting arch expander based on hydraulic transmission, which comprises a jaw plate and a tooth sleeve, the tooth sleeve is arranged on the side wall of the jaw plate, and a liquid storage bag is arranged in the tooth sleeve; after the tooth sleeve is worn on the teeth, the liquid storage bag is on the occlusal surface of the teeth; the jaw plate comprises a first part and a second part which can move away from each other, a connecting pipe is arranged between the first part and the second part, and the two ends of the connecting pipe are arranged in the first part and the second part respectively; a piston is arranged in the connecting pipe, a push rod is arranged on the piston, and the push rod is connected with the first part and the second part, so that when the piston pushes the push rod to move, the first part and the second part are pushed away from each other; a one-way valve is arranged in the connecting pipe, and the liquid storage bag is communicated with the one-way valve. The present application can automatically expand the arch according to the occlusal force of the patient, and can adaptively adjust the size of the arch expansion force according to the size of the occlusal force of the patient, thereby improving the comfort and convenience of the patient after wearing.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of oral orthodontic appliances, and in particular to a self-adjusting arch expander based on hydraulic transmission. BACKGROUND

[0002] Dental arch constriction is one of the common oral malocclusion deformities, and the treatment method is usually that the patient wears an arch expander to expand the teeth after completing oral cleaning in leisure time. The currently commonly used arch expanders can be divided into:

[0003] Fixed arch expander: fixed on the teeth by bonding. This type of device has the following disadvantages: cannot be self-removed and worn, affecting oral cleaning; completely rigid structure, lacking physiological elasticity; easily irritating the oral mucosa; adjustment requires professional operation.

[0004] Traditional movable arch expander: has two jaw plates, a threaded rod and a guide rod between the two jaw plates, and a tooth sleeve on the edge of the jaw plate for connecting the teeth. After the tooth sleeve is sleeved on the teeth, the jaw plate is attached to the palate in the oral cavity, and the threaded rod is twisted to move the two jaw plates away from each other to expand the arch. Although it can be removed and worn, it has the following disadvantages: single expansion force and cannot be adjusted; lacks precise tooth positioning structure; bulky and poor comfort; unstable arch expansion effect.

[0005] Part of the arch expander part of the removable arch expander uses elastic materials (such as polyurethane resin) to improve comfort, but still relies on manual adjustment of the screw, and the rigid expansion force may cause damage to the periodontal tissue. SUMMARY

[0006] In order to realize automatic arch expansion and improve the comfort and convenience of the patient after wearing, the present application provides a self-adjusting arch expander based on hydraulic transmission.

[0007] The present application provides a self-adjusting arch expander based on hydraulic transmission, which adopts the following technical solutions:

[0008] A self-adjusting arch expander based on hydraulic transmission, comprising a jaw plate and a tooth sleeve, the tooth sleeve being arranged on the side wall of the jaw plate, and the tooth sleeve being provided with a liquid storage bag at the bottom end, the liquid storage bag being located on the occlusal surface of the teeth after the tooth sleeve is worn on the teeth;

[0009] The jaw plate comprises a first part and a second part that can move away from each other, and a connecting pipe is arranged between the first part and the second part, the first part and the second part are each provided with a mounting hole for accommodating the connecting pipe, and the two ends of the connecting pipe are respectively arranged in the first part and the second part;

[0010] The connecting pipe is provided with a piston, the piston is provided with a push rod, the push rod is connected with the first part and the second part, so that when the piston pushes the push rod to move, the first part and the second part are pushed away from each other.

[0011] In a specific embodiment, the connecting pipe is provided with a one-way valve, and the liquid storage bag is in communication with the one-way valve.

[0012] In a specific embodiment, the liquid storage bag is communicated with a conveying pipe, the conveying pipe is communicated with the inlet of the one-way valve, and the outlet of the one-way valve is directed to the piston.

[0013] In a specific embodiment, a guide rod is arranged between the first part and the second part, guide holes are arranged on the first part and the second part for inserting the guide rod, and the two ends of the guide rod are arranged in the first part and the second part respectively, and the length direction of the guide rod is parallel to the moving direction of the push rod.

[0014] In a specific embodiment, the hydraulic oil filled in the liquid storage bag is physiological saline or medical silicone oil.

[0015] In a specific embodiment, a partition plate is arranged in the connecting pipe, the partition plate divides the space in the connecting pipe into two chambers, and the liquid storage bag of the first part and the liquid storage bag of the second part are respectively communicated with different chambers.

[0016] In a specific embodiment, the jaw plate is made of medical-grade elastic resin.

[0017] In a specific embodiment, the material of the liquid storage bag includes nylon, polyether ether ketone and thermal resilient plastic.

[0018] In summary, the present application has the following advantages:

[0019] The occlusal force is used as a power source to realize the automatic treatment of "occlusion expansion", and realize self-driven arch expansion. The hydraulic buffer system is used, the liquid transmission is softer, the stress peak of the traditional mechanical structure is avoided, different patient needs are matched by adjusting the liquid viscosity, slide rail resistance and other parameters. Through biomechanical optimization + automatic adjustment, the comfort, safety and convenience of the arch expansion treatment are significantly improved, the metal screw parts are reduced, the manufacturing cost is reduced, and the present application has significant clinical popularization value. BRIEF DESCRIPTION OF DRAWINGS

[0020] Fig. 1 is a schematic diagram of the overall structure.

[0021] Fig. 2 is a sectional view showing the internal structure of the jaw plate.

[0022] Fig. 3 is a sectional view showing the internal structure of the liquid storage bag.

[0023] Explanation of reference numerals: 1, jaw plate; 11, first part; 12, second part; 2, tooth sleeve; 3, first liquid storage bag; 4, second liquid storage bag; 5, connecting pipe; 6, mounting hole; 7, delivery pipe; 8, first piston; 9, first push rod; 10, one-way valve; 13, second piston; 14, second push rod; 15, guide rod. DETAILED DESCRIPTION

[0024] The following Figs. 1-3 The application is further described in detail.

[0025] Reference Fig. 1 , the self-adjusting arch expander based on hydraulic transmission comprises a jaw plate 1 and a liquid storage bag connected with the jaw plate 1. The sidewall of the jaw plate 1 is fixed with a tooth sleeve 2, and the liquid storage bag is fixed at the bottom end of the tooth sleeve 2. After the tooth sleeve 2 is installed on the tooth, the liquid storage bag is on the occlusal surface of the tooth. The liquid storage bag is made of medical plastic, and in this embodiment, it is made of nylon. In some other embodiments, it can also be made of polyether ether ketone, hot resilient plastic (HPE) and the like.

[0026] Reference Fig. 2 and Fig. 3 The jaw plate 1 has a first part 11 and a second part 12. The first part 11 and the second part 12 are provided with a connecting pipe 5. The first part 11 and the second part 12 are both provided with a mounting hole 6 for inserting the connecting pipe 5. The connecting pipe 5 can slide in the mounting hole 6. The two ends of the connecting pipe 5 are respectively in the first part 11 and the second part 12. The first part 11 and the second part 12 can move away from each other along the length direction of the connecting pipe 5.

[0027] Reference Fig. 2 and Fig. 3 The connecting pipe 5 is communicated with the liquid storage bag through a delivery pipe 7 penetrating through the jaw plate 1 and the tooth sleeve 2. The connecting pipe 5 is provided with a piston and a push rod corresponding to the first part 11 and the second part 12. The piston is in the connecting pipe 5 and can slide along the length direction of the connecting pipe 5. The push rod is in the connecting pipe 5 and is connected with the jaw plate 1. Under the driving of the piston, the push rod can push the first part 11 and the second part 12 of the jaw plate 1 to move away from each other.

[0028] For the convenience of distinguishing, the first piston 8, the second piston 13 and the first push rod 9, the second push rod 14 are described respectively. The middle part of the connecting pipe 5 is provided with a partition plate, so that the chamber in the connecting pipe 5 is divided into two parts, and the first piston 8, the second piston 13 and the first push rod 9, the second push rod 14 are arranged in the two chambers on the two sides of the partition plate respectively. The liquid storage bag corresponding to the first part 11 and the second part 12 is also provided with two, for the convenience of distinguishing, the first liquid storage bag 3 and the second liquid storage bag 4 are described respectively. The first liquid storage bag 3 is communicated with the chamber where the first piston 8 is arranged through the conveying pipe 7, and the second liquid storage bag 4 is communicated with the chamber where the second piston 13 is arranged through the conveying pipe 7.

[0029] In the initial state, the first liquid storage bag 3 and the second liquid storage bag 4 are filled with hydraulic oil, and the hydraulic oil can be physiological saline, medical silicone oil and the like. Through the occlusion action, the first liquid storage bag 3 and the second liquid storage bag 4 are extruded, the hydraulic oil in the first liquid storage bag 3 and the second liquid storage bag 4 enters the connecting pipe 5 through the conveying pipe 7, and the hydraulic oil in the first liquid storage bag 3 pushes the first piston 8 to slide in the connecting pipe 5, so as to push the first push rod 9 to push the first part 11 of the jaw plate 1 away from the second part 12; the second liquid storage bag 4 can also push the second part 12 away from the first part 11, which will not be repeated here.

[0030] Referring to Fig. 2 It should be noted that the connecting pipe 5 is provided with a one-way valve 10, so that the hydraulic oil is difficult to flow back, that is, the conveying pipe 7 is directly communicated with the one-way valve 10, or the hydraulic oil entering the connecting pipe 5 passes through the one-way valve 10 first, and then pushes the piston to move in the connecting pipe 5 (in the figure, the one-way valve 10 is directly communicated with the conveying pipe 7). The arrangement of the one-way valve 10 makes it difficult for the hydraulic oil to flow back after passing through the one-way valve 10, so as to maintain the pushing force on the piston, so that the push rod can maintain the expansion of the first part 11 and the second part 12 after pushing, thereby maintaining the expansion effect on the teeth.

[0031] There are also some patients with asymmetric dental arches, and in the process of orthodontic treatment by using the traditional expander, the rigid expansion may cause the periodontal tissue on one side to be damaged under the action of the expansion force. In the present application, since the patient performs expansion by occlusion, even if the occlusion force is uneven due to the asymmetry of the dental arch, that is, the patient occludes the first liquid storage bag 3 and the second liquid storage bag 4, the occlusion force applied on the first liquid storage bag 3 and the second liquid storage bag 4 is different, so that the amount of hydraulic oil delivered by the first liquid storage bag 3 and the second liquid storage bag 4 into the connecting pipe 5 is different, but the pushing force applied on the teeth by the jaw plate 1 through the tooth sleeve 2 is always uniformly applied on the teeth on both sides. The patient can stop the expansion in time according to the feeling, and realize the self-adaptive expansion according to the feeling of the patient. Compared with the symmetric and rigid expansion force of the traditional expander, the expansion force adaptively applied by the patient's occlusion action in the present application can effectively avoid the damage to the periodontal tissue during the expansion.

[0032] And because the patient has two sides of the bite force is uneven, it means that the patient wants to expand the arch to complete the entire arch expansion effect, need to adjust the two sides of the bite in the process, otherwise in one side of the piston moves to the end of the stroke, the other side of the piston is still in the stroke, that is, the first piston 8 moves to the end of the stroke, the second piston 13 is still in the stroke, can be further moved away from the first piston 8 direction. Thus, through the arch expander of the application, the patient can adjust his own bite form during orthodontic treatment, and correct the wrong bite form caused by the asymmetry of the dental arch.

[0033] Referring to Fig. 2 , a guide rod 15 is arranged between the first part 11 and the second part 12, and guide holes are formed in the first part 11 and the second part 12 for the guide rod 15 to be inserted, so that the guide rod 15 can slide in the guide holes, and the two ends of the guide rod 15 are respectively in the first part 11 and the second part 12. The length direction of the connecting pipe 5 is parallel to the length direction of the guide rod 15, so that the stroke of the push rod is parallel to the guide rod 15, and the mutual separation of the first part 11 and the second part 12 is guided.

[0034] It can be understood that the guide rod 15 is only one form of guiding the mutual separation between the first part 11 and the second part 12, and in some other embodiments, a guide rail or the like structure can also be provided, which is not limited in the application.

[0035] In order to more accurately adapt to different patients, when manufacturing the arch expander, the bite force required when expanding the arch can be controlled by adjusting the viscosity of the hydraulic oil; the speed of the relative sliding between the guide rod 15 and the first part 11 and the second part 12 can be adjusted by adjusting the roughness of the guide rod 15; the hardness of the jaw plate 1 can be adjusted by adjusting the material of the jaw plate 1, so as to adapt to patients of different ages. In the embodiment, the jaw plate 1 is made of medical-grade elastic resin, such as polyurethane or polyether ether ketone (PEEK).

[0036] The implementation principle of the embodiment of the application is that: the patient installs the arch expander in the oral cavity through the tooth sleeve 2 and the jaw plate 1 when he is at leisure, such as before going to bed, after cleaning the oral cavity. The patient applies pressure to the first liquid storage bag 3 and the second liquid storage bag 4 through the bite, so that the first piston 8 and the second piston 13 move away from each other, thereby pushing the first part 11 and the second part 12 of the jaw plate 1 away from each other through the first push rod 9 and the second push rod 14, and stopping the bite to make the first part 11 and the second part 12 expand the arch with the current expansion force. After the first piston 8 and the second piston 13 all move to the end of the stroke, go to the next visit.

[0037] The above are preferred embodiments of the present application, and do not limit the protection scope of the present application, so: any equivalent changes made according to the structure, shape, principle of the present application should be covered within the protection scope of the present application.

Claims

1. A self-adjusting bow expander based on hydraulic transmission, comprising a jaw plate (1) and a toothed sleeve (2), wherein the toothed sleeve (2) is disposed on the side wall of the jaw plate (1), characterized in that: The bottom end of the tooth sleeve (2) is provided with a liquid reservoir. After the tooth sleeve (2) is worn on the teeth, the liquid reservoir is located on the occlusal surface of the teeth. The jaw plate (1) includes a first part (11) and a second part (12) that can be separated from each other. A connecting tube (5) is provided between the first part (11) and the second part (12). The first part (11) and the second part (12) are each provided with a mounting hole (6) for accommodating the connecting tube (5). The two ends of the connecting tube (5) are respectively inside the first part (11) and the second part (12). A piston is provided inside the connecting pipe (5), and a push rod is provided on the piston. The push rod is connected to the first part (11) and the second part (12), so that when the piston pushes the push rod to move, it pushes the first part (11) and the second part (12) away from each other. The connecting pipe (5) is equipped with a one-way valve (10), and the liquid storage bladder is connected to the one-way valve (10); The reservoir is connected to a delivery pipe (7), which is connected to the inlet of the one-way valve (10), and the outlet of the one-way valve (10) faces the piston.

2. The self-adjusting bow expander based on hydraulic transmission according to claim 1, characterized in that: A guide rod (15) is provided between the first part (11) and the second part (12). Both the first part (11) and the second part (12) have guide holes for inserting the guide rod (15). The two ends of the guide rod (15) are respectively located in the first part (11) and the second part (12). The length direction of the guide rod (15) is parallel to the moving direction of the push rod.

3. The self-adjusting bow expander based on hydraulic transmission according to claim 1, characterized in that: The hydraulic oil filled into the reservoir is physiological saline or medical silicone oil.

4. The self-adjusting bow expander based on hydraulic transmission according to claim 1, characterized in that: The connecting tube (5) is provided with a partition, which divides the space inside the connecting tube (5) into two chambers. The liquid storage bladder of the first part (11) and the liquid storage bladder of the second part (12) are respectively connected to different chambers.

5. The self-adjusting bow expander based on hydraulic transmission according to claim 1, characterized in that: The jaw plate (1) is made of medical-grade elastic resin.

6. The self-adjusting bow expander based on hydraulic transmission according to claim 1, characterized in that: The reservoir is made of materials including nylon, polyetheretherketone (PEEK) and heat-resilience plastic.

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