Extensible bony expansion device

Abstract

The extendable bony expansion device comprises an expansion device main frame and a double-sided screw which is arranged at the center of the expansion device main frame and penetrates through the expansion device main frame in a threaded mode, the extension direction of the double-sided screw is perpendicular to the direction of the expansion device main frame, and the two ends of the double-sided screw are each sleeved with a base in a threaded mode; the arch expanding device main frame comprises fixing clamping pieces which are distributed at equal intervals, and the spiral springs are arranged between every two adjacent fixing clamping pieces and arranged on the double-sided screw in a sleeving mode; the spiral spring comprises a main nut and a sub-nut which is at least partially inserted into the main nut and matched with the main nut, and the sub-nut is fixedly inserted into the double-face screw in a penetrating mode. By extending the sliding rod, the maxillary width expansion amount is increased, maxillary stenosis is reduced, the expansion demand amount is large, when the palate cover is too narrow and a high arch cannot be put in, the expansion device is adjusted to adapt to a patient, the pain of implanting a planting nail into the patient again is avoided, and the expansion effect is enhanced.

Description

Technical Field

[0001] The present application relates to the technical field of medical devices, and more specifically, to an extendable bone expander. Background Art

[0002] The expander, also known as the dental arch expansion spiral, consists of an expander, a retaining clasp, a hyperbolic lip arch and a base. The treatment principle is as follows: place the expansion spiral spring in the appropriate position, enlarge the expander by rotating the spiral hole, and transmit the correction to the teeth and alveolar bone through the base to expand the width and length of the upper and lower dental arches.

[0003] Existing expanders are affected by their structure, resulting in limited expansion. If the patient's palate is too narrow, the high arch cannot accommodate the expander. If it is re-implanted, it will cause secondary damage to the patient. Summary of the invention

[0004] The present application provides an extendable bone expander, which aims to solve the problem in the background art that the existing expander cannot be adapted when the patient's palate is too narrow.

[0005] In order to achieve the above objectives, this application provides the following technical solutions:

[0006] An extendable bone expander comprises an expander main frame and a double-sided screw arranged at the center of the expander main frame and threadedly inserted, wherein the extension direction of the double-sided screw is perpendicular to the direction of the expander main frame, and a base is threadedly sleeved at both ends of the double-sided screw;

[0007] The expander main frame includes equidistantly distributed fixing cards, the coil spring is arranged between two adjacent fixing cards and sleeved on the double-sided screw; the coil spring includes a main nut and a sub-nut that is at least partially inserted into the main nut and adapted thereto, and the sub-nut is fixedly inserted on the double-sided screw.

[0008] In one embodiment of the present invention, two sliding rods are respectively arranged between the two bases and at both sides of the spiral spring, and the two sliding rods are respectively inserted through the two ends of the expander main frame.

[0009] In one embodiment of the present invention, the portions of the two slide bars located between two adjacent cards are symmetrically sleeved with screws, the screws are provided with secondary nuts, and the screws and the secondary nuts are coaxially arranged.

[0010] In one embodiment of the present invention, one end of the main nut is provided with an internal cavity with a hexagonal cross section, and the sub-nut has a hexagonal cross section that matches the internal cavity of the hexagonal groove of the main nut.

[0011] In one embodiment of the present invention, one end of each base away from the expander main frame is fixedly connected to a hyperbolic lip bow, and the ends of the hyperbolic lip bow away from the base are each connected to a retaining ring.

[0012] In one embodiment of the present invention, the slide bars on both sides of the spiral spring are symmetrically arranged, and the two slide bars are movably plugged into the two ends of the base respectively.

[0013] In one embodiment of the present invention, the double-sided screw is threadedly connected and fixed to the center of the base at both ends.

[0014] In one embodiment of the present invention, the outer portion of the screw is threadedly sleeved with a secondary nut, and one end of the secondary nut away from the screw is movably connected to the fixing card.

[0015] In one embodiment of the present invention, the length of the secondary nut is the same as the length of the main nut.

[0016] Beneficial effects of the present invention:

[0017] The extendable bone expander provided by the present invention can increase the width of the maxillary bone and the amount of expansion by extending the sliding rod, thereby reducing maxillary bony stenosis and requiring a large amount of expansion. When the palate is too narrow and the high arch cannot be placed, the expander can be adjusted to fit the patient, thereby avoiding the pain of re-implanting the implant screws and enhancing the expansion effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the extendable bone expander of the present invention;

[0019] Figure 2 This is a schematic diagram of the main nut structure;

[0020] Figure 3 for Figure 1 Enlarged structural diagram at A in the middle.

[0021] Figure numerals: 1- expander main frame; 11- fixing card; 12- spiral spring; 121- main nut; 122- hexagonal groove; 123- sub-nut; 13- slide rod; 131- secondary nut; 132- screw; 2- double-sided screw; 3- base; 4- hyperbolic lip bow; 5- retaining clamp. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0023] like Figure 1-3 As shown, the present invention provides an extendable bone expander, including an expander main frame 1 and a double-sided screw 2 installed at the center of the expander main frame 1 and threadedly inserted, the extension direction of the double-sided screw 2 is perpendicular to the direction of the expander main frame 1, and both ends of the double-sided screw 2 are respectively threadedly sleeved with a base 3, and the double-sided screw 2 is threadedly connected and fixed to the center of the base 3 at both ends.

[0024] According to the present invention, one end of each base 3 away from the expander main frame 1 is fixedly connected to a hyperbolic lip bow 4, and the ends of the hyperbolic lip bow 4 away from the base 3 are each connected to a retaining clamp 5.

[0025] Specifically, the expander main frame 1 includes fixed cards 11 arranged in parallel, and the coil spring 12 is arranged between two adjacent fixed cards 11 and sleeved on the double-sided screw 2. Preferably, the two fixed cards 11 are equidistantly distributed. The coil spring 12 is arranged between two adjacent fixed cards 11, mainly to limit the position of the sub-nut 123 when it rotates, so as to avoid deviation.

[0026] The center of the base 3 is threadedly sleeved with the double-sided screw 2. In the present invention, the thread surfaces at both ends of the double-sided screw 2 are bidirectional, and the principle is the same as that of the bidirectional screw.

[0027] Two slide bars 13 are respectively arranged between the two bases 3 and at the coil springs 12. The slide bars are arranged on the side of the fixed card away from the coil spring. The two slide bars 13 are respectively inserted through the fixed cards 11 of the expander main frame 1, and then the two ends are respectively movably plugged and fixed to the bases 3. The coil spring is arranged between the two fixed cards, mainly to limit the position of the sub-nut when it rotates to avoid deviation.

[0028] Preferably, the slide bars 13 on both sides of the coil spring 12 are symmetrically arranged.

[0029] like Figure 2 As shown, the coil spring 12 includes a main nut 121 and a sub-nut 123 which is at least partially inserted into the main nut 121 and matched therewith, and the sub-nut 123 is fixedly inserted into the double-sided screw 2. A hexagonal groove 122 is provided at one end of the main nut 121, and the cross section of the sub-nut 123 is hexagonal. The sub-nut 123 is inserted into the hexagonal groove 122 provided in the main nut 121, and the double-sided screw 2 and the sub-nut 123 are fixedly inserted.

[0030] Specifically, the hexagonal groove 122 opened on the inner side of the main nut 121 is an accommodating space for the sub-nut 123, and the hexagonal groove 122 is adapted to the shape of the hexagonal nut. The double-sided screw 2 is threadedly inserted into the main nut 121 and the sub-nut 123 in sequence. A small wrench adapted to the sub-nut 123 is used to rotate the sub-nut 123 and the double-sided screw 2, so that the symmetrically distributed base 3 can be expanded outward. The actual moving distance of the hexagonal groove 122 is the additional expanded distance, so as to adapt to the situation where the expansion distance is insufficient under special circumstances.

[0031] like Figure 3 As shown, the parts of the two sliding rods 13 located between two adjacent cards are symmetrically sleeved with screws 132, and the outer parts of the screws 132 are threadedly sleeved with secondary nuts 131. The screws 132 and the secondary nuts 131 are coaxially arranged, and the end of the secondary nuts 131 away from the screws 132 is movably connected to the fixed card 11.

[0032] Preferably, the length of the secondary nut 131 is the same as that of the main nut 121 .

[0033] In the present invention, the slide rod 13 installed on each fixed card 11 is plugged into the base 3 to limit the movement of the base 3, so as to prevent the base 3 from moving smoothly to achieve the expansion operation when the sub-nut 123 rotates with the double-sided screw 2.

[0034] It should be noted that the screw 132 is fixedly installed between the two fixed cards 11, and the two screws 132 are coaxially arranged with the sliding rods 13 at both ends of the fixed cards 11. The two fixed cards 11 each have a fixed screw 132 and a movably connected secondary nut 131. At the same time, the secondary nut 131 is threadedly connected with the screw 132. When the secondary nut 131 rotates, the two fixed cards 11 will be expanded to increase the expansion amount.

[0035] When in use, manually use a wrench compatible with the sub-nut 123 to clamp and twist the sub-nut 123, so that the sub-nut 123 rotates synchronously with the double-sided screw 2. At this time, the bases 3 on both sides expand outward at the same time. If the expansion amount is not enough and additional expansion is required, twist the two 131 sub-nuts at the same time. Before twisting the sub-nut 131, the screw 132 is located as a whole inside the sub-nut 131. After rotating the sub-nut 131, the screw 132 gradually extends outward. At this time, the main nut 121 gradually expands with the sub-nut 123. At this time, the distance extended by the screw 132 is the excess expansion amount.

[0036] The above is only a preferred specific implementation manner of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can make equivalent substitutions or changes according to the technical solution and concept of the present application within the technical scope disclosed in the present application, which should be covered by the protection scope of the present application.

Claims

1. An extendable bony expander, characterized in that: The invention comprises an expander main frame (1) and a double-sided screw (2) arranged at the center of the expander main frame (1) and threadedly inserted therein, wherein the extension direction of the double-sided screw (2) is perpendicular to the direction of the expander main frame (1), and a base (3) is respectively threadedly sleeved at both ends of the double-sided screw (2); The expander main frame (1) comprises equidistantly distributed fixing cards (11), and the spiral spring (12) is arranged between two adjacent fixing cards (11) and sleeved on the double-sided screw (2); The coil spring (12) comprises a main nut (121) and a sub-nut (123) which is at least partially inserted into the main nut (121) and matched therewith, and the sub-nut (123) is fixedly inserted on the double-sided screw (2).

2. The extendable bony expander according to claim 1, characterized in that: Two sliding rods (13) are respectively arranged between the two bases (3) and at the locations of the spiral springs (12). The two sliding rods (13) respectively penetrate through the two ends of the expander main frame (1).

3. The extendable bony expander according to claim 2, characterized in that: The parts of the two slide bars (13) located between two adjacent cards are symmetrically sleeved with screws (132), and the screws (132) are provided with secondary nuts (131). The screws (132) and the secondary nuts (131) are coaxially arranged.

4. The extendable bony expander according to claim 3, characterized in that: One end of the main nut (121) is provided with an internal cavity (122) with a hexagonal cross section, and the sub-nut (123) has a hexagonal cross section and is compatible with the internal cavity (122) of the hexagonal groove of the main nut (121).

5. The extendable bony expander according to claim 1, characterized in that: One end of each base (3) away from the expander main frame (1) is fixedly connected to a hyperbolic lip bow (4), and the ends of the hyperbolic lip bow (4) away from the base (3) are each connected to a retaining clamp (5).

6. The extendable bony expander according to claim 1, characterized in that: The slide bars (13) located on both sides of the spiral spring (12) are symmetrically arranged, and the two slide bars (13) are movably plugged into the two ends of the base (3) respectively.

7. The extendable bony expander according to claim 1, characterized in that: The double-sided screw (2) is threadedly connected and fixed to the center of the base (3) at both ends.

8. The extendable bony expander according to claim 1, characterized in that: The exterior of the screw (132) is threadedly sleeved with a secondary nut (131), and one end of the secondary nut (131) away from the screw (132) is movably connected to the fixing card (11).

9. The extendable bone expander according to any one of claims 1 to 8, characterized in that: The length of the secondary nut (131) is the same as that of the main nut (121).

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