Mandibular protrusion measuring device and mandibular advancement appliance assisted preparation device

Abstract

The utility model relates to a kind of mandibular protrusion measuring device and mandibular advancement appliance auxiliary preparation device, with relatively arranged proximal end and distal end, including upper teeth fixing part, lower teeth fixing part and locking part;The upper teeth fixing part and the lower teeth fixing part are relatively slidingly connected, and the distal end of the upper teeth fixing part and the lower teeth fixing part is respectively provided with upper teeth fixing groove, lower teeth fixing groove;The locking part is installed on the upper teeth fixing part and / or the lower teeth fixing part, and is used to realize the lower teeth fixing part relative to the upper teeth fixing part sliding or locking;Further including push-pull part, the push-pull part is located at the proximal end of the lower teeth fixing part;The push-pull part has force surface towards the distal end, with the advantage of facilitating operator operation, increasing the accuracy of user mandibular protrusion distance measurement.

Description

Technical Field

[0001] This utility model relates to the technical field of medical auxiliary equipment, and in particular to a mandibular protrusion measuring device and a mandibular advancement appliance auxiliary preparation device. Background Technology

[0002] A mandibular advancement appliance is an orthodontic appliance used to treat obstructive sleep apnea syndrome (OSAHS) and snoring. It primarily works by moving the mandible forward to increase the airway space in the glossopharynx and palatopharynx, improving ventilation and thus reducing sleep apnea and snoring. Mandibular advancement appliances are typically custom-made to fit individual users; therefore, ensuring structural precision is crucial.

[0003] For example, the mandibular protrusion distance measuring device disclosed in Chinese Patent No. CN103565439B specifically discloses structures such as an external fixator for the upper teeth, an internal fixator for the upper teeth, a fixator for the lower teeth, and a ruler, so as to realize the measurement of the maximum mandibular protrusion distance of the user.

[0004] However, the above-mentioned method requires the use of external and internal fixation devices for the upper teeth to achieve fixation. In actual operation, the upper teeth may exert certain forces on the external and internal fixation devices, which can easily lead to locking failure and affect the accurate measurement of mandibular protrusion distance. In addition, adjusting the mandibular fixation device is relatively difficult, which is not conducive to the operation of the operator. Utility Model Content

[0005] The technical problem to be solved by this utility model is to overcome the defects in the prior art, thereby providing a mandibular protrusion measuring device and a mandibular advancement orthodontic appliance auxiliary preparation device.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A mandibular protrusion measuring device has a proximal end and a distal end arranged opposite to each other, including an upper tooth fixation member, a lower tooth fixation member, and a locking part; the upper tooth fixation member and the lower tooth fixation member are slidably connected relative to each other, and the distal ends of the upper tooth fixation member and the lower tooth fixation member are respectively provided with upper tooth fixing groove and lower tooth fixing groove; the locking part is installed on the upper tooth fixation member and / or the lower tooth fixation member, and is used to realize the sliding or locking of the lower tooth fixation member relative to the upper tooth fixation member; it also includes a push-pull part, which is located at the proximal end of the lower tooth fixation member; the push-pull part has a force-applying surface toward the distal end.

[0008] Preferably, the push-pull portion further includes a thrust ramp and an arc surface; the thrust ramp faces the proximal end and is connected to the force-applying surface through the arc surface.

[0009] Preferably, a vertical plane is provided, and the center line of the projection of the upper tooth fixing groove in the vertical direction is located on the vertical plane; the center line of the projection of the lower tooth fixing groove in the vertical direction is located on the vertical plane.

[0010] Preferably, it further includes a centering groove, which is disposed on the lower tooth fixing member and extends from the lower tooth fixing groove toward the proximal end, and the central axis of the centering groove is located on the vertical plane;

[0011] And / or,

[0012] It also includes a centering groove, which is disposed on the upper tooth fixing member and extends from the upper tooth fixing groove toward the proximal end, and the central axis of the centering groove is located on the vertical plane.

[0013] Preferably, it further includes a plug portion, which is disposed at the distal end of the maxillary fixation member and is used to engage with the occlusal member.

[0014] The central axis of the plug is located on the vertical plane.

[0015] Preferably, the insertion portion has a first stepped limiting surface, and the engaging member has a second stepped limiting surface, with the first stepped limiting surface abutting against the second stepped limiting surface.

[0016] Preferably, the lower tooth fixation member and the upper tooth fixation member are detachably connected;

[0017] The lower tooth fixing member is provided in several parts, and when different lower tooth fixing members are installed on the upper tooth fixing member, the minimum height from the upper tooth fixing groove to the lower tooth fixing groove is different.

[0018] Preferably, the upper tooth fixing member has a sliding groove at the end opposite to the upper tooth fixing groove, and the sliding groove is open at the end opposite to the upper tooth fixing groove;

[0019] The lower tooth fixing member is slidably installed in the groove at one end away from the lower tooth fixing groove, and the other end protrudes out of the groove.

[0020] The inner wall of the groove is provided with at least one limiting protrusion extending from the proximal end to the distal end, and the limiting protrusion is slidably connected to the limiting groove provided on the lower tooth fixing member.

[0021] Preferably, it further includes a measuring unit disposed between the upper tooth fixation member and the lower tooth fixation member to measure the relative sliding distance between them;

[0022] The measuring part includes a scale line and an indicator line, one of which is disposed on the side wall of the upper tooth fixation member and the other is disposed on the side wall of the lower tooth fixation member.

[0023] An auxiliary device for preparing a mandibular advancement appliance includes an occlusal element and a mandibular protrusion measuring device as described above; the occlusal element is detachably connected to the mandibular protrusion measuring device.

[0024] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0025] This utility model provides a mandibular protrusion measuring device. The upper and lower dental fixations are connected by relative sliding. When the locking part 3 is released, the upper and lower dental fixations can slide relative to each other, facilitating the measurement of the user's longest mandibular protrusion. Simultaneously, the upper dental fixation includes an upper dental fixing groove, and the lower dental fixation includes a lower dental fixing groove, thereby increasing the accuracy of the relative positioning of the user's upper teeth (i.e., upper incisors) and lower teeth (i.e., lower incisors), avoiding misalignment along the plane or changes in the position of the upper teeth during measurement that could affect the accuracy of the measurement of the maximum mandibular extension length. Furthermore, by providing a push-pull part on the lower dental fixation with a force-applying surface facing distally, the operator can easily adjust the upper dental fixation, enabling the operator to assist the user in measuring the longest distance of mandibular protrusion. The push-pull part is located proximal to the mandibular fixation piece, while the upper and lower fixation slots are located distal to the upper and lower fixation pieces, respectively. This creates sufficient operating space to prevent interference with the user's oral cavity during operation, ensuring both measurement accuracy and user experience. Correspondingly, the mandibular advancement appliance preparation aid device provided by this invention, including the aforementioned mandibular protrusion measuring device, increases positioning accuracy and ensures the manufacturing precision of the mandibular advancement appliance. Attached Figure Description

[0026] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0027] Figure 1 This is a schematic diagram of one example of the mandibular protrusion measuring device provided by this utility model.

[0028] Figure 2 for Figure 1 A cross-sectional diagram.

[0029] Figure 3 for Figure 1 An explosion diagram.

[0030] Figure 4 for Figure 3 A schematic diagram showing the connection between the mandibular fixation piece and the occlusal region.

[0031] Figure 5 for Figure 4 An enlarged view of position D1 in the middle.

[0032] Figure 6 for Figure 1 Front view diagram.

[0033] Figure 7 for Figure 6 An enlarged view of position D2 in the middle.

[0034] Figure 8 This is a schematic diagram of the structure of a lower tooth fixing component of one of the thicknesses.

[0035] Figure 9 This is a schematic diagram of a lower tooth fixing component of another thickness.

[0036] Figure 10 A schematic diagram of one example of the auxiliary preparation device for mandibular advancement appliance provided by the utility model.

[0037] Explanation of reference numerals in the attached figures:

[0038] 1. Upper tooth fixing component; 11. Upper tooth fixing groove; 12. Sliding groove; 2. Lower tooth fixing component; 21. Lower tooth fixing groove; 3. Locking part; 31. Threaded hole; 32. Locking screw; 4. Push-pull part; 41. Force application surface; 42. Thrust slope; 43. Arc surface; 5. Centering groove; 6. Insertion part; 61. First limiting plate; 62. Second limiting plate; 7. Limiting protrusion; 8. Limiting groove; 9. Measuring part; 91. Scale line; 92. Indicator mark; 100. Engaging component; 101. First U-shaped limiting plate; 102. Second U-shaped limiting plate. Detailed Implementation

[0039] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0040] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model 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 utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0041] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" 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 this utility model based on the specific circumstances.

[0042] See Figures 1 to 9 This utility model provides a mandibular protrusion measuring device, which has a proximal end and a distal end arranged opposite to each other. The mandibular protrusion measuring device includes an upper tooth fixation member 1, a lower tooth fixation member 2, and a locking part 3. The upper tooth fixation member 1 and the lower tooth fixation member 2 are slidably connected relative to each other. The distal ends of the upper tooth fixation member 1 and the lower tooth fixation member 2 are respectively provided with an upper tooth fixing groove 11 and a lower tooth fixing groove 21. The locking part 3 is installed on the upper tooth fixation member 1 and is used to realize the sliding or locking of the lower tooth fixation member 2 relative to the upper tooth fixation member 1.

[0043] It is easy to understand that in the above scheme, the upper tooth fixation component 1 and the lower tooth fixation component 2 are relatively slidably connected. When the locking part 3 is released, the upper tooth fixation component 1 and the lower tooth fixation component 2 can slide relative to each other, which facilitates the measurement of the longest protrusion length of the user's mandible. At the same time, the upper tooth fixation component 1 includes an upper tooth fixing groove 11 and the lower tooth fixation component 2 includes a lower tooth fixing groove 21, which can increase the accuracy of the relative positioning of the user's upper teeth (i.e., upper incisors) and lower teeth (i.e., lower incisors), and avoid the two from being misaligned in the plane direction or the position of the upper teeth changing during the measurement process, which would affect the accuracy of the measurement of the maximum extension length of the mandible.

[0044] Of course, in other embodiments, the locking part 3 can also be installed on the lower tooth fixing member 2, or it can be provided on both the upper tooth fixing member 1 and the lower tooth fixing member 2, so as to control the locking (even if the upper tooth fixing member 1 and the lower tooth fixing member 2 are relatively fixed) or loosening (even if the upper tooth fixing member 1 and the lower tooth fixing member 2 can slide relative to each other).

[0045] Furthermore, the mandibular protrusion measuring device also includes a push-pull portion 4, which is located at the proximal end of the mandibular fixation member 2; the push-pull portion 4 has a force-applying surface 41 facing distally.

[0046] It is easy to understand that by providing a push-pull part 4 on the lower tooth fixation piece 2, and having a force-applying surface 41 facing distally, the operator can easily adjust the upper tooth fixation piece 1, enabling the operator to assist the user in measuring the longest distance of mandibular protrusion. The push-pull part 4 is located proximally to the lower tooth fixation piece 2, while the upper tooth fixation slot 11 and lower tooth fixation slot 21 are located distally to the upper tooth fixation piece 1 and lower tooth fixation piece 2, respectively. This creates sufficient operating space to avoid interference with the user's oral cavity during the operator's operation, ensuring measurement accuracy while enhancing the user's experience.

[0047] It is worth noting that the "proximal end" refers to the end relatively closer to the operator, while the "distal end" refers to the end relatively farther away from the operator. Therefore, it is easy to understand that the "user" is the person being measured, and the "operator" is the person performing the operating procedures.

[0048] To further enhance user comfort, the push-pull part 4 also includes a thrust ramp 42 and an arc surface 43; the thrust ramp 42 faces the proximal end and is connected to the force application surface 41 through the arc surface 43.

[0049] See Figures 1 to 3 A vertical plane is provided (see Figure 3 The center line of the projection of the upper tooth fixing groove 11 in the vertical direction (i.e., along the Y direction) lies on the vertical plane; the center line of the projection of the lower tooth fixing groove 21 in the vertical direction lies on the vertical plane. It is easy to understand that this vertical plane (i.e., the X plane) is the central plane of the mandibular protrusion measuring device, and the upper tooth fixing member 1, the lower tooth fixing member 2, and the locking part 3 are all set as symmetrical structures about the vertical plane (i.e., the X plane).

[0050] Furthermore, it also includes a centering groove 5, which is set on the lower tooth fixing member 2 and extends from the lower tooth fixing groove 21 to the proximal end. The central axis of the centering groove 5 is located on a vertical plane, which facilitates the alignment of the lower tooth midline and increases the positioning accuracy of the lower tooth.

[0051] Of course, in other embodiments, the centering groove 5 can also be provided on the upper tooth fixation member 1 and extend from the upper tooth fixation groove 11 to the proximal end, and the central axis of the centering groove 5 is located on the vertical plane. In this case, the projections of the centering groove 5 located on the upper tooth fixation member 1 and the centering groove 5 located on the lower tooth fixation member 2 in the vertical direction coincide, which facilitates the alignment of the upper tooth midline and the lower tooth midline.

[0052] See Figures 1 to 3The maximum extension length can be measured by marking the teeth at their initial position (e.g., when the upper and lower teeth are perfectly aligned) and at their distal position (the position of the upper and lower teeth at maximum extension length), and then measuring with a ruler. The difference between the two positions is the corresponding maximum extension length. Alternatively, a measuring structure can be directly installed on the upper tooth fixation piece 1 and the lower tooth fixation piece 2 for measurement.

[0053] Specifically, in this embodiment, the mandibular protrusion measuring device further includes a measuring unit 9, which is disposed between the upper tooth fixation member 1 and the lower tooth fixation member 2 to measure the relative sliding distance between the two. Specifically, the measuring unit 9 includes a scale line 91 and an indicator line 92. The scale line 91 is disposed on the side wall of the upper tooth fixation member 1, and the indicator line 92 is disposed on the side wall of the lower tooth fixation member 2.

[0054] Of course, in other embodiments, the scale line 91 may be disposed on the side wall of the lower tooth fixation member 2, and the indicator line 92 may be disposed on the side wall of the upper tooth fixation member 1.

[0055] Specifically, the upper tooth fixing groove 11 is formed by the recess of the end face of the upper tooth fixing member 1, and the lower tooth fixing groove 21 is formed by the recess of the end face of the lower tooth fixing member 2.

[0056] Furthermore, the locking part 3 includes a threaded hole 31 and a locking screw 32, the threaded hole 31 being along the direction from the upper threaded fastener 1 to the lower threaded fastener 2 (i.e., Figure 1 and Figure 2 As shown in the Y direction, the locking screw 32 is installed in the threaded hole 31. When the locking screw 32 rotates and moves its end near the lower tooth fixing member 2 along the Y direction until it abuts against the lower tooth fixing member 2, the lower tooth fixing member 2 can be relatively locked relative to the upper tooth fixing member 1. When the locking screw 32 rotates and moves its end near the lower tooth fixing member 2 in the opposite direction along the Y direction until it disengages from the lower tooth fixing member 2, the lower tooth fixing member 2 can slide relative to the upper tooth fixing member 1. It should be understood that at this time, along the Y direction, there is an abutment surface perpendicular to the Y direction between the upper tooth fixing member 1 and the lower tooth fixing member 2 (such as the abutment surface formed between the limiting protrusion 7 and the limiting groove 8 in this embodiment). The locking screw 32 essentially pushes the abutment surface between the upper tooth fixing member 1 and the lower tooth fixing member 2 to abut more tightly.

[0057] See Figures 3 to 5 The mandibular protrusion measuring device also includes a connector 6, which is located at the distal end of the upper tooth fixation member 1 and is used to engage with the occlusal member 100; the central axis of the connector 6 is located in a vertical plane.

[0058] It is easy to understand that by providing the insertion part 6 at the distal end of the upper tooth fixing member 1, it is possible to achieve insertion and cooperation with other structures (such as the occlusal member 100 in this embodiment) to realize positioning measurement of multiple positions (i.e., upper teeth, lower teeth and molars) and ensure positioning accuracy.

[0059] Specifically, the upper dental fixation member 1 can be detachably connected to the occlusal member 100 via the insertion part 6. Simultaneously, the central axis of the insertion part 6 is also aligned with the vertical plane (i.e., Figure 3 The alignment of the mandibular protrusion measuring device with the occlusal element 100 ensures accurate positioning of the upper teeth (i.e., upper incisors), lower teeth (i.e., lower incisors), and intraoral molars (i.e., molars). This ensures the accuracy of the mandibular advancement appliance prepared with the assistance of this measuring device, so as to be suitable for the corresponding user.

[0060] It is worth noting that because the locking part 3 can be used to lock the upper tooth fixation member 1 and the lower tooth fixation member 2, and the insertion part 6 is detachably connected to the occlusal member 100, it can both prevent the setting of the occlusal member 100 from affecting the measurement of the mandibular protrusion distance, and achieve relative locking of the upper tooth fixation member 1 and the lower tooth fixation member 2 when installing the occlusal member 100, so as to prevent the occlusal member 100 from affecting the accuracy of their positioning during installation.

[0061] Furthermore, the insertion portion 6 has a first stepped limiting surface, and the occlusal member 100 has a second stepped limiting surface, with the first stepped limiting surface abutting against the second stepped limiting surface. Specifically, the insertion portion 6 includes a first limiting plate 61 and a second limiting plate 62. In the vertical direction, the projection of the first limiting plate 61 completely covers the projection of the second limiting plate 62. The outer wall surface of the first limiting plate 61, the outer wall surface of the second limiting plate 62, and a portion of the upper tooth fixing member 1 form the first stepped limiting surface. Correspondingly, the engaging member 100 includes a first U-shaped limiting plate 101 that is wrapped around the outer periphery of the first limiting plate 61 after insertion, and a second U-shaped limiting plate 102 that is wrapped around the outer periphery of the second limiting plate 62. The inner wall surfaces of the first U-shaped limiting plate 101 and the second U-shaped limiting plate 102 form a second stepped limiting surface to ensure the stability of the connection between the insertion part 6 and the engaging member 100, avoid the displacement in the direction perpendicular to the X plane, and ensure positioning accuracy.

[0062] Because different users have different symptoms, oral and facial features, it is obviously inaccurate to measure the longest mandibular protrusion distance using the same upper dental fixation piece 1 and lower dental fixation piece 2 for all users. This can easily lead to ineffective correction of the mandibular advancement appliance. Therefore, see [link to relevant guidelines]. Figure 3 as well as Figures 6 to 9Considering different user symptoms and characteristics, and to simulate the maximum mandibular protrusion length under corresponding oral opening and closing conditions, in this embodiment, the lower tooth fixation member 2 and the upper tooth fixation member 1 are detachably connected; there are several lower tooth fixation members 2, and when different lower tooth fixation members 2 are installed on the upper tooth fixation member 1, the minimum height from the upper tooth fixation groove 11 to the lower tooth fixation groove 21 is different.

[0063] It is worth noting that the "minimum height" referred to here is the distance from the bottom of the upper tooth fixing groove 11 to the bottom of the lower tooth fixing groove 21 when the lower tooth fixing member 2 is installed on the upper tooth fixing member 1. For example, in the front view, draw a horizontal line L1 through point P1 at the bottom of the upper tooth fixing groove 11 and a horizontal line L2 through point P2 at the bottom of the upper tooth fixing groove 11. Then, the minimum height from the upper tooth fixing groove 11 to the lower tooth fixing groove 21 is H.

[0064] Furthermore, in this embodiment, different mandibular fixation members 2 have different thicknesses H2, which facilitates operators to quickly identify different mandibular fixation members 2 in order to select the appropriate mandibular fixation member 2. Of course, the corresponding mandibular fixation grooves 21 can also be provided with different groove depths H1, as long as the minimum height from the upper fixation groove 11 to the lower fixation groove 21 meets the dimensions marked on the mandibular fixation member 2.

[0065] Furthermore, the upper tooth fixing member 1 has a sliding groove 12 at one end away from the upper tooth fixing groove 11. The sliding groove 12 is open at one end away from the upper tooth fixing groove 11. The lower tooth fixing member 2 is slidably installed in the sliding groove 12 at one end away from the lower tooth fixing groove 21, and the other end protrudes out of the sliding groove 12; so as to adapt to the installation of lower tooth fixing members 2 of different thicknesses.

[0066] Furthermore, the inner wall of the slide groove 12 is provided with at least one limiting protrusion 7 extending from the proximal end to the distal end, and the limiting protrusion 7 is slidably engaged with the limiting groove 8 provided on the lower tooth fixing member 2.

[0067] See Figure 10 This utility model also provides an auxiliary preparation device for a mandibular advancement appliance, including an occlusal member 100 and a mandibular protrusion measuring device as described above; the occlusal member 100 and the mandibular protrusion measuring device are detachably connected.

[0068] The above embodiments are merely preferred embodiments of this utility model and should not be construed as limiting the scope of protection of this utility model. Any non-substantial changes and substitutions made by those skilled in the art based on this utility model shall fall within the scope of protection claimed by this utility model.

Claims

1. A mandibular protrusion measuring device, comprising a proximal end and a distal end arranged opposite to each other, characterized in that, It includes an upper tooth fixing component (1), a lower tooth fixing component (2), and a locking part (3); The upper tooth fixation member (1) and the lower tooth fixation member (2) are slidably connected to each other, and the distal ends of the upper tooth fixation member (1) and the lower tooth fixation member (2) are respectively provided with upper tooth fixation groove (11) and lower tooth fixation groove (21). The locking part (3) is installed on the upper tooth fixing member (1) and / or the lower tooth fixing member (2) and is used to realize the sliding or locking of the lower tooth fixing member (2) relative to the upper tooth fixing member (1); It also includes a push-pull part (4), which is located at the proximal end of the lower tooth fixing member (2); The push-pull part (4) has a force-applying surface (41) facing the distal end.

2. The mandibular protrusion measuring device according to claim 1, characterized in that, The push-pull part (4) also includes a thrust ramp (42) and an arc surface (43). The thrust ramp (42) faces the proximal end and is connected to the force-applying surface (41) through the arc surface (43).

3. The mandibular protrusion measuring device according to claim 1, characterized in that, A vertical plane is provided, and the center line of the projection of the upper tooth fixing groove (11) in the vertical direction is located on the vertical plane; the center line of the projection of the lower tooth fixing groove (21) in the vertical direction is located on the vertical plane.

4. The mandibular protrusion measuring device according to claim 3, characterized in that, It also includes a centering groove (5), which is disposed on the lower tooth fixing member (2) and extends from the lower tooth fixing groove (21) toward the proximal end, and the central axis of the centering groove (5) is located on the vertical plane; And / or, It also includes a centering groove (5), which is disposed on the upper tooth fixation member (1) and extends from the upper tooth fixation groove (11) toward the proximal end, and the central axis of the centering groove (5) is located on the vertical plane.

5. The mandibular protrusion measuring device according to claim 3, characterized in that, It also includes a plug part (6), which is disposed at the distal end of the upper tooth fixation member (1) and is used to engage with the occlusal member (100); The central axis of the plug-in part (6) is located on the vertical plane.

6. The mandibular protrusion measuring device according to claim 5, characterized in that, The insertion part (6) has a first stepped limiting surface, and the engagement member (100) has a second stepped limiting surface, with the first stepped limiting surface abutting against the second stepped limiting surface.

7. The mandibular protrusion measuring device according to claim 1, characterized in that, The lower tooth fixation member (2) is detachably connected to the upper tooth fixation member (1); The lower tooth fixing member (2) is provided in several ways, and when different lower tooth fixing members (2) are installed on the upper tooth fixing member (1), the minimum height from the upper tooth fixing groove (11) to the lower tooth fixing groove (21) is different.

8. A mandibular protrusion measuring device according to claim 7, characterized in that, The upper tooth fixing member (1) has a sliding groove (12) at one end away from the upper tooth fixing groove (11), and the sliding groove (12) is open at one end away from the upper tooth fixing groove (11); The lower tooth fixing member (2) is slidably installed in the sliding groove (12) at one end away from the lower tooth fixing groove (21), and the other end protrudes out of the sliding groove (12). The inner wall of the groove (12) is provided with at least one limiting protrusion (7) extending from the proximal end to the distal end, and the limiting protrusion (7) is slidably connected with the limiting groove (8) provided on the lower tooth fixing member (2).

9. A mandibular protrusion measuring device according to any one of claims 1-8, characterized in that, It also includes a measuring unit (9) disposed between the upper tooth fixation member (1) and the lower tooth fixation member (2) to measure the relative sliding distance between the two; The measuring part (9) includes a scale line (91) and an indicator line (92), one of which is disposed on the side wall of the upper tooth fixation member (1) and the other is disposed on the side wall of the lower tooth fixation member (2).

10. An auxiliary device for preparing a mandibular advancement appliance, characterized in that, Including an occlusal component, and a mandibular protrusion measuring device as described in any one of claims 1-9 above; The occlusal element is detachably connected to the mandibular protrusion measuring device.

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