Mouthpiece manufacturing method and occlusion acquisition method

Abstract

To shorten a time of maintaining a backward bent posture for a reduced burden on a subject.SOLUTION: A disclosed mouthpiece manufacturing method includes the steps of: taking an impression of a subject; taking an occlusion; and manufacturing a mouthpiece. In the step for taking an occlusion, a standing or seated subject bends an upper body backward, the subject maintains a posture with the upper body turned backward for the a predetermined time in a state in which teeth of upper and lower jaws are not in contact, the subject returns a backward bending of the upper body after maintaining the posture from the predetermined time, and after that, a bite material is placed in the subject's mouth to harden the bite material to take an occlusion. The backward bending of the upper body includes bending the upper body from the waist in a state in which the subject pulls both hands backward to open the chest.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present disclosure relates to a method for manufacturing a mouthpiece and a method for taking a bite. [Background technology]

[0002] Patent Document 1 discloses a method for manufacturing a mouthpiece for improving performance in sports or daily life. The method for manufacturing a mouthpiece described in Patent Document 1 includes a step of checking the covering state. In Patent Document 1, the bite (occlusion) of the subject in the covering state confirmed in the covering state checking step is obtained.

[0003] The process for confirming the covering state described in Patent Document 1 includes the steps of (1) having the subject stand or sit still on a horizontal plane, (2) having the subject stay still and relax with the upper and lower teeth not in contact, (3) having the subject tilt the head backward 30 to 60° with respect to a perpendicular axis to the horizontal plane, (4) having the subject maintain the relaxed state with the upper and lower teeth not in contact for 15 to 30 seconds while maintaining the posture of step (3) after step (4), (5) having the subject lower their gaze about 5° to 15° downward from the horizontal plane while maintaining the posture of step (3) after step (4), returning their head to the same position as in step (2), and (6) confirming the covering state (anterior coupling) of the upper and lower anterior teeth when the subject is in a resting position.

[0004] In the invention disclosed in Patent Document 1, a mouthpiece is made so that the position of the temporomandibular joint is in a relaxed position (neutral position) while being linked to the muscles and joints of the entire body, thereby improving the balance of the muscles and joints of the entire body when the mouthpiece is used, and ultimately improving performance in sports and everyday life.

[0005] Furthermore, Patent Document 1 describes the mechanism of action of the invention as follows: "In other words, the muscles, nervous system, and inter-organ networks of the entire body are thought to be linked to each other. If this is the case, when an imbalance occurs, such as when tension occurs in some muscles, joints, etc., adjustments are made to the other muscles, joints, etc. to achieve balance, while when a certain muscle or joint is in the correct position (e.g., neutral position), adjustments are made to the other muscles and joints, even if they are in the correct position (e.g., neutral position). Therefore, by using the mouthpiece according to the present invention, the temporomandibular joint is guided to the correct position (neutral position), and the temporomandibular joint and related muscle groups are calibrated, and this is fed back to the central nervous system and inter-organ networks, etc., to calibrate the entire body, which is thought to result in improved performance in sports and daily life."

[0006] Furthermore, Patent Document 1 states as an effect of the invention that "the mouthpiece according to the present invention is believed to improve performance in sports and daily life compared to conventional mouthpieces. For example, it is possible to improve agility, flexibility, and suppleness. Furthermore, by using the mouthpiece according to the present invention, the muscles and joints of the entire body can be maintained in a relaxed state, which means that, for example, during sports, the airway is secured and breathing becomes smoother, resulting in less fatigue, and in daily life, symptoms caused by imbalances in muscle tension, such as stiff shoulders and migraines, are improved." [Prior art documents] [Patent documents]

[0007] [Patent Document 1] JP 2020-6169 A Summary of the Invention

[0008] The main step in the method of Patent Document 1 is for the subject to tilt his / her head backward and maintain that position. This step is important for optimizing and improving the subject's posture and stabilizing the posture prior to taking a bite registration.

[0009] However, in the method of Patent Document 1, the subject needs to maintain a posture in which the head is tilted backward by 30 to 60 degrees with respect to an axis perpendicular to the horizontal plane for as long as 15 to 30 seconds. Maintaining a posture in which the head is tilted backward for as long as 15 to 30 seconds places a large burden on the subject, and it may be difficult to maintain the posture. If it is difficult to maintain the posture, the posture may collapse while being maintained, and the posture improvement effect may be lost. Therefore, a technology that makes it possible to shorten the time for which the backward posture is maintained in order to reduce the burden on the subject is desired.

[0010] One aspect of the present disclosure is a method for manufacturing a mouthpiece. The disclosed method includes a step of taking an impression of a subject, a step of taking a bite registration of the subject, and a step of making a mouthpiece, and the step of taking the bite registration includes a step of having a subject in a standing or sitting position lean their upper body backward, and maintaining the posture of the subject leaning their upper body backward for a predetermined time with the teeth of the upper and lower jaws not in contact, and after maintaining the predetermined time, the subject returns to the leaning position, and then inserts a bite material into the mouth of the subject to harden the bite material for the bite registration, and the leaning their upper body backward includes the subject leaning their upper body from the waist with both hands pulled backward and chest open.

[0011] Another aspect of the present disclosure is a method for taking an occlusion, comprising: a standing or sitting subject leaning his / her upper body backward from the waist with both hands on his / her buttocks or waist, the subject maintains the posture of leaning the upper body backward for a predetermined time with the teeth of the upper and lower jaws not in contact, the subject returns the leaning of the upper body after maintaining the predetermined time, and then inserts a bite material into the subject's mouth to harden the bite material for taking an occlusion, the leaning of the upper body backward includes the subject leaning the upper body backward from the waist with both hands pulled backward and chest open.

[0012] Further details will be described in the following embodiments. [Brief description of the drawings]

[0013] [Figure 1] FIG. 1 is a flow chart showing the steps of a method for producing a mouthpiece. [Diagram 2] FIG. 2 is an explanatory diagram of the state of the foot in the initial state. [Diagram 3] FIG. 3 is an explanatory diagram of upper body leaning. [Figure 4] Figure 4 shows the state when both arms are rotated outward while leaning back. [Diagram 5] FIG. 5 is an explanatory diagram of the state in which the tongue is stuck out. [Figure 6] FIG. 6 is a table showing the experimental results of the comparative example. [Figure 7] FIG. 7 is a table showing the experimental results of the example. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0014] <1. Overview of mouthpiece manufacturing method and bite registration method>

[0015] (1) The method for manufacturing a mouthpiece according to the embodiment may include a step of taking an impression of a subject, a step of taking a bite registration of the subject, and a step of making a mouthpiece. The mouthpiece here is a concept including a mouthguard. Although a mouthpiece and a mouthguard are similar, in the case of sports use, it is often called a mouthguard. In addition, the bite registration here is to obtain the positional relationship between the upper and lower jaws, and the upper and lower teeth do not need to be in contact. The bite registration may be obtained, for example, as the positional relationship between the upper and lower jaws when the upper and lower teeth are separated. The positional relationship between the upper and lower jaws may be obtained, for example, as the positional relationship between the upper and lower teeth, or as the positional relationship between the upper and lower gums, or as the upper and lower positional relationship between the upper jaw side part and the lower jaw side part in the mouth.

[0016] The step of taking the bite registration may include having the subject lean their upper body backwards while standing or sitting, maintaining the posture with the upper and lower teeth not in contact for a predetermined period of time, and after the subject has maintained the predetermined period of time, returning the upper body to its original position, and then inserting a bite material into the subject's mouth and hardening the bite material to take the bite registration.

[0017] By leaning the upper body backward, the subject's posture is adjusted prior to the bite registration, and by maintaining that posture, the adjusted posture can be stabilized. Therefore, if the subject uses a mouthpiece that has been manufactured after taking the bite registration in an adjusted posture, it can be expected to improve performance in sports or daily life.

[0018] The bending of the upper body backward preferably includes bending the upper body from the waist with the subject pulling both hands backward and opening the chest. Here, the bending of the hands backward means pulling both hands backward from the shoulders and positioning them behind both sides of the body so that the chest opens. According to the experiment and verification by the inventor, it has been confirmed that the posture adjustment is effectively performed by bending the upper body from the waist with both hands pulled backward and opening the chest. Therefore, the time for maintaining the posture of bending the upper body can be shortened.

[0019] The mechanism of action by which leaning the upper body from the waist with both hands pulled back and the chest open contributes to effective posture adjustment is thought to be as follows. That is, by pulling both hands back, the positions of the thoracic cavity and the diaphragm can be optimized. By optimizing the position of the diaphragm, the abdominal cavity, internal organs, and pelvic floor muscles are also optimized in the same way as the diaphragm, and this improves the position of the body core. Here, the body core refers to the antigravity muscles. By improving and stabilizing the position of the antigravity muscles lower than the neck, it leads to improved neck posture by the neck muscles. In addition, by leaning the upper body back from the waist, the posture-enhancing muscles on the ventral and dorsal sides of the body are adjusted, so that the posture adjustment effect is achieved over a wide area of ​​the whole body, including the legs. In addition, by pulling both hands back, the rib cage opens (the chest stretches), and there is also the effect of improving posture by stretching the narrowing of the front of the chest caused by rounded shoulders, etc.

[0020] The subject preferably leans his / her upper body backward while taking a deep breath. Taking a deep breath expands the volume of the thoracic cavity and optimizes the function of the thoracic cavity. Taking a deep breath while pulling both hands backward can optimize the position of the thoracic cavity and diaphragm more effectively.

[0021] (2) In the method according to the present embodiment, the predetermined time for maintaining the posture with the upper body bent backward may be relatively short, for example, from 7 seconds to less than 15 seconds. In the invention described in Patent Document 1, the time for maintaining the posture was 15 to 30 seconds, but in the method according to the present embodiment, the time may be shorter than that. The predetermined time is preferably from 8 seconds to less than 13 seconds, and more preferably from 9 seconds to less than 12 seconds.

[0022] (3) The state in which the teeth of the upper and lower jaws are not in contact with each other is preferably a state in which the tongue is stuck out from the teeth of the upper and lower jaws. By sticking the tongue out from the teeth, the state in which the teeth of the upper and lower jaws are not in contact with each other can be reliably obtained. Moreover, since the position of the tongue affects the mandibular floor muscles such as the tongue base position and also affects breathing, sticking out the tongue also has the effect of stretching the mandibular floor muscles such as the tongue base position and improving the position of the mandibular floor muscles. It is sufficient to stick out the tongue at the latest before the upper body starts to bend backward. For example, the tongue may be stuck out after the upper body is bent backward or before the upper body is bent backward.

[0023] (4) The act of bending the upper body backward may include bending the upper body backward with both hands on the buttocks or the lower back. By placing both hands on the buttocks or the lower back, the posture when bending the upper body becomes stable and it becomes easier to bend the body more widely. In addition, by placing both hands on the buttocks or the lower back, both hands may be inevitably pulled backward.

[0024] (5) The pulling back of both hands may include externally rotating both hands. External rotation means rotating the humerus of the hand (arm) outward at the shoulder joint. By externally rotating both hands, the rib cage can be opened further. Externally rotating both hands is preferably performed with the palms facing up. By externally rotating both hands with the palms facing up, the rib cage can be opened further.

[0025] (6) The above-mentioned tilting the upper body backward may include tilting the head backward. By tilting the head backward, the neck extensor muscles and neck flexor muscles are acted upon, and posture can be adjusted more effectively. The tilting of the head backward is preferably tilting the head backward so that the line of sight is directed upward or further backward than upward. Here, upward means upward in the vertical direction, but generally upward is sufficient.

[0026] The eyes have a strong motor and neural connection with the suboccipital muscles at the back of the head. In normal life, the gaze tends to be directed downward, which causes the eyes to be rolled downward for long periods of time. Downward eye roll leads to a low tongue position and anterior tilt of the neck. In contrast, tilting the head backward so that the gaze is directed upward or further back than upward allows the eyes to be rolled upward, which has a positive effect on the mandibular floor muscles, such as tongue position, and also has a positive effect on breathing.

[0027] Returning the upper body to its original position may include returning the head position to a position where the line of sight is directed obliquely upward from the horizontal direction. In Patent Document 1, the line of sight is lowered about 5° to 15° downward from the horizontal plane while returning the head position. However, the present inventors have found that lowering the line of sight may destabilize the antigravity muscle group and impair the posture improvement effect. Therefore, by turning the line of sight obliquely upward instead of lowering the line of sight, the antigravity muscle group can be placed in a neutral position, which is preferable. Since the antigravity muscle group is the foundation of physical function, stabilizing the core of the antigravity muscle group leads to improved physical ability. In addition, turning the line of sight obliquely upward can widen the airway and increase the oxygen exchange rate, and the synergistic effect with the stabilization of the core of the antigravity muscle group can improve physical function. Therefore, turning the line of sight obliquely upward is preferable for manufacturing mouthpieces for sports use, for example.

[0028] The obliquely upward direction from the horizontal direction is, for example, preferably 5° to 10° upward from the horizontal direction, more preferably 7° to 9° upward, and even more preferably 8°.

[0029] (7) The tilting of the upper body backward may include tilting the head backward so that the line of sight is directed upward, and the returning of the tilt of the upper body may include returning the head to a position where the line of sight is directed diagonally downward from the horizontal. By tilting the line of sight diagonally downward from the horizontal, an angle can be created in the trachea, which is effective in preventing aspiration in the elderly and the like. Therefore, tilting the line of sight diagonally downward is suitable for, for example, the manufacture of mouthpieces for the elderly, dentures, or crowns.

[0030] (8) The bite material is placed in the subject's mouth and hardened in such a manner that the subject, with the bite material placed in the mouth, holds the sheet-shaped object between the upper and lower lips, closes the mouth to such an extent that the object can be removed, and then pulls out the object. In this case, the teeth of the upper and lower jaws are not in contact when the bite material hardens, and the lips are kept in an appropriate state by avoiding an excessively open or closed state. The state of the lips also affects the tongue position, so that the appropriate state of the lips also leads to an appropriate tongue position. The sheet-shaped object is, for example, a piece of paper or a sticky note that is large enough to be held in the mouth, or any other sheet-shaped object.

[0031] (9) The method according to the embodiment may be a method for taking an occlusion of a subject. The occlusion taking method includes: a subject in a standing or sitting position leans his / her upper body backward from the waist with both hands on his / her buttocks or waist; the subject maintains the posture of leaning his / her upper body backward for a predetermined time with the teeth of the upper and lower jaws not in contact; the subject returns the leaning of the upper body after maintaining the posture for the predetermined time; and then inserts a bite material into the subject's mouth for taking an occlusion and hardens the bite material. The leaning of the upper body backward includes the subject leaning his / her upper body backward from the waist with both hands pulled backward and chest open. The occlusion taking method according to the embodiment may be used for manufacturing a mouthpiece for sports or for the elderly, and may also be used for manufacturing dentures or crowns. Since the occlusion taking is generally performed not only when manufacturing a mouthpiece, but also when manufacturing dentures or crowns, it is preferable to apply the occlusion taking according to the embodiment to manufacturing dentures or crowns.

[0032] <2. Examples of mouthpiece manufacturing methods and bite registration methods>

[0033] Hereinafter, the method according to the embodiment will be described in more detail with reference to the drawings.

[0034] 1 includes an impression taking step (step S100), a bite taking step (step S200), and a mouthpiece fabricating step (S300). The bite taking step (step S200) may be performed before the impression taking step (step S100).

[0035] The impression-taking process in step S100 may be similar to the impression-taking process described in Patent Document 1, and includes, for example, a process of acquiring information on the subject's upper or lower jaw dentition, etc. (dentition and tissues around the oral cavity), and a process of creating a model of the dentition, etc. based on the acquired information on the dentition, etc.

[0036] The process of acquiring information on the dentition, etc., and the process of creating a model of the dentition, etc. based on the acquired information on the dentition, etc. may be general processes, and details thereof are described in Patent Document 1.

[0037] The bite registration process in step S200 includes a preparation process for bite registration (steps S210 to S240) and a bite registration process (step S250) in which a bite material is inserted into the mouth of a subject who has completed the preparation process.

[0038] The preparation process includes a step of the subject taking an initial state (step S210), a step of the subject leaning back (step S220), a step of the subject maintaining the leaning back posture (step S230), and a step of returning to the leaned back posture (step S240). The posture of the subject is adjusted by the preparation process. The details of the preparation process will be described later.

[0039] The bite registration process in step S250 is a process for obtaining the bite of the subject whose posture has been adjusted in the preparation process. In the bite registration process, for example, the subject opens his / her mouth, a bite material is placed in the mouth, and then the subject waits in a relaxed state until the bite material hardens, thereby obtaining the bite.

[0040] In order to obtain an appropriate state of the lips, etc., when the bite material hardens, it is preferable that the subject with the bite material in the mouth pinches the sheet-shaped object between the upper and lower lips, closes the mouth to an extent that the object can be lightly pulled out, and hardens the bite material while keeping the eyeballs as still as possible in the state in which the object has been pulled out. By closing the mouth to an extent that the sheet-shaped object can be pulled out, an appropriate state of the lips, etc. can be obtained. The sheet-shaped object is, for example, a piece of paper cut into a size that can be put in the mouth. The sheet-shaped object may be pulled out by the surgeon who performs the method according to the embodiment on the subject, or by the subject himself.

[0041] After the bite material has hardened, the surgeon checks the bite material removed from the subject's mouth. For example, the surgeon looks through the bite material to see if there is any contact or excessive tightness between the upper and lower teeth.

[0042] The mouthpiece manufacturing process of step S300 is a process of manufacturing a mouthpiece from the upper and lower jaw dentition models acquired in the impression taking process of step S100 so as to match the occlusal state obtained in the bite registration process of step S200. This produces a mouthpiece in the occlusal state in a posture-adjusted state. A general method of manufacturing the mouthpiece may be used, and the details are described in Patent Document 1.

[0043] The mouthpiece manufacturing process in step S300 may include a physical condition testing process (body range of motion checking process). In the physical condition testing process, the subject performs flexibility tests such as bending forward and rotating, balance tests while balancing on one leg, center of gravity sway trajectory tests, center of gravity sway displacement tests, etc., with and without the hardened bite material attached, to measure the difference between when the bite material is attached and when it is not attached. The subject wears the bite material with an occlusion that is just enough to hold it together, rather than biting down. However, natural clenching or clenching of the teeth is allowed when performing high-stress exercise.

[0044] In the physical condition test step, if no significant difference is observed between when the bite material is attached and when it is not attached, it is desirable to start over from the bite registration step of step S200. The physical condition test step may be performed using a hardened bite material, or may be substituted by performing a similar test using a fabricated mouthpiece.

[0045] <3. Example of preparation process in bite registration process (bite registration method)>

[0046] As described above, the preparation process includes a process in which the subject takes an initial state (step S210), a process in which the subject leans back (step S220), a process in which the subject maintains the leaned back posture (step S230), and a process in which the subject returns to the leaned back posture (step S240). An example of the preparation process will be described below, but the preparation process is not limited to the following description.

[0047] In step S210, the subject takes a standing or sitting position as an initial state. When standing, it is preferable to stand on a horizontal plane with feet spread about shoulder width apart and in a relaxed position. Spreading the feet about shoulder width apart increases a sense of stability. At this time, it is preferable to have both feet parallel (for example, assuming the parallel stance posture of karate) or slightly inward as shown in FIG. 2 (for example, assuming the uchihachidachi stance posture of karate).

[0048] If the subject has difficulty standing, they may sit. When sitting, it is desirable to have the subject sit on a chair placed on a horizontal surface with the knees at an angle of approximately 90 degrees, with the soles of the feet completely on the seat, and with the subject sitting shallowly on the seat. As with the standing position, it is preferable for both feet to be parallel or slightly inward.

[0049] In step S220, the subject leans back from the initial position. When leaning back, it is preferable to pull both hands backward while taking a deep breath, and lean the upper body and head backward. When pulling both hands backward, it is preferable to inhale and spread both hands to the left and right to expand the chest. This opens the rib cage.

[0050] Next, as shown in Figure 3, the subject places both hands on the buttocks or waist and leans the upper body and head backward, allowing the upper body to bend back from the waist with the chest expanded. At this time, pushing the buttocks or waist forward with both hands makes it easier to lean back. At this time, it is preferable for the fingertips of both hands to point downward.

[0051] After that, spread both hands out to the left and right again, turn the palms up and externally rotate both hands as shown in Figure 4. Note that Figure 4 may be performed first, and then Figure 3 may be performed.

[0052] Also, in step S220, it is sufficient to simply place both hands on the buttocks or waist and bend the upper body and head backward as in Fig. 3, and it is also possible to omit turning both hands outward with the palms facing up as in Fig. 4. Also, in step S220, if the upper body is bent backward, it is sufficient to simply turn both hands outward with the palms facing up as in Fig. 4, and it is also possible to omit placing both hands on the buttocks or waist as in Fig. 3. However, by taking both the states in Fig. 3 and Fig. 4, it is possible to perform a more effective upper body bending.

[0053] The subject's line of sight should be directed upward as shown in Figure 5. The subject should tilt his / her upper body and head back sufficiently so that his / her line of sight is directed upward. The subject should also stick out his / her tongue from his / her mouth as shown in Figure 5.

[0054] In step S230, the posture obtained as described above (upper body and head tilted backward, eyes looking up, palms facing upward and spread out to the left and right, and tongue sticking out) is maintained for a predetermined time (e.g., 10 seconds) to stabilize the posture.

[0055] In step S240, after a predetermined time (e.g., 10 seconds) during which the posture is maintained, the subject returns the upper body and returns the head position to a position where the line of sight is looking diagonally upward (e.g., about 8° upward from the horizontal). Here, the head position is returned until the Camper plane is almost horizontal, and in that state, it is preferable that the line of sight is diagonally upward (e.g., 8° upward). In addition, both hands are returned to a natural position on the sides of the body. In this posture (a posture in which the line of sight is looking diagonally upward), step S250 is performed. That is, in this posture, the subject is asked to open his / her mouth, place the bite material on the occlusal surface of the mandibular molars, and close the mouth until the mandible is at rest. The above-mentioned sheet-like clamped object can be used to confirm the closing of the mouth when the mandible is at rest. In the closed state, the subject maintains the posture for about 30 seconds, which is the hardening time of the bite material.

[0056] <4. Experimental Example>

[0057] In the experiment, mouthpieces were manufactured by the manufacturing method according to the Example and the manufacturing method according to the Comparative Example. In the Example and the Comparative Example, the impression taking (step S100) and the mouthpiece fabrication (step S300) were common, and followed the impression taking process and the mouthpiece molding process of "Example 1" described in Patent Document 1. The bite taking (step S200) was different between the Example and the Comparative Example. In the bite taking process of the Example and the Comparative Example, the subject acted according to the instructions of the surgeon. Note that the Example and the Comparative Example are merely examples, and do not limit the present invention.

[0058] The bite registration process (step 200) according to the embodiment is as follows. (1) The subject is made to stand barefoot on a horizontal surface with his / her feet shoulder-width apart and stationary (step S210). (2) Keep your body still and relax with your upper and lower teeth not in contact (Step S210). (3) With your tongue out, pull both hands back and place them on your buttocks with your fingertips pointing downward. While inhaling, open your chest and arch your torso from the waist. Maintain this position with your eyes facing upward as far as possible or further back for 10 seconds (steps S220, S230). (4) After 10 seconds, return the tongue while closing the mouth until the upper and lower teeth are relaxed and not touching, relax both arms and return them to the sides of the body, return the upper body and head to a position where the Camper's plane is roughly parallel to the horizontal, and return the eyes to a position looking approximately 8° above the horizontal (Step S240). (5) While maintaining the posture of (4) above with your eyes facing upward by approximately 8 degrees, open your mouth and place the bite material into it, then close your mouth to the extent that you can lightly pull out the piece of paper with your upper and lower lips without your upper and lower teeth touching, and wait for the bite material to harden while maintaining this posture (step S250).

[0059] The bite registration process in the comparative example is as follows. The bite registration process in the comparative example was modeled after the "bite registration" in "2) Confirmation of the covering state process" and "3) Mouthpiece molding process" in "Example 1" of Patent Document 1. (1) Have the subject stand barefoot and motionless on a horizontal surface with their feet shoulder-width apart. (2) Keep your body still and relaxed with your upper and lower teeth not in contact. (3) The head is tilted back 45 degrees along a perpendicular axis to the horizontal plane, and the subject is asked to maintain this position for 25 seconds with the upper and lower teeth not in contact (tongue not sticking out) and relaxed. (4) After 25 seconds, have the subject return the head to a vertical position and lower the gaze approximately 10° downward from the horizontal plane. (5) While maintaining the posture of (4) above with your eyes lowered about 10° from the horizontal, open the mouth, place the bite material into it, close it, and wait for the bite material to harden.

[0060] In both the Example and Comparative Example, the mouthpieces were made using the same hardness of the mouthpiece sheet. The mouthpieces made by the method according to the Example were white, and the mouthpieces made by the method according to the Comparative Example were orange. In the experiment, in order to prevent the subjects (Subjects 1 to 3) from having any preconceived ideas, the subjects were not informed of the relationship between the difference in the bite registration method and the color of the mouthpiece, and the subjects (Subjects 1 to 3) were made to wear the mouthpieces of both colors and perform bench press, squat, and deadlift.

[0061] Fig. 6 shows the results when the mouthpiece made by the method according to the comparative example is worn, and Fig. 7 shows the results when the mouthpiece made by the method according to the embodiment is worn. As is clear from the comparison between Fig. 6 and Fig. 7, when the mouthpiece made by the method according to the embodiment is worn, performance is improved compared to when the mouthpiece made by the method according to the comparative example is worn. Therefore, it can be seen that the method according to the embodiment not only shortens the time to maintain the backward bending state (25 seconds -> 10 seconds), but also improves performance even when shortened.

[0062] In Figures 6 and 7, "Weight xxKg: Number of repetitions x" indicates that xxKg was lifted x times, "MAX yyKg" indicates the maximum weight that could be lifted (one time), and comments indicate impressions that the subjects freely wrote.

[0063] Comments on deadlift by subject 3 in the comparative example: "Number of reps was 1 more than when the mouthpiece was not worn." Comments on bench press by subject 2 in the example: "I was able to do 0.5 more reps than the orange one." The official number of reps is 10, the same as the comparative example (orange), but in the example, "0.5 more" expresses the feeling that there was enough strength left to lift the 11th reps. Comments on squats by subject 3 in the example: "170kg x 11 was the first time in my life that I was able to sit up and stand up even with 205kg." This means that 11 reps with a weight of 170kg was the first time in subject 3's life that he was able to sit up and stand up even when he achieved the maximum weight of 205kg. Similarly, the comment about the deadlift by subject 3 in the example: "MAX was +2.5 kg without the mouthpiece, reps +2 (highest ever)" means that the maximum weight was 2.5 kg more than when the mouthpiece was not worn, and the number of reps was also 2 more than when the mouthpiece was not worn, which was the highest ever for subject 3.

[0064] The present invention is not limited to the above-described embodiment and examples, and various modifications are possible.

Claims

1. taking an impression of a subject; taking a bite registration of the subject; A step of producing a mouthpiece; Equipped with The step of taking the bite registration comprises: The subject, standing or sitting, leans his / her upper body backward, The subject maintains a posture in which the upper body is bent backward for a predetermined period of time with the teeth of the upper and lower jaws not in contact with each other, After the subject maintains the posture for the predetermined period of time, the subject returns to the original position, Then, for occlusion, a bite material is placed in the subject's mouth and the bite material is allowed to harden. Prepare for this. The step of leaning the upper body backward includes the subject leaning the upper body backward from the waist with both hands pulled back and the chest open. Mouthpiece manufacturing method.

2. The predetermined time is equal to or longer than 7 seconds and shorter than 15 seconds. A method for manufacturing the mouthpiece according to claim 1.

3. The state where the upper and lower teeth are not touching is when the tongue is sticking out beyond the upper and lower teeth. A method for manufacturing the mouthpiece according to claim 1.

4. The step of leaning the upper body backward includes the step of the subject leaning the upper body backward with both hands on the buttocks or the lower back. A method for manufacturing the mouthpiece according to claim 1.

5. Pulling the hands back includes externally rotating the hands. A method for manufacturing the mouthpiece according to claim 1.

6. The tilting of the upper body backward includes tilting the head backward so that the line of sight is directed upward or further backward than upward, The step of returning the upper body to its original position includes returning the head to a position where the line of sight is directed obliquely upward from the horizontal direction. A method for manufacturing the mouthpiece according to claim 1.

7. The tilting of the upper body backward includes tilting the head backward so that the line of sight is directed upward, The step of returning the upper body to its original position includes returning the head position to a position where the line of sight is directed diagonally downward from the horizontal direction. A method for manufacturing the mouthpiece according to claim 1.

8. Putting the bite material into the mouth of the subject and hardening the bite material is performed in a state where the subject, with the bite material put into the mouth, holds the sheet-like object to be held between the upper and lower lips, closes the mouth to an extent that the object to be held can be pulled out, and then pulls out the object to be held. A method for manufacturing the mouthpiece according to claim 1.

9. A method for taking a bite record of a subject, comprising: The subject, standing or sitting, places both hands on his / her buttocks or waist and leans his / her upper body backward from the waist. The subject maintains a posture in which the upper body is bent backward for a predetermined period of time with the teeth of the upper and lower jaws not in contact with each other, After the subject maintains the posture for the predetermined period of time, the subject returns to the original position, Then, for occlusion, a bite material is placed in the subject's mouth and the bite material is allowed to harden. Prepare for this. The step of leaning the upper body backward includes the subject leaning the upper body backward from the waist with both hands pulled back and the chest open. Occlusal recording method.

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