Jaw position relationship recording auxiliary device and jaw position relationship recording method

Abstract

The present invention discloses a jaw relationship recording auxiliary device and a jaw relationship recording method. The jaw relationship recording auxiliary device comprises: a first bending portion, the first bending portion is used to abut against the upper alveolar ridge; a second bending portion, the second bending portion is used to abut against the lower alveolar ridge; a connecting portion, the connecting portion connects the first bending portion and the second bending portion; the opening direction of the first bending portion is away from the second bending portion, and the opening direction of the second bending portion is away from the first bending portion. The first bending portion and the second bending portion of the device are placed in the mouth of an edentulous patient to abut against the corresponding upper and lower alveolar ridges to form a centric relationship position. After the occlusion, the connecting portion becomes a "bridge" connecting the upper and lower jaws, and can form upper and lower jaw data images with a determined correct jaw relationship. The information reflected by these data images can effectively assist full denture restoration. During the entire use process, it is only necessary to place the device in the mouth, which is easy to operate.

Description

Technical Field

[0001] The present invention relates to the technical field of oral medical instruments, and in particular to a jaw position relationship recording auxiliary device and a jaw position relationship recording method. Background Art

[0002] In recent years, digital intraoral scanning technology has been continuously developed and has gradually become an effective auxiliary method in full denture restoration. In the process of full denture restoration, jaw relationship recording is an important part. If the jaw relationship is wrong, it will affect the stability, retention, and chewing efficiency of the full denture when exercising its function, thereby affecting the restoration effect. However, the principle of digital intraoral scanning is to stitch together multiple photos to synthesize an image. However, due to the problems of tooth loss, alveolar ridge absorption, gaps between the upper and lower jaws, and lack of occlusal connection in edentulous patients, it is a major problem to obtain the jaw relationship through intraoral scanning of buccal images and registration data. The methods currently used in clinical practice include marking on the wax ridge, scanning using the traditional method of placing the wax ridge in the mouth for occlusion, or other similar methods. However, the devices used in these methods need to be manually held during the scanning process, and the operation is complicated. Summary of the invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides a jaw relationship recording auxiliary device and a jaw relationship recording method which are easy to operate.

[0004] In a first aspect, an embodiment of the present invention provides a jaw position recording auxiliary device, the jaw position recording auxiliary device comprising:

[0005] A first bending portion, the first bending portion is used to abut against the upper alveolar ridge;

[0006] A second bending portion, the second bending portion is used to abut against the lower alveolar ridge;

[0007] A connecting portion, the connecting portion connecting the first bending portion and the second bending portion;

[0008] The opening direction of the first bending portion is far away from the second bending portion, and the opening direction of the second bending portion is far away from the first bending portion.

[0009] The jaw relationship recording auxiliary device of the embodiment of the present invention has at least the following beneficial effects:

[0010] The first bending part and the second bending part of the device are placed in the mouth of the edentulous patient and abutted against the corresponding upper and lower alveolar ridges to form a correct jaw position relationship. The connecting part becomes a "bridge" connecting the upper and lower jaws. When intraoral scanning is performed under this condition, the upper and lower jaw data images and mandibular data images formed separately by the edentulous patient can be scanned by the device to form upper and lower jaw data images with a certain correct jaw position relationship. The information reflected by these data images can effectively assist in full denture restoration. During the entire use process, it is only necessary to place the device in the mouth, which is easy to operate.

[0011] According to some embodiments of the jaw position recording auxiliary device of the present invention, the first bending portion and the second bending portion are fixedly connected by a connecting portion. When the device is placed in the mouth for occlusion, the fixed connection of the parts can provide better stability for the device as a whole, ensuring more accurate determination of the jaw position.

[0012] According to some embodiments of the jaw relationship recording auxiliary device of the present invention, the first bending portion, the second bending portion and the connecting portion are an integrated structure, which can ensure that the auxiliary device is more convenient and quick to use.

[0013] According to some embodiments of the jaw relationship recording auxiliary device of the present invention, at least one of the first bending surface of the first bending portion and the second bending surface of the second bending portion is a curved surface. When the bending surfaces of the first bending portion and the second bending portion are curved surfaces, the supporting effect between the upper and lower jaws can be better, thereby improving the comfort of the patient.

[0014] According to some embodiments of the jaw relationship recording auxiliary device of the present invention, the length of the first bend portion and the second bend portion is 10 to 25 mm. The length of 10 to 25 mm roughly corresponds to the width of the crown of an adult's anterior teeth. Designing with this length can make the edge area on the same side of the first bend portion and the second bend portion just abut against the adjacent alveolar ridge of the anterior tooth alveolar socket, improve the stability of placement, and make the placement of the auxiliary device and the determination of the jaw relationship more convenient.

[0015] According to some embodiments of the jaw relationship recording auxiliary device of the present invention, the width of the first bend portion and the second bend portion is 8 to 10 mm. The width of 8 to 10 mm roughly corresponds to the width of the alveolar ridge of an adult. Designing with this width can make the two sides of the first bend portion and the second bend portion just abut against the front and rear ends of the alveolar ridge, improve the stability of placement, and make the placement of the auxiliary device and the determination of the jaw relationship more convenient.

[0016] According to some embodiments of the jaw relationship recording auxiliary device of the present invention, the depth of the first bend and the second bend is 4 to 8 mm. The height of 4 to 8 mm roughly corresponds to the height of the alveolar ridge of an adult. The design with this height can make the edge and bottom of the first bend and the second bend just accommodate the entire alveolar ridge, so as to achieve better abutment effect and better comfort.

[0017] According to some embodiments of the jaw relationship recording auxiliary device of the present invention, the height of the connecting part is 15 to 45 mm. The height of 15 to 45 mm roughly corresponds to the distance between the upper and lower alveolar bones in most jaw relationships. Different heights are set and fine-tuned according to specific circumstances within this range to adapt to recording different jaw relationships.

[0018] According to some embodiments of the jaw relationship recording auxiliary device of the present invention, the first bending portion, the second bending portion and the connecting portion are all made of plastic. Using plastic as the main component material can ensure the strength and low cost of the auxiliary device.

[0019] In a second aspect, an embodiment of the present invention provides a jaw position recording method, the jaw position recording method comprising the following steps:

[0020] The jaw position recording auxiliary device is placed in the patient's mouth so that the jaw position recording auxiliary device abuts against the alveolar ridge;

[0021] Acquire images of dental and jaw relationship recording aids.

[0022] The jaw relationship recording method of the embodiment of the present invention has at least the following beneficial effects:

[0023] The jaw relationship recording auxiliary device can achieve highly stable contact with the patient's upper and lower jaws. After determining the correct vertical distance, the jaw relationship recording is used to participate in the acquisition of images, and a corresponding image of the jaw relationship recording auxiliary device can be formed between the upper and lower jaw images, so that the accurate jaw relationship can be determined based on these images.

[0024] According to the jaw relationship recording method of some embodiments of the present invention, after the jaw relationship recording auxiliary device is abutted against the alveolar ridge, a certain amount of impression material can be input into the gap between the first bending portion and the second bending portion and the alveolar ridge, and fixed on the alveolar ridge. Through the input of these impression materials, on the one hand, the abutting position relationship between the jaw relationship recording auxiliary device and the alveolar ridge can be made more stable and less likely to shift, which facilitates the acquisition of subsequent images, and on the other hand, it can also provide patients with a more comfortable occlusal experience.

[0025] According to the jaw relationship recording method of some embodiments of the present invention, the input method may be any method capable of placing the impression material into the gap, including but not limited to injection, lining, etc.

[0026] According to the jaw relationship recording method of some embodiments of the present invention, the impression material may include but is not limited to silicone rubber, red paste (or red and white proofing paste, mainly composed of terpene resin, stearic acid, talcum powder, lead powder, etc.), alginate, etc. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the structure of a jaw relationship recording auxiliary device according to an embodiment of the present invention.

[0028] Figure 2 It is a partial three-dimensional schematic diagram of the alveolar bone of the maxilla of an edentulous patient.

[0029] Figure 3 It is a schematic diagram of a first bending portion of a jaw relationship recording auxiliary device according to an embodiment of the present invention.

[0030] Figure 4 The figure is a side view of a jaw relationship recording auxiliary device according to an embodiment of the present invention when placed in a patient's mouth.

[0031] Figure 5 It is a schematic structural diagram of a jaw relationship recording auxiliary device according to another embodiment of the present invention. DETAILED DESCRIPTION

[0032] The following will be combined with the embodiments to clearly and completely describe the concept of the present invention and the technical effects produced, so as to fully understand the purpose, characteristics and effects of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, other embodiments obtained by those skilled in the art without creative work are all within the scope of protection of the present invention.

[0033] In the description of the embodiments of the present invention, if a feature is referred to as being "set", "fixed", "connected", or "installed" on another feature, it may be directly set, fixed, or connected to the other feature, or it may be indirectly set, fixed, connected, or installed on the other feature. In the description of the embodiments of the present invention, if "several" is involved, it means more than one, if "multiple" is involved, it means more than two, if "greater than", "less than", or "exceeds" is involved, it should be understood as not including the number itself, and if "above", "below", or "within" is involved, it should be understood as including the number itself. If "first" or "second" is involved, it should be understood as being used to distinguish technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0034] refer to Figure 1, shows the structure of a jaw relationship recording auxiliary device of an embodiment of the present invention. The jaw relationship recording auxiliary device includes a first bending portion 110, a connecting portion 120, and a second bending portion 130. The opening direction of the first bending portion 110 is upward, and the opening direction is away from the position of the second bending portion 130 relative to the first bending portion 110. The opening direction of the second bending portion 130 is downward, and the opening direction is away from the position of the first bending portion 110 relative to the second bending portion 130. The first bending portion 110 has a first bending surface 111, and the second bending portion 130 has a second bending surface 131. The first bending surface 111 and the second bending surface 131 are both arc surfaces. The first bending portion 110, the connecting portion 120 and the second bending portion 130 are an integrated structure.

[0035] refer to Figure 2 , showing a partial three-dimensional schematic diagram of the alveolar bone of the maxilla of an edentulous patient. After the tooth of an edentulous patient falls out, the alveolar socket that accommodates the tooth root appears, and then gradually grows flat. The alveolar ridge 201 is the free edge protrusion of the alveolar bone surrounding the alveolar socket. After growing flat, the alveolar ridge 201 mainly presents a smooth hill-like structure. The alveolar ridge spacing 211 of adjacent alveolar ridges 201 is approximately equal to the crown width of the tooth that has fallen out (or has not fallen out), the alveolar ridge width 212 of the alveolar ridge 201 is the front-to-back distance of the alveolar ridge 201 perpendicular to the dentition plane at this position, and the alveolar ridge height 213 of the alveolar ridge 201 is the protrusion height of the free edge protrusion.

[0036] refer to Figure 3 , shows a schematic diagram of the first bending portion of the present jaw relationship recording auxiliary device. The first bending portion 110 includes a first side portion 301 and a second side portion 302. The first side portion 301 and the second side portion 302 of the integral structure are symmetrical to each other. The bottoms of the first side portion 301 and the second side portion 302 are connected, and an opening is formed between the tops. Along the positive direction of the x-axis in the figure, the distance between the first side portion 301 and the second side portion 302 along the z-axis direction gradually increases. The length L of the first bending portion 110 refers to the length of the first side portion 301 or the second side portion 302 on the y-axis in the figure. The width W of the first bending portion 110 refers to the maximum distance between the first side portion 301 and the second side portion 302 along the z-axis direction in the figure. The depth H of the first bending portion 110 refers to the maximum height of the first bending portion 110 along the x-axis direction in the figure.

[0037] refer to Figure 4 , is a side view of the jaw relationship recording aid placed in the patient's mouth. Also refer to Figure 2 and Figure 3After the jaw position recording auxiliary device is placed in the patient's mouth, the first bent portion 110 and the alveolar ridge 201 of the maxilla are in contact with each other. In order to maintain the stability of the contact and the comfort of the patient, the length L of the first bent portion 110 is close to the alveolar ridge spacing 211 of the patient's alveolar ridge 201, so that when the jaw position recording auxiliary device forms an abutment with the patient's upper and lower jaws, the two ends of the first bent portion 110 along the y-axis direction are in contact with the adjacent alveolar ridges 201 and are in contact with each other; the width W of the first bent portion 110 is close to the alveolar ridge width 212 of the patient's alveolar ridge 201. , so that when the jaw position recording auxiliary device is in contact with the patient's upper and lower jaws, the first side portion 301 and the second side portion 302 of the first bending portion 110 can cover the front and rear ends of the alveolar ridge 201 and contact with it; the depth H of the first bending portion 110 is close to the alveolar ridge height 213 of the patient's alveolar ridge 201, so that when the jaw position recording auxiliary device is in contact with the patient's upper and lower jaws, the edges and bottom of the first side portion 301 and the second side portion 302 of the first bending portion 110 can completely cover and accommodate the entire protruding part of the alveolar ridge 201 and contact with it. The second bending portion 130 connected to the first bending portion 110 through the connecting portion 120 is the same as the first bending portion 110. In this way, the stability of the jaw position recording auxiliary device fixed between the alveolar ridges can be effectively improved, so that it is not easy to deviate from the central relationship position and shift after the vertical distance is determined, which is conducive to scanning and forming images in the mouth. At the same time, due to the setting of the arc surface, the jaw relationship recording auxiliary device can better fit the alveolar ridge when abutting, and the comfort of use is also better.

[0038] In order to achieve the above-mentioned efficient supporting effect as much as possible, the alveolar ridge spacing 211 of the alveolar ridge 201 generally ranges from 10 to 25 mm, and the length L of the first bending portion 110 is also set to within 10 to 25 mm; the alveolar ridge width 212 of the alveolar ridge 201 generally ranges from 8 to 10 mm, and the width W of the first bending portion 110 is also set to within 8 to 10 mm; the alveolar ridge height 213 of the alveolar ridge 201 generally ranges from 4 to 8 mm, and the depth H of the first bending portion 110 is also set to within 4 to 8 mm.

[0039] According to different requirements, the parameters of the first bending portion and the second bending portion may be the same or different, so as to adapt to the alveolar ridge morphology of different types of patients.

[0040] In addition, clinical data show that when the upper and lower jaws of a person form a correct jaw position, the vertical distance between the upper and lower jaws is generally between 15 and 45 mm. Therefore, the height of the connecting portion 120 is also set within 15 to 45 mm. At the same time, since the height range is relatively large, in order to better meet the vertical distance requirements of different groups of people when they are in the centric position of occlusion, the height of the connecting portion can be set to a gradient of 20 mm, 30 mm, and 40 mm.

[0041] The materials of the first bending portion 110, the connecting portion 120 and the second bending portion 130 of the jaw relationship recording auxiliary device can be selected from plastics with certain strength and toughness or other materials that are more suitable for occlusion.

[0042] The specific method of using the jaw relationship recording auxiliary device to record the jaw relationship is as follows:

[0043] (1) The jaw position recording auxiliary device is placed in the patient's mouth so that the first bent portion and the second bent portion are in contact with the alveolar ridges of the patient's upper and lower jaws respectively, so that the first bent portion abuts against the alveolar ridge of the upper jaw, and the second bent portion abuts against the alveolar ridge of the lower jaw, to guide the patient's centric position occlusion, thereby determining the vertical distance between the upper and lower jaws.

[0044] (2) Performing a digital intraoral scan to generate a three-dimensional image of the upper and lower jaws and the jaw relationship recording auxiliary device that is supported by the alveolar ridges of the upper and lower jaws, and determining the jaw relationship based on the image.

[0045] In this method, the jaw relationship recording auxiliary device is equivalent to the "bridge" connecting the upper and lower jaw models during the intraoral scanning process. The upper and lower jaw model images that were originally separated are combined in three-dimensional space by the auxiliary device to form an image of the relative relationship between the upper and lower jaws to determine the jaw relationship. At the same time, the relatively stable support of the bending part can provide necessary assistance for intraoral scanning, greatly improving the accuracy of the reconstruction results.

[0046] In step (1), for the convenience of placement, the alveolar ridge of the front teeth can be selected for support.

[0047] The above jaw relationship recording method may further include the following steps:

[0048] When the first bending part and the second bending part are in contact with the alveolar ridge, the impression material is injected or lined into the gap between the bending part and the alveolar ridge. The specific impression material can be one or more of silicone rubber, red paste, alginate, etc. The input of the impression material can make the bending part and the alveolar ridge more tightly abutted, and the fixation between the two is more stable, and it is more difficult to shift during occlusion and subsequent scanning to affect the accurate recording of the vertical distance and jaw position relationship.

[0049] In addition, during the recording process, in order to make the occlusal relationship more stable, two or more jaw relationship recording auxiliary devices can be selected to abut simultaneously.

[0050] refer to Figure 5, shows a result schematic diagram of a jaw relationship recording auxiliary device of another embodiment of the present invention, the jaw relationship recording auxiliary device comprises a first bending portion 510, a second bending portion 530 and a connecting portion 520 connecting the first bending portion 510 and the second bending portion 530, wherein the first bending surface 511 of the first bending portion 510 and the second bending surface 531 of the second bending portion 530 are formed by two planes intersecting at a certain angle, and the intersecting opening directions are opposite. When in use, the impression material can be injected into the part supporting the bending portion and the alveolar ridge to ensure that the two can be better fixed together, as a "bridge" connecting the upper and lower jaw models, so as to determine the jaw relationship.

[0051] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments. Various changes can be made within the knowledge of ordinary technicians in the technical field without departing from the purpose of the present invention. In addition, the embodiments of the present invention and the features in the embodiments can be combined with each other without conflict.

Claims

1. A jaw relationship recording method, characterized in that: The following steps are involved: The jaw position recording auxiliary device is placed in the patient's mouth so that the jaw position recording auxiliary device abuts against the alveolar ridge, and the jaw position recording auxiliary device comprises: A first bending portion, wherein the first bending portion is used to abut against the upper alveolar ridge; A second bent portion, the second bent portion being used to abut against the lower alveolar ridge; A connecting portion, the connecting portion connecting the first bending portion and the second bending portion; The opening direction of the first bending portion is away from the second bending portion, and the opening direction of the second bending portion is away from the first bending portion; Input a certain amount of impression material into the gap between the first bending portion, the second bending portion and the alveolar ridge, and fix it on the alveolar ridge; Acquire images of the teeth and jaws and the jaw relationship recording auxiliary device.

2. The jaw relationship recording method according to claim 1, characterized in that: The first bending portion and the second bending portion are fixedly connected via the connecting portion.

3. The jaw relationship recording method according to claim 1, characterized in that: The first bending portion, the second bending portion and the connecting portion are an integrated structure.

4. The jaw relationship recording method according to claim 1, characterized in that: At least one of the first bending surface of the first bending portion and the second bending surface of the second bending portion is a curved surface.

5. The jaw relationship recording method according to any one of claims 1 to 4, characterized in that: The lengths of the first bending portion and the second bending portion are 10 to 25 mm.

6. The jaw relationship recording method according to any one of claims 1 to 4, characterized in that: The width of the first bending portion and the second bending portion is 8-10 mm.

7. The jaw relationship recording method according to any one of claims 1 to 4, characterized in that: The depth of the first bending portion and the second bending portion is 4 to 8 mm.

8. The jaw relationship recording method according to any one of claims 1 to 4, characterized in that: The height of the connecting portion is 15 to 45 mm.

9. The jaw relationship recording method according to any one of claims 1 to 4, characterized in that: The first bending portion, the second bending portion and the connecting portion are all made of plastic.

10. The jaw relationship recording method according to any one of claims 1 to 4, characterized in that: The impression material includes at least one of silicone rubber, red paste and alginate.

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