Dental impression-taking tray

Abstract

Disclosed is a dental impression-taking tray comprising a frame unit and a molding unit made of different materials, wherein, after margin formation through thermoforming of a tray molding unit, final impression taking and intermaxillary relation acquisition may be performed immediately at once in a clinic during a patient's first visit. The dental impression-taking tray according to one aspect of the present invention may comprise a maxillary tray and a mandibular tray, each comprising a non-deformable frame unit arranged in a U-shape along the dental arch, and a thermoformable unit arranged and coupled to enclose an outer surface of the frame unit and capable of being thermoformed in response to temperature changes.

Description

Dental impression tray

[0001] The present invention relates to a dental impression tray, and more specifically, to a dental impression tray comprising a frame portion and a molding portion made of different materials, wherein the final impression and intermaxillary relationship can be taken immediately in the treatment room on the first day of the patient's visit after forming the margin through thermoforming of the tray molding portion.

[0002] Generally, dentures, also known as prosthetics, refer to artificial implants in the oral cavity that replace missing natural teeth and artificially restore their appearance and function.

[0003] If natural teeth are left untreated, the resulting misalignment of adjacent and opposing teeth leads to facial deformation and impairs chewing function, exacerbating discomfort in daily life. Furthermore, if the loss of natural teeth persists for a long period, the alveolar bone surrounding the missing tooth is absorbed into the body, posing a problem that makes the installation of artificial periodontal tissue difficult.

[0004] Accordingly, dentures are provided to restore masticatory function and prevent deformation of periodontal tissues; they can be classified into partial or complete dentures depending on the number of missing teeth, and into fixed or removable types depending on the fixation method. In this case, the partial denture is installed in a partial edentulous area of ​​the upper or lower jaw using residual tissues such as surrounding teeth, alveolar bone between surrounding teeth, and gums, while the complete denture can be installed to completely cover the gums in the entire edentulous area of ​​the upper or lower jaw.

[0005] Here, the denture includes an artificial gum portion that wraps around and fixes the gums of the target teeth and an artificial tooth portion that replaces missing teeth, and can be manufactured individually to correspond to the different tooth arrangement, shape, and occlusal height for each subject.

[0006] According to the prior art, dentures are fabricated as follows.

[0007] On the first day of the visit, a preliminary impression is taken using a prefabricated tray in the examination room to make a diagnostic model, and based on this information, the laboratory makes a diagnostic model and uses the diagnostic model to make a custom tray.

[0008] On the second day of the visit, the final impression is taken in the clinic after the margins of the custom tray are formed using dental impression compound, etc. Then, in the dental laboratory, the final model is fabricated and the baseplate and occlusal rim are made.

[0009] On the third day of the visit, the patient's vertical dimension is determined by considering various factors, such as methods to check facial shape when fitting the occlusal rim in the clinic, the use of the physiological rest position, and the Willis method using average facial values. Next, the occlusal rim prepared to match the determined vertical dimension is fitted into the patient's oral cavity, and occlusal recording material is placed on the rim. Then, the mandible is guided to centric position using bimanual manipulation or Gothic arch tracing to obtain the horizontal intermaxillary relationship. Once the vertical and horizontal intermaxillary relationships have been obtained, marking lines serving as criteria for selecting and arranging artificial teeth are inscribed on the rim. Based on this, the dental laboratory fabricates a wax denture by attaching the final model to the articulator via face arch transfer, arranging the artificial teeth, and forming the gingiva.

[0010] On the fourth day of the visit, the wax dentures fabricated in the clinic are fitted into the patient's oral cavity to check facial features, soft tissue movement, the aesthetics of the anterior artificial teeth, the occlusal status, the shape of the gingiva, and functional aspects such as pronunciation. During this process, the vertical relationship and centric relation are examined to ensure they are accurately achieved, and the patient is checked using a mirror to verify the aesthetics of the anterior artificial teeth and any discomfort with the dentures. Once verification is complete, the dentures are fabricated in the dental laboratory through wax investment and resin polymerization.

[0011] Finally, on the fifth day of the visit, dentures are fitted into the patient's mouth, and intraoral denture adjustments are performed if necessary.

[0012] According to this prior art, the most important process for fabricating custom dentures that are not uncomfortable for the patient is the impression taking process, including margin formation, and the process of recording the intermaxillary relationship.

[0013] Impression taking is performed in the dental clinic to create a mold of the patient's gums for diagnosis and treatment, followed by the creation of a model in the dental laboratory to fabricate the final dentures.

[0014] Conventionally, impressions are typically taken twice in the fabrication of dentures. That is, two impressions are taken: a preliminary impression and a final impression.

[0015] At this stage, the preliminary impression is taken in the clinic; a prefabricated tray is prepared, impression material is mixed into it, and the preliminary impression is taken. Subsequently, the dental laboratory fabricates a diagnostic model and produces a custom tray based on this.

[0016] Next, in the treatment room, the process proceeds in the order of preparing a custom tray, shaping the margins using dental impression compound, applying the final impression material, and taking the final impression. Subsequently, in the dental laboratory, the final model, baseplate, and occlusal rim are fabricated.

[0017] Intermaxillary relationship recording is performed to reproduce the patient's appropriate maxillary and mandibular relationship on an articulator using the final model fabricated after impression taking, utilizing occlusal rims and occlusal recording materials prepared in the dental laboratory. After determining the vertical dimension using the method described above, the dentist places the occlusal rim prepared accordingly into the patient's oral cavity and positions the occlusal recording materials; subsequently, the mandible is guided to centric relation to record the horizontal intermaxillary relationship. Once the vertical and horizontal intermaxillary relationships are recorded, marking lines are inscribed on the occlusal rim to serve as criteria for selecting and arranging artificial teeth.

[0018] Therefore, there is a problem in that the patient must visit at least 5 times in total for the fabrication of conventional dentures, including 2 visits for impression taking, 1 visit for intermaxillary relationship taking, 1 visit for wax denture try-in, and 1 visit for final denture fitting.

[0019] The present invention aims to solve the above-mentioned problems. The objective of the present invention is to provide a dental impression tray that eliminates all the processes required for conventional impression taking, such as preliminary impression taking, diagnostic model fabrication, and custom tray fabrication, and simplifies the cumbersome marginal formation using dental impression compounds by forming the marginal through thermoforming of the tray molding part, while simultaneously performing the final impression taking and intermaxillary relationship taking immediately in the clinic on the first day of the patient's visit, thereby reducing the number of patient visits required for conventional denture fabrication from 5 to 3, or 2.

[0020] The problems of the present invention are not limited to those mentioned above, and other unmentioned problems will be clearly understood by a person skilled in the art to which the present invention pertains from the description below.

[0021] According to one aspect of the present invention, a tray for taking dental impressions is provided, comprising an upper tray and a lower tray, the upper tray and the lower tray, the upper tray and the lower tray, respectively, the upper tray and the lower tray, the upper tray and the lower tray, respectively, of a non-deforming frame portion arranged in a U-shape along the dental arch and a thermoforming portion arranged and coupled to surround the outer surface of the frame portion and capable of thermoforming according to temperature changes.

[0022] At this time, the thermoformed part may be made of polycaprolactone.

[0023] At this time, the above frame portion may be made of polystyrene (GPPS: General Purpose Polystyrene).

[0024] At this time, the upper and lower trays can be manufactured by double injection or insert injection.

[0025] At this time, the thermoforming portion of the maxillary tray may have a margin forming portion on its outer side that is bent upward to form a margin.

[0026] At this time, the thermoformed portion of the maxillary tray may have an extended hard palate portion in which the material of the thermoformed portion is filled into the part located on the hard palate after the maxillary tray is inserted into the oral cavity.

[0027] At this time, the frame portion of the maxillary tray may be provided with a residual alveolar ridge portion made of the same material as the thermoformed portion on its upper surface.

[0028] At this time, the frame portion of the upper jaw tray may be provided with a handle positioned to protrude outside the oral cavity when the upper jaw tray is placed inside the oral cavity.

[0029] At this time, the handle may be provided with a cut section so that it can be removed from the frame by breaking the handle after obtaining the occlusal impression.

[0030] At this time, the handle may be provided with a fastening groove for inserting and fastening an ADD POP BOW (pop stick and pop plate) to indicate a midline or occlusal plane.

[0031] At this time, the frame portion of the maxillary tray may be provided with an occlusal portion formed to protrude a certain length.

[0032] At this time, the above-mentioned occlusal part may be provided with a groove-shaped occlusal registration part on the side.

[0033] At this time, the thermoforming portion of the mandibular tray may have a margin forming portion on its outer side that is bent downward to protrude for margin formation.

[0034] At this time, the frame portion of the mandibular tray may be provided with a residual alveolar ridge portion made of the same material as the thermoformed portion on its lower surface.

[0035] At this time, the frame portion of the mandibular tray may be provided with an occlusal portion formed to protrude a certain length.

[0036] At this time, the above-mentioned occlusal portion may be provided with an occlusal acquisition portion formed in the shape of a groove.

[0037] At this time, the above-mentioned occlusal portion may be provided with a vertical height fixing portion formed to protrude from the above-mentioned occlusal portion.

[0038] At this time, the above-mentioned vertical height fixing part is provided in multiple numbers, and the front vertical height fixing part may be formed to be higher in height than the rear vertical height fixing part.

[0039] At this time, the above-mentioned occlusal portion may be partially cut so that it can be grasped and handled with a finger, and may be provided with a handle portion having positive and negative angles formed to increase friction.

[0040] According to the above configuration, a dental impression tray according to one aspect of the present invention can reduce the number of patient visits by providing a tray that allows for the final impression taking and the taking of intermaxillary relationships to be performed immediately in the treatment room on the first day of the patient's visit after margin formation.

[0041] A dental impression tray according to one aspect of the present invention eliminates the preliminary impression, diagnostic model fabrication, and custom tray fabrication processes from the conventional denture fabrication process. It simplifies the cumbersome marginal formation using dental impression compounds by forming the margin through thermoforming of the tray molding part, and simultaneously performs the final impression and intermaxillary relationship recording immediately in the clinic on the first day of the patient's visit, thereby reducing the total number of patient visits required for denture fabrication from five to three, or two visits. Therefore, it is expected that the overall treatment cost can be reduced.

[0042] A dental impression tray according to one aspect of the present invention provides a functional tray design that eliminates the need for individual tray fabrication.

[0043] A dental impression tray according to one aspect of the present invention allows for easy and rapid marginal formation through the application of a highly biocompatible PCL material and hot water thermoforming.

[0044] A dental impression tray according to one aspect of the present invention can be reshaped when necessary and can be conveniently processed and polished.

[0045] According to one aspect of the present invention, a dental impression tray can be developed that is applicable to various clinical cases, such as partial dentures and patients with deciduous jaws.

[0046] The effects of the present invention are not limited to the effects described above, and should be understood to include all effects that can be inferred from the configuration of the invention described in the detailed description or claims of the present invention.

[0047] FIG. 1 is a front view of a dental impression tray according to one embodiment of the present invention.

[0048] FIG. 2 is a side view of a dental impression tray according to one embodiment of the present invention.

[0049] FIG. 3 is a perspective view of an upper jaw tray of a dental impression tray according to one embodiment of the present invention.

[0050] FIG. 4 is a plan view of the maxillary tray of a dental impression tray according to one embodiment of the present invention.

[0051] FIG. 5 is a bottom view of the maxillary tray of a dental impression tray according to one embodiment of the present invention.

[0052] FIG. 6 is a front view of a maxillary tray of a dental impression tray according to one embodiment of the present invention.

[0053] FIG. 7 is a rear view of the maxillary tray of a dental impression tray according to one embodiment of the present invention.

[0054] FIG. 8 is a side view of a maxillary tray of a dental impression tray according to one embodiment of the present invention.

[0055] FIG. 9 is a dental impression tray according to one embodiment of the present invention.

[0056] This is a perspective view of a mandibular tray of a dental impression tray according to one embodiment of the present invention.

[0057] FIG. 10 is a plan view of a mandibular tray of a dental impression tray according to one embodiment of the present invention.

[0058] FIG. 11 is a bottom view of a mandibular tray of a dental impression tray according to one embodiment of the present invention.

[0059] FIG. 12 is a front view of a mandibular tray of a dental impression tray according to one embodiment of the present invention.

[0060] FIG. 13 is a rear view of a mandibular tray of a dental impression tray according to one embodiment of the present invention.

[0061] FIG. 14 is a side view of a mandibular tray of a dental impression tray according to one embodiment of the present invention.

[0062] Hereinafter, embodiments of the present invention are described in detail with reference to the attached drawings so that those skilled in the art can easily implement the present invention. The present invention may be embodied in various different forms and is not limited to the embodiments described herein. To clearly explain the present invention, parts unrelated to the description in the drawings have been omitted, and the same reference numerals have been used throughout the specification for identical or similar components.

[0063] The words and terms used in this specification and claims are not limited to their ordinary or dictionary meanings, but should be interpreted in a meaning and concept consistent with the technical spirit of the invention in accordance with the principles by which the inventor defines terms and concepts to best describe his invention.

[0064] Therefore, the embodiments described in this specification and the configurations illustrated in the drawings correspond to preferred embodiments of the present invention and do not represent all technical ideas of the present invention; thus, various equivalents and modifications that may replace such configurations may exist at the time of filing the present invention.

[0065] In this specification, terms such as “comprising” or “having” are intended to describe the existence of the features, numbers, steps, actions, components, parts, or combinations thereof described in the specification, and should not be understood as precluding the existence or addition of one or more other features, numbers, steps, actions, components, parts, or combinations thereof.

[0066] The statement that a component is "in front," "rear," "upper," or "lower" of another component includes, unless there are special circumstances, not only being positioned "in front," "rear," "upper," or "lower" in direct contact with the other component, but also cases where another component is positioned in between. Furthermore, the statement that a component is "connected" to another component includes, unless there are special circumstances, not only being directly connected to each other, but also being indirectly connected to each other.

[0067] Hereinafter, a dental impression tray (10) according to an embodiment of the present invention is described with reference to the drawings.

[0068] A dental impression tray (10) according to one embodiment of the present invention may include an upper jaw tray (100) and a lower jaw tray (200).

[0069] Here, the upper tray (100) and the lower tray (200) may include a frame portion (110, 210) and a thermoforming portion (120, 220).

[0070] The above-mentioned frame portion (110, 210) is a non-deforming part arranged in a U-shape along the teeth. At this time, the frame portion (110, 210) is a part manufactured to form a skeleton of a part where individual differences are not significant.

[0071] The above thermoforming part (120, 220) is arranged and combined to wrap around the outer surface of the above frame part (110, 210) and is a part capable of thermoforming according to temperature changes. At this time, the thermoforming part (120, 220) is a part manufactured to form a uniform shape over the entire area with individual differences.

[0072] At this time, in the thermoformed portion (120, 220), the retromolar tuberosity portion, maxillary tuberosity portion, palatal portion, and posterior border closure portion in the mandible are portions that vary from person to person, so it is desirable to form them slightly thicker than other portions.

[0073] Since the upper jaw tray (100) and lower jaw tray (200) according to the present invention are each equipped with a thermoforming section (120, 220), a simple margin formation operation through thermoforming is possible. Therefore, in the present invention, the cumbersome margin formation, preliminary impression taking, diagnostic model fabrication, and individual tray fabrication processes using conventional dental impression compounds are all omitted, and the upper jaw tray (100) and lower jaw tray (200) are applied on the first day of the patient's visit, and after the margin is formed through thermoforming, the final impression taking is completed immediately using the final impression material.

[0074] At this time, the thermoforming part (120, 220) may be made of polycaprolactone.

[0075] Polycaprolactone is a representative commercially available biodegradable polymer compound and is harmless and non-toxic to the human body due to its excellent biocompatibility. In addition, polycaprolactone is widely used as a material for implantable medical devices and has excellent affinity with other polymers.

[0076] At this time, the thermoforming part (120, 220) softens when exposed to a temperature above a certain level, making thermoforming possible, and when returned to room temperature, its shape hardens firmly in that state.

[0077] At this time, the frame portion (110, 210) may be made of polystyrene (GPPS: General Purpose Polystyrene).

[0078] Here, the polystyrene maintains a rigid state at room temperature and below a certain temperature. That is, when the tray (10) is exposed to a temperature above a certain temperature, only the thermoforming part (120, 220) can be formed at that temperature, and the frame part (110, 210) maintains a rigid state. Of course, when it returns to room temperature, both the frame part (110, 210) and the thermoforming part (120, 220) maintain a rigid state.

[0079] At this time, the upper tray (100) and the lower tray (200) may be manufactured by double injection or insert injection. The frame portion and the thermoformed portion of the trays may be manufactured by the double injection or insert injection, and since such double injection and insert injection are widely known technologies, a detailed description is omitted.

[0080] As described above, the maxillary tray (100) is composed of a frame part (110) and a thermoforming part (120).

[0081] At this time, the thermoforming portion (120) of the upper jaw tray (100) may have a margin forming portion (121) on its outer side that is bent upward to form a margin.

[0082] At this time, the thermoformed portion (120) of the maxillary tray (100) may be provided with an extended hard palate portion (122) in which the material of the thermoformed portion (120) is filled in the portion located at the hard palate after the maxillary tray (100) is inserted into the oral cavity.

[0083] At this time, the frame portion (110) of the upper jaw tray (100) may be provided with a residual alveolar ridge portion (123) made of the same material as the thermoformed portion (120) on its upper surface.

[0084] At this time, the frame portion (110) of the upper jaw tray (100) may be provided with a handle (111) positioned to protrude outside the oral cavity while the upper jaw tray (100) is placed inside the oral cavity.

[0085] At this time, the handle (111) may be provided with a cut portion (111a) so that the handle (111) can be broken and removed from the frame portion (110) after the occlusal record is obtained. Here, the cut portion (111a) may be applied in a general way of forming a groove along the cut line or in a form where a portion is completely cut along the cut line.

[0086] At this time, the handle (111) may be provided with an ADD POP BOW (for inserting and fastening a pop stick and pop plate) for indicating a midline or occlusal plane, and a fastening groove (111b) for fastening.

[0087] The frame portion (110) of the upper jaw tray (100) may be provided with an occlusal portion (112) formed to protrude a certain length.

[0088] At this time, the above occlusal portion (112) may be provided with a groove-shaped occlusal acquisition portion (112a) on the side.

[0089] The mandibular tray (200) is likewise composed of a frame part (210) and a thermoforming part (220).

[0090] The thermoforming portion (220) of the above-mentioned lower jaw tray (200) may have a margin forming portion (221) on its outer side that is bent downward to form a margin, similar to the upper jaw tray (100).

[0091] The frame portion (210) of the above mandibular tray (200) may have a residual alveolar ridge portion (223) made of the same material as the thermoformed portion (220) on its lower surface.

[0092] The frame portion (210) of the above mandibular tray (200) may be provided with an occlusal portion (212) formed to protrude a certain length.

[0093] At this time, the above occlusal portion (212) may be provided with an occlusal acquisition portion (212a) formed in the shape of a groove.

[0094] At this time, the occlusal portion (212) may be provided with a vertical height fixing portion (212b) formed to protrude from the occlusal portion (212).

[0095] At this time, the vertical height fixing part (212b) is provided in multiple numbers, and the front vertical height fixing part (212b) may be formed to be higher in height than the rear vertical height fixing part (212b).

[0096] At this time, the above-mentioned occlusion portion (212) may be partially cut so that it can be grasped and handled with a finger, and may be provided with a handle portion (212c) having positive and negative angles formed to increase friction.

[0097] Referring to FIG. 1, a front view of a dental impression tray (10) according to one embodiment of the present invention is shown.

[0098] In the illustrated embodiment, the upper jaw tray (100) is positioned at the top and the lower jaw tray (200) is positioned at the bottom.

[0099] The maxillary tray (100) is provided with a handle (111) extending forward on the front of the frame portion (110), and an occlusal portion (112) is formed protruding downward on each side portion.

[0100] The maxillary tray (100) has a thermoforming portion (120) formed on the outside to surround the frame portion (110), and this portion can be deformed to fit the marginal shape of each individual by thermoforming.

[0101] At this time, the thermoforming part (120) may be provided with a margin forming part (121) that is bent and extended outwardly to correspond to the margin shape.

[0102] The lower jaw tray (200) is also composed of a frame portion (210) and a thermoforming portion (220), and an occlusal portion (212) is formed protrudingly on the frame portion (110) at a position corresponding to the occlusal portion (112) of the upper jaw tray (100).

[0103] At this time, a handle portion (212c) is formed on the occlusal portion (212) of the mandibular tray (200) to make it easier to handle the mandibular tray (200). The handle portions (212c) on both sides can be grasped with fingers and inserted into and removed from the oral cavity.

[0104] In one embodiment of the present invention, the dental impression tray (10) is formed such that the thermoforming portion (120, 220) of the aforementioned maxillary tray (100) and mandibular tray (200) is heated for about 1-2 minutes at 70-75°C, and the tray is then fitted to a patient and the margin is formed. Then, while the thermoforming portion (120, 220) is hardened at room temperature, the vertical dimension is determined using the occlusal portion (112, 212) and the vertical dimension fixing portion (212b), and the final impression material is applied to obtain the final impression. Afterward, the occlusal impression material is applied to the left and right occlusal impression portions (112a, 212a) to obtain the intermaxillary relationship.

[0105] At this time, in the dental impression taking tray (10) according to one embodiment of the present invention, the thermoforming part (120, 220) is a tray that can be reformed when necessary and can be conveniently processed and polished at room temperature.

[0106] Next, the general denture fabrication process, including the fabrication and fitting of wax dentures, is carried out as before.

[0107] Through this, the processes of taking preliminary impressions in the clinic, fabricating diagnostic models in the laboratory, and making custom trays can all be omitted. The procedure can be simplified by forming the margins through tray thermoforming on the first day of the patient's visit, while simultaneously taking the final impression and recording the intermaxillary relationship in a single step right there in the clinic on the first day.

[0108] Referring to FIG. 2, a side view of a dental impression tray (10) according to one embodiment of the present invention is shown.

[0109] In the illustrated embodiment, the upper jaw tray (100) and the lower jaw tray (200) are arranged vertically.

[0110] At this time, the upper tray (100) has a thermoforming portion (120) extended upward from the frame portion (110), and the lower tray (200) also has a thermoforming portion (220) extended downward from the frame portion (210).

[0111] At this time, the handle (111) can be formed by extending downward from the frame portion (110) of the maxillary tray (100) and then extending horizontally.

[0112] At this time, the handle (111) has a thin cut-out portion (111a) formed in the shape of a groove at the connection part with the frame portion (110), and a fastening groove (111b) for fastening the so-called ADD POP BOW (pop stick and pop plate) is formed. Here, after obtaining the occlusal impression, the handle (111) can be cut along the cut-out portion (111a).

[0113] At this time, occlusal portions (112, 212) are formed at corresponding positions in each frame portion (110, 210), and a plurality of vertical height fixing portions (212b) are formed in the occlusal portion (212) of the mandibular tray (200).

[0114] At this time, the vertical height fixing part (212b) may be formed such that the front vertical height fixing part is higher than the rear vertical height fixing part.

[0115] For example, the front vertical height fixing part can be formed to be 5mm and the rear vertical height fixing part to be 4mm, and a unit indicator line can be marked every 1mm.

[0116] At this time, a pair of handle portions (212c), which are diagonally cut portions, are formed on the front of the occlusal portion (212) of the mandibular tray (200), thereby allowing the handle portions (212c) to be easily grasped and handled with fingers. Here, the handle portions (212c) may have a positive and negative shape of the tooth profile applied to increase friction.

[0117] At this time, occlusal impression taking portions (112a, 212a) are formed in the shape of grooves in each of the occlusal portions (112, 212), so that a dentist can easily take an impression using an occlusal impression material when taking an intermaxillary relationship based on this.

[0118] Referring to FIG. 3, a perspective view of an upper jaw tray of a dental impression tray according to one embodiment of the present invention is shown; referring to FIG. 4, a plan view of an upper jaw tray of a dental impression tray according to one embodiment of the present invention is shown; referring to FIG. 5, a bottom view of an upper jaw tray of a dental impression tray according to one embodiment of the present invention is shown; referring to FIG. 6, a front view of an upper jaw tray of a dental impression tray according to one embodiment of the present invention is shown; referring to FIG. 7, a rear view of an upper jaw tray of a dental impression tray according to one embodiment of the present invention is shown; and referring to FIG. 8, a side view of an upper jaw tray of a dental impression tray according to one embodiment of the present invention is shown.

[0119] In the illustrated embodiment, the upper tray (100) is formed roundly to cover the upper gums and has a hard palate portion (122) formed so that the thermoformed portion (120) is filled throughout.

[0120] At this time, the frame portion (110) of the maxillary tray (100) may be formed in a nearly flat U-shape or V-shape, and an occlusal portion (112) is provided on the side in a downward direction.

[0121] At this time, the frame portion (110) of the maxillary tray (100) is provided with a handle (111) extending forward, and the handle (111) has a perforation line (111a) and a fastening groove (111b) for attaching an ADD POP BOW (pop stick and pop plate). Here, after the occlusal record is obtained, the handle (111) can be cut and separated using the perforation line (111a).

[0122] At this time, a pair of occlusal portions (112) are provided in the lower direction on the frame portion (110) of the maxillary tray (100), and the occlusal portions (112) are provided with a groove-shaped occlusal impression taking portion (112a).

[0123] At this time, the posterior border closure (124) and border formation (121) of the thermoforming portion (120) of the maxillary tray (100) are made thicker than other parts. This allows the thermoforming to be performed accurately.

[0124] At this time, the upper jaw tray (100) is designed to have a grooved shape so as to wrap around the gum when inserted into the oral cavity and placed against the upper gum.

[0125] Here, the shape according to the position of the maxillary tray (100) is explained by referring to the general anatomical structure of the maxilla.

[0126] In FIG. 4, part A of the maxillary tray (100) represents the labial frenulum. It is located in the transition area between the lip and the alveolar ridge mucosa within the maxillary oral vestibule. Since it is a movable tissue, it is formed to be indented like a groove so that it can be sufficiently avoided.

[0127] Part B represents the labial roof. As part of the oral vestibule and the periphery of the denture, an impression must be taken with a functional form and thickness through margin formation.

[0128] Part C represents the narrow frenulum. It is located in the premolar region and connects to the buccal mucosa. Since it is a mobile tissue, it must be sufficiently avoided.

[0129] Part D represents the buccal vestibule. As part of the oral vestibule and the periphery of the denture, an impression must be taken with a functional form and thickness through margin formation.

[0130] Section E represents the maxillary tuberosity. It is the alveolar process region located at the posterior end of the remaining alveolar ridge, an area that must be completely covered by dentures.

[0131] Part F represents the hard palate. It is located in the anterior part of the palate. It is rigid and immobile, and is the site that bears the occlusal pressure of dentures.

[0132] Additionally, the posterior margin closure (124) represents a vibration line, which is a line or range that is not an anatomical structure but is a virtual line or range where the palatal area begins to vibrate when making an 'ah' sound. It is located approximately 2 mm anterior to the palate and is the posterior margin of the maxillary denture. If a negative sphere is formed on the vibration line, a positive ridge is formed on the denture that fits the sphere, thereby increasing the retention force of the denture due to the posterior margin closure of the denture.

[0133] In addition, the residual alveolar ridge is the alveolar ridge remaining after being filled with new bone following tooth loss, and it serves as the primary pressure support when dentures are fitted.

[0134] Referring to FIG. 9, a perspective view of a mandibular tray of a dental impression tray according to one embodiment of the present invention is shown. Referring to FIG. 10, a plan view of a mandibular tray of a dental impression tray according to one embodiment of the present invention is shown. Referring to FIG. 11, a bottom view of a mandibular tray of a dental impression tray according to one embodiment of the present invention is shown. Referring to FIG. 12, a front view of a mandibular tray of a dental impression tray according to one embodiment of the present invention is shown. Referring to FIG. 13, a rear view of a mandibular tray of a dental impression tray according to one embodiment of the present invention is shown. FIG. 14, a side view of a mandibular tray of a dental impression tray according to one embodiment of the present invention is shown.

[0135] In the illustrated embodiment, the mandibular tray (200) may also include a frame portion (210) and a thermoforming portion (220) provided to surround the frame portion (210).

[0136] The mandibular tray (200) is formed in a U-shape or V-shape overall with the hard palate portion open.

[0137] At this time, the frame portion (210) of the mandibular tray (200) is provided with an occlusal portion (212) protruding in an upward direction, and the occlusal portion (212) is provided with a groove-shaped occlusal acquisition portion (212a) and a protruding occlusal vertical height fixing portion (212b).

[0138] At this time, the above occlusal portion (212) is formed at a position corresponding to the occlusal portion (112) of the maxillary tray (100).

[0139] At this time, the thermoforming portion (220) of the mandibular tray (200) is provided with a margin forming portion (221) and a residual alveolar ridge portion (223) is formed.

[0140] Overall, the mandibular tray (200) is formed to cover the lower gums, and the hard palate portion is open.

[0141] Here, the shape according to the position of the mandibular tray (200) is explained by referring to a general mandibular anatomical diagram.

[0142] Referring to Figures 10 to 14, parts A through F are as described above.

[0143] Here, part G represents the lingual frenulum, a mucosal fold that does not contain muscle tissue, connecting the base of the tongue and the midline of the mandible; since it is a movable tissue, it must be sufficiently avoided.

[0144] Part H represents the sublingual fold, an elongated fold of mucous membrane covering the sublingual gland on the floor of the mouth under the tongue, which must be covered by a denture to ensure the retention of the denture.

[0145] Part I is the buccal region located on the buccal side of the mandibular molar region, where the bone tissue is dense and it is the area that bears the occlusal pressure of the denture.

[0146] The J portion is the retromolar triangular ridge, a soft tissue ridge located immediately behind the most posterior mandibular molars. Since there is little change in shape even in edentulous individuals, it is used for positioning the anterior and posterior margins of mandibular dentures and as a posterior reference for the virtual occlusal plane, and must be completely covered by the dentures.

[0147] As the dental impression tray (10) according to one embodiment of the present invention as described above is developed as a tray made of a hybrid material that can be molded in part, when actually applied, the processes of preliminary impression taking, diagnostic model making, and individual tray are all omitted, and the cumbersome marginal formation using dental impression compound is simplified by forming the marginal through thermoforming of the tray, and at the same time, the final impression taking and intermaxillary relationship taking can be performed immediately in the examination room on the first day of the patient's visit, thereby reducing the number of patient visits.

[0148] Although embodiments of the present invention have been described, the spirit of the present invention is not limited by the embodiments presented in this specification. Those skilled in the art who understand the spirit of the present invention may easily propose other embodiments within the scope of the same spirit by adding, changing, deleting, or adding components, and such are also to be considered to fall within the scope of the spirit of the present invention.

[0149] The present invention can be used when making dentures in a dental clinic.

Claims

1. A maxillary tray and a mandibular tray comprising a non-deforming frame portion arranged in a U-shape along the dentition and a thermoformable portion arranged and coupled to wrap around the outer surface of the frame portion and capable of thermoforming according to temperature changes, Dental impression tray.

2. In Paragraph 1, The above thermoforming part is made of polycaprolactone, Dental impression tray.

3. In Paragraph 1, The above frame part is made of polystyrene (GPPS: General Purpose Polystyrene), Dental impression tray.

4. In Paragraph 1, The above maxillary tray and mandibular tray are manufactured by double injection or insert injection, Dental impression tray.

5. In Paragraph 1, The thermoforming portion of the above-mentioned maxillary tray has a margin forming portion on its outer side that is bent upward to protrude for margin formation. Dental impression tray.

6. In Paragraph 1, The thermoformed portion of the maxillary tray is provided with an extended hard palate portion in which the material of the thermoformed portion is filled into the part of the maxillary tray that is positioned on the hard palate after insertion into the oral cavity. Dental impression tray.

7. In Paragraph 1, The frame portion of the above-mentioned maxillary tray has a residual alveolar ridge portion made of the same material as the thermoformed portion on its upper surface, Dental impression tray.

8. In Paragraph 1, The frame portion of the above-mentioned maxillary tray is provided with a handle positioned to protrude outside the oral cavity when the maxillary tray is placed inside the oral cavity. Dental impression tray.

9. In Paragraph 8, The above handle is provided with a cut section so that the handle can be broken and removed from the frame portion after occlusal registration. Dental impression tray.

10. In Paragraph 8, The above handle is equipped with a fastening groove for inserting and fastening a device for indicating a midline or anterior expected position, Dental impression tray.

11. In Paragraph 1, The frame portion of the above-mentioned maxillary tray is provided with an occlusal portion formed to protrude a certain length, Dental impression tray.

12. In Paragraph 11, The above occlusal portion is equipped with an occlusal registration receiving portion in the form of a groove on the side. Dental impression tray.

13. In Paragraph 1, The thermoforming portion of the above mandibular tray has a margin forming portion on its outer side that is bent downward to protrude for margin formation. Dental impression tray.

14. In Paragraph 1, The frame portion of the above mandibular tray is provided with a residual alveolar ridge portion on its lower surface made of the same material as the thermoformed portion. Dental impression tray.

15. In Paragraph 1, The frame portion of the above mandibular tray is provided with an occlusal portion formed to protrude a certain length, Dental impression tray.

16. In Paragraph 15, The above occlusal portion is equipped with an occlusal registration receiving portion formed in a groove shape, Dental impression tray.

17. In Paragraph 15, The above occlusal portion is provided with a vertical height fixing portion formed to protrude from the above occlusal portion. Dental impression tray.

18. In Paragraph 17, The above vertical height fixing part is provided in multiple numbers, and the front vertical height fixing part is formed to be higher in height than the rear vertical height fixing part, Dental impression tray.

19. In Paragraph 15, The above-mentioned occlusal portion is partially cut so that it can be grasped and handled with fingers, and is equipped with a handle portion having raised and recessed angles formed to increase friction. Dental impression tray.

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