Method and apparatus for providing location information of teeth

Abstract

A method and apparatus for providing tooth position information are disclosed. The present invention sets reference information including a plurality of reference planes and reference directions that are commonly applied to all teeth in a three-dimensional tooth image, measures tooth position information including the distance and angle of each individual tooth based on the set reference information, and then displays the measured tooth position information in at least one of a tooth image and a tooth position information table. Accordingly, three-dimensional tooth position information can be accurately presented.

Description

Technology Field

[0001] The present invention relates to image processing technology, and more specifically, to a technology for providing positional information of teeth within an image. Background Technology

[0002] The utilization of tooth location information can be categorized into before dental treatment, during treatment planning, and after treatment completion.

[0003] The use of pre-treatment tooth position information involves analyzing the current position of the teeth and identifying problems. The identified issues are used to determine treatment goals and the final positions of the teeth to be changed.

[0004] When establishing a treatment plan, the use of tooth position information is utilized to derive the amount of tooth displacement and reflection period for tooth movement to achieve treatment goals.

[0005] Finally, after the completion of treatment, tooth position information is utilized to verify alignment with planned treatment goals and to compare with the pre-treatment state.

[0006] In dental treatment, Inclination, Angulation, and Rotation are generally utilized as angular information for individual teeth to represent positional data, analyze the current state of the teeth, or describe their positional state after treatment. This angular information is based on the directional information distinguished morphologically and positionally by the teeth, as well as the angle between the occlusal plane—which serves as the reference for positional measurement—and the line segment of the individual tooth's Facial Axis of Clinical Crown (FACC, hereinafter referred to as 'FACC'). More specifically, it utilizes Inclination, the buccolingual angle; Angulation, the mesiodistal angle; and Rotation, the angle perpendicular to the occlusal plane. Inclination is the angle relative to the FACC and the occlusal plane according to the individual tooth's inherent direction. Rotation is the angle relative to the occlusal plane based on the position where the width of the individual tooth is minimized.

[0007] In dental treatment, the representation of tooth position information is one of the key factors for identifying pre-treatment issues and verifying post-treatment improvements. To plan and realize the direction and distance in which teeth need to move, it is necessary to represent tooth movement based on precise measurements.

[0008] The method of expressing tooth position information through the aforementioned inclination, angulation, and rotation is a method of expressing tooth position information using the angle information of each individual tooth. This individual tooth angle information has the following problems.

[0009] In the case of angulation and inclination, the definition of FACC is unclear, and the definition of the intrinsic direction of individual teeth is also unclear.

[0010] In the case of rotation, the definition of the position where tooth width is minimized is unclear; compared to inclination and angulation, the definition is insufficient, and consequently, the derivation of numerical values ​​is inaccurate.

[0011] The reason the angle information is unclear in this way is as follows.

[0012] It refers to the angle formed by the reference line and the measurement line in the cross-section of the set direction, that is, in two dimensions, and more specifically, in the three-dimensional representation where the actual tooth exists, it refers to the angle formed by the reference plane and the measurement line in the set direction to be measured.

[0013] In other words, the measurement direction, reference plane, and measurement line required to measure an angle must all be accurately defined.

[0014] However, since general angle information only outlines the concept of angle measurement, it is practically impossible to measure consistently by reflecting the same standards. Prior art literature

[65535] Korean Patent Publication 10-2020-0005844 (Published January 17, 2020) The problem to be solved

[0015] According to one embodiment, tooth position information that is utilized throughout the entire process—from identifying problems through analysis necessary for dental treatment, establishing a treatment plan to solve the identified problems, to a treatment process reflecting the established treatment plan, and comparing and verifying the progress after treatment—is clearly and objectively defined, and a method for providing tooth position information and an apparatus capable of expressing it are proposed.

[0016] To this end, we propose a method and device for providing tooth position information that can express tooth position information more accurately by improving clarity through supplementing ambiguous parts while maintaining the concept of individual tooth angles, and by adding missing parts. means of solving the problem

[0017] A method for providing tooth position information according to one embodiment includes the steps of: acquiring a three-dimensional tooth image; setting reference information including a plurality of reference planes and reference directions that are commonly applied to all teeth within the tooth image; measuring tooth position information including distances and angles of each individual tooth based on the set reference information; and displaying the measured tooth position information in at least one of the tooth image and a tooth position information table.

[0018] Multiple reference planes may include a midplane corresponding to a reference plane for measuring the horizontal position of the teeth, an occlusal plane corresponding to a reference plane for measuring the vertical position of the teeth, and an incisal plane corresponding to a reference plane for measuring the anterior-posterior position of the teeth.

[0019] Multiple reference directions may include a transverse direction that divides all teeth into left and right sides based on the midline, a sagittal direction that divides all teeth into anterior and posterior sides based on the anterior surface, and a vertical direction that divides all teeth into maxillary and mandibular sides based on the occlusal surface of individual teeth.

[0020] Tooth position information may include the distance and direction of each individual tooth relative to the midline, the distance and direction of each individual tooth relative to the anterior surface, and the distance of each individual tooth relative to the occlusal surface.

[0021] The distance of each individual tooth relative to the midline is the distance from the midline to each individual tooth, and the orientation of each individual tooth relative to the midline can be obtained based on the angle formed by the midline and a plane including a line representing the labial / buccal planes of each individual tooth and a vertical line at the point of contact with the occlusal plane.

[0022] The distance of each individual tooth to the tooth surface is the distance from the anterior surface to each individual tooth, and the orientation of each individual tooth to the anterior surface can be obtained based on the angle formed by the plane passing through the 'long axis' of each individual tooth and the 'line projected of the long axis onto the midline' with the anterior surface.

[0023] The distance of each individual tooth to the occlusal surface is the distance from the occlusal surface to each individual tooth.

[0024] The tooth position information includes the transverse angle of each individual tooth relative to the midline, and the transverse angle may be the angle between the line segment formed by projecting the major axis of the individual tooth onto the anterior surface and the vertical line at the intersection of the line segment and the occlusal plane.

[0025] The tooth position information includes the sagittal angle of each individual tooth relative to the anterior surface, and the sagittal angle may be the angle between the line segment formed by projecting the major axis of the individual tooth onto the midline and the vertical line at the point of contact of the line segment with the occlusal surface.

[0026] Reference information may further include an arch line connecting the tooth cusps in the tooth alignment state at the position where the teeth corresponding to the treatment goal should be arranged.

[0027] In the step of measuring tooth position information, the in-and-out distance and rotation angle of each individual tooth can be measured relative to the arch line, and the in-and-out distance (mm) is the distance from the arch line to each individual tooth.

[0028] In the display step, a frontal tooth image, a lateral tooth image, and an occlusal tooth image can be displayed on a single screen for the selected tooth, and the distance, occlusal plane distance, and midline angle are displayed on the frontal tooth image, the distance, occlusal plane distance, and anterior tooth angle are displayed on the lateral tooth image, and the distance and angle based on the arch line are displayed on the occlusal tooth image.

[0029] In the display step, information regarding the distance and angle relative to the midline, the distance and angle relative to the anterior surface, the distance relative to the anterior surface, and the distance and angle relative to the arch line of each individual tooth can be displayed in the tooth position information table for each tooth position.

[0030] A tooth position information providing device according to another embodiment includes a data acquisition unit for acquiring a three-dimensional tooth image, a display unit for displaying information, and a control unit that sets reference information including a plurality of reference planes and reference directions that are commonly applied to all teeth in the tooth image, measures tooth position information including the distance and angle of each individual tooth based on the set reference information, and displays the measured tooth position information through the display unit on at least one of the tooth image and the tooth position information table. Effects of the invention

[0031] The present invention can provide accurate tooth position information by improving and supplementing the information that was lacking in the conventional method of expressing tooth position information using individual tooth angles. Through the improved tooth position information of the present invention, users can understand the detailed condition of the teeth, accurately compare the pre- and post-treatment results of the same patient, and clearly compare the tooth positions of different patients using absolute and relative position concepts.

[0032] The present invention can enhance both the analytical and reproducible capabilities of tooth position through a novel representation of tooth position information. This overcomes the limitations of existing methods that express tooth position information using individual tooth angles, and has the effect of enabling the objective display of even the amount of displacement variation after tooth treatment.

[0033] The present invention unifies the reference information for measuring tooth position information into reference information representing the entire tooth structure, and by converting angle information into distance information and adding distance information, it enables a more accurate representation of tooth position information. Based on dental treatments where the effect of movement can be expected even through tooth rotation, this invention offers the potential for convenience in expressing the position based on the distance moved in certain cases.

[0034] The present invention can clearly and accurately establish a basis for analyzing the pre-treatment condition, formulating pre- or intermediate treatment plans, and comparing post-treatment results by providing accurate tooth position information.

[0035] The present invention can improve the predictability of a simulated procedure (simulation) using software with measured tooth position information by ensuring the reproducibility of tooth position information. Brief explanation of the drawing

[0036] FIG. 1 is a diagram illustrating the configuration of a tooth position information providing device according to one embodiment of the present invention. FIG. 2 is a diagram illustrating the flow of a method for providing tooth position information according to an embodiment of the present invention. FIG. 3 is a drawing illustrating a reference plane and an arch line corresponding to reference information according to an embodiment of the present invention. FIGS. 4 and 5 are drawings showing individual tooth position information in the frontal direction displayed on a tooth image according to an embodiment of the present invention, FIGS. 6 and 7 are drawings showing individual tooth position information in a lateral direction displayed on a tooth image according to an embodiment of the present invention. FIGS. 8 and 9 are drawings showing vertical distances displayed on tooth images according to an embodiment of the present invention, FIGS. 10 to 13 are drawings showing the in and out distances on a tooth image according to an embodiment of the present invention, FIGS. 14 and 15 are drawings showing a rotation angle on a tooth image according to an embodiment of the present invention, FIG. 16 is a drawing illustrating a tooth position information table according to an embodiment of the present invention. FIG. 17 is a drawing illustrating a screen displaying tooth position information for a selected tooth according to one embodiment of the present invention. Specific details for implementing the invention

[0037] The advantages and features of the present invention and the methods for achieving them will become clear by referring to the embodiments described below in detail together with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below but can be implemented in various different forms. These embodiments are provided merely to ensure that the disclosure of the present invention is complete and to fully inform those skilled in the art of the scope of the invention, and the present invention is created only by the scope of the claims. Throughout the specification, the same reference numerals refer to the same components.

[0038] In describing the embodiments of the present invention, if it is determined that a detailed description of known functions or configurations may unnecessarily obscure the essence of the invention, such detailed description will be omitted. Furthermore, the terms described below are terms created to reflect the functions in the embodiments of the present invention, and these may vary depending on the intentions or conventions of the user or operator. Therefore, their creation should be based on the content throughout this specification.

[0039] Hereinafter, embodiments of the present invention will be described in detail with reference to the attached drawings. However, the embodiments of the present invention exemplified below may be modified in various different forms, and the scope of the present invention is not limited to the embodiments described below. The embodiments of the present invention are provided to more completely explain the present invention to those skilled in the art to which this invention pertains.

[0040] FIG. 1 is a diagram illustrating the configuration of a tooth position information providing device according to one embodiment of the present invention.

[0041] Referring to FIG. 1, a tooth position information providing device (100) provides three-dimensional position information of a tooth based on a tooth image. The tooth position information providing device (100) is an electronic device capable of running image processing software. Examples of electronic devices include a PC (Personal Computer), a laptop, a tablet, a smartphone, etc. The image processing software can be used before dental treatment, when establishing a treatment plan, and after the completion of treatment.

[0042] A tooth position information providing device (100) according to one embodiment includes a data acquisition unit (101), a storage unit (102), a control unit (103), an input unit (104), and a display unit (105).

[0043] The data acquisition unit (101) acquires dental image data. The data acquisition unit (101) can acquire dental image data through a linked medical imaging device (not shown) or a separate database.

[0044] Various data, such as information necessary for performing the operation of the tooth position information providing device (100) and information generated according to the operation, are stored in the storage unit (102). In one embodiment, individual patient tooth image data is stored in the storage unit (102), and during a dental treatment simulation, tooth image data of a specific patient among all tooth image data can be provided to the control unit (103) according to a user request.

[0045] The control unit (103) controls each component through control by computer software. The control unit (103) manages screen information displayed on the screen through the display unit (105) and can perform analysis and simulation of the tooth image.

[0046] A control unit (103) according to one embodiment measures three-dimensional tooth position information for a tooth image. To do this, the control unit (103) sets reference information that is commonly applied to all teeth, and then measures the position information of individual teeth based on the set reference information.

[0047] Reference information that applies commonly to all teeth may include three reference planes, including the midplane, incisal plane, and occlusal plane, and the arch line.

[0048] The midline is a reference plane for measuring the horizontal position of teeth. It is an extension of the midline, which is commonly used in dental practice as a standard for the left-right positional information of the maxillary and mandibular incisors, into a plane connecting it to landmarks in the central skeletal region. The left-right position of the teeth facilitates the identification of information for positioning them aesthetically at the center of the face or functionally at the center of the skeleton.

[0049] The anterior surface is a reference plane for measuring the anterior-posterior position of teeth and is used in dental treatment as a standard for determining the occlusal formation of the 1-tooth-tooth relationship in the mesiodistal direction of the posterior teeth and the formation of the relationship in the buccolingual direction of the anterior teeth.

[0050] The occlusal plane is a reference plane used to measure the vertical position of teeth and is also commonly used in dental practice as a standard for occlusal information regarding the maxillary and mandibular teeth. Specifically, one can set an occlusal plane for the maxilla, the mandibular occlusal plane, or an occlusal plane that is the average of the maxillary and mandibular occlusal planes. Among these, one occlusal plane set according to user selection may be used. It facilitates the assessment of the degree of occlusion based on the vertical relationship between the maxillary and mandibular teeth.

[0051] The arch line is a line connecting the tooth cusps in the position where the teeth corresponding to the treatment goal should be aligned. It is a curved shape connecting the cusps of individual teeth on the occlusal surface.

[0052] The tooth position information measured based on reference information including the established reference plane and arch line is as follows.

[0053] Median plane reference: Horizontal (Transverse: hereinafter referred to as 'Transverse') distance (mm), Transverse angle (°)

[0054] Anterior plane reference: Sagittal distance (mm), Sagittal angle (°)

[0055] Occlusal plane reference: Vertical distance (mm)

[0056] Based on the arch line: In & Out distance (mm), Rotation angle (°)

[0057] To measure the above seven tooth position information items, the control unit (103) can set reference items. Reference items include, for example, the transverse direction of all teeth, the sagittal direction of all teeth, the vertical direction of all teeth, the arch line, the long axis of individual teeth, the cusp of individual teeth, etc.

[0058] The transverse direction is determined by the left-right position of the teeth relative to the midline. The sagittal direction is determined by the anterior-posterior position of the teeth relative to the anterior surface. The vertical direction is determined by the vertical position of the teeth (maxillary and mandibular) relative to the occlusal plane. The transverse + sagittal direction is determined by the in- and out-position of the teeth relative to the arch line.

[0059] The orientation of individual teeth relative to the midline, that is, the transverse direction, can be obtained based on the angle formed by the midline with a plane containing a line representing the labial / buccal planes of each individual tooth and a vertical line at the point of contact with the occlusal plane.

[0060] The orientation of each individual tooth relative to the anterior surface, that is, the sagittal direction, can be obtained based on the angle formed by the midplane projection of each individual tooth with the anterior surface. For example, the sagittal direction can be obtained based on the angle formed by the plane passing through the 'long axis' of each individual tooth and the 'line projected of the long axis onto the midplane' with the anterior surface.

[0061] In and Out distances represent the anterior-posterior distance of individual teeth from the arch line, which serves as the reference for tooth alignment in orthodontic treatment. It is commonly understood that teeth positioned inward (toward the tongue) from the arch line are referred to as "In," while teeth positioned outward (toward the cheek) are referred to as "Out." This refers to distance rather than angle and can be expressed using an improved method for measuring tooth position information; however, since teeth are positioned along the arch line according to their location—such as incisors and molars—two distance values ​​must ultimately be utilized. To address this issue, which hinders intuitive understanding, the system features the characteristic of measuring and displaying distance information based on the arch line.

[0062] To represent the three-dimensional positional information of the teeth, three reference planes (midline, anterior surface, and occlusal surface) are defined that have mutually perpendicular structures corresponding to each three-dimensional axis, and to represent all the upper and lower teeth on these three planes, it is necessary to check both directions of the three reference planes together.

[0063] At this time, in order to express the exact position on the plane, it is necessary to define a reference plane that considers the state of normal occlusion rather than the tooth arrangement state currently to be verified. In order to easily identify the symmetrical structure through distance measurement from the reference, the method of identifying teeth in dentistry is divided symmetrically left and right based on the midline, and the upper and lower jaws are divided symmetrically based on the occlusal plane. In addition, the structure is formed by increasing from the anterior teeth in an anterior-posterior position. Based on this, the control unit (103) uses the midline, occlusal plane, and anterior tooth plane as each three-dimensional reference plane. Furthermore, since each reference plane maintains a vertical position when the tooth arrangement state is ideal, each reference plane forms a plane with a vertical relationship and uses this as a reference for measurement.

[0064] The analysis method adopts a state in which three reference planes form a perpendicular relationship, defining the ideal arrangement as a position located midway between the occlusal and midline planes and in close contact with the anterior surface. In other words, when measuring tooth position information, the three reference planes serving as the measurement standard for the corresponding tooth condition must be measured in a state of normal tooth arrangement for analysis to enable comparison between different tooth arrangement states.

[0065] When measuring tooth position information, the reference must match in order to maintain the meaning of absolute and relative measurement values. Therefore, in order to maintain the same reference information, the control unit (103) can set the position where the entire arrangement of teeth to be measured is ideally arranged as the origin and fix it for use.

[0066] In other words, the standard for the tooth alignment position of the same patient is guaranteed by the same reference plane, and for different patients, the position value where the reference plane should be in an ideal state is aligned with the analysis standard value of each reference plane, thereby allowing it to have meaning as consistent tooth position information.

[0067] The control unit (103) can measure a total of three distance information in the Transverse, Sagittal, and Vertical directions, and one distance information in and out based on the arch line.

[0068] Conventional measurement methods utilize the angle between the occlusal plane of the arch line and the crown axis, constituting relative measurement. In other words, relative measurement alters the crown axis based on the tooth's position, thereby changing the occlusal plane accordingly. Consequently, since both the measured tooth and the occlusal plane are altered, it is highly difficult to compare the measured values ​​with other relative oral values.

[0069] Measurement Information = Teeth (Variable * Variable) * Reference (Variable)

[0070] Angle Information = Tooth (FACC * Direction) * Reference (Perpendicular to the occlusal surface)

[0071] This method allows for the identification of relative differences resulting from variables and their measurement information, but it is difficult to determine absolute differences. Furthermore, regarding tooth angles by direction, there is a problem in that one variable includes another during the measurement process, as the inherent orientation of the teeth must be additionally reflected.

[0072] A control unit (103) according to one embodiment can measure position information of individual teeth using set reference information (current state or target state). The measurement method according to one embodiment is an absolute measurement method, and the control unit (103) measures the difference from the crown axis according to the tooth position on a fixed reference plane (midline, occlusal plane, anterior surface) that serves as a reference.

[0073] Measurement Information = Teeth (Variable) * Standard (Fixed)

[0074] This measurement method measures the measurement information of variables and constants, allowing for the determination of both absolute and relative differences.

[0075] The control unit (103) measures the position information of individual teeth from the arch line and three reference planes—the midline, the anterior surface, and the occlusal surface—by dividing it into distance information and angle information for three-dimensional tooth position information measurement. The tooth position information to be measured is as follows.

[0076] Transverse distance (mm), Transverse angle (°): Based on the median plane

[0077] Sagittal distance (mm), Sagittal angle (°): Based on the anterior surface

[0078] Vertical distance (mm): Based on the occlusal plane

[0079] In and out distance (mm), Rotation angle (°): Based on the arch line (Transverse + Sagittal)

[0080] The tooth positional information measured in the conventional method was Angulation, Inclination, and Rotation. This tooth positional information represents the angle of individual teeth, and more specifically, it measures the angles of the occlusal plane and individual teeth in different directions.

[0081] Angulation: Measurement of the mesiodistal angle between the occlusal plane and the individual tooth FACC.

[0082] Inclination: Measurement of the buccolingual angle between the occlusal plane and the individual tooth FACC.

[0083] Rotation: No clear measurement information. Defined only as No rotation.

[0084] Existing measurement methods only measure angle information and lack a method for measuring rotation. The definition of the occlusal surface, which serves as the reference for measurement, is also insufficient. Consequently, due to the lack of clear standards and the existence of deviations depending on the measurement method, these methods are difficult to accept as absolute measurement items; furthermore, since they only reflect angle information, they also have limitations in relative measurement.

[0085] A control unit (103) according to one embodiment can improve the problem of measuring individual teeth in the past and can derive absolute and relative applicable measurement results through accurate standards and measurement methods.

[0086] The tooth position information measured by the control unit (103) consists of a total of 3 angle informations by direction and a total of 4 distance informations by direction.

[0087] Angle Information: Transverse Angle, Sagittal Angle, Rotation Angle

[0088] New tooth position information is defined, including transverse angle, sagittal angle, and rotation angle, which are measured using new reference information while maintaining the existing concepts of angulation, inclination, and rotation.

[0089] In addition, distance information is defined to ensure accuracy while maintaining existing Angulation, Inclination, and Rotation measurement methods.

[0090] Street Information: Transverse Street, Sagittal Street, Vertical Street, In-and-Out Street

[0091] In this way, by additionally displaying distance information along with angle information, the accuracy of position reproduction can be improved and the scope of application expanded.

[0092] As described above, the control unit (103) can improve and supplement the insufficient information in expressing the existing tooth position information to accurately measure the tooth position information in three dimensions and display the measured position information.

[0093] In order to measure three-dimensional position information for all teeth, the control unit (103) sets three-dimensional reference directions (Transverse, Sagittal, Vertical) and applies the set reference directions equally to each individual tooth when measuring tooth position information.

[0094] The control unit (103) additionally measures an angle item with a specific axis of the measured tooth and distance information with a specific point of the measured tooth from the reference information for each direction. Accordingly, the control unit (103) measures the distance information and the angle information together. Perfect display and reproduction of position information is impossible with only one type of information, such as distance information or angle information.

[0095] The control unit (103) can measure tooth position information based on reference information including the same reference plane and reference direction for all individual teeth. Accordingly, the entire set of teeth can be identified at once by fixing the display screen direction. Furthermore, it is easy to present a screen that allows the user to identify the content at once without additional user operation.

[0096] The control unit (103) can convert the measured angle information into distance information based on a specific position of each tooth and provide it according to the user's selection.

[0097] The control unit (103) can simultaneously display the position information of all individual teeth on a single screen of the software through the display unit (105). For example, the position information of teeth on both sides of three directions, that is, six directions, can be simultaneously displayed on a single screen through the display unit (105).

[0098] The control unit (103) can display tooth position information measured by reflecting the same reference information for all individual teeth in a tooth position information table through the display unit (105). The tooth position information table may include both absolute information and relative information. For example, the tooth position information of all teeth displayed in the tooth position information table includes absolute information measured from the same reference information and relative information with respect to different teeth.

[0099] The input unit (104) receives user operation signals.

[0100] The display unit (105) displays information on the screen. The display unit (105) can display the results of the operation of the control unit (103) on the screen. For example, the display unit (105) can display tooth position information measured through the control unit (103) through at least one of a tooth image and a tooth position information table.

[0101] FIG. 2 is a diagram illustrating the flow of a method for providing tooth position information according to an embodiment of the present invention.

[0102] Referring to FIG. 2, the tooth position information providing device (100) acquires a three-dimensional tooth image (S210). The three-dimensional tooth image may be a pre-treatment image and a post-treatment image of a predetermined patient, or a pre-treatment image and a post-treatment image of different patients.

[0103] Next, the tooth position information providing device (100) sets reference information including a plurality of reference planes and reference directions that are commonly applied to all teeth in the tooth image (S220). At this time, the basic information set is as follows.

[0104] Individual tooth long axis: The long axis of the tooth (crown + tooth). It is a line connecting the center of the tooth's crown and root. In this case, the center of the crown and root can be the center of gravity in volume or the center of the intermediate cross-section. During dental treatment, the individual tooth long axis is used as a reference when the tooth moves or rotates. Additionally, in the measurement of the present invention, it is used to measure the angle information of the individual tooth.

[0105] Individual tooth Cervico-occlusal direction: Refers to the gingival (Cervical) and occlusal (Occlusal) directions of an individual tooth. To ensure accuracy and consistency, the long axis of the individual tooth is used; the side closer to the occlusal plane relative to the long axis can be defined as Occlusal, and the opposite direction (Root position) as Cervical. It is characterized by finally determining the Cervico-occlusal direction as a line existing in the crown region of the long axis.

[0106] Individual tooth mesiodistal direction: Refers to the mesial and distal directions of an individual tooth. To ensure accuracy and consistency, four inflection points on the gingival line of each tooth are established, and the direction connecting the two points closest to the occlusal surface is set as the MD direction. Then, an outer box is created for the individual tooth, and the crown regions closest to the MD direction of the outer box are set as the Mesial and Distal positions, respectively; finally, the line connecting these two regions is determined as the Mesiodistal direction.

[0107] Individual tooth Buccolingual direction: Refers to the buccal and lingual directions of an individual tooth. To ensure accuracy and consistency, four inflection points on the gingival line of each tooth are established, and the direction connecting the point furthest from the occlusal surface is set as the BL direction. Then, an outer box is created for each tooth, and the crown regions closest to the BL direction of the outer box are set as the Buccal and Lingual positions, respectively; finally, the line connecting these two regions is determined as the Buccolingual direction.

[0108] Landmarks of individual teeth: Among the morphological characteristics of individual teeth, the cusps corresponding to occlusal landmarks are utilized. For example, the cusps of individual teeth are: #n1 tooth: Incisal edge, #n2 tooth: Incisal edge, #n3 tooth: Cusp, #n4 tooth: Buccal cusp, #n5 tooth: Buccal cusp, #n6 tooth: Mesiobuccal cusp, #n7 tooth: Mesiobuccal cusp.

[0109] For the accuracy of measurement, only one major landmark commonly used in dental treatment can be used among the multiple occlusal landmarks that individual teeth possess.

[0110] Individual tooth FACC: A line connecting the maximum buccal protrusions of the crown of an individual tooth. To clarify the definition of the maximum protrusion, it is characterized by using a line connecting the maximum buccal protrusion points of the cross-sections at the 1 / 3 and 2 / 3 points of the crown. During dental treatment, the FACC can be utilized as reference information when analyzing occlusal relationships and measuring Angulation and Torque. Furthermore, in the measurement of the present invention, it can be utilized to measure individual tooth position angle information (Angulation, Torque) using conventional methods.

[0111] In the reference information setting step (S220), the tooth position information providing device (100) sets the same reference information for absolute and relative comparison of multiple cases. If different standards are set for the pre-treatment state and the post-treatment state, respectively, accurate position comparison is impossible. Therefore, the tooth position information providing device (100) sets the same reference information for the pre-treatment or post-treatment (treatment target) state.

[0112] Reference information for measuring three-dimensional tooth position information includes a reference plane, which may include the midline, occlusal, and anterior surfaces. The reference plane will be described below.

[0113] Midline: A reference plane used to measure the horizontal position of teeth, it is also commonly used in dental practice as a standard for determining the central position of maxillary and mandibular teeth. The midline is a plane that connects the facial midline with the center of the skeleton. More specifically, the midline—which is commonly used as a standard for the left-right positional information of maxillary and mandibular anterior teeth (a vertical line connecting the center of the pupil and the tip of the nose)—is utilized by extending this to a plane that connects the central skeletal landmark. The left-right position of the teeth is used to determine information regarding their location—aesthetically, to the center of the face, and functionally, to the center of the skeleton. The midline facilitates the assessment of the degree of occlusion based on the horizontal relationship between the maxillary and mandibular teeth. It is also utilized as a standard for measuring horizontal angle information.

[0114] Occlusal Plane: A reference plane used to measure the vertical position of teeth, commonly used in dental practice as a standard for occlusal information regarding the maxillary and mandibular teeth. Specifically, one can set an occlusal plane for the maxillary or mandibular teeth, or an occlusal plane that is the average of the maxillary and mandibular occlusal planes. Among these, one occlusal plane set according to user selection may be used. It facilitates the assessment of the degree of occlusion based on the vertical relationship between the maxillary and mandibular teeth. It is also utilized as a standard for measuring vertical angle information.

[0115] Anterior Surface: As a reference plane for measuring the anterior-posterior position of teeth, it utilizes the Incisal Position—which is also commonly used as a standard for occlusal information of maxillary central incisors in dental practice—by generating it perpendicular to the midline and occlusal planes. More specifically, by applying Overjet analysis values ​​that measure the anterior-posterior positions of the maxillary and mandibular central incisors using a single maxillary anterior surface, it can be used to derive the position of mandibular teeth that have moved a certain distance posteriorly from the maxillary anterior surface. It facilitates the assessment of the degree of occlusion based on the anterior-posterior relationship between maxillary and mandibular teeth. Furthermore, it serves as a standard for measuring anterior-posterior angle information.

[0116] Reference information for measuring three-dimensional tooth position information may further include arch lines. The arch lines are as follows.

[0117] Arch Line: A line connecting the tooth cusps in the position where the teeth corresponding to the treatment goal should be aligned. It is characterized by deriving a curve connecting individual tooth cusp information on the occlusal plane and utilizing it as a standard.

[0118] Reference information for measuring three-dimensional tooth position information may include reference directions. The reference directions are as follows.

[0119] Transverse Direction of All Teeth: The direction is defined based on the midline. For both maxillary and mandibular teeth, the left and right teeth have an opposite relationship relative to the midline. Distance in the forward direction (existing within the same area) is distinguished as '+', and distance in the reverse direction (existing in the opposite area, crossing the midline) is distinguished as '-'. The midline may be an extension of the midline, which is commonly used in dental practice as a standard for the left-right positional information of maxillary and mandibular anterior teeth, into a plane connecting the central skeletal area landmarks.

[0120] Vertical Direction of All Teeth: The direction is defined based on the occlusal plane. Since the maxillary and mandibular teeth are symmetrical, the directions are opposite in nature. It is classified as a '+' direction when it extends beyond the occlusal plane, and a '-' direction when it does not reach the occlusal plane. The occlusal plane serves as a reference for determining the vertical position of teeth during dental treatment and is also used as the plane where the dental arch line is located.

[0121] Sagittal Direction of All Teeth: The direction is defined based on the anterior surface. The direction is the same for maxillary and mandibular teeth and is divided into anterior and posterior. If positioned lingually on the anterior surface, it has a '-' direction, and if positioned buccally, it has a '+' direction. The anterior surface is formed perpendicular to the midline and occlusal planes, based on the foremost point of the direction in which the maxillary anterior teeth are to be located.

[0122] Next, the tooth position information providing device (100) measures tooth position information including the distance and angle of each individual tooth based on reference information including a plurality of set reference planes and reference directions (S230).

[0123] In the tooth position information measurement step (S230), the tooth position information providing device (100) measures the position information of each individual tooth by reflecting the set reference information. To measure accurate position information, the tooth position information providing device (100) can measure distance information and angle information based on the same reference information of all teeth. At this time, the tooth position information to be measured is as follows.

[0124] Transverse distance (mm): This is the distance from the midline to each individual tooth, expressed as the absolute value of the X-axis relative to each coordinate value. The distance to each individual tooth may be a pre-set landmark for each tooth and / or a point included in the major axis of each individual tooth. However, if an individual tooth is outside the corresponding area, it may have a '-' value, and the classification of the area is as follows. Based on the FDI tooth number, teeth #1n and #4n (right teeth) are assigned a '+' coordinate value when they have a '+' coordinate value, and teeth #2n and #3n (left teeth) are assigned a '-' coordinate value when they have a '-' coordinate value, so that it can be understood that there is a difference in the position of the teeth from the normal direction. An example of this will be described later with reference to FIG. 4.

[0125] Transverse Angle (°): This is the angle between the line formed by projecting the major axis of an individual tooth onto the anterior surface and the vertical line at the point of contact between that line segment and the occlusal surface. Based on the FDI tooth number, for teeth #1n and #3n (maxillary right tooth and mandibular left tooth), a '+' sign is assigned for the counterclockwise angle toward the major axis line relative to the vertical line of the tangent, and a '-' sign is assigned for the clockwise angle. Measurements for teeth #2n and #4n (maxillary left tooth and mandibular right tooth) are performed according to the same criteria, and a '-' sign is assigned for the counterclockwise direction and a '+' sign for the clockwise direction. Since the '+' and '-' signs of the anterior and posterior teeth change depending on the individual tooth position, the signs allow for distinguishing the direction of inclination and understanding the left-right symmetrical structure. An example of this will be described later with reference to Fig. 5.

[0126] Sagittal distance (mm): The distance from the anterior surface to the landmark of each individual tooth. It is a distance expressed by the Z-axis value based on each coordinate value. However, if an individual tooth is outside the corresponding area, it may have a '-' value, and the classification of the area is as follows. When the Z-axis value is '-', the same '-' is assigned to allow understanding that the position of the tooth differs from the normal direction. An example of this will be described later with reference to FIG. 6.

[0127] Sagittal Angle (°): This is the angle between the line formed by projecting the major axis of an individual tooth onto the midline and the vertical line at the point of contact between that line segment and the occlusal plane. Based on the FDI tooth number, for teeth #1n and #3n (maxillary right tooth and mandibular left tooth), a '+' sign is assigned for the counterclockwise angle toward the major axis line relative to the vertical line of the tangent, and a '-' sign is assigned for the clockwise angle. Measurements for teeth #2n and #4n (maxillary left tooth and mandibular right tooth) are performed using the same criteria, and a '-' sign is assigned for the counterclockwise direction and a '+' sign for the clockwise direction. Since the '+' and '-' signs for anterior and posterior teeth change depending on the individual tooth position, the signs allow for distinguishing the direction of inclination and enabling an understanding of the left-right symmetrical structure. An example of this will be described later with reference to Fig. 7.

[0128] Vertical distance (mm): This is the distance from the occlusal plane to the landmark of each individual tooth, expressed as the absolute value of the Y-axis relative to each coordinate value. However, if an individual tooth is outside the corresponding area, it may have a '-' value, and the classification of the area is as follows. Based on the FDI tooth number, teeth #1n and #2n (maxillary teeth) are assigned a '+' coordinate value when they have a '+' coordinate value, and teeth 3n and 4n (mandibular teeth) are assigned a '-' coordinate value when they have a '-' coordinate value, so that it can be understood that the position of the tooth differs from the normal direction. An example of this will be described later with reference to FIGS. 8 and 9.

[0129] In and Out Distance (mm): This is the distance from the arch line to the landmark of each individual tooth, expressed as the absolute value of the Y-axis relative to each coordinate value. However, if an individual tooth is outside the corresponding area, it may have a '-' value, and the classification of the area is as follows. Based on the FDI tooth number, teeth #1n and #2n (maxillary teeth) are assigned a '+' coordinate value when they have a '+' coordinate value, and teeth #3n and #4n (mandibular teeth) are assigned a '-' coordinate value when they have a '-' coordinate value, so that it can be understood that the position of the tooth differs from the normal direction. An example of this will be described later with reference to FIGS. 10 and 11.

[0130] The in-and-out distance has the same meaning as the combination of the actual transverse distance and sagittal distance values, and the in-and-out distance can be provided as additional information in the occlusal plane direction that can express the transverse distance and sagittal distance together. An example of this is described later with reference to FIGS. 12 and 13.

[0131] Rotation Angle (°): This is the difference in the shortest distance between the endpoints of the mesiodistal direction line projected onto the occlusal surface and the arch line, converted into an angle. If there is no difference in distance, the angle is 0°. In other cases, the angle is calculated using trigonometric functions based on the distance difference. Based on the FDI tooth number, for teeth #1n and #3n (maxillary right and mandibular left teeth), a '+' sign is assigned for clockwise angles and a '-' sign for counterclockwise angles relative to the vertical line of the tangent. Measurements for teeth #2n and #4n (maxillary left and mandibular right teeth) are performed using the same criteria, with a '-' sign assigned for clockwise angles and a '+' sign for counterclockwise angles. Since the '+' and '-' signs for anterior and posterior teeth change depending on the individual tooth position, the signs allow for the distinction of the inclination direction and enable an understanding of the left-right symmetrical structure. An embodiment thereof is described below with reference to FIGS. 14 and FIGS. 15.

[0132] Angulation Angle (°): This is the angle formed by the mesiodistal FACC of an individual tooth with the perpendicular to the occlusal plane. While there are no specific features of existing measurement methods, the present invention is characterized by the ability to express the numerical values ​​of existing measurement methods without additional modifications.

[0133] Inclination Angle (°): This is the angle formed by the buccolingual FACC of an individual tooth with the perpendicular to the occlusal plane. While there are no specific features of existing measurement methods, the present invention is characterized by the ability to express the numerical values ​​of existing measurement methods without additional modifications.

[0134] Next, the tooth position information providing device (100) displays the measured tooth position information on at least one of a tooth image and a tooth position information table (S240). An embodiment thereof will be described later with reference to FIGS. 16 and FIGS. 17.

[0135] FIG. 3 is a drawing illustrating a reference plane and an arch line corresponding to reference information according to one embodiment of the present invention.

[0136] The reference plane includes a midline plane (310), an occlusal plane (320), and an anterior plane (330), which has been described above with reference to FIGS. 1 and FIGS. 2.

[0137] The arch line (340) is a line connecting the tooth cusps in the tooth arrangement state at the position where the teeth corresponding to the treatment goal should be arranged. It is characterized by deriving a curve connecting individual tooth cusp information on the occlusal surface and using it as a standard.

[0138] FIGS. 4 and 5 are drawings showing individual tooth position information in the frontal direction displayed on a tooth image according to an embodiment of the present invention.

[0139] More specifically, FIG. 4 is a diagram showing the transverse distance on a tooth image according to one embodiment of the present invention, and FIG. 5 is a diagram showing the transverse angle on a tooth image according to one embodiment of the present invention.

[0140] Referring to FIGS. 1, 2 and 4, the tooth position information providing device (100) displays the transverse distance (mm) of individual teeth relative to the midline (310) on the tooth image. The transverse distance (mm) is the distance from the midline to the landmark of each individual tooth, and is expressed as the distance based on the absolute value of the X-axis relative to each coordinate value. However, if an individual tooth is outside the corresponding area, it may have a '-' value, and the division of the area is as follows. Based on the FDI tooth number, teeth #1n and #4n (left teeth) have a '+' coordinate value, and teeth #2n and #3n (right teeth) have a '-' coordinate value, so that '-' is assigned to make it understandable that the position of the tooth differs from the normal direction.

[0141] Referring to FIGS. 1, 2 and 5, the tooth position information providing device (100) displays the transverse angle (°) of an individual tooth relative to the midline (310) on the tooth image. The transverse angle (°) is the angle between the line formed when the major axis of an individual tooth is projected onto the anterior surface and the vertical line at the point of contact of the corresponding line segment with the occlusal surface. Based on the FDI tooth number, for teeth #1n and #3n (upper right tooth and lower left tooth), the sign '+' is assigned for the counterclockwise angle toward the major axis line relative to the vertical line of the tangent, and the sign '-' is assigned for the clockwise angle. Measurements for teeth #2n and #4n (upper left tooth and lower right tooth) are performed according to the same standard, and the sign is assigned as '-' for the counterclockwise direction and '+' for the clockwise direction. Since the '+' and '-' signs of the anterior and posterior teeth change depending on the individual tooth position, the signs allow for distinguishing the tilted direction and enabling understanding of the left-right symmetrical structure.

[0142] FIGS. 6 and 7 are drawings showing individual tooth position information in a lateral direction displayed on a tooth image according to an embodiment of the present invention.

[0143] More specifically, FIG. 6 is a diagram showing the sagittal distance on a tooth image according to one embodiment of the present invention, and FIG. 7 is a diagram showing the sagittal angle on a tooth image according to one embodiment of the present invention.

[0144] Referring to FIGS. 1, 2 and 6, the tooth position information providing device (100) displays the sagittal distance (mm) of an individual tooth relative to the anterior surface (330) on the tooth image. The sagittal distance (mm) is the distance from the anterior surface to the landmark of each individual tooth, and is a distance indicated by the value of the Z-axis relative to each coordinate value. However, if an individual tooth is outside the corresponding area, it may have a '-' value, and the area classification is as follows. When the Z-axis value is '-', the same '-' is assigned so that it can be understood that the position of the tooth differs from the normal direction.

[0145] Referring to FIGS. 1, 2 and 7, the tooth position information providing device (100) displays the sagittal angle (°) of an individual tooth on a tooth image based on the anterior surface (330). The sagittal angle (°) is the angle between the line formed when the major axis of an individual tooth is projected onto the midline and the vertical line at the point of contact of the occlusal surface of the corresponding line segment. Based on the FDI tooth number, for teeth #1n and #3n (upper right tooth and lower left tooth), the sign '+' is assigned for the counterclockwise angle toward the major axis line relative to the vertical line of the tangent, and the sign '-' is assigned for the clockwise angle. Measurements for teeth #2n and #4n (upper left tooth and lower right tooth) are performed according to the same standard, and the sign is assigned as '-' for the counterclockwise direction and '+' for the clockwise direction. Since the '+' and '-' signs of the anterior and posterior teeth change depending on the individual tooth position, the sign can distinguish the tilted direction and allow for understanding the left-right symmetrical structure.

[0146] FIGS. 8 and 9 are drawings showing vertical distances on a tooth image according to an embodiment of the present invention.

[0147] More specifically, Fig. 8 is a diagram showing the vertical distance based on the occlusal plane in the frontal direction on the tooth image, and Fig. 9 is a diagram showing the vertical distance based on the occlusal plane in the lateral direction on the tooth image.

[0148] Referring to FIGS. 1, FIGS. 2, FIGS. 8 and FIGS. 9, the tooth position information providing device (100) displays the vertical distance (mm) of individual teeth relative to the occlusal surface (320) on the tooth image.

[0149] The vertical distance (mm) is the distance from the occlusal surface (320) to the landmark of each individual tooth, and is expressed as the absolute value of the Y-axis based on each coordinate value. However, if an individual tooth is outside the corresponding area, it may have a '-' value, and the division of the area is as follows. Based on the FDI tooth number, teeth #1n and #2n (maxillary teeth) have a '+' coordinate value, and teeth 3n and 4n (mandibular teeth) have a '-' coordinate value, so that '-' is assigned to make it understandable that the position of the tooth differs from the normal direction.

[0150] FIGS. 10 to 13 are drawings showing the in-and-out distance in a tooth image according to one embodiment of the present invention.

[0151] More specifically, FIG. 10 is a diagram showing the in-and-out distances on the maxillary tooth image in the occlusal plane direction relative to the arch line, FIG. 11 is a diagram showing the in-and-out distances on the mandibular tooth image in the occlusal plane direction relative to the arch line, FIG. 12 is a diagram showing the in-and-out distances on the maxillary tooth image in the occlusal plane direction that can express both the transverse distance and the sagittal distance, and FIG. 13 is a diagram showing the in-and-out distances on the mandibular tooth image in the occlusal plane direction that can express both the transverse distance and the sagittal distance.

[0152] The In and Out distance represents the anterior-posterior distance of individual teeth from the arch line (340), which serves as a reference for tooth alignment in dental orthodontic treatment. It is commonly understood that if a tooth is positioned inward (toward the tongue) from the arch line (340), it is called In, and if a tooth is positioned outward (toward the cheek), it is called Out. This refers to distance rather than angle, and while it can be expressed through an improved method of measuring tooth position information, since teeth are positioned according to the arch line (340) such as anterior teeth and posterior teeth, ultimately two distance values ​​must be used. Since this is a factor that reduces intuitive understanding, it has the characteristic of measuring and displaying distance information by adding it based on the arch line (340).

[0153] The in-and-out distance (mm) may have a '-' value if an individual tooth deviates from the designated area, and the classification of these areas is as follows. Based on the FDI tooth number, teeth #1n and #2n (maxillary teeth) are assigned a '+' coordinate value when positive, while teeth #3n and #4n (mandibular teeth) are assigned a '-' coordinate value when negative, allowing one to understand that the tooth's position differs from the normal direction.

[0154] As shown in FIGS. 12 and 13, the in-and-out distance has the same meaning as the combination of the actual transverse distance and sagittal distance values, and the in-and-out distance can be provided as additional information in the occlusal plane direction that can express the transverse distance and sagittal distance together.

[0155] FIGS. 14 and 15 are drawings showing a rotation angle on a tooth image according to one embodiment of the present invention.

[0156] More specifically, FIG. 14 is a drawing showing the rotation angle (°) on the maxillary tooth image in the occlusal plane direction relative to the arch line (340), and FIG. 15 is a drawing showing the rotation angle (°) on the mandibular tooth image in the occlusal plane direction relative to the arch line (340).

[0157] The rotation angle (°) is calculated by converting the difference in the shortest distance between the endpoints of the mesiodistal line projected onto the occlusal surface and the arch line into an angle. If there is no difference in distance, the angle is 0°. In other cases, the angle is calculated using trigonometric functions based on the distance difference. Based on the FDI tooth number, for teeth #1n and #3n (maxillary right and mandibular left teeth), a '+' sign is assigned for clockwise angles relative to the vertical line of the tangent, and a '-' sign is assigned for clockwise angles. Measurements for teeth #2n and #4n (maxillary left and mandibular right teeth) are performed using the same criteria, with a '-' sign assigned for clockwise angles and a '+' sign for counterclockwise angles. Since the '+' and '-' signs for anterior and posterior teeth change depending on the individual tooth position, the signs allow for the distinction of the inclination direction and enable an understanding of the left-right symmetrical structure.

[0158] FIG. 16 is a drawing illustrating a tooth position information table according to one embodiment of the present invention.

[0159] Referring to FIGS. 1 and FIGS. 16, the tooth position information providing device (100) can display tooth position information measured by reflecting the same reference information for all individual teeth in a tooth position information table (1600). The tooth position information table (1600) may include both absolute information and relative information. For example, the position information of all teeth displayed in the tooth position information table (1600) includes absolute information measured from the same reference information and relative information with respect to different teeth.

[0160] Referring to FIG. 16, the tooth position information table (1600) may include information on the transverse distance (mm), transverse angle (°), sagittal distance (mm), sagittal angle (°), vertical distance (mm), in and out distance (mm), and rotation angle (°) for each individual tooth position.

[0161] FIG. 17 is a drawing illustrating a screen displaying tooth position information for a selected tooth according to one embodiment of the present invention.

[0162] Referring to FIGS. 1, FIGS. 2 and FIGS. 17, the tooth position information providing device (100) provides a tooth position information screen (1700) that allows all individual tooth position information to be checked while minimizing user operation.

[0163] The tooth position information screen (1700) can simultaneously present tooth images of both sides in three directions, i.e., six directions, for a selected tooth, for example, tooth #11. For example, the tooth position information providing device (100) displays a frontal tooth image (1710), a lateral tooth image (1720), and an occlusal tooth image (1730) on a single screen, as shown in FIG. 17.

[0164] In the case of a frontal tooth image (1710), the transverse distance relative to the midline, the vertical distance relative to the occlusal plane, and the transverse angle relative to the midline can be displayed.

[0165] In the case of a lateral tooth image (1720), the sagittal distance relative to the anterior surface, the vertical distance relative to the occlusal surface, and the sagittal angle relative to the anterior surface can be displayed.

[0166] In the case of the occlusal surface direction tooth image (1730), the in and out distance relative to the arch line and the rotation angle relative to the arch line can be displayed.

[0167] When a specific tooth is selected on a tooth location information screen or a tooth location information table, the tooth location information providing device (100) can display the transparency of unselected teeth differently from the selected tooth so that only the location information of the selected tooth can be easily verified. At this time, the location information of the selected tooth may also present the basis for the numerical value.

[0168] The tooth location information providing device (100) can basically provide the location information of all teeth so that the user can immediately identify the location information of all teeth without requiring additional user operation through the tooth location information screen (1700). Afterwards, the tooth location information providing device (100) can provide the location information of the tooth selected by the user operation signal by highlighting it.

[0169] The present invention has been described above with reference to its embodiments. Those skilled in the art will understand that the present invention may be implemented in modified forms without departing from the essential characteristics of the invention. Therefore, the disclosed embodiments should be considered in an illustrative rather than a restrictive sense. The scope of the invention is defined by the claims, not by the foregoing description, and all variations within the scope of the claims should be interpreted as being included in the invention.

Claims

Claim 1 A method for providing tooth position information performed by a tooth position information providing device, comprising: a step of acquiring a three-dimensional tooth image; a step of setting reference information including a plurality of reference planes and reference directions that are commonly applied to all teeth within the tooth image; a step of calculating the distance and angle of each individual tooth using a plurality of reference planes as measurement standards and distinguishing the directionality of the distance and angle according to a plurality of reference directions to measure tooth position information including the distance and angle of each individual tooth; and a step of displaying the measured tooth position information in at least one of a tooth image and a tooth position information table; wherein the plurality of reference planes include a midplane corresponding to a reference plane for measuring the horizontal position of the tooth; an occlusal plane corresponding to a reference plane for measuring the vertical position of the tooth; and an incisal plane corresponding to a reference plane for measuring the anterior-posterior position of the tooth. Claim 2 delete Claim 3 A method for providing tooth position information according to claim 1, wherein a plurality of reference directions include: a transverse direction dividing all teeth into left and right sides based on the midline; a sagittal direction dividing all teeth into anterior and posterior sides based on the anterior surface; and a vertical direction dividing all teeth into maxillary and mandibular sides based on the occlusal surface of individual teeth. Claim 4 A method for providing tooth position information according to claim 1, wherein the tooth position information comprises the distance and direction of each individual tooth with respect to the midline; the distance and direction of each individual tooth with respect to the anterior surface; and the distance of each individual tooth with respect to the occlusal surface. Claim 5 A method for providing tooth position information according to claim 4, wherein the distance of each individual tooth relative to the midline is the distance from the midline to each individual tooth, and the orientation of each individual tooth relative to the midline is obtained based on the angle formed by the midline and a plane including a line representing the labial / buccal planes of each individual tooth and a vertical line at the point of contact with the occlusal plane. Claim 6 A method for providing tooth position information according to claim 4, characterized in that the distance of each individual tooth to the anterior surface is the distance from the anterior surface to each individual tooth, and the orientation of each individual tooth to the anterior surface is obtained based on the angle formed by the midplane projection of each individual tooth with the anterior surface. Claim 7 A method for providing tooth position information according to claim 4, characterized in that the distance of each individual tooth to the occlusal surface is the distance from the occlusal surface to each individual tooth. Claim 8 A method for providing tooth position information according to claim 1, wherein the tooth position information includes the transverse angle of each individual tooth with respect to the midline, and the transverse angle is the angle between the line segment formed when the major axis of the individual tooth is projected onto the anterior surface and the vertical line at the point of contact of the line segment with the occlusal surface. Claim 9 A method for providing tooth position information according to claim 1, wherein the tooth position information includes the sagittal angle of each individual tooth with respect to the anterior surface, and the sagittal angle is the angle between the line segment formed when the major axis of the individual tooth is projected onto the midline and the vertical line at the point of contact of the line segment with the occlusal surface. Claim 10 A method for providing tooth position information according to claim 1, characterized in that the reference information further includes an arch line connecting tooth cusps in a tooth arrangement state at a position where teeth corresponding to the treatment goal should be arranged. Claim 11 A method for providing tooth position information according to claim 10, wherein the step of measuring tooth position information measures the in-and-out distance and rotation angle of each individual tooth based on the dental arch line, and the in-and-out distance is the distance from the dental arch line to each individual tooth. Claim 12 A method for providing tooth position information according to claim 1, wherein the displaying step involves displaying a frontal tooth image, a lateral tooth image, and an occlusal tooth image on a single screen for a selected tooth, displaying a distance based on the midline, a distance based on the occlusal plane, and an angle based on the midline in the frontal tooth image, displaying a distance based on the anterior tooth surface, a distance based on the occlusal plane, and an angle based on the anterior tooth surface in the lateral tooth image, and displaying a distance and an angle based on the arch line in the occlusal tooth image. Claim 13 A method for providing tooth position information according to claim 1, wherein the displaying step is characterized by displaying information regarding the distance and angle based on the midline of each individual tooth, the distance and angle based on the anterior surface, and the distance and angle based on the arch line in a tooth position information table. Claim 14 A tooth position information providing device comprising: a data acquisition unit for acquiring a three-dimensional tooth image; a display unit for displaying information; and a control unit for setting reference information including a plurality of reference planes and reference directions that are commonly applied to all teeth in the tooth image, calculating the distance and angle of each individual tooth using the plurality of reference planes as measurement standards, and distinguishing the directionality of the distance and angle according to the plurality of reference directions to measure tooth position information including the distance and angle of each individual tooth, and displaying the measured tooth position information through the display unit on at least one of the tooth image and the tooth position information table; wherein the plurality of reference planes include a midplane corresponding to a reference plane for measuring the horizontal position of the tooth; an occlusal plane corresponding to a reference plane for measuring the vertical position of the tooth; and an incisal plane corresponding to a reference plane for measuring the anterior-posterior position of the tooth.

Images