Dental crown design method and device and computer equipment

Abstract

The embodiment of the invention discloses a dental crown design method and device and computer equipment. The method comprises the following steps: acquiring a standby tooth jaw model and occlusion relation data of a first user, and generating a temporary crown design model corresponding to standby teeth in the standby tooth jaw model; a reference crown model is obtained, the reference crown model is a dental crown model obtained by scanning a reference dental crown, and the reference dental crown is a dental crown which is obtained by polishing a temporary dental crown and meets a dental crown wearing condition; performing alignment processing on the reference crown model and the prepared tooth jaw model, and determining position relation data between the reference crown model and the prepared tooth jaw model; and determining dental crown design data according to the prepared tooth jaw model, the reference crown model, the position relation data and the occlusion relation data, wherein the dental crown design data is designed dental crown data or is provided for a second user to carry out formal dental crown design on the prepared tooth. According to the scheme, the adaptation degree of the formal dental crown and the patient can be improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of three-dimensional model, in particular to a crown design method and device and computer equipment. BACKGROUND

[0002] In the field of oral prosthetics, crown repair is the core means to treat tooth defects and restore tooth function and aesthetics. Its process usually relies on the cooperation of clinics and processing plants: first, the clinic collects the prepared tooth dental model and occlusion relationship data containing upper and lower tooth data after tooth preparation through an intraoral scanning device, then sends these data to the processing plant, and the processing plant designs and manufactures the formal crown based on the received prepared tooth dental model and occlusion relationship data, and finally the manufactured formal crown is returned to the clinic, and the doctor completes the tooth wearing operation for the patient.

[0003] However, the existing crown repair process still has significant technical defects, resulting in long doctor clinical polishing time, high processing plant rework rate, poor patient experience, and other problems, which are specifically manifested as follows: First, if the collected occlusion relationship deviates from the real occlusion in the patient's mouth, the designed formal crown will not have a problem when trying on the processing plant's printed dental model, but when worn in the patient's mouth, it will have occlusion high, low, adjacent air gap, or tight conditions. Second, if the neck margin of the scanning data is not accurate enough, the processing plant will design based on inaccurate data, and the formal crown will have a problem of not fitting the edge or even not being in place when worn in the patient's mouth. Third, the processing plant will perform dynamic occlusion simulation on the digital model or physical printed model after completing the crown, and perform occlusion high point cutting (or polishing), which deviates from the patient's actual dynamic occlusion, which will also affect the patient's dynamic occlusion.

[0004] If these problems occur, some can be solved by the doctor spending time to polish, while some such as formal crowns with occlusion low or adjacent air gap can only be redesigned by the processing plant, affecting the patient experience.

[0005] There is an urgent need for a method that can enable the processing plant to design and produce a formal crown that is highly adapted to the patient, to reduce the doctor's clinical polishing burden, reduce the factory's crown rework rate, and improve the patient's experience. SUMMARY

[0006] The crown design method, device and computer equipment provided by the embodiments of the present application can improve the adaptation of the formal crown to the patient, thereby reducing the doctor's clinical polishing burden, reducing the factory's crown rework rate, and improving the patient's experience.

[0007] In a first aspect, the embodiments of the present application provide a crown design method, which includes: obtaining a tooth preparation dental model of a first user and occlusion relationship data of upper and lower jaws in the tooth preparation dental model, and generating a temporary crown design model corresponding to a prepared tooth in the tooth preparation dental model; obtaining a reference crown model, the reference crown model being a crown model obtained by scanning a reference crown, the reference crown being a crown obtained by polishing a temporary crown, the temporary crown being a crown manufactured based on the temporary crown design model and meeting a wearing condition of the crown; determining position relationship data between the reference crown model and the tooth preparation dental model; determining crown design data according to the tooth preparation dental model, the reference crown model, the position relationship data, and the occlusion relationship data, the crown design data being designed crown data or data used to provide a second user to design a formal crown for the prepared tooth.

[0008] In some embodiments, the determining of the position relationship data between the reference crown model and the tooth preparation dental model comprises: obtaining a crown-wearing dental model, and performing alignment processing on the crown-wearing dental model and the tooth preparation dental model to obtain first alignment data, the crown-wearing dental model being a dental model obtained by scanning a mouth of the first user when the prepared tooth of the first user wears the reference crown; performing alignment processing on the reference crown model and the crown-wearing dental model to obtain second alignment data; determining the position relationship data according to the first alignment data and the second alignment data.

[0009] In some embodiments, the determining of the position relationship data according to the first alignment data and the second alignment data comprises: performing alignment processing on the reference crown model and the tooth preparation dental model according to the crown-wearing dental model in the first alignment data and the second alignment data to obtain a target position of the reference crown model in the tooth preparation dental model; determining the position relationship data between the reference crown model and the tooth preparation dental model according to the target position.

[0010] In some embodiments, the determining of the crown design data according to the tooth preparation dental model, the reference crown model, the position relationship data, and the occlusion relationship data comprises: aligning the reference crown model to the tooth preparation dental model based on the position relationship data to obtain a crown-wearing dental target model; calculating, in the crown-wearing dental target model, abutment data between the reference crown model and adjacent teeth of the prepared tooth and neck margin fit data between the reference crown model and the prepared tooth. obtaining a crown-wearing dental arch intermediate model, the crown-wearing dental arch intermediate model being a model obtained by scanning a mouth of the first user wearing an intermediate dental crown on a prepared tooth of the first user, the intermediate dental crown being a dental crown obtained in a process of grinding the temporary dental crown by the second user; performing a preset verification on the intermediate dental crown based on the crown-wearing dental arch intermediate model, the preset verification including one or more of an adjacent space verification, an occlusion space verification, an edge fit verification, and an occlusion simulation verification, the occlusion simulation verification including one or more of a static occlusion simulation verification and a dynamic occlusion simulation verification; if the verification results of the preset verification are all pass, determining that the intermediate dental crown meets the dental crown wearing condition, and taking the intermediate dental crown as the reference dental crown; if the verification results of the preset verification include a fail, issuing a prompt information or generating a corresponding modification scheme.

[0011] In some embodiments, the adjacent space verification is performed by the following steps: determining, based on the crown-wearing dental arch intermediate model, an adjacent tooth spacing between the intermediate dental crown and an adjacent tooth of the intermediate dental crown; if the adjacent tooth spacing is less than a preset adjacent tooth spacing threshold, generating an artificial adjacent verification prompt, the artificial adjacent verification prompt instructing the second user to perform an artificial adjacent verification on the adjacent tooth spacing; if an artificial adjacent verification pass information is received, determining a pass as the verification result of the adjacent space verification; if the adjacent tooth spacing is greater than or equal to the preset adjacent tooth spacing threshold, or an artificial adjacent verification fail information is received, determining a fail as the verification result of the adjacent space verification.

[0012] In some embodiments, the occlusion space verification is performed by the following steps: determining, based on the crown-wearing dental arch intermediate model, an opposite tooth spacing between the intermediate dental crown and an opposite tooth of the intermediate dental crown; if the opposite tooth spacing is less than a preset opposite tooth spacing threshold, obtaining a mouth texture image of the crown-wearing dental arch intermediate model, the mouth texture image including a trial paper occlusion impression; determining an occlusion area of the intermediate dental crown through the trial paper occlusion impression; if the occlusion area is greater than or equal to a preset area threshold, determining a pass as the verification result of the occlusion space verification; If the inter-occlusal tooth spacing is greater than or equal to a preset inter-occlusal tooth spacing threshold, or the occlusal area is less than the preset area threshold, a check result of the occlusal space check is determined as a check fail.

[0013] In some embodiments, the edge fit check is performed by the following steps: determining, based on the intermediate dental crown-jaw model, whether the edge of the intermediate dental crown fits the cervical margin line of the prepared tooth; If the edge fits the cervical margin line, a check result of the edge fit check is determined as a check pass. If the edge does not fit the cervical margin line, a check result of the edge fit check is determined as a check fail.

[0014] In some embodiments, the generating the temporary crown design model corresponding to the prepared tooth in the prepared tooth-jaw model comprises: obtaining a standard tooth model corresponding to a tooth position number of the prepared tooth; aligning the standard tooth model and the prepared tooth to obtain a target tooth model matching the prepared tooth; generating the temporary crown design model according to the target tooth model and the prepared tooth.

[0015] In some embodiments, the generating the temporary crown design model according to the target tooth model and the prepared tooth comprises: generating an initial crown model according to the target tooth model and the prepared tooth; performing adaptive adjustment processing on the initial crown model based on a preset temporary crown design model and the prepared tooth-jaw model to obtain the temporary crown design model.

[0016] In some embodiments, the determining the positional relationship data between the reference crown model and the prepared tooth-jaw model comprises: identifying an inner surface of the reference crown model and an outer surface of the prepared tooth in the prepared tooth-jaw model; aligning the inner surface and the outer surface to determine the positional relationship data between the reference crown model and the prepared tooth-jaw model.

[0017] In some embodiments, after the determining the dental crown design data according to the prepared tooth-jaw model, the reference crown model, the positional relationship data, and the occlusal relationship data, the method further comprises: sending the dental crown design data to a user terminal corresponding to the second user.

[0018] In a second aspect, the embodiments of the present application further provide another dental crown design method, comprising: obtaining a prepared tooth dental arch model of a first user and occlusion relationship data of upper and lower jaws in the prepared tooth dental arch model, and generating a temporary crown design model corresponding to a prepared tooth in the prepared tooth dental arch model; obtaining a reference crown model, the reference crown model being a crown model obtained by scanning a reference crown, the reference crown being a crown obtained by polishing a temporary crown to meet a wearing condition of the crown, the temporary crown being a crown manufactured based on the temporary crown design model; if the shape and edge of the reference crown model meet a preset reference crown shape design requirement, determining the reference crown model as a crown design data, the crown design data being a designed crown data or being used to provide a second user to perform a formal crown design on the prepared tooth.

[0019] In a third aspect, an embodiment of the present application further provides a crown design device, which comprises: a transceiving unit configured to obtain a prepared tooth dental arch model of a first user and occlusion relationship data of upper and lower jaws in the prepared tooth dental arch model; a processing unit configured to generate a temporary crown design model corresponding to a prepared tooth in the prepared tooth dental arch model; the transceiving unit is further configured to obtain a reference crown model, the reference crown model being a crown model obtained by scanning a reference crown, the reference crown being a crown obtained by polishing a temporary crown to meet a wearing condition of the crown, the temporary crown being a crown manufactured based on the temporary crown design model; the processing unit is further configured to determine position relationship data between the reference crown model and the prepared tooth dental arch model, and determine a crown design data according to the prepared tooth dental arch model, the reference crown model, the position relationship data and the occlusion relationship data, the crown design data being a designed crown data or being used to provide a second user to perform a formal crown design on the prepared tooth.

[0020] In a fourth aspect, an embodiment of the present application further provides another crown design device, which comprises: a transceiving unit configured to obtain a prepared tooth dental arch model of a first user and occlusion relationship data of upper and lower jaws in the prepared tooth dental arch model; a processing unit configured to generate a temporary crown design model corresponding to a prepared tooth in the prepared tooth dental arch model; the transceiving unit is further configured to obtain a reference crown model, the reference crown model being a crown model obtained by scanning a reference crown, the reference crown being a crown obtained by polishing a temporary crown to meet a wearing condition of the crown, the temporary crown being a crown manufactured based on the temporary crown design model; The processing unit is further configured to determine the reference crown model as the crown design data if the shape and the edge of the reference crown model meet preset reference crown shape design requirements, and the crown design data is designed crown data or is used to provide a second user with formal crown design for the prepared tooth.

[0021] In a fifth aspect, an embodiment of the present application further provides a computer device, which comprises a memory and a processor, the memory stores a computer program, and the processor implements the above method when executing the computer program.

[0022] In a sixth aspect, an embodiment of the present application further provides a computer readable storage medium, which stores a computer program, and the computer program comprises program instructions, and the program instructions can implement the above method when being executed by a processor.

[0023] Embodiments of the present application provide a crown design method, device and computer device. The present application first acquires a prepared tooth dental model of a first user (patient) and occlusion relationship data of the upper and lower jaws in the prepared tooth dental model, then generates a temporary crown design model corresponding to a prepared tooth in the prepared tooth dental model, prints a temporary crown on site based on the temporary crown design model, then wears the temporary crown in the patient's mouth, then a doctor grinds the temporary dental crown based on the wearing condition of the patient to obtain a reference dental crown meeting the wearing condition of the dental crown, then acquires a reference crown model of the reference dental crown by scanning, aligns the reference crown model to the prepared tooth dental model to determine position relationship data between the reference crown model and the prepared tooth dental model, and finally determines crown design data according to the prepared tooth dental model, the reference crown model, the position relationship data and the occlusion relationship data, and provides the crown design data to a second user for formal crown design of the prepared tooth. When designing a formal crown, a factory dental crown designer not only refers to the prepared tooth dental model and the occlusion relationship data, but also refers to the reference crown model with high adaptability to the patient and the position relationship data of the reference crown model in the prepared tooth dental model, which can improve the adaptability of the formal crown to the patient, thereby reducing the clinical grinding burden of the doctor, reducing the factory dental crown rework rate and improving the patient experience. BRIEF DESCRIPTION OF DRAWINGS

[0024] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0025] Figure 1 A flowchart of the crown design method provided by the embodiments of the present application is shown in the figure. Figure 2A sub-process diagram of the crown design method provided by the embodiment of the present application; Figure 3 An illustration of a temporary crown design model in the crown design method provided by the embodiment of the present application; Figure 4 An illustration of the case where there is a gap between adjacent reference crowns in the crown design method provided by the embodiment of the present application; Figure 5 An illustration of the case where there is a bite gap between adjacent reference crowns in the crown design method provided by the embodiment of the present application; Figure 6 An illustration of the case where the edge of the reference crown does not fit in the crown design method provided by the embodiment of the present application; Figure 7 Another sub-process diagram of the crown design method provided by the embodiment of the present application; Figure 8 Another sub-process diagram of the crown design method provided by the embodiment of the present application; Figure 9 A flow diagram of the crown design method provided by another embodiment of the present application; Figure 10 An illustrative block diagram of the crown design device provided by the embodiment of the present application; Figure 11 An illustrative block diagram of the computer device provided by the embodiment of the present application. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0027] It should be understood that, when used in the specification and the appended claims, the terms “comprise” and “include” indicate the presence of described features, integers, steps, operations, elements, and / or components, but do not exclude one or more other features, integers, steps, operations, elements, components, and / or groups thereof.

[0028] It should also be understood that the terms used in the present application specification are only for the purpose of describing specific embodiments and are not intended to limit the present application. As used in the present application specification and the appended claims, unless otherwise clearly indicated by the context, the singular forms “a”, “an” and “the” are intended to include the plural forms.

[0029] It should also be further understood that the term "and / or" used in the description and the appended claims of the present application means any combination of one or more of the associated listed items and all possible combinations, and includes these combinations.

[0030] Embodiments of the present application provide a crown design method and device and a computer device.

[0031] The execution subject of the crown design method can be a crown design device provided by embodiments of the present application, or a computer device integrated with the crown design device, wherein the crown design device can be realized in the form of hardware or software, and the computer device can be a terminal or a server, the terminal can be a scanning device, a smart phone, a tablet computer, a palm computer, or a notebook computer, etc., and the server can be a local server or a cloud server. It can be seen that the crown design method provided by the embodiments of the present application can be applied in the local or cloud.

[0032] The scanning device can be a desktop scanner or a handheld scanner, and the scanning device can be an intraoral scanner or an extraoral scanner. For example, in some scenarios, the scanning device can scan the patient's oral cavity, crown, etc., and then process the obtained scanning data. In some scenarios, the scanning device can scan the patient's oral cavity, scanning body, impression, etc., and then send the scanning data to other devices (such as a user's mobile phone, computer, etc.) in wired or wireless communication with the scanning device, and then process the scanning data by the other devices.

[0033] Figure 1 is a flowchart of the crown design method provided by embodiments of the present application. As shown in Figure 1 the method comprises the following steps S110-S140.

[0034] S110, obtaining the prepared tooth dental model of the first user and the occlusion relationship data of the upper and lower jaws in the prepared tooth dental model, and generating a temporary crown design model corresponding to the prepared tooth in the prepared tooth dental model.

[0035] In the present embodiment, the first user is a patient who currently needs to undergo crown repair, and the prepared tooth dental model of the first user can be obtained by directly scanning the patient's oral cavity through an oral scanner after the patient's teeth are prepared, or pulled from a cloud or local database (at this time, the prepared tooth dental model is pre-acquired and stored in the cloud or local database before being pulled for use).

[0036] The occlusion relationship data can be obtained by the occlusion splicing function of the oral scanning software when the dental scanner scans the patient's oral cavity to obtain the tooth preparation dental model, and is pulled from the cloud or local database (at this time, the occlusion relationship data of the tooth preparation dental model is calculated in advance, and is then associated and stored with the tooth preparation dental model to the cloud or local database, and is pulled when used). The oral scanning software can be installed in the dental scanner or in the computer device provided in the application. In the tooth preparation dental model, the upper jaw sub-model and the lower jaw sub-model are included, and the upper jaw sub-model and / or the lower jaw sub-model include at least one prepared tooth and a non-prepared tooth. The prepared tooth refers to the remaining tooth after the tooth to be repaired is polished, and the non-prepared tooth refers to the tooth model that does not need to be repaired.

[0037] With the popularization of chair-side rapid temporary crown design software and the promotion of printer clinic end, doctors can use chair-side rapid design and printing to print temporary crowns for patients. It should be noted that in the embodiments of the present application, only doctors are used as examples to illustrate the performers of temporary crown printing and crown polishing. In actual application, temporary crown printing and crown polishing can also be performed by other users such as medical students or other technicians. The specific identity of the performer is not limited in the present embodiment.

[0038] Specifically, please refer to Figure 2 In some embodiments, the temporary crown design model can be generated by the following steps: S1101, obtaining a standard tooth model corresponding to the tooth position number of the prepared tooth; S1102, registering the standard tooth model and the prepared tooth to obtain a target tooth model matched with the prepared tooth; S1103, generating a temporary crown design model according to the target tooth model and the prepared tooth.

[0039] Specifically, the temporary crown design model is generated according to the target tooth model and the prepared tooth, including: generating an initial crown model according to the target tooth model and the prepared tooth; and performing adaptive adjustment processing on the initial crown model based on a preset temporary crown design model and the tooth preparation dental model to obtain the temporary crown design model.

[0040] In this embodiment, a standard model database is provided, which stores a standard tooth model corresponding to each tooth position number in the oral cavity. In this embodiment, a standard tooth model corresponding to the tooth position number of the prepared tooth is obtained from the standard model database, and then the standard tooth model and the prepared tooth are registered to obtain a target tooth model. Finally, part of the prepared tooth model is subtracted from the target tooth model to obtain an initial crown model, and then the initial crown model is adaptively adjusted by a preset temporary crown software to obtain a temporary crown design model. The adaptive adjustment process includes template tooth adjustment (there are multiple standard tooth models corresponding to the tooth position number, and the most suitable standard tooth model is found by adjustment), abutment state adjustment, and occlusion adjustment.

[0041] The generated temporary crown design model is as shown in Figure 3

[0042] S120, a reference crown model is obtained, the reference crown model being a crown model obtained by scanning a reference crown, the reference crown being a crown that meets the wearing conditions of the crown after the temporary crown is polished, and the temporary crown being a crown manufactured based on the temporary crown design model.

[0043] In this embodiment, the temporary crown that meets the wearing conditions of the crown after polishing adjustment is determined as the reference crown. The reference crown model of this embodiment can be obtained by directly scanning the reference crown by a scanner alone, or can be obtained by pulling from a cloud or local database (at this time, the reference crown model is pre-acquired and stored in the cloud or local database, and then pulled when used). If obtained by pulling from the cloud or local database, the reference crown model can be associated with the dental jaw model of the prepared tooth through the user identifier corresponding to the first user, and data associated with the first user, such as the reference crown model and the dental jaw model of the prepared tooth, are stored in the same folder to avoid data confusion and facilitate subsequent model pulling.

[0044] The reference crown model is a model obtained by scanning the outer crown of the reference crown (without scanning the inner crown), or a model obtained by scanning both the outer crown and the inner crown of the reference crown.

[0045] In some embodiments, after obtaining the reference crown model, the method further comprises: performing a scanning integrity judgment on the obtained reference crown model, and if the scanning is incomplete, a prompt information can be sent to prompt the user to perform supplementary scanning.

[0046] The oral cavity scanning devices of steps S110 and S120 can be the same, which facilitates data merging. In another embodiment, step S120 can also use a desktop scanning device to scan the reference crown, so as to make the reference crown model more accurate.

[0047] ​In some embodiments, before the reference crown model is obtained, the method further comprises: obtaining a crown-wearing dental arch intermediate model, the crown-wearing dental arch intermediate model being a model obtained by scanning the oral cavity of the first user wearing an intermediate dental crown on the prepared teeth of the first user, the intermediate dental crown being a dental crown obtained in the process of the second user grinding the temporary dental crown; performing a preset verification on the intermediate dental crown based on the crown-wearing dental arch intermediate model, the preset verification comprising one or more of an adjacent space verification, an occlusion space verification, an edge fit verification, and an occlusion simulation verification, the occlusion simulation verification comprising one or more of a static occlusion simulation verification and a dynamic occlusion simulation verification; if the verification results of the preset verification are all passed, it is determined that the intermediate dental crown meets the dental crown wearing condition, and the intermediate dental crown is taken as the reference dental crown; if the verification results of the preset verification include a failed verification, a prompt information is sent or a corresponding modification scheme is generated.

[0048] Specifically, the temporary dental crown of the present embodiment can be printed or cut based on a temporary crown design model. The manufacture of the temporary dental crown will be described below only by taking the case that the temporary dental crown is printed based on a temporary crown design model.

[0049] In the present embodiment, after the temporary dental crown is printed, the first user tries on the temporary dental crown, and then the doctor adjusts the temporary dental crown according to the actual wearing condition of the first user, for example, performs corresponding adjacent and occlusion grinding adjustment and edge fit grinding adjustment. The temporary dental crown in the adjustment process is referred to as an intermediate dental crown in the present embodiment, and the crown form after adjustment that meets the actual situation in the patient's mouth (i.e., meets the dental crown wearing condition) is determined as a reference dental crown.

[0050] In the present embodiment, the adjacent space verification, the occlusion space verification, the edge fit verification, and the occlusion simulation verification are used to determine whether the intermediate dental crown meets the dental crown wearing condition.

[0051] The adjacent space verification is performed by the following steps: The adjacent tooth spacing between the intermediate dental crown and the adjacent teeth of the intermediate dental crown is determined based on the crown-wearing dental arch intermediate model; if the adjacent tooth spacing is less than a preset adjacent tooth spacing threshold, an artificial adjacent verification prompt is generated, the artificial adjacent verification prompt instructing the doctor to perform artificial adjacent verification on the adjacent tooth spacing; if an artificial adjacent verification passed information is received, the verification passed is determined as the verification result of the adjacent space verification; if the adjacent tooth spacing is greater than or equal to the preset adjacent tooth spacing threshold, or an artificial adjacent verification failed information is received, the verification failed is determined as the verification result of the adjacent space verification.

[0052] Specifically, when the first user wears the intermediate dental crown, after obtaining the dental arch intermediate model of the crown by scanning, the adjacent tooth spacing between the intermediate dental crown and the adjacent teeth of the intermediate dental crown is calculated based on the dental arch intermediate model of the crown. If the adjacent tooth spacing is less than the preset adjacent tooth spacing threshold, the doctor is prompted to perform manual adjacent check on the adjacent tooth spacing at this time. At this time, the doctor can verify whether the adjacent tooth spacing meets the requirements through dental floss.

[0053] If the adjacent tooth spacing is greater than or equal to the preset adjacent tooth spacing threshold, the doctor can also be prompted that there is a gap between the current intermediate dental crown tooth and the adjacent tooth, and the temporary crown design model needs to be reprinted for adjustment. If the manual adjacent check fails, the tooth interproximal gap is too narrow, at this time, a modification scheme is generated to prompt the doctor to polish the adjacent edge of the intermediate dental crown.

[0054] The schematic diagram of the gap between the reference crown and the adjacent tooth is shown in Figure 4

[0055] The occlusion gap check is performed through the following steps: The interarch tooth spacing between the intermediate dental crown and the opposite dental arch of the intermediate dental crown is determined based on the dental arch intermediate model of the crown. If the interarch tooth spacing is less than the preset interarch tooth spacing threshold, the oral texture image of the dental arch intermediate model of the crown is obtained, and the oral texture image includes a test paper occlusion impression. The occlusion area of the intermediate dental crown is determined through the test paper occlusion impression. If the occlusion area is greater than or equal to the preset area threshold, the check is determined as the check result of the occlusion gap check. If the interarch tooth spacing is greater than or equal to the preset interarch tooth spacing threshold, or the occlusion area is less than the preset area threshold, the check is determined as the check result of the occlusion gap check.

[0056] Specifically, when the first user wears the intermediate dental crown, after obtaining the dental arch intermediate model of the crown by scanning, the interarch tooth spacing between the intermediate dental crown and the opposite dental arch of the intermediate dental crown is calculated based on the dental arch intermediate model of the crown. The interarch tooth spacing is the spacing between the intermediate dental crown and the opposite dental arch under the closed state of the upper and lower dental arches. If the interarch tooth spacing is less than the preset interarch tooth spacing threshold, the oral texture image of the dental arch intermediate model of the crown is further obtained, and the occlusion gap check is performed through the test paper occlusion impression in the oral texture image. The area of the test paper occlusion impression indicates the contact area of the upper and lower dental arches. If the area is too small, it indicates that the contact area between the intermediate dental crown and the opposite dental arch is too small, and the occlusion gap check fails. If the area is greater than or equal to the preset area threshold, it is determined that the occlusion gap check passes.

[0057] ​If the interocclusal distance of the antagonist tooth is greater than or equal to the preset interocclusal distance threshold value, or the occlusal area is less than the preset area threshold value, the doctor can also be prompted that the current intermediate crown tooth interproximal space exists, and the temporary crown design model needs to be reprinted for re-adjustment.

[0058] A schematic diagram of the reference crown existing occlusal space is shown in Figure 5

[0059] The edge fitting verification is performed by the following steps: Based on the intermediate model of the tooth with the crown, it is determined whether the edge of the intermediate crown and the cervical margin line of the prepared tooth fit; if they fit, the verification passes and is determined as the verification result of the edge fitting verification; if they do not fit, the verification fails and is determined as the verification result of the edge fitting verification.

[0060] Specifically, the edge of the intermediate crown in the intermediate model of the tooth with the crown and the cervical margin line of the prepared tooth are extracted, and then it is determined whether the edge of the intermediate crown and the cervical margin line of the prepared tooth coincide; if they coincide, it is determined that they fit; if they do not coincide, it is determined that they do not fit.

[0061] A schematic diagram of the reference crown edge not fitting is shown in Figure 6

[0062] In some other embodiments, the interproximal space verification, the occlusal space verification, and the edge fitting verification can be performed manually by the doctor to determine whether the intermediate crown meets the tooth crown wearing condition.

[0063] The static occlusion simulation verification is used to verify whether there is a static occlusion high point on the intermediate crown; if there is not, the verification passes and is determined as the verification result of the static occlusion simulation verification; if there is, the verification fails and is determined as the verification result of the static occlusion simulation verification, a prompt for the verification failure is generated, and a modification scheme is generated, which indicates that the static occlusion high point on the intermediate crown is removed and includes specific position information of the static occlusion high point on the intermediate crown.

[0064] The dynamic occlusion simulation verification is used to verify whether there is a dynamic occlusion high point on the intermediate crown; if there is not, the verification passes and is determined as the verification result of the dynamic occlusion simulation verification; if there is, the verification fails and is determined as the verification result of the dynamic occlusion simulation verification, a prompt for the verification failure is generated, and a modification scheme is generated, which indicates that the dynamic occlusion high point on the intermediate crown is removed and includes specific position information of the dynamic occlusion high point on the intermediate crown.

[0065] ​​In addition, the embodiment also presets that each check result of the check result is added to subsequent crown design data, so that the second user can refer to more information when designing the formal crown, and generate a formal crown that is more suitable for the patient. The second user is a user who designs the formal crown, and can be a factory crown designer, a doctor, a medical staff, a student, a technician, or the like. Hereinafter, the factory crown designer is taken as an example.

[0066] S130, determine the position relationship data between the reference crown model and the prepared tooth dental model.

[0067] In the embodiment, the reference crown model is aligned to the corresponding prepared tooth position in the prepared tooth dental model, so as to determine the position relationship data between the reference crown model and the prepared tooth dental model.

[0068] Since there is no common data area between the reference crown model and the prepared tooth dental model, it is difficult to directly align the reference crown model and the prepared tooth dental model. The crown-wearing dental model is a dental model obtained by scanning the oral cavity of the first user when the first user wears the reference crown on the prepared tooth, and the crown-wearing dental model not only includes the common data area between the prepared tooth dental model, but also includes the common data area between the reference crown model. The embodiment indirectly aligns the reference crown model and the prepared tooth dental model through the crown-wearing dental model. Specifically, please refer to Figure 7 , step S130 includes: S1301, obtain the crown-wearing dental model, and align the crown-wearing dental model and the prepared tooth dental model to obtain first alignment data. The crown-wearing dental model is a dental model obtained by scanning the oral cavity of the first user when the first user wears the reference crown on the prepared tooth; S1302, align the reference crown model and the crown-wearing dental model to obtain second alignment data; S1303, determine the position relationship data according to the first alignment data and the second alignment data.

[0069] Specifically, according to the crown-wearing dental model in the first alignment data and the second alignment data, the reference crown model and the prepared tooth dental model are aligned to obtain a target position of the reference crown model in the prepared tooth dental model; and the position relationship data between the reference crown model and the prepared tooth dental model is determined according to the target position.

[0070] It can be seen that the embodiment can indirectly align the reference crown model and the prepared tooth dental model through the crown-wearing dental model.

[0071] Due to insufficient distance, the abutment data (abutment morphology) between the reference crown and the adjacent teeth when the first user wears the crown cannot be directly obtained by scanning, and this part is exactly the morphology part that the second user is interested in. The embodiment can align the reference crown model and the prepared tooth dental model through the crown dental model to obtain the abutment data between the reference crown and the adjacent teeth when the user wears the crown, thereby solving the problem that the abutment data cannot be directly obtained by scanning.

[0072] In some embodiments, the first alignment data, the second alignment data, and the positional relationship data can be a position conversion matrix.

[0073] In some embodiments, the positional relationship data between the reference crown model and the prepared tooth dental model can also be determined by the following steps: The inner surface of the reference crown model and the outer surface of the prepared tooth in the prepared tooth dental model are identified, and the inner surface and the outer surface are aligned to determine the positional relationship data between the reference crown model and the prepared tooth dental model. The identification of the inner surface of the reference crown model and the outer surface of the prepared tooth in the prepared tooth dental model can be achieved by a tooth segmentation model, a semantic recognition model, or an AI recognition model.

[0074] In addition, in some embodiments, the positional relationship data between the reference crown model and the prepared tooth dental model can also be determined by the following steps: The axis of the reference crown model and the axis of the prepared tooth in the prepared tooth dental model are extracted, and the positional relationship data between the reference crown model and the prepared tooth dental model is determined by aligning the two axes. The extraction of the axis can be determined by geometric calculation or an AI model.

[0075] In addition, the positional relationship data between the reference crown model and the prepared tooth dental model can also be determined by an AI model with crown and prepared tooth alignment function.

[0076] S140, determining the crown design data according to the prepared tooth dental model, the reference crown model, the positional relationship data, and the occlusion relationship data, the crown design data being a designed crown data or a data used to provide the second user to perform formal crown design on the prepared tooth.

[0077] In some embodiments, the local or cloud directly designs a formal crown model data through an AI model according to the prepared tooth dental model, the reference crown model, the positional relationship data, and the occlusion relationship data, and takes the formal crown model data as the crown design data. Subsequently, a formal crown can be manufactured based on the crown design data (such as sent to a printing device or a cutting device for direct printing or manufacturing), or the second user can be sent to manufacture a formal crown based on the crown design data.

[0078] In some embodiments, the tooth preparation dental model, the reference crown model, the position relationship data and the occlusion relationship data are packaged to generate the crown design data, so that the second user can design the formal crown based on the reference to the crown design data. After the second user completes the design, the designed data can be sent back to the first user for manufacturing the formal crown, or the second user can directly manufacture the formal crown.

[0079] In some embodiments, the crown design data in the present embodiment further includes the proximal surface data between the reference crown model and the adjacent tooth of the prepared tooth, and the cervical margin fit data between the reference crown model and the prepared tooth. The second user does not need to judge the proximal surface data and the cervical margin fit data by naked eye, thereby improving the design efficiency and the fitting degree of the formal crown. Specifically, please refer to Figure 8 , step S140 includes: S1401, aligning the reference crown model to the tooth preparation dental model based on the position relationship data to obtain a tooth model with a crown target model; S1402, calculating the proximal surface data between the reference crown model and the adjacent tooth of the prepared tooth, and the cervical margin fit data between the reference crown model and the prepared tooth in the tooth model with the crown target model; S1403, determining the crown design data according to the tooth preparation dental model, the reference crown model, the position relationship data, the occlusion relationship data, the proximal surface data and the cervical margin fit data.

[0080] The reference crown model includes a plurality of grid points, the proximal surface data includes the closest distance value of each grid point in the proximal surface (the closest surface to the adjacent tooth) of the reference crown model to the adjacent tooth, and the cervical margin fit data includes the cervical margin fit line information (cervical margin fit form) of the reference crown model in the prepared tooth.

[0081] It can be seen that the tooth model with the crown target model obtained in the present embodiment has the adjacent tooth data and the cervical margin data unique to the tooth preparation dental model, so that more proximal surface data and cervical margin fit data can be calculated. Therefore, the crown design data provided to the second user (factory crown designer) in the present embodiment includes not only the tooth preparation dental model and the occlusion relationship data, but also the reference crown model, the position relationship data of the reference crown model in the tooth preparation dental model, the proximal surface data of the reference crown model and the cervical margin fit data.

[0082] Further, in some embodiments, after obtaining the crown design data, the computer device will automatically send the crown design data to the user terminal corresponding to the second user, so that the second user can obtain the crown design data for the formal crown design of the first user.

[0083] In summary, the application first acquires the tooth preparation dental model of the first user (patient) and the occlusion relationship data of the upper and lower jaws in the tooth preparation dental model, then generates a temporary crown design model corresponding to the prepared tooth in the tooth preparation dental model, prints the temporary crown on site based on the temporary crown design model, then wears the temporary crown in the patient's mouth, and the doctor polishes the temporary crown based on the wearing condition of the patient to obtain a reference crown that meets the wearing condition of the crown, and then acquires the reference crown model of the reference crown by scanning, aligns the reference crown model to the tooth preparation dental model to determine the positional relationship data between the reference crown model and the tooth preparation dental model, and finally determines the crown design data according to the tooth preparation dental model, the reference crown model, the positional relationship data and the occlusion relationship data, and provides the crown design data to the second user (factory crown designer) to design the formal crown for the prepared tooth. When designing the formal crown, the factory crown designer not only refers to the tooth preparation dental model and the occlusion relationship data, but also refers to the reference crown model with high adaptability to the patient, and can also refer to the positional relationship data of the reference crown model in the tooth preparation dental model. Based on the related data of the reference crown in the mouth, the adaptability of the subsequent designed formal crown to the patient can be improved, thereby reducing the clinical polishing burden of the doctor, reducing the rework rate of the factory crown and improving the patient experience.

[0084] Specifically, in the application, after collecting the patient data, the doctor uses a digital design tool to quickly generate a temporary crown shape. After printing the temporary crown, wear the tooth, polish some occlusion, abutment high point, and trim the edge. At this time, the polished temporary crown shape (reference crown) conforms to the actual occlusion and abutment condition in the patient's mouth. By scanning the polished temporary crown shape, the processing factory sends the reference for processing. The processing factory designs the shape of the formal crown based on the temporary crown, which can avoid some rework or later polishing adjustment of the crown. In some embodiments, the application also scans the situation of the polished temporary crown shape in the mouth to obtain a crown-wearing dental model and a crown-wearing dental target model, so as to obtain related data of the reference crown in the mouth, further improving the adaptability of the subsequent designed formal crown to the patient.

[0085] The technical solution provided by the application brings the patient's in-mouth trial tooth to the data sending processing factory in advance, so that the actual situation of the patient's in-mouth tooth wearing and the actual contact shape of the crown can be known in advance. The processing factory refers to the crown data polished after the patient wears the trial tooth, which can greatly reduce the deviation during design and avoid some polishing and rework in the later stage.

[0086] Please refer to Figure 9 , Figure 9 The flowchart of the crown design method provided by another embodiment of the application includes steps S210-S230: S210, acquire the prepared tooth dental model of the first user and the occlusion relationship data of the upper and lower jaws in the prepared tooth dental model, and generate a temporary crown design model corresponding to the prepared tooth in the prepared tooth dental model; S220, acquire a reference crown model, the reference crown model being a dental crown model obtained by scanning a reference dental crown, the reference dental crown being a dental crown obtained after polishing a temporary dental crown, the temporary dental crown being a dental crown manufactured based on the temporary crown design model; In this embodiment, the reference crown model is a dental crown model obtained by scanning the inner crown and the outer crown of the reference dental crown.

[0087] Steps S210-S220 are similar to steps S110-S120, and will not be described here.

[0088] S230, if the shape and edge of the reference crown model meet the preset reference crown shape design requirement, the reference crown model is determined as the dental crown design data, the dental crown design data being the designed dental crown data or the data used to provide the second user with the formal dental crown design for the prepared tooth.

[0089] The shape of the reference crown model includes the surface shape of the reference crown model, the edge of the reference crown model includes the neck edge line of the reference crown model, the reference crown shape design requirement includes that the outer surface of the reference crown model has no hole, and the difference degree of the neck edge line of the reference crown model does not exceed a threshold value, wherein whether the outer surface of the reference crown model has a hole can be determined by manual judgment or by AI model intelligent judgment, and whether the difference degree of the neck edge line of the reference crown model exceeds the threshold value can be determined by manually judging whether the distance between the neck edge line of the reference crown model and the prepared tooth exceeds the threshold value when the prepared tooth of the first user wears the reference dental crown, or by AI model intelligent judgment whether the distance between the neck edge line and the prepared tooth exceeds the threshold value.

[0090] In addition, if the shape and / or edge of the reference crown model does not meet the preset reference crown shape design requirement, the position relationship data between the reference crown model and the prepared tooth dental model is determined; and the dental crown design data is determined according to the prepared tooth dental model, the reference crown model, the position relationship data and the occlusion relationship data.

[0091] In this embodiment, the specific steps of determining the position relationship data between the reference crown model and the prepared tooth dental model are similar to those of step S130, and will not be described here. The specific steps of determining the dental crown design data according to the prepared tooth dental model, the reference crown model, the position relationship data and the occlusion relationship data are similar to those of step S140, and will not be described here.

[0092] In summary, the embodiment provides a reference crown model for the factory designer to design a formal crown, and since the reference crown corresponding to the reference crown model is a crown that meets the wearing conditions of the patient after the temporary crown is polished, the factory designer can improve the fitting degree of the formal crown to the patient based on the reference crown model, thereby reducing the burden of clinical polishing of the doctor, reducing the rework rate of the factory crown, and improving the patient experience.

[0093] Figure 10 is a schematic block diagram of a crown design device provided by an embodiment of the present application. As shown in Figure 10 corresponding to the crown design method described above, the present application also provides a crown design device 900. The crown design device 900 includes units for executing the crown design method described above, and the crown design device 900 can be configured in a desktop computer, a tablet computer, a laptop computer, and the like. Specifically, please refer to Figure 10 The crown design device 900 includes a transceiver unit 901 and a processing unit 902, wherein: The transceiver unit 901 is configured to obtain a prepared tooth dental model of a first user and occlusion relationship data of the upper and lower jaws in the prepared tooth dental model; The processing unit 902 is configured to generate a temporary crown design model corresponding to the prepared tooth in the prepared tooth dental model; The transceiver unit 901 is further configured to obtain a reference crown model, the reference crown model being a crown model obtained by scanning a reference crown, the reference crown being a crown that meets the wearing conditions of the crown after the temporary crown is polished, and the temporary crown being a crown manufactured based on the temporary crown design model; The processing unit 902 is further configured to determine position relationship data between the reference crown model and the prepared tooth dental model, and determine crown design data based on the prepared tooth dental model, the reference crown model, the position relationship data, and the occlusion relationship data, the crown design data being designed crown data or data used to provide a second user to design a formal crown for the prepared tooth.

[0094] In some embodiments, when the processing unit 902 performs the step of aligning the reference crown model and the prepared tooth dental model to determine the position relationship data between the reference crown model and the prepared tooth dental model, it is specifically configured to: Obtain a crown-wearing dental model through the transceiver unit 901, and align the crown-wearing dental model and the prepared tooth dental model to obtain first alignment data, the crown-wearing dental model being a dental model obtained by scanning the oral cavity of the first user when the prepared tooth wears the reference crown; align the reference crown model and the crown-wearing dental model to obtain second alignment data; and determine the position relationship data based on the first alignment data and the second alignment data.

[0095] In some embodiments, the processing unit 902, in a step of determining the position relationship data according to the first alignment data and the second alignment data, is specifically configured to: align the reference crown model and the prepared tooth model according to the crown-wearing tooth model in the first alignment data and the crown-wearing tooth model in the second alignment data, to obtain a target position of the reference crown model in the prepared tooth model; and determine the position relationship data between the reference crown model and the prepared tooth model according to the target position.

[0096] In some embodiments, the processing unit 902, in a step of determining the crown design data according to the prepared tooth model, the reference crown model, the position relationship data, and the occlusion relationship data, is specifically configured to: align the reference crown model to the prepared tooth model based on the position relationship data to obtain a target crown-wearing tooth model; calculate, in the target crown-wearing tooth model, the proximal surface data between the reference crown model and the adjacent teeth of the prepared tooth, and the cervical margin fit data between the reference crown model and the prepared tooth; and determine the crown design data according to the prepared tooth model, the reference crown model, the position relationship data, the occlusion relationship data, the proximal surface data, and the cervical margin fit data.

[0097] In some embodiments, before the transceiver 901 performs the step of obtaining the reference crown model, the processing unit 902 is further configured to: obtain, through the transceiver, a target crown-wearing tooth model, the target crown-wearing tooth model being a model obtained by scanning the oral cavity of the first user while wearing an intermediate crown on the prepared tooth of the first user, the intermediate crown being a crown obtained in the process of grinding the temporary crown by the second user; perform a preset verification on the intermediate crown based on the target crown-wearing tooth model, the preset verification including one or more of proximal surface clearance verification, occlusion clearance verification, edge fit verification, and occlusion simulation verification, the occlusion simulation verification including one or more of static occlusion simulation verification and dynamic occlusion simulation verification; if the verification results of the preset verification are all passed, it is determined that the intermediate crown meets the crown wearing condition, and the intermediate crown is taken as the reference crown; and if the verification results of the preset verification include a failed verification, a prompt information is sent or a corresponding modification scheme is generated.

[0098] wear an intermediate crown on the prepared tooth of the first user, and scan the oral cavity of the first user to obtain a target crown-wearing tooth model, the intermediate crown being a crown obtained in the process of grinding the temporary crown; perform proximal surface clearance verification, occlusion clearance verification, and edge fit verification on the intermediate crown based on the target crown-wearing tooth model; if the verification results of the proximal surface clearance verification, the occlusion clearance verification, and the edge fit verification are all passed, it is determined that the intermediate crown meets the crown wearing condition, and the intermediate crown is taken as the reference crown.

[0099] In some embodiments, the processing unit 902 performs the adjacent space checking by the following steps: determining an adjacent tooth spacing between the intermediate crown and an adjacent tooth of the intermediate dental arch model; if the adjacent tooth spacing is less than a preset adjacent tooth spacing threshold, generating an artificial adjacent checking prompt, the artificial adjacent checking prompt instructing the doctor to perform artificial adjacent checking on the adjacent tooth spacing; if receiving artificial adjacent checking pass information, determining the checking pass as the checking result of the adjacent space checking; if the adjacent tooth spacing is greater than or equal to the preset adjacent tooth spacing threshold, or receiving artificial adjacent checking fail information, determining the checking fail as the checking result of the adjacent space checking.

[0100] In some embodiments, the processing unit 902 performs the occlusal space checking by the following steps: determining an opposite tooth spacing between the intermediate crown and an opposite tooth of the intermediate dental arch model; if the opposite tooth spacing is less than a preset opposite tooth spacing threshold, obtaining a mouth texture image of the intermediate dental arch model, the mouth texture image including a trial paper bite impression; determining an occlusal area of the intermediate crown through the trial paper bite impression; if the occlusal area is greater than or equal to a preset area threshold, determining the checking pass as the checking result of the occlusal space checking; if the opposite tooth spacing is greater than or equal to the preset opposite tooth spacing threshold, or the occlusal area is less than the preset area threshold, determining the checking fail as the checking result of the occlusal space checking.

[0101] In some embodiments, the processing unit 902 performs the edge fit checking by the following steps: determining whether the edge of the intermediate crown fits the cervical margin line of the prepared tooth based on the intermediate dental arch model of the fitted crown; if fitting, determining the checking pass as the checking result of the edge fit checking; if not fitting, determining the checking fail as the checking result of the edge fit checking.

[0102] In some embodiments, the processing unit 902, when performing the step of generating the temporary crown design model corresponding to the prepared tooth of the prepared dental arch model, is specifically configured to: obtain a standard tooth model corresponding to the tooth position number of the prepared tooth through the transceiver 901; register the standard tooth model and the prepared tooth to obtain a target tooth model matched with the prepared tooth; and generate the temporary crown design model according to the target tooth model and the prepared tooth.

[0103] In some embodiments, the processing unit 902, when performing the step of generating the temporary crown design model according to the target tooth model and the prepared tooth, is specifically configured to: According to the target tooth model and the prepared tooth, an initial crown model is generated; and based on a preset temporary crown design model and the prepared tooth model, the initial crown model is adaptively adjusted to obtain the temporary crown design model.

[0104] In some embodiments, after the processing unit 902 performs the step of determining the crown design data according to the prepared tooth model, the reference crown model, the position relationship data and the occlusion relationship data, the transceiver unit 901 is further configured to: send the crown design data to the user terminal corresponding to the second user.

[0105] In summary, the crown design device 900 provided by the present application first acquires the prepared tooth model of the first user (patient) and the occlusion relationship data of the upper and lower jaws in the prepared tooth model, then generates a temporary crown design model corresponding to the prepared tooth in the prepared tooth model, and prints a temporary crown on site based on the temporary crown design model, then wears the temporary crown in the patient's mouth, the second user (doctor) grinds the temporary crown based on the wearing condition of the patient to obtain a reference crown that meets the wearing condition of the crown, and then acquires a reference crown model of the reference crown by scanning, aligns the reference crown model to the prepared tooth model to determine the position relationship data between the reference crown model and the prepared tooth model, and finally determines the crown design data according to the prepared tooth model, the reference crown model, the position relationship data and the occlusion relationship data, and provides the crown design data to the second user (factory crown designer) to design the formal crown for the prepared tooth. When designing the formal crown, the factory crown designer not only refers to the prepared tooth model and the occlusion relationship data, but also refers to the reference crown model with high adaptability to the patient and the position relationship data of the reference crown model in the prepared tooth model, which can improve the adaptability of the formal crown to the patient, thereby reducing the clinical grinding burden of the doctor, reducing the factory crown rework rate and improving the patient experience.

[0106] In another embodiment, the processing unit 902 is further configured to determine the reference crown model as the crown design data if the shape and edge of the reference crown model meet the preset reference crown shape design requirements, and the crown design data is the designed crown data or is used to provide the second user to design the formal crown for the prepared tooth.

[0107] It should be noted that those skilled in the art can clearly understand the specific implementation process of the above crown design device and each unit, which can refer to the corresponding description in the foregoing method embodiments, and for the convenience and brevity of description, it will not be repeated here.

[0108] The above crown design device can be implemented in the form of a computer program, which can run on a computer device as shown in Figure 11 .

[0109] Please refer to Figure 11 , Figure 11 is a schematic block diagram of a computer device provided by an embodiment of the present application. The computer device 1000 can be a terminal or a server.

[0110] Please refer to Figure 11 The computer device 1000 includes a processor 1002, a memory and a network interface 1005 connected through a system bus 1001, wherein the memory can include a non-volatile storage medium 1003 and an internal memory 1004.

[0111] The non-volatile storage medium 1003 can store an operating system 10031 and a computer program 10032. The computer program 10032 includes program instructions which, when executed, can cause the processor 1002 to perform a dental crown design method.

[0112] The processor 1002 is configured to provide computing and control capabilities to support the operation of the entire computer device 1000.

[0113] The internal memory 1004 provides an environment for the execution of the computer program 10032 in the non-volatile storage medium 1003, which, when executed by the processor 1002, can cause the processor 1002 to perform a dental crown design method.

[0114] The network interface 1005 is configured to perform network communication with other devices. Those skilled in the art can understand that Figure 11 The structure shown in the figure is only a block diagram of part of the structure related to the scheme of the present application, and does not constitute a limitation on the computer device 1000 to which the scheme of the present application is applied. The specific computer device 1000 can include more or fewer components than those shown in the figure, or combine certain components, or have a different arrangement of components.

[0115] The processor 1002 is configured to run the computer program 10032 stored in the memory to implement the following steps: Obtain the prepared tooth dental model of the first user and the occlusion relationship data of the upper and lower jaws in the prepared tooth dental model, and generate a temporary crown design model corresponding to the prepared tooth in the prepared tooth dental model; Obtain a reference crown model, the reference crown model being a dental crown model obtained by scanning a reference dental crown, the reference dental crown being a dental crown obtained by polishing a temporary dental crown to meet the wearing conditions of the dental crown, and the temporary dental crown being a dental crown manufactured based on the temporary crown design model; Align the reference crown model and the prepared tooth dental model to determine the positional relationship data between the reference crown model and the prepared tooth dental model; The tooth crown design data is determined according to the prepared tooth dental arch model, the reference tooth crown model, the position relationship data and the occlusion relationship data, and the tooth crown design data is designed tooth crown data or is used to provide a second user to perform formal tooth crown design on the prepared tooth.

[0116] It should be understood that, in the embodiments of the present application, the processor 1002 can be a central processing unit (CPU), and the processor 1002 can also be other general-purpose processors, digital signal processors (DSPs), application specific integrated circuits (ASICs), field programmable gate arrays (FPGAs) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components, etc. The general-purpose processor can be a microprocessor or the processor can also be any conventional processor.

[0117] It can be understood by those skilled in the art that all or part of the processes in the method of the above-mentioned embodiments can be completed by a computer program instructing related hardware. The computer program includes program instructions, and the computer program can be stored in a storage medium, which is a computer readable storage medium. The program instructions are executed by at least one processor in the computer system to implement the process steps of the above-mentioned embodiments of the method.

[0118] Therefore, the present application also provides a storage medium. The storage medium can be a computer readable storage medium. The storage medium stores a computer program, wherein the computer program includes program instructions. The program instructions are executed by the processor to make the processor perform the following steps: obtaining a prepared tooth dental arch model of a first user and occlusion relationship data of the upper and lower jaws in the prepared tooth dental arch model, and generating a temporary crown design model corresponding to the prepared tooth in the prepared tooth dental arch model; obtaining a reference tooth crown model, the reference tooth crown model being a tooth crown model obtained by scanning a reference tooth crown, the reference tooth crown being a tooth crown obtained by grinding a temporary tooth crown to meet the wearing conditions of the tooth crown, and the temporary tooth crown being a tooth crown manufactured based on the temporary crown design model; aligning the reference tooth crown model and the prepared tooth dental arch model to determine position relationship data between the reference tooth crown model and the prepared tooth dental arch model; determining tooth crown design data according to the prepared tooth dental arch model, the reference tooth crown model, the position relationship data and the occlusion relationship data, the tooth crown design data being designed tooth crown data or being used to provide a second user to perform formal tooth crown design on the prepared tooth.

[0119] The storage medium can be a U disk, a mobile hard disk, a read-only memory (ROM), a magnetic disk or an optical disk, and the like various computer readable storage media that can store program codes.

[0120] Those skilled in the art can understand that the units and algorithm steps of each example described in combination with the embodiments disclosed herein can be realized in electronic hardware, computer software or a combination of both. In order to clearly illustrate the interchangeability of hardware and software, the components and steps of each example have been described in the above description in general terms. Whether the functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. A person skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of the present application.

[0121] In several embodiments provided in the present application, it should be understood that the disclosed apparatus and method can be implemented in other ways. For example, the apparatus embodiments described above are only schematic. For example, the division of each unit is only a logical function division, and actual implementation can have another division manner. For example, a plurality of units or components can be combined or integrated into another system, or some features can be omitted or not executed.

[0122] The steps in the method embodiments of the present application can be adjusted, combined and deleted according to actual needs. The units in the apparatus embodiments of the present application can be combined, divided and deleted according to actual needs. In addition, each functional unit in each embodiment of the present application can be integrated in one processing unit, or each unit can exist physically, or two or more units can be integrated in one unit.

[0123] The integrated unit, if realized in the form of a software functional unit and sold or used as an independent product, can be stored in a storage medium. Based on such understanding, the technical solutions of the present application essentially or say the part that makes contributions to the prior art, or the whole or part of the technical solutions can be embodied in the form of a software product. The computer software product is stored in a storage medium, and includes a number of instructions to make a computer device (which can be a personal computer, a terminal or a network device, etc.) execute all or part of the steps of the method described in each embodiment of the present application.

[0124] The above merely provides the specific implementation of the present application, but the protection scope of the present application is not limited to this. Any person skilled in the art can easily think of various equivalent modifications or replacements within the technical range disclosed by the present application, and these modifications or replacements should be covered in the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A method for designing a dental crown, characterized in that, include: Obtain the pre-prepared tooth jaw model of the first user and the occlusal relationship data of the upper and lower jaws in the pre-prepared tooth jaw model, and generate a temporary crown design model corresponding to the pre-prepared tooth in the pre-prepared tooth jaw model; Obtain a reference crown model, which is a crown model obtained by scanning a reference crown. The reference crown is a crown that meets the crown wearing conditions after polishing a temporary crown. The temporary crown is a crown manufactured based on the temporary crown design model. Determine the positional relationship data between the reference crown model and the prepared tooth jaw model; The crown design data is determined based on the prepared tooth jaw model, the reference crown model, the positional relationship data, and the occlusal relationship data. The crown design data is either pre-designed crown data or data provided to a second user for formal crown design of the prepared tooth.

2. The method according to claim 1, characterized in that, The determination of the positional relationship data between the reference crown model and the prepared tooth jaw model includes: A crowned dentition model is obtained, and the crowned dentition model and the prepared dentition model are aligned to obtain first alignment data. The crowned dentition model is a dentition model obtained by scanning the oral cavity of the first user when the prepared tooth is fitted with a reference crown. The reference crown model and the crowned tooth model are aligned to obtain second alignment data; The positional relationship data is determined based on the first alignment data and the second alignment data.

3. The method according to claim 1, characterized in that, The process of determining crown design data based on the prepared tooth model, the reference crown model, the positional relationship data, and the occlusal relationship data includes: Based on the positional relationship data, the reference crown model is aligned to the prepared tooth jaw model to obtain the target model of the crowned tooth jaw; In the crowned dentition target model, the adjacency data between the reference crown model and the adjacent teeth of the prepared tooth, as well as the cervical margin fit data between the reference crown model and the prepared tooth, are calculated. The crown design data is determined based on the prepared tooth jaw model, the reference crown model, the positional relationship data, the occlusal relationship data, the adjacent data, and the cervical margin fitting data.

4. The method according to claim 1, characterized in that, Before obtaining the reference crown model, the method further includes: A crowned intermediate model of the jaw is obtained by scanning the oral cavity of the first user with an intermediate crown placed on the prepared tooth of the first user. The intermediate crown is the crown obtained by the second user during the process of polishing the temporary crown. Based on the crowned dentistry intermediate model, the intermediate crown is pre-calibrated. The pre-calibration includes one or more of the following: adjacent opening calibration, occlusal opening calibration, marginal fit calibration, and occlusal simulation calibration. The occlusal simulation calibration includes one or more of the following: static occlusal simulation calibration and dynamic occlusal simulation calibration. If all the preset verification results are passed, then the intermediate crown is determined to meet the crown wearing conditions, and the intermediate crown is used as the reference crown. If the verification result of the preset verification includes a verification failure, a prompt message will be issued or a corresponding modification plan will be generated.

5. The method according to claim 4, characterized in that, The adjacent circuit breaker verification is performed through the following steps: The distance between adjacent teeth between the intermediate crown and the adjacent teeth of the intermediate crown is determined based on the crowned dental intermediate model; If the distance between adjacent teeth is less than a preset threshold for the distance between adjacent teeth, a manual adjacency verification prompt is generated, which instructs the second user to perform a manual adjacency verification on the distance between adjacent teeth. If a manual adjacency verification pass message is received, the verification pass is determined as the verification result of the adjacency open circuit check. If the distance between adjacent teeth is greater than or equal to the preset threshold for the distance between adjacent teeth, or if a manual adjacency check fails, the failure is determined as the result of the adjacency check.

6. The method according to claim 4, characterized in that, The engagement check is performed using the following steps: The interdental distance between the intermediate crown and the opposing tooth is determined based on the crowned dental intermediate model. If the distance between the opposing teeth is less than a preset threshold for the distance between opposing teeth, then an oral texture image of the crowned dentition intermediate model is obtained, and the oral texture image includes a test strip bite imprint. The occlusal area of ​​the intermediate crown is determined by the bite imprint of the test strip; If the occlusal area is greater than or equal to a preset area threshold, then the verification will be passed and determined as the verification result of the occlusal gap check. If the distance between opposing teeth is greater than or equal to a preset threshold for the distance between opposing teeth, or if the occlusal area is less than the preset threshold for the area, then the verification will fail and be determined as the verification result of the occlusal gap verification.

7. The method according to claim 4, characterized in that, The edge fit verification is performed using the following steps: Based on the crowned dentistry intermediate model, determine whether the edge of the intermediate crown fits the cervical margin of the prepared tooth; If the fit is good, the verification result of the edge fit verification will be determined as passing the verification. If the fit is not perfect, the failure to fit the edge will be determined as the result of the edge fit verification.

8. The method according to claim 1, characterized in that, The process of generating the temporary crown design model corresponding to the prepared tooth in the prepared tooth jaw model includes: Obtain a standard tooth model with the tooth position number corresponding to the prepared tooth; The standard tooth model and the prepared tooth are registered to obtain a target tooth model that matches the prepared tooth. The temporary crown design model is generated based on the target tooth model and the prepared tooth.

9. The method according to claim 8, characterized in that, The step of generating the temporary crown design model based on the target tooth model and the prepared tooth includes: Based on the target tooth model and the prepared tooth, an initial crown model is generated; Based on the preset temporary crown design model and the prepared tooth jaw model, the initial crown model is adaptively adjusted to obtain the temporary crown design model.

10. The method according to claim 1, characterized in that, The determination of the positional relationship data between the reference crown model and the prepared tooth jaw model includes: Identify the inner surface of the reference crown model and the outer surface of the prepared tooth in the prepared tooth jaw model; The inner and outer surfaces are aligned to determine the positional relationship data between the reference crown model and the prepared tooth jaw model.

11. The method according to any one of claims 1 to 10, characterized in that, After determining the crown design data based on the prepared tooth jaw model, the reference crown model, the positional relationship data, and the occlusal relationship data, the method further includes: The crown design data is sent to the user terminal corresponding to the second user.

12. A method for designing a dental crown, characterized in that, include: Obtain the pre-prepared tooth jaw model of the first user and the occlusal relationship data of the upper and lower jaws in the pre-prepared tooth jaw model, and generate a temporary crown design model corresponding to the pre-prepared tooth in the pre-prepared tooth jaw model; Obtain a reference crown model, which is a crown model obtained by scanning a reference crown. The reference crown is a crown that meets the crown wearing conditions after polishing a temporary crown. The temporary crown is a crown manufactured based on the temporary crown design model. If the shape and edges of the reference crown model meet the preset reference crown shape design requirements, then the reference crown model is determined as crown design data. The crown design data is either pre-designed crown data or data provided to a second user for formal crown design of the prepared tooth.

13. The method according to claim 12, characterized in that, After obtaining the reference crown model, the method further includes: If the shape and / or edges of the reference crown model do not meet the preset reference crown shape design requirements, then determine the positional relationship data between the reference crown model and the prepared tooth jaw model; The crown design data is determined based on the prepared tooth jaw model, the reference crown model, the positional relationship data, and the occlusal relationship data.

14. A crown design device, characterized in that, include: The transceiver unit is used to acquire the pre-prepared jaw model of the first user and the occlusal relationship data of the upper and lower jaws in the pre-prepared jaw model. The processing unit is used to generate a temporary crown design model corresponding to the prepared tooth in the prepared tooth jaw model; The transceiver unit is also used to acquire a reference crown model, which is a crown model obtained by scanning a reference crown. The reference crown is a crown that meets the crown wearing conditions after polishing a temporary crown. The temporary crown is a crown manufactured based on the temporary crown design model. The processing unit is further configured to determine the positional relationship data between the reference crown model and the prepared tooth jaw model; and to determine crown design data based on the prepared tooth jaw model, the reference crown model, the positional relationship data, and the occlusal relationship data. The crown design data is either pre-designed crown data or data provided to a second user for formal crown design of the prepared tooth.

15. A crown design device, characterized in that, include: The transceiver unit is used to acquire the pre-prepared jaw model of the first user and the occlusal relationship data of the upper and lower jaws in the pre-prepared jaw model. The processing unit is used to generate a temporary crown design model corresponding to the prepared tooth in the prepared tooth jaw model; The transceiver unit is also used to acquire a reference crown model, which is a crown model obtained by scanning a reference crown. The reference crown is a crown that meets the crown wearing conditions after polishing a temporary crown. The temporary crown is a crown manufactured based on the temporary crown design model. The processing unit is further configured to determine the reference crown model as crown design data if the shape and edge of the reference crown model meet the preset reference crown shape design requirements. The crown design data is either pre-designed crown data or data provided to a second user for formal crown design of the prepared tooth.

16. A computer device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that, When the processor executes the computer program, it implements the crown design method as described in any one of claims 1-11 or 12-13.

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