KR102080245B1 - image data processing method for dental restoration - Google Patents

Abstract

In order to improve an accuracy of dental implant, the present invention comprises: a first step of obtaining a first scanning image for the outer surface of an implant target unit, a second scanning image for an antagonistic target unit, and a third scanning image for the implant target unit, to which a coupling bite is coupled, and the antagonistic target unit wherein the coupling bite corresponds to a vertical dimension having a predetermined interval between an inner surface unit coupling and corresponding to the implant target unit and an outer surface unit matching and corresponding to the antagonistic target unit, and acquiring a CT image for an oral cavity having the coupling bite coupled thereto and transmitting the same to a planning unit; a second step of generating an integrated scanning image considering the vertical dimension by being overlapped and swapped based on a common area with the third scanning image in order to arrange the first scanning image corresponding to the vertical dimension while the second scanning image is overlapped based on a common area with the third scanning image; and a third step of allowing the integrated scanning image and the CT image to be overlapped and matched based on a common area to generate a 3D planning image.

Description

Image data processing method for dental restoration

The present invention relates to an image data processing method for designing a dental restoration, and more particularly, to an image data processing method for designing a dental restoration in which the precision of the dental restoration is improved.

In general, dental restoration refers to an artificial periodontal tissue in the oral cavity which artificially restores appearance and function by replacing defective teeth.

In detail, when left in a state where natural teeth are lost, distortion of the teeth occurs in the adjacent teeth and the opposing teeth of the missing tooth, resulting in a deformation of the facial shape, and the chewing function is deteriorated, thereby increasing the inconvenience in everyday life. Moreover, when the loss state of natural teeth lasts for a long time, the alveolar bone surrounding the lost tooth is absorbed into the body, which makes it difficult to install artificial periodontal tissue.

At this time, the dental restoration is installed in the oral cavity to restore the chewing function and to prevent deformation or damage of the remaining arch of the target arch, which requires a antagonist or a dental restoration. Here, the tooth restoration may be provided as an artificial crown (crown) that is individually matched to the lost tooth, may be provided in the form of replacing a plurality of or the entire missing teeth of the target arch. The tooth restoration is made of titanium, etc., which has no rejection in the human body to replace the lost root, and is fixed to the oral cavity through an implant (fixture) that is placed in the alveolar bone.

Therefore, the dental restoration can be used stably because there is no secondary decay factor. In addition, since it has substantially the same structure as natural teeth, there is no pain and foreign body feel of the gums, there is an advantage that can be used semi-permanently if you manage well.

On the other hand, it is necessary to accurately and precisely oral information to design the dental restoration suited to the individual individual, and to install it in the correct position. To this end, internal tissue information such as surface information of the oral cavity and alveolar bone shape / bone density is required. Therefore, a 3D external shape image and a 3D image corresponding to the maxillary and mandible of the subject are required, and an image registration process of aligning and matching the vertical height is required.

In detail, the three-dimensional external shape image is obtained by collecting information scanned using an oral scanner along the mouth of the subject. However, in the process of collecting the scanned information, the three-dimensional external shape image appears to be distorted differently from the oral cavity. Therefore, a work of correcting the distorted orthodontic curvature in the 3D external shape image is required based on the 3D image obtained through CT imaging.

In addition, the soft tissue having a low density such as the gum portion is not substantially displayed on the 3D image. Therefore, the work of supplementing the surface information of the gum part based on the three-dimensional external shape image for the design of the dental restoration is required.

In this case, in order to prepare an implant suitable for the target arch of the subject and to set the height of the dental restoration, the three-dimensional image is preferably obtained by CT imaging in the upper and lower jaw occlusion with respect to the vertical height of the subject .

However, when at least one of the upper and lower jaw is a partial or full gingiva with most of the teeth lost, there is a problem in that the upper and lower jaw are difficult to be spaced apart in response to a vertical diameter suitable for the operator. Therefore, in order to align and match the three-dimensional external shape image and the three-dimensional image corresponding to the vertical height, a process of accurately calculating the vertical height is required.

Korean Patent Registration No. 10-0977911

In order to solve the above problems, the present invention is to provide an image data processing method for the design of the dental restoration to improve the precision of the dental restoration.

In order to solve the above problems, the present invention provides a first scanning image for the outer surface of the implantation target portion, a second scanning image for the antagonism target portion, an inner surface portion corresponding to the position of the implantation target portion, and an occlusal correspondence with the antagonist portion. A third scanning image of the implantation target portion and the antagonism target portion in which the coupling byte corresponding to the vertical height, the interval between which the outer surface portions are set, is acquired, and a CT image of the oral cavity in which the coupling byte is coupled is obtained. A first step of being transmitted to the planning unit; The second scanning image is overlapped with respect to the common part with the third scanning image, and overlaps with respect to the common part with the third scanning image so that the first scanning image is arranged in alignment with the vertical height. A second step of swapping to generate an integrated scanning image considering the vertical height; And a third step in which the integrated scanning image and the CT image are superimposed and matched based on a common part to generate a three-dimensional planning image, wherein the second step includes: an outer surface of the implantation target unit to which the coupling bytes are combined; The 3D surface information of the combined byte is re-acquired as a fourth compensation scanning image while the 3D surface information of the combined byte is erased in the fourth scanning image for the first scanning image, and the first scanning image is matched with the image units of the preset third comparison area. The third comparison region is swapped while being aligned and disposed in the third corresponding region when the matching ratio calculated by comparing the third corresponding region of the fourth corrected scanning image is greater than or equal to a preset value. Provides an image data processing method.

Here, in the second step, the matching ratio between the image units of each of the predetermined comparison areas of the first scanning image and the second scanning image and the corresponding area of the third scanning image is compared and calculated, wherein the matching rate is In the case of more than a preset value, it is preferable that each comparison area of the first scanning image and the second scanning image is aligned and disposed in the corresponding area of the third scanning image and swapped.

At this time, in the first step, a fourth scanning image of the outer surface of the implantation target portion to which the coupling bytes are coupled is obtained. In the second step, the first scanning image is a predetermined first image of the fourth scanning image. The first comparison area is aligned and disposed in the first corresponding area when the coincidence rate calculated by comparing the first units of the first comparison area with the first corresponding area of the third scanning image is greater than or equal to a preset value. The second comparison area is aligned with the second corresponding area when the matching ratio calculated by comparing the image units of the second preset comparison area of the scanning image with the second corresponding area of the fourth scanning image is greater than or equal to a preset value. And swapped while being disposed.

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In addition, in the first step, a plurality of matching markers are attached to the outer surface of the implantation target portion, and the match markers are displayed as images in each image data including an image of the implantation target portion, and the registration marker is attached. The fifth scanning image of the entire outer surface of the implantation target portion is obtained, and in the second step, the fourth correspondence of the image units of the fourth preset comparison area of the fifth scanning image and the first scanning image When the matching ratio calculated by comparing the areas is equal to or greater than a preset value, the fourth comparison area may be aligned and disposed in the fourth corresponding area so that the first scanning image is swapped with the fifth scanning image. Do.

On the other hand, in the first step, the first scanning image is filled with the curable resin in the mating groove and interlocked, and the gap with the implantation target part is corrected and relinered, and the curable resin is laminated on the outer surface side, so that the clam object It is preferable that the end side of the part is obtained by scanning the entire surface of the engaging bite corrected to be mated.

Through the above solution, the present invention provides the following effects.

First, a matching ratio between image units of preset comparison areas of each of the first scanning image and the second scanning image and a corresponding area of the third scanning image is calculated and compared, and is automatically generated when the matching ratio is equal to or larger than a preset setting value. The image processing process can be simplified and the processing time can be shortened by swapping to be aligned and overlapped with each other.

Second, even if the degree of conformity between the first scanning image and the third scanning image is low, the three-dimensional surface information on the side of the implantation target portion which is edentulous through the fourth scanning image including all of the common parts corresponding to each image is obtained. Swap to be aligned in the correct position corresponding to the vertical diameter can significantly improve the reliability of the final three-dimensional planning image.

Third, the comparison area and the corresponding area are more clearly calculated and compared based on the three-dimensional surface information of solid tissue such as antagonism, residual tooth, palate, etc. displayed on each scanning image, so that each scanning image can be superimposed precisely. Therefore, since the deformation of the image including the design information is substantially minimized, the accuracy can be significantly improved.

Fourth, the combined bite is provided as a ready-made standardized to a variety of sizes, the inner and outer surface profile and thickness is corrected to correspond closely to the mouth of each subject can guide the vertical diameter precisely, the correction of the combined bite and each image Since the acquisition of data can be performed simultaneously at the time of the patient's visit, the overall duration and cost of dental restoration can be significantly reduced.

1 is a flow chart illustrating an image data processing method for designing a dental restoration in accordance with one embodiment of the present invention.
Figure 2 is an exemplary view showing the alignment arrangement process of the scanning image in the image data processing method for the tooth restoration design according to an embodiment of the present invention.
3A and 3B are a front view and a plan view of a part of the coupling bite applied to the image data processing method for designing a dental restoration according to an embodiment of the present invention.
4 is an exemplary view illustrating a swapped state of a first scanning image in the image data processing method for designing a dental restoration according to an embodiment of the present invention.
5 is an exemplary view showing a three-dimensional planning image in the image data processing method for designing a dental restoration in accordance with an embodiment of the present invention.
6 is an exemplary view showing a modified example of the integrated scanning image in the image data processing method for designing a dental restoration according to an embodiment of the present invention.
7 is an exemplary view showing a modification of the three-dimensional planning image in the image data processing method for designing a dental restoration in accordance with an embodiment of the present invention.
8 is a cross-sectional view illustrating a process of correcting a combined bite applied to an image data processing method for designing a dental restoration according to an embodiment of the present invention.

Hereinafter, an image data processing method for designing a dental restoration according to a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

At this time, the present invention can be applied to partial or maxillary or edentulous which is difficult to calculate the vertical height (VD) due to the large amount of natural teeth loss of at least one of the maxilla and mandible.

In addition, in the present invention, the object to be implanted means a tooth that the dental restoration is substantially installed, and the object to be opposed is preferably understood to mean the tooth that is occluded with the object to be implanted. Hereinafter, the implantation target part includes an impression model prepared in correspondence with the maxillary or maxilla of the oral cavity, and the clamulation target part covers and describes an impression model prepared in correspondence with the mandible or mandible of the oral cavity. Of course, the present invention may include an impression model in which the implantation target portion is prepared in correspondence with the mandible or mandible of the oral cavity, and may include an impression model in which the opposing object portion is prepared in correspondence with the maxillary or maxillary of the oral cavity.

In addition, in the present invention, the dental restoration is preferably understood to encompass a partial / complete prosthesis in which an artificial crown and a plurality of artificial dental crowns are provided as one set integrally with each other. These dental restorations are secured to the oral cavity through tooth implants such as fixtures and abutments.

Here, the fixture and the abutment may be prepared as one of the ready-made products or manufactured separately, and the fixture and the abutment may be provided to have one body. In addition, the dental restoration is preferably designed according to the subject in consideration of the occlusal teeth and can be designed and manufactured based on standard orthodontic data stored in the planning unit in a standardized case.

In addition, in the present invention, the operator means a patient in need of dental restoration, and the operator side and the operator mean a dentist and a medical practitioner in whom dental restoration is performed. In addition, the manufacturer side and the manufacturer mean dental laboratories and dental laboratories that manufacture / supply dental restorations and tools for installing them.

1 is a flowchart illustrating an image data processing method for designing a dental restoration according to an embodiment of the present invention. And, Figure 2 is an exemplary view showing the alignment arrangement process of the scanning image in the image data processing method for the dental restoration design according to an embodiment of the present invention. 3A and 3B are a front view and a plan view of a part of the coupling bite applied to the image data processing method for designing a dental restoration according to an embodiment of the present invention. And, Figure 4 is an exemplary view showing a swapped state of the first scanning image in the image data processing method for designing a dental restoration in accordance with an embodiment of the present invention, Figure 5 is a dental restoration in accordance with an embodiment of the present invention It is an exemplary view showing a three-dimensional planning image in the image data processing method for design.

As shown in Figures 1 to 5, the image data processing method for the dental restoration design according to a preferred embodiment of the present invention is a scanning image and CT image acquisition (s10), integrated scanning image generation (s20), and three-dimensional planning A series of steps such as image generation (s30).

The image data processing method for designing such a dental restoration is preferably performed through an image data processing system including a planning unit.

In detail, each image data such as a scanning image and a CT image is obtained by using an imaging device such as an oral scanner or a computed tomography scanner, and transmitted to the planning unit. The 3D planing image, which is final image data, is generated through an image processing process in which the scanning image and the CT image are aligned, overlapped, swapped, corrected, or aligned through the planning unit. In addition, the design information of the dental restoration may be generated to precisely match the mouth of the subject based on the generated three-dimensional planning image.

Here, the planning unit includes a storage unit for storing each image data, and a processing unit for processing to generate the integrated scanning image, the three-dimensional planning image, and the design information of the dental restoration based on each image data. In addition, an input unit for inputting information and control commands to the processing unit, input information and control commands, and data generated through the processing unit such as each image data and three-dimensional planning image or design information of the dental restoration are outputted. The output unit is included.

In addition, the planning unit may further include a communication unit capable of receiving each image data or transmitting each image data or generated data to an external device. That is, each image data obtained using the imaging device is transmitted to the planning unit through the communication unit, and each image data or generated data is transmitted to the external device through the communication unit. In this case, it is preferable that the external device is understood as a manufacturing apparatus capable of manufacturing a real dental restoration based on the design information such as a three-dimensional printer or a milling machine.

On the other hand, referring to Figure 2, it is preferable that the plurality of scanning images are obtained, the first scanning image (m31) for the implantation target portion, the second scanning image (m32) for the cladding target portion and the combination It is preferable to include a third scanning image (m33) for the implantation target portion and the antagonist portion coupled to the bite.

Here, referring to FIGS. 3A to 3B, it is preferable to understand that the coupling bite 210 is a tool coupled to the insertion target part and the opposing object part so as to occlude corresponding to the vertical diameter. At this time, the present invention has been described and illustrated that the coupling bite 210 is a general purpose wax bite, but is not limited thereto, and may be provided with various known tools capable of guiding the vertical height of the subject. For example, bite checking tools such as trays, dentures, splints and wax rims may be provided as the combination bite.

In detail, the coupling bite 210 is coupled between the implantation target portion and the antagonistic target portion and is corrected in response to a vertical height in which a gap (thickness) between the inner and outer surface portions is set by the bite pressure. At this time, the predetermined vertical diameter is preferably understood as a vertical height that can be occupied by the operator in a suitable and comfortable state when occupying the upper and lower jaw.

Then, each image data is obtained in a state in which the combined byte, which has been corrected, is coupled between the implantation target portion and the opposing target portion. Through this, since each image data is aligned and combined in consideration of the vertical height of the subject, it can be used as accurate design information of the dental restoration.

The coupling bite 210 is formed such that an interval between the mating groove 211 in which the inner surface 211b mates with the implantation target portion and the outer surface portion 212 corresponding to the mating portion corresponds to the vertical diameter. In this case, the fitting groove portion 211 is the insertion target portion is inserted, it is preferable that the inner profile is substantially matched with the outer profile of the mounting target portion. In addition, the inner surface profile of the fitting groove 211 is preferably corrected corresponding to the outer surface profile of the fitting target part such that the fitting groove 211 and the outer surface of the fitting target part are closely joined.

Meanwhile, referring to FIGS. 2 and 4, the first scanning image m31 includes three-dimensional surface information v31 of the implantation target side exposed to the gum part and the palate. For example, in the fourth scanning image m31, three-dimensional surface information g34 of the gum part and the three-dimensional surface information p34 of the oral cavity continuously connected thereto are imaged and displayed.

In the second scanning image m32, three-dimensional surface information about the outer surface of the clam object is displayed as an image. In this case, when the antagonist remains in the antagonist, the antagonist three-dimensional surface information t32 is displayed as an image in the second scanning image m32. Alternatively, when the clam object side is edentulous, three-dimensional surface information of the gum part of the clam target side may be displayed as an image on the second scanning image m32. In addition, in the step of generating the three-dimensional planning image, the standardized dental data of the colliding target side pre-stored in the planning unit may be imaged and virtually arranged.

The third scanning image m33 includes three-dimensional surface information on an outer surface of the engagement portion of the engagement bite of the coupling bite, and a gum portion of the insertion target portion, and an occlusal portion of the engagement portion of the coupling bite. Displayed as an image. That is, the third scanning image m33 may display the 3D surface information v33 of the combined byte and the antagonistic 3D surface information t33 as an image.

In this case, the third scanning image (m33) is of the impression model of the implantation target portion and the opposing target portion, that is, the coupling bite coupled to the coupling bite, that is, the bite of the occlusal state in which the coupling bite is occluded by the oral cavity or the coupling bite. It is obtained by scanning the outer surface. Therefore, the third scanning image m33 displays three-dimensional surface information corresponding to the joining byte and the labyrinth outer surface and the partial outer surface of the buccal part as images.

The plurality of the scanning images are obtained by scanning the surface of the impression model corresponding to the oral cavity or the implantation target portion and the opposing target portion using an oral scanner. For example, when the operator visits the operator's side and the oral scanner is provided on the operator's side, the operator uses the imaging device to capture the patient's oral cavity to obtain a plurality of the scanning images. Alternatively, when the oral cavity scanner is not provided on the operator's side, the impression model may be manufactured and then transferred to the manufacturer's side, and the plurality of scanning images may be obtained by imaging the impression's model using a scanner provided at the manufacturer's side.

Here, the plurality of scanning images are stored in a pixel unit or vector data, the three-dimensional surface model is substantially hollow inside. In this case, when the implantation target portion and the opposing target portion are provided as an impression model, it is preferable to scan with a fixed three-dimensional scanner rather than a mobile scanner for scanning while moving the scanner to the outside of the scanning target surface to minimize distortion of the scanning image. . Through this, the distortion of the orthodontic curvature of the implantation target portion and the antagonistic target portion included in the scanning image may be minimized.

In addition, the CT image (m36 in FIG. 5) is preferably obtained by directly photographing the oral cavity using the combined bite combined to correspond to the vertical height. Through this, the CT image (m36 in FIG. 5) has a low density and alveolar bone three-dimensional data (a36 in FIG. 5) and the clam object on the side of the implantation target except for soft tissues such as lips, cheek mucosa, and gums through which radiation is transmitted. The antagonistic three-dimensional data and the like on the side are imaged and displayed. Hereinafter, the 3D surface information means 3D image information on the surface obtained through scanning, and the 3D data means 3D image information on internal tissues such as alveolar bone shape / density obtained through CT imaging. It is preferable to understand that. That is, the three-dimensional surface information may be displayed as a three-dimensional image with a hollow inside, and the three-dimensional data may be displayed as a three-dimensional image with a filled inside.

Here, the plurality of scanning images and the CT image (m36 of FIG. 5) are transmitted to the planning unit, and the 3D planning image (m50 of FIG. 5) is finally generated through a series of image processing.

On the other hand, the integrated scanning image is preferably generated including the following steps.

In detail, referring to FIG. 2, a matching ratio between image units of predetermined comparison areas of the first scanning image m31 and the second scanning image m32 and a corresponding area of the third scanning image m33 is determined. Calculate and compare. Here, the image unit is preferably understood to be divided into three-dimensional surface information by the minimum unit or a predetermined unit, it is preferable to include a pixel unit or a vector data unit.

 In this case, when the matching ratio is equal to or greater than a preset value, a comparison area of each of the first scanning image m31 and the second scanning image m21 is aligned and arranged in a corresponding area of the third scanning image m33. And swap. In this case, it is preferable that swap is understood that a predetermined image is replaced or replaced with another image or a modified image according to image processing.

The comparison area and the corresponding area may be the common part included in each of the scanning images in common.

For example, in the first scanning image m31 and the third scanning image m33, specific portions of the three-dimensional surface information v31 and v33 of the implantation target portion that are identically displayed on each image are selected as the common portion. It may be set as an overlap reference point. The second scanning image m32 and the third scanning image m33 are overlapped by selecting specific portions of the antagonist three-dimensional surface information t32 and t33 that are identically displayed on each image. It can be set as a reference point. These overlapping reference points may be set in plural places.

In detail, the comparison area and the corresponding area where a common part is selected and calculated from each three-dimensional surface information are compared with preset image units. For example, the match rate of the comparison area of the three-dimensional surface information and the corresponding area in the pixel unit or the vector data unit may be calculated and compared. In this case, when the matching ratio is equal to or greater than a preset value, the three-dimensional surface information including the comparison area and the corresponding area overlap.

That is, the first scanning image m31 overlaps with the implantation target side of the third scanning image m33, and the second scanning image m32 overlaps with the opposing target side of the third scanning image m33. do. In this case, the first scanning image m31 and the second scanning image m32 are aligned to correspond to the vertical diameter.

As a result, the first scanning image m31 overlaps the implantation target side of the third scanning image m33, and the first scanning image m31 is aligned with the second scanning image and the vertical height. Is placed. When the third scanning image m33 is erased, the integrated scanning image having the three-dimensional surface information v31 and the antagonist three-dimensional surface information t32 aligned with the vertical height may be aligned. M37 in FIG. 5 is generated. In this case, the erasing in the present invention is preferably understood to encompass the deletion of the selected image or data and the invisibility of the transparent image.

Meanwhile, referring to FIG. 5, portions commonly displayed on the integrated scanning image m37 and the CT image m36 are set as matching reference points, and overlap and match. Through this, three-dimensional surface information g31 of the gum part of the implantation target side displayed on the first scanning image m31, alveolar bone three-dimensional data a36 of the implantation target side, and the antagonist three-dimensional surface information t32 ) And the three-dimensional planning image m50 including three-dimensional data is generated. In this case, the antagonist three-dimensional data displayed on the CT image m36 may be matched to be substantially integrally overlapped with the antagonist three-dimensional surface information t32 displayed on the integrated scanning image m37.

In this case, the integrated scanning image m37 is obtained by arranging the first scanning image m31 and the second scanning image m32 based on the third scanning image m13. The CT image m36 is obtained by capturing the oral cavity in which the coupling byte is coupled. Accordingly, the three-dimensional surface information and the three-dimensional data displayed on the CT image m36 and the integrated scanning image m37 are aligned and matched corresponding to the substantially same vertical diameter VD. Accordingly, the first planning data with minimal error in matching the integrated scanning image m37 and the CT image m36 may be generated. Through this, the matching between each image data is easy and the matching process is simplified, and the accuracy and precision of the collected information can be significantly improved.

The height of the dental restoration is set based on the three-dimensional planning image m50 generated as described above. In addition, the design information (c50) of the dental restoration in which the mastication surface is set in consideration of the three-dimensional surface information or the standard dental data of the antagonist teeth is virtually disposed in the three-dimensional planning image (m50).

In addition, an implantation position and a direction h50 of the fixture are set through the alveolar bone three-dimensional data a36 of the implantation target side based on the CT image m36. In addition, a virtual fixture f50 capable of supporting the chewing pressure is virtually arranged in correspondence with the placement position and the direction h50, and an actual fixture corresponding to the virtual fixture f50 is prepared or manufactured. .

Meanwhile, a surgical guide for guiding the placement of the dental restoration may be designed based on the three-dimensional planning image m50. That is, the dental restoration and the surgical guide may be simultaneously designed and manufactured based on the three-dimensional planning image m50 generated according to the present invention. Through this, the number of visits to the dental practitioner can be minimized, and the base technology and the device capable of completing the implantation / installation of the dental restoration in a short time can be provided.

On the other hand, as shown in Figure 2 and 4, it is preferable that the fourth scanning image (m34) for the outer surface of the implantation target portion coupled to the coupling bite is obtained. In detail, the fourth scanning image m34 is obtained in a state in which the coupling bite is coupled to the implantation target part and the gum part is substantially covered. Therefore, it includes three-dimensional surface information (b34) of the combined bytes and three-dimensional surface information on the outer surface of the implantation target side exposed to the outside of the combined bytes. For example, the fourth scanning image m34 displays three-dimensional surface information b34 of the combined byte and three-dimensional surface information p34 of the palate.

In addition, the coupling bit is coupled in a state that the fitting groove portion is substantially bonded to the gum portion of the implantation target portion. Therefore, the 3D surface information position of the combined byte included in the fourth scanning image m34 and the 3D surface information b34 position of the combined byte included in the third scanning image m33 substantially correspond. do.

Image processing in which the fourth scanning image m34 overlaps with the third scanning image m33 on the basis of a common part, and the fourth scanning image m34 is swapped into the first scanning image m31. Through the process, the three-dimensional surface information g31 of the gum part of the implantation target side is aligned in correspondence with the opposing tooth three-dimensional surface information and the vertical diameter.

In detail, the matching ratio between the image units of the first first comparison area of the fourth scanning image m34 and the first corresponding area of the third scanning image m33 is compared and calculated. When the match rate is equal to or greater than a preset value, the first comparison area is aligned and arranged in the first corresponding area.

The first comparison area and the first corresponding area are preferably understood as three-dimensional surface information b34 of the combined byte included in each scanning image. That is, the three-dimensional surface information b34 of the combined byte included in the fourth scanning image m34 is set as the first comparison area and the three-dimensional information of the combined byte included in the third scanning image m33. Surface information is set to the first corresponding area. When the coincidence ratio between the first comparison region and the first correspondence region is equal to or greater than a preset value, the scanning images may be highly matched and overlapped with each other while being processed as a common part.

In this case, the first scanning image m31 may be overlapped based on a common firm structure with the fourth scanning image m34 arranged and aligned based on the third scanning image m33. Accordingly, the fourth scanning image m34 may be swapped with the first scanning image m31.

In detail, the matching ratio between the image units of the second preset comparison area of the first scanning image m31 and the second corresponding region of the fourth scanning image m34 is calculated. When the match ratio is equal to or greater than a preset value, the second comparison area is aligned and arranged in the second corresponding area.

Here, it is preferable that the second comparison area and the second corresponding area are understood as three-dimensional surface information of the palatal dog included in each scanning image. For example, when the implantation target portion is the maxilla, the three-dimensional surface information p31 of the palate contained in the first scanning image m31 is set as the second comparison region. The three-dimensional surface information m34 of the palate in the fourth scanning image m34 is set as the second corresponding area, and a matching ratio with the second comparison area is compared and calculated. When the calculated coincidence ratio is equal to or greater than a predetermined set value, each scanning image may be highly matched and overlapped with each other while being processed as a common part.

In detail, the 3D surface information (b34) of the coupling bite is included in the third scanning image (m33), wherein the implantation target side gum part is covered by the coupling bite and substantially includes only partial three-dimensional surface information of the labial side. The fourth scanning image m34 is first superimposed and arranged. In this case, the fourth scanning image m34 includes not only three-dimensional surface information b34 of the combined byte but also three-dimensional surface information p34 of the palate. Accordingly, the three-dimensional surface information g31 of the gum part of the implantation target side is set to be the three-dimensional surface of the antagonist through the image processing process in which the fourth scanning image m34 is replaced with the first scanning image m21. The information t32 may be aligned to correspond to the exact vertical height.

As such, the fourth scanning image m34 including all of the common parts corresponding to the first scanning image m31 and the third scanning image m34 is obtained and processed. In addition, by the combination between the three-dimensional surface information (b34) of the binding bite and the scanning image including the three-dimensional surface information of a solid tissue such as the three-dimensional surface information (p31, p34) of the oral cavity, Three-dimensional surface information can be arranged precisely.

Through this, since the matching ratio between each scanning image is remarkably improved, the accuracy and precision of the image information can be remarkably improved. In addition, since the three-dimensional surface information can be automatically superimposed when the calculated coincidence ratio is equal to or greater than a predetermined set value, the convenience of work can be significantly improved during image processing.

Furthermore, in the fourth scanning image m34, the 3D surface information b34 of the combined byte may be set and erased as an erase area and reacquired as the fourth corrected scanning image m34r. Accordingly, the fourth correction scanning image m34r includes three-dimensional surface information p34 of the oral dog. In this case, it is preferable that the three-dimensional surface information b34 of the combined byte indicated by a dotted line indicates a state of being set and erased as an erase area.

In addition, the first scanning image m31 compares image units of a predetermined third comparison region with a third corresponding region of the fourth corrected scanning image m34r to calculate a match rate. In this case, when the calculated coincidence ratio is equal to or greater than a preset value, the fourth compensating scanning image m34r is swapped into the first scanning image m31 while the third comparison region is aligned and disposed in the third corresponding region. Here, the third comparison region and the third corresponding region are preferably understood as the three-dimensional surface information (p31, p34) of the palate in each scanning image.

In this case, as the three-dimensional surface information b34 of the combined byte is erased from the fourth scanning image m34, the time required for comparison and calculation with the first scanning image m31 may be significantly shortened. In addition, since the fourth scanning image m34 and the first scanning image m31 are substantially compared, unnecessary information is removed, and thus the matching ratio between the scanning images may be significantly improved.

On the other hand, Figure 6 is an exemplary view showing a modified example of the integrated scanning image in the image data processing method for the dental restoration design according to an embodiment of the present invention. And, Figure 7 is an exemplary view showing a modification of the three-dimensional planning image in the image data processing method for the dental restoration design according to an embodiment of the present invention. In this modified example, since the basic configuration except for the fifth scanning image and the matching marker is the same as the above-described embodiment, detailed description of the same configuration will be omitted.

As shown in FIG. 6, in acquiring each image data, a plurality of matching markers may be attached to an outer surface of the implantation target portion. Such a registration marker may be attached to the implantation target in the case where the remaining tooth is substantially dentifiable without the remaining / restorative teeth, or the remaining restorative teeth are a metallic material.

In addition, a fifth scanning image m35 of the entire outer surface of the implantation target portion to which the registration marker is attached may be further obtained. That is, the fifth scanning image m35 includes three-dimensional surface information g35 of the gum part of the implantation target side, three-dimensional surface information p35 of the oral dog, and three-dimensional surface information m40 of the registration marker. desirable. Furthermore, at least the fifth scanning image m35 and the CT image m36 are preferably obtained after the registration marker is attached to the implantation target side. In this case, the registration marker is provided with a radiopaque material so that the image information on the combined bite is not substantially displayed on the CT image, but the combined bite is provided with a radiopaque material.

Accordingly, the three-dimensional surface information m40 and the three-dimensional data of the registration marker are displayed at substantially the same position in each image data including the three-dimensional surface information and the three-dimensional data on the side of the implantation target portion. The integrated scanning image m37 and the CT image m36 are precisely corresponding to the vertical height VD by overlapping the three-dimensional surface information m40 and the three-dimensional data of the registration marker with a common part. Can be matched.

In this case, the first scanning image m31 is swapped so that the first scanning image m31 is aligned with the placement target side of the third scanning image through the above-described image processing, and the fifth scanning image m35 is the first scanning image m31. ) Can be overlapped and swapped based on a common part.

In detail, a matching ratio may be calculated by comparing image units of a fourth preset comparison area of the fifth scanning image m35 with a fourth corresponding region of the first scanning image. In this case, when the calculated coincidence ratio is equal to or greater than a preset value, the fourth comparison area may be aligned and disposed in the fourth corresponding area so that the first scanning image m31 may be swapped with the fifth scanning image m35. .

The fourth comparison area and the fourth corresponding area may be set as three-dimensional surface information p31 and p35 of the palate. Alternatively, partially erasing three-dimensional surface information of the portion similar to the position of the three-dimensional surface information (m40) of the registration marker displayed on the fifth scanning image (m35) in the first scanning image (m31) (part indicated by k31). The edge side may be set as the fourth comparison region and the fourth corresponding region.

In addition, the CT image m36 may be obtained by photographing an oral cavity in which the coupling bite is installed and occluded between the placement target portion and the placement target portion to which the registration marker is attached. Such registration markers are preferably attached to the outer surface of the implantation target part spaced three or more places.

Therefore, the registration marker is imaged and displayed on the CT image m36 to the outside of the alveolar bone three-dimensional data a36. In this case, since the integrated scanning image m36 is generated by being swapped so that the first scanning image m31 is replaced with the fifth scanning image m35, the three-dimensional surface information m40 of the registration marker is displayed. Therefore, when the integrated scanning image m37 and the CT image m36 are matched, the 3D surface information and the 3D data of the matching marker displayed on each image data are set as a common part. The degree can be significantly improved.

Through such image processing, information lacking in each image data can be complemented / corrected. That is, the three-dimensional surface information g35 of the gum part of the implantation target portion that is not displayed on the CT image m36 may be supplemented from the integrated scanning image m37. In addition, even if distortion of the dental curvature occurs during the scan through the oral scanner, it may be corrected based on the accurate dental curvature of the CT image (m36). Through this, the 3D planning image m50 that is highly precise and matched may be generated.

On the other hand, the coupling bite is provided so that the distance between the matching groove portion and the outer surface side corresponding to the vertical diameter. At this time, the spacing between the matching groove portion and the outer surface side is preferably corrected to correspond to each subject. For example, the combined bite may be adjusted by vertical expression according to the direct chewing sensitivity of the subject, and may be determined by measuring electrical / chemical signals of the jaw joint and the jaw muscle.

That is, the combined bite may be corrected to correspond to the vertical diameter as the subject actually engages the upper and lower jaw in the state where the combined bite is inserted into the oral cavity. Alternatively, when the implantation target portion and the antagonist portion are provided as the impression model, the coupling bite may be disposed between the impression model connected to the upper and lower jaw side through the articulator. As the impression model is occluded to correspond to the vertical height calculated statistically using the articulator, the coupling byte may be corrected to correspond to the vertical height.

In addition, the plurality of scanning images and the CT images m36 obtained with the combined bytes corrected as described above may include three-dimensional surface information and three-dimensional data in a state where the vertical height VD is considered. Can be.

At this time, the curable resin is filled in the joining groove of the coupling bite and bonded to the implantation target part. In this case, the curable resin may be provided with a material that has a weaker strength than the tissue on the side of the implantation target and is hardened by the external force after hardening. For example, the curable resin may be provided with at least one of alginate, putty or dental resin.

Then, the curable resin is coated to a predetermined thickness on the outer surface portion side of the bonding bite and bonded to the clamulation target portion. In this case, the curable resin may be provided with the same material as the resin filled in the mold groove, the wax rim may be laminated in some cases.

As a result, the joining groove of the coupling bite is relieved by correcting a gap with the implantation target part. In addition, by correcting such that the end side of the cladding target portion is engaged with the outer surface portion side of the coupling bite, the coupling bite can be accurately guided to correspond to the vertical diameter.

Furthermore, since the matching groove is re-lined and corrected with an inner profile that is highly matched with the outer profile of the implantation target portion, the precision of the dental restoration designed based on this can be significantly improved.

8 is a cross-sectional view illustrating a process of correcting a combined bite applied to an image data processing method for designing a dental restoration according to an embodiment of the present invention.

As shown in FIG. 8, the coupling bite 210 may be provided as a general-purpose wax bite 210 formed to be standardized to correspond to a predetermined standard arch form profile da. In the following description, it is preferable that the combination bite 210 and the general purpose wax bite 210 mean the same tool, and therefore, the same parts are shown and described with the same numbers.

In detail, the general purpose wax bite 210 is occluded between the implantation target portion 2 and the antagonism target portion 3, and the pressure protrusion 212 corresponding to the antagonism target portion 3 is provided on the outer surface side. Preferably provided. In addition, the molding groove 211 is recessed to a predetermined depth on an inner surface side of the general purpose wax bite 210 and is formed in an arc shape (see FIG. 3B) as a whole.

This arcuate shape preferably corresponds to the standard arch form profile (da in FIG. 3B). Here, the standard dental arch profile (da in FIG. 3b) is a predetermined response corresponding to the gap between the outer and inner sides of the gum part g that surrounds the alveolar bone, which is a portion where the tooth is actually arranged in the implantation target part 2. It is preferable to understand it as the area | region surface which has an area. At this time, the outer side of the gum part (g) is a portion corresponding to the labial and buccal (buccal), the inner side of the gum part (g) is preferably understood to be a portion corresponding to the lingual (lingual).

This standard arch arch profile (da in FIG. 3b) may be standardized and calculated in consideration of age and gender anatomical deviations.

In detail, the standard arch arch profile (da of FIG. 3B) may be calculated by being divided into stages in correspondence to an average value representing age and sex archery size. Through this, the general purpose wax bite 210 may be divided and mass produced to have a predetermined size. For example, the general purpose wax bite 210 may be provided as a set of ready-made products that are divided into six types of upper, middle and small, and the lower and lower, middle and small.

That is, if the vertical diameter (VD) is guided using the general purpose wax bite 210, the time required to calculate the vertical diameter (VD) when designing the dental restoration is shortened and the overall cost is reduced and economical.

Furthermore, the general purpose wax bite 210 is prepared as a ready-made product, and is standardized and mass-produced in a plurality of sizes so as to be universally applied to the mouths of various subjects or the corresponding impression models. Therefore, since the general purpose wax bite 210 is provided in advance by the size at the operator's side, it can be used immediately at the visit of the operator, and thus the usability can be remarkably improved. In addition, the number of visits of the subject may be substantially reduced to one time in the preparation step of acquiring information about the implantation target portion and the opposing target portion before designing the dental restoration.

In addition, a plurality of the scanning images and the CT images may be acquired immediately after the general purpose wax bite 210 is corrected to be suitable for each subject. Here, since the plurality of scanning images and the time point at which the CT images are acquired are substantially the same, the matching degree of each image data may be significantly improved.

At this time, the general purpose wax bite 210 is a solid at room temperature, and has a predetermined support strength, and softens during the heating process to a predetermined temperature or more to correspond to the implantation target portion 2 and the clamulation target portion 3. It can be formed from paraffin wax, which can be calibrated. At this time, it is preferable that the portions indicated by w1 and w2 in FIG. 9 are warmed and softened.

The paraffin wax has a physical property of softening even if the melting point does not apply high temperature heat in the range of 47 ~ 64 ℃. Therefore, it is safe even if directly applied to the oral cavity in a heated state, and can be cured quickly at a temperature lower than a predetermined temperature so that the degree of conformity between the implantation target portion 2 and the clamulation target portion 3 can be maintained. Furthermore, since the paraffin wax has a low shrinkage rate in the process of softening and hardening, the degree of conformity between the implantation target portion and the opposing target portion and the accuracy of the calculated vertical diameter may be remarkably improved.

Here, the paraffin wax preferably contains 70 to 85% by weight of paraffin (for example, ceresin) and the other weight% of other additives based on the total weight. For example, the paraffin wax may include 77 to 85% by weight of ceresin, 7 to 13% by weight of beeswax, 1.5 to 3% by weight of canaoba, 2 to 4% by weight of resin, and 1.5 to 3% by weight of microcrystalline wax.

In detail, the general purpose wax bite 210 is immersed and softened in a water tank containing hot water in the range of 45 to 55 ° C. Then, after the inner surface portion of the general purpose wax bite 210 is installed to correspond to the implantation target portion, the occlusal pressure is applied, and the gap between the inner and outer surface portions may be corrected to correspond to the vertical height VD of the subject. At the same time, the inner surface of the matching groove 211 is corrected to match the outer profile of the implantation target portion 2, and the outer surface portion 212 is corrected to occlusion so as to correspond to the end of the cladding target portion (3) do.

In this case, the inner surface portion of the general purpose wax bite 210, that is, the fitting groove 211 may be attached in a state in which the curable resin r1 is filled so as to be closely bonded to the implantation target portion 2. The vertical diameter and the installation position of the universal wax bite may be accurately set by stacking an occlusal acquisition material such as curable resin (r2) on the outer surface portion 212 side of the general purpose wax bite.

In addition, in the case of a partial dentition where residual teeth exist on the implantation target side, an interdental guide unit for guiding the incision position so that the general wax bite is corrected according to the residual tooth region on the implantation target side (212b in FIG. 3B). Can be formed.

In detail, the pressure protrusion 212 is integrally formed with the matching groove 211, and is formed in an arc shape corresponding to a predetermined standard arch arch profile (da of FIG. 3B). In this case, the pressure protrusion 212 may be formed to have an outer surface corresponding to the outer shape of the tooth. That is, the pressure protrusion 212 may be formed with a chewing surface and interdental guide portion 212b corresponding to the actual tooth shape.

In this case, the interdental guide portion 212b may be displayed in an intaglio, and the alignment is used as an alignment standard when the general purpose wax bite 210 is installed between the placement target portion 2 and the clamulation target portion 3. It can be used as a marker. For example, the general purpose wax bite 210 may be precisely arranged in correspondence with the midline by a simple method of aligning the interdental guide part 212b with the interdental of the antagonist or the upper lip / lower lip.

In addition, the position of the remaining tooth on the insertion target portion 2 side and the interdental guide portion 212b may be removed by cutting the residual tooth area of the general purpose wax bite 210 by comparing it. Therefore, even if the general purpose wax bite 210 is integrally formed corresponding to the standard dental arch profile (da of FIG. 3B), it can be easily cut and corrected according to the intraoral environment. Furthermore, since the general purpose wax bite 210 is made of a paraffin wax material having a strength that can be cut by a tool such as a knife, the ease of operation can be significantly improved during cutting correction.

Through this, the present invention calculates the coincidence rate between the image units of the predetermined comparison area of each of the first scanning image m31 and the second scanning image m32 and the corresponding area of the third scanning image m33. In comparison, when the matching ratio is greater than or equal to a preset value, the image is swapped to be automatically aligned and overlapped, thereby simplifying the image processing process and significantly reducing the processing period.

Here, even if the matching degree between the first scanning image m31 and the third scanning image m33 is low, the swap is overlapped through the fourth scanning image m34 including all common parts corresponding to each image. do. Therefore, since the three-dimensional surface information on the implantation target side that is edentulous is aligned at the correct position corresponding to the vertical diameter, the reliability of the finally generated three-dimensional planning image can be significantly improved.

At this time, the comparison area and the corresponding area are more clearly calculated and compared based on the three-dimensional surface information on the solid tissue such as the antagonist, the remaining tooth palate, and the like displayed on each scanning image. Therefore, each scanning image can be superimposed precisely, and since the deformation of the image including the design information is substantially minimized, the accuracy can be significantly improved.

In addition, the coupling bite is provided as a ready-made standardized in a variety of sizes, the inner and outer surface profile and thickness is corrected to correspond closely to the mouth of each subject can guide the vertical diameter precisely. In addition, since the correction of the combined bite and the acquisition of each image data can be performed at the same time of the patient's visit, the overall duration and cost of dental restoration can be significantly reduced.

In this case, the terms "comprise", "comprise", "comprise" or "have" described above mean that the corresponding component may be included unless otherwise stated, and thus, other It should be construed that it may include other components rather than to exclude the components. All terms, including technical and scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art unless otherwise defined. Terms commonly used, such as terms defined in a dictionary, should be interpreted to coincide with the contextual meaning of the related art, and shall not be interpreted in an ideal or excessively formal sense unless explicitly defined in the present invention.

As described above, the present invention is not limited to the above-described embodiments, but may be modified and implemented by those skilled in the art without departing from the scope of the claims of the present invention. Such variations are within the scope of the present invention.

m31: first scanning image m32: second scanning image
m33: third scanning image m34: fourth scanning image
m34r: 4th scanning image m35: 5th scanning image
m36: CT image m37: integrated scanning image
m50: three-dimensional planning image 210: combined bytes

Claims (6)

The first scanning image of the outer surface of the object to be implanted, the second scanning image of the object to be clad, the interval between the inner surface portion corresponding to the object to be implanted and the object portion corresponding to the object to be placed, and a predetermined vertical height A first step of acquiring a third scanning image of the implantation target portion and the antagonism target portion to which the corresponding coupling byte is coupled, and obtaining a CT image of the oral cavity to which the coupling byte is coupled to the planning unit;
The second scanning image is overlapped with respect to the common part with the third scanning image, and the first scanning image is overlapped with respect to the common part with the third scanning image such that the first scanning image is aligned and disposed corresponding to the vertical height. A second step of swapping to generate an integrated scanning image considering the vertical height; And
Comprising a third step of generating a three-dimensional planning image by overlapping and matching the integrated scanning image and the CT image based on a common part,
In the second step, the 3D surface information of the combined byte is set and erased as an erased area from the fourth scanning image of the outer surface of the implantation target to which the combined bytes are combined, and is reacquired as the fourth corrected scanning image.
The third scanning area is the third comparison area when the matching ratio calculated by comparing the image units of the preset third comparison area with the third corresponding area of the fourth calibration scanning image is greater than or equal to a preset value. Image data processing method for designing a dental restoration, characterized in that the swap is aligned and disposed in the corresponding area. The method of claim 1,
In the second step, the matching ratio between the image units of each of the predetermined comparison areas of the first scanning image and the second scanning image and the corresponding area of the third scanning image is compared and calculated.
The comparison region of the first scanning image and the second scanning image are aligned, disposed in the corresponding region of the third scanning image, and swapped when the matching ratio is equal to or greater than a preset value. Data processing method. The method of claim 1,
In the first step, a fourth scanning image of the outer surface of the implantation target portion to which the coupling byte is coupled is obtained,
In the second step, the first scanning image is equal to or larger than a preset value, wherein a matching rate calculated by comparing image units of a first comparison area of the fourth scanning image with a first corresponding area of the third scanning image is compared. In this case, the first comparison area is arranged and arranged in the first corresponding area, and the image units of the second comparison area of the first scanning image and the second corresponding area of the fourth scanning image are calculated and compared. And the second comparison area is swapped while being aligned and disposed in the second corresponding area when the coincidence ratio is greater than or equal to a predetermined set value. delete The method of claim 1,
In the first step, a plurality of matching markers are attached to the outer surface of the implantation target portion, and the match markers are displayed as images in each image data including an image of the implantation target portion, wherein the match marker is attached. A fifth scanning image of the entire outer surface of the object to be implanted is further obtained.
In the second step, the fourth comparison when the matching ratio calculated by comparing the image units of the fourth preset comparison region of the fifth scanning image with the fourth corresponding region of the first scanning image is greater than or equal to a predetermined preset value. And aligning and arranging an area in the fourth corresponding area so that the first scanning image is swapped with the fifth scanning image. The method of claim 1,
In the first step, the first scanning image is
Filling and interlocking of the curable resin in the inner surface portion, the gap with the implantation target portion is corrected and relining, and the curable resin is laminated on the outer surface portion side, so that the end side of the cladding object portion is corrected so that the entire engagement bite Image data processing method for designing a dental restoration, characterized in that obtained by scanning the surface.

Images