KR20220134712A - manufacturing method for digital overdenture - Google Patents

Abstract

In order to improve manufacturing convenience and precision, a manufacturing method of a digital overdenture is provided. The manufacturing method of a digital overdenture comprises: a first step having placement information of a fixture spaced apart on both sides in an anterior region of the alveolar bone to be aligned and set in a pair in a planning image generated so that surface information and alveolar bone information of the restoration target dental arch and the opposing dental are displayed as a three-dimensional image aligned in correspondence with the preset vertical height; a second step having the fixture spaced apart on both sides of the anterior tooth of the restoration target dental arch and placed as a pair in response to the placement information and having a holder device fixed to the fixture, and preparing a temporary denture corrected to form a temporary holder insertion portion and a close-corresponding portion matched with an outer surface of a molar side of the restoration target dental arch and the holder device on an inner surface portion; a third step of scanning and acquiring the corrected temporary denture and acquiring a correction scanning image swapped to expose each three-dimensional surface information of the temporary holder insertion portion and the close-corresponding portion to the outside; and a fourth step of manufacturing a digital overdenture in which the inner surface portion is formed based on the corrected scanning image and a through hole is formed so that a clip detachably fastened to the holder device is fixed through a curable resin. Accordingly, speed and convenience of operation can be remarkably improved.

Description

Digital overdenture manufacturing method {manufacturing method for digital overdenture}

The present invention relates to a digital overdenture manufacturing method, and more particularly, to a digital overdenture manufacturing method having improved manufacturing convenience and precision.

In general, dentures or prostheses are artificial periodontal tissues in the oral cavity that replace missing natural teeth and artificially restore appearance and function. At this time, the dentures or prostheses can be installed inside the oral cavity to restore the masticatory function and prevent periodontal tissue deformation, and can be divided into partial/complete dentures and partial/complete prostheses according to the number of missing teeth.

On the other hand, the denture has a problem of causing a feeling of foreign body and pain because a dental adhesive is applied to the inner mold groove and is installed by being attached to the surface of the gum, and direct occlusal pressure is applied to the gum. On the other hand, since the prosthesis is fixed to a fixture to be placed in the alveolar bone, foreign body sensation and pain in the gums due to occlusal pressure are reduced, but the prosthesis is substantially permanently fixed, making it difficult to manage. Accordingly, an overdenture that compensates for the shortcomings of the denture and the prosthesis has been disclosed.

In detail, while the overdenture is fixed to a fixture to be placed in the alveolar bone like the prosthesis, it is detachable from the oral cavity like the denture, so it is easy to manage such as cleaning. At this time, the overdenture includes a coupling means selectively coupled to the abutment fixed to the fixture.

In this case, the conventional coupling means is provided in a ball type that is individually matched to the fixture/abutment that is implanted and fixed to the alveolar bone in plurality, or is provided in a bar type passing through a plurality of fixtures/abutments.

Here, since the ball-type coupling means is individually coupled to each fixture/abutment, the positional precision of the attachment is required. For this reason, if any one of the coupling means is not formed at the correct position, there is a problem that the overdenture cannot be installed accurately.

In addition, an insertion groove is formed in the bar-type coupling means so that the fixing bars passing through the plurality of fixtures/abutments are inserted in a round manner, and the coupling is easier than the ball-type coupling means. At this time, since the fixing bar is provided with a rigid metal material, the implantation heights in the alveolar bone of the plurality of fixtures/abutments through which the fixing bar passes must match each other. However, in the case of a state in which the natural teeth have already been lost or the extracted alveolar bone has a problem in that it is difficult to accurately fix the bar-type coupling means due to the bending of its outer surface.

In addition, in the prior art, the design of the overdenture and the coupling means is established based on the impression body and CT image obtained in response to the oral cavity. At this time, in the case of a CT image, it is easy to obtain information on the alveolar bone, but it is difficult to obtain information on the gum, which is a soft tissue. In addition, in the case of an impression body, excessive time is required in the process of taking an impression and manufacturing a model, and there is a problem in that it is difficult to obtain precise oral information as the gums are pressed during the impression taking. Due to this, the manufactured overdenture could not be accurately installed in the oral cavity, and thus there was a problem in that a feeling of foreign body and pain were aggravated during use.

Moreover, since it depends on the operator's experience when performing a series of steps such as fixture placement, abutment, and fixing of the coupling means, the precision of the operation is lowered, and the manufacturing process of the overdenture is excessively increased, which increases the discomfort of the patient. There was a problem being

Korean Patent Registration No. 10-1694475

In order to solve the above problems, an object of the present invention is to provide a digital overdenture manufacturing method in which manufacturing convenience and precision are improved.

In order to solve the above problems, the present invention provides the implantation information of the fixture in the planning image generated so that the surface information and the alveolar bone information of the restoration target arch and the opposing arch are displayed as a three-dimensional image aligned corresponding to a preset vertical height. A first step of being spaced apart on both sides in the anterior region of the alveolar bone to be aligned as a pair; The fixture is placed in a pair spaced apart on both sides on the anterior side of the restoration target arch in response to the implantation information, and a holder device is fixed to the fixture, the holder device and the posterior side of the restoration target arch A second step of preparing the corrected temporary dentures to form a temporary holder insertion portion and a close-fitting portion to be matched with the outer surface; a third step of obtaining a corrected scanning image obtained by scanning the corrected temporary dentures and swapped so that each of the three-dimensional surface information of the temporary holder insertion unit and the close contact unit is exposed to the outside; and a fourth step of manufacturing a digital overdenture in which an inner part is formed based on the corrected scanning image and a through hole is formed so that a clip detachably fastened to the holder device is fixed through a curable resin. to provide.

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

First, since the holder device is composed of a fixing bar formed with a minimum length into which the clip provided in the digital overdenture can be fitted and a pair of abutments supporting both ends, the installation of the fixture to which the holder abutment is fastened Since the number is minimized to only two, the speed of the procedure and the convenience of the procedure can be remarkably improved by simplifying the fixture placement.

Second, since the fixing bar is supported through a pair of holder abutments, it is required due to complex procedures such as alveolar bone cutting and multiple alignment processes for fixing a plurality of abutments at a constant height/position/direction along the dental arch in the prior art. As the cost is reduced, dental restorations can be provided at an affordable price, thereby securing market competitiveness.

Third, based on the scanning image of the temporary denture precisely corrected for the oral cavity, the design information of the mold seating groove part that can be tightly fitted and fixed to the posterior surface of the gum as well as the holder insertion part into which the holder device is inserted is accurately obtained. Accordingly, problems in which the overdenture installed in the oral cavity flows, floats, and detaches during mastication can be prevented in advance.

1 is a flowchart for a digital overdenture manufacturing method according to an embodiment of the present invention.
Figure 2 is an exemplary view showing a planning image in the digital overdenture manufacturing method according to an embodiment of the present invention.
Figure 3 is an exemplary view showing a state in which the holder device according to an embodiment of the present invention is fixed to the anterior side.
4 is an exploded perspective view of a holder device applied to an embodiment of the present invention;
5 is a perspective view of a jig device applied to an embodiment of the present invention.
6 is an exemplary view illustrating a process in which the holder abutment is aligned and fixed to the anterior side in the digital overdenture manufacturing method according to an embodiment of the present invention.
7a and 7b are exemplary views showing the correction process of the temporary denture in the digital overdenture manufacturing method according to an embodiment of the present invention.
8 is an exemplary view showing a process of acquiring design information in a digital overdenture manufacturing method according to an embodiment of the present invention.
9 is an exemplary view showing the inner side of the digital overdenture manufactured according to an embodiment of the present invention.
Figure 10 is a cross-sectional view showing the fixing process of the clip in the digital overdenture manufacturing method according to an embodiment of the present invention.

Hereinafter, a digital overdenture manufacturing method according to a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

1 is a flowchart of a digital overdenture manufacturing method according to an embodiment of the present invention, and FIG. 2 is an exemplary view showing a planning image in the digital overdenture manufacturing method according to an embodiment of the present invention.

1 to 2, the digital overdenture manufacturing method according to the present invention generates a planning image and sets implantation information (s11), fixing the holder device and correcting temporary dentures (s12), and obtaining a corrected scanning image of the temporary denture. (s13), and a series of steps such as digital overdenture final fabrication (s14).

On the other hand, the restoration target arch to be described below is preferably understood as a jaw that requires dental restoration through the digital overdenture, and the opposing jaw is preferably understood as a jaw that occludes the restoration target arch. In this case, in the present invention, it is described and illustrated that the restoration target arch is the mandible as an edentulous jaw, and the opposing arch is the maxilla as the dentulous jaw. Of course, in some cases, the present invention can be equally applied to the manufacturing process of the digital overdenture installed when the maxilla or the maxilla are both edentulous.

In addition, it is preferable to understand that the temporary denture is a denture manufactured primarily to obtain precise design information on the final manufactured digital overdenture, and the digital overdenture is actually an artificial periodontal tissue for use by being installed in the oral cavity. At this time, since the temporary denture provides design information for manufacturing the digital overdenture and can be used temporarily by the patient during the manufacturing period of the digital overdenture, usability and convenience in the dental restoration process can be significantly improved. have.

This digital overdenture manufacturing method may be performed through a digital overdenture manufacturing system including an imaging device, a planning unit, and a manufacturing device.

At this time, the imaging device is to acquire three-dimensional surface information (m2, m3) and alveolar bone information (A) for the restoration target arch and the opposing arch, and it is understood as a concept encompassing an oral scanner and a CT imaging device. desirable. In detail, surface information about the outer surface of the gum part of the restoration target arch and the opposing arch is acquired as a three-dimensional image by using the oral scanner. Then, the alveolar bone information (A) capable of confirming the shape of the alveolar bone, the curvature, and the position of the inferior alveolar nerve is obtained using the CT imaging device.

In addition, it is preferable that the planning unit be understood as a computer device that collects, calculates, and models information transmitted from an external device through wired/wireless communication and information pre-stored in the planning unit. That is, the three-dimensional surface information (m2, m3) and the alveolar bone information (A) of the restoration target arch and the opposing arch obtained through the imaging device are loaded into the planning unit and displayed as a three-dimensional image. In addition, the three-dimensional surface information (m2, m3) and the alveolar bone information (A) of the restoration target arch and the opposing arch are aligned to correspond to a preset vertical height (VD), and a planning image for designing the overdenture ( M) can be created.

At this time, in the planning image (M), it is preferable that the implantation information (B) of the fixture is spaced apart on both sides in the anterior region of the alveolar bone and aligned as a pair. As such, when the implantation information (B) is arranged locally on the anterior side, the complicated and precise drilling and implantation process is not required to install the fixture obliquely to the alveolar bone on the posterior side. The treatment period can be significantly shortened.

It is preferable to understand that the manufacturing device is any one of a 3D printer, a mold device, or a milling machine that manufactures a real digital overdenture according to the design information of the digital overdenture, and in the following, it is exemplified that the manufacturing device is a 3D printer explained as The 3D printer is preferably provided as a digital light processing (DLP) type stereolithography printer that cures a cross section patterned with light energy of a lamp or LED. Through this, the product to be 3D printed can be precisely output with the minimum error with the design information set based on the planning image M. Accordingly, the operation of additionally correcting the output product may be substantially omitted, and thus manufacturing convenience and speed may be remarkably improved.

3 is an exemplary view illustrating a state in which the holder device according to an embodiment of the present invention is fixed to the anterior side, and FIG. 4 is an exploded perspective view of the holder device applied to an embodiment of the present invention. And, FIG. 5 is a perspective view of a jig device applied to an embodiment of the present invention, and FIG. 6 is a process in which the holder abutment is aligned and fixed to the anterior side in the digital overdenture manufacturing method according to an embodiment of the present invention. It is an example diagram shown.

3 to 4, the fixture (f in FIG. 7a) is placed in a pair spaced apart on both sides on the anterior side of the restoration target arch 2 in response to the implantation information (B), and the fix It is preferable that the holder device 1400 is fixed to the chew (f of FIG. 7a).

At this time, although not shown in the drawing, it is preferable that a surgical guide is further prepared so that the fixture (f of FIG. 7a ) is placed in the correct position and direction corresponding to the implantation information (B). In detail, the inner surface of the surgical guide is molded and supported on the outer surface of the restoration target arch 2, and a guide hole is formed at a position corresponding to the placement information (B). At this time, it is preferable that the inner peripheral diameter of the guide hole is formed to correspond to the outer peripheral diameter of the body of the drill mechanism.

In addition, in a state in which the surgical guide is fixed to the restoration target arch 2, the surgical guide is firmly attached to the restoration target arch 2 through an anchor pin so as to prevent flow due to the vibration of the drill mechanism. can be fixed. Then, in a state in which the surgical guide is fixed to the restoration target arch 2, the drill mechanism is drawn in through the guide hole to form an implantation hole, and the fixture (f in FIG. 7a) is placed in the implantation hole. can be fixed.

And, the holder device 1400 is for fixing the state in which the digital overdenture is installed in the oral cavity. can be stably fixed in the oral cavity. Here, the holder device 1400 preferably includes a holder abutment 1410 , a fixing bar 1430 , and a pressing means 1440 .

In detail, the holder abutment 1410 has a connecting portion 1412 formed at the lower end inserted inside the upper end of the fixture (f of FIG. 7A) and a light oil insertion portion ( 1414) is preferably apertured. Here, it is preferable that the light oil inserting part 1414 is provided in the form of a slot groove recessed downward from the upper side of the body part 1411 in response to the pressing direction in which the pressing means 1440, which will be described later, is entered and coupled. At this time, it is preferable that the opening width of the light oil insertion part 1414 is formed to accommodate the cross-sectional spacing of the fixing bar 1430, which will be described later. In addition, a fastening hole (1413 in FIG. 7A) is formed through the holder abutment 1410 in the longitudinal direction, and a locking step protrudes in a radially inward direction on one inner periphery of the fastening hole (1413 in FIG. 7A). .

Here, the holder abutment 1410 is screwed to the upper end of the fixture (f of FIG. 7A ) through a fastening screw 1420 that is introduced into the fastening hole ( 1413 of FIG. 7A ). That is, the holder abutment 1410 through the fastening force that the lower end is screwed to the fixture (f of FIG. 7A) in a state in which the head portion 1421 formed at the upper end of the fastening screw 1420 is caught on the engaging step. ) may be firmly fixed to the upper end of the fixture (FIG. 7A f).

In addition, the fixing bar 1430 is preferably provided with a metal wire having a predetermined cross-sectional shape and extending to a predetermined length. In detail, the fixing bar 1430 may be provided by cutting a titanium or titanium alloy wire having a predetermined diameter to a predetermined length. In addition, the cross-sectional shape of the fixing bar 1430 may be formed in various shapes such as a circle, a polygon, an oval, a decut type, and preferably corresponds to the inner periphery shape of the inner end 1414a of the light oil insertion part 1414 It may be formed in a shape that is In addition, the fixing bar 1430 is inserted into the light oil insertion portion 1414 formed in the pair of holder abutment 1410, both ends of the body portion 1411 of each of the holder abutment 1410 outside. It is preferable to be provided with a length that can protrude. That is, the fixing bar 1430 may extend to a length exceeding the sum of the distance between the pair of the implantation information B and the diameter of the holder abutment 1410 .

The pressing means 1440 is coupled to the body portion 1411 of the holder abutment 1410, and provides a pressing force so that the fixing bar 1430 is pressed and fixed inside the light oil insertion portion 1414. In detail, a coupling groove 1415 communicating with the coupling hole 1413 is formed at the upper end of the body 1411 , and the pressing means 1440 is inserted into the coupling groove 1415 to enter and engage the pressing screw. can be provided with And, when the pressing means 1440 is coupled to the coupling groove 1415 and pressurizes the outer surface of the fixing bar 1430 inserted into the diesel insertion part 1414, the pressing means 1440 and the gas oil The fixing bar 1430 may be clamped and fixed between the inner ends 1414a of the insertion part 1414 . Through this, the fixing bar 1430 can be fixed to the anterior side of the oral cavity through a pair of the holder abutment 1410, and the fixing bar exposed between the pair of the holder abutment 1410 ( The clip 67 may be fitted and fixed to the central portion of the 1430 .

On the other hand, a holder cover portion 1450 coupled to surround the outer surface of the body portion 1411 may be further provided. In detail, the holder cover portion 1450 may have a communication insertion portion 1454 recessed in the opposite direction to the light oil insertion portion 1414 at a position corresponding to the light oil insertion portion 1414 may be formed. Therefore, when the holder cover part 1450 is coupled to surround the outer surface of the body part 1411, the fixing bar 1430 is between each inner end of the light oil insertion part 1414 and the communication inserting part 1454. can be placed.

Here, it is preferable that the upper end of the holder cover part 1450 is integrally formed in a closed ring shape to cover the outside of the coupling groove 1415 . Accordingly, the upper end of the body portion 1411 divided through the light oil insertion portion 1414 is spread out radially by the volume of the pressing means 1440 coupled to the coupling groove 1415, and thereby Deformation or fracture of the upper end of the holder abutment 1410 may be prevented in advance. Through this, the state in which the pressing means 1440 is screwed to the coupling groove 1415 can be firmly maintained, and the fixing bar 1430 is firmly clamped to the pair of the holder abutments 1410 . It can be press-fixed.

Meanwhile, referring to FIGS. 5 to 6 , the opening directions of both sides of the light oil insertion part 1414 formed in the pair of holder abutment 1410 are arranged in a straight line to communicate with the holder abutment 1410. It is preferable that a jig device 10 for guiding the fixing direction is provided. Here, the jig device 10 is provided in a shape to be individually coupled to each of the holder abutments 1410, and therefore a jig member for coupling the holder abutment 1410 is separately designed and manufactured according to the patient. The hassle of doing it can be minimized.

In detail, the jig device 10 includes a body 11 and an alignment head 14 . Here, the body portion 11 of the jig device 10 has a receiving groove 12 into which the upper end of the holder abutment 1410 is inserted, and a through hole communicating with the receiving groove 12 . (13) is preferably penetrated upwards. In addition, it is preferable that an alignment protrusion 12a fitted to the light oil insertion portion 1414 formed at the upper end of the holder abutment 1410 protrudes from the inner periphery of the receiving groove 12 . In detail, the alignment protrusion (12a) is protruded downward to both sides of the through hole (13), it is preferable to protrude to a width corresponding to the upper end of the light oil insertion portion (1414). That is, when the jig device 10 is fitted and coupled to the upper end of the holder abutment 1410, the alignment protrusion 12a is inserted into the light oil insertion part 1414, and the jig device 10 is the receiving As the groove 12 is rotated, the holder abutment 1410 may be interlocked and rotated.

In addition, the alignment head 14 is extended outward in the horizontal direction from the upper edge of the body 11 of the jig device 10, it is preferable that a straight alignment groove 15 that crosses the upper surface is formed. At this time, it is preferable that the alignment groove 15 protrudes parallel to the alignment protrusion 12a. Here, the alignment coupling bar 19 extending in the longitudinal direction is inserted into the alignment groove 15 . At this time, the alignment coupling bar 19 is preferably formed of a rigid material that minimizes deformation due to an external force transmitted through a fixing means such as a driver/drill inserted through the through hole 13 .

Therefore, as long as the alignment coupling bar 19 is simultaneously inserted into the alignment grooves 15 formed on each upper surface of the pair of jig devices 10, the alignment grooves 15 are straight in the left and right direction of the anterior teeth. may be arranged to communicate with In a state in which the pair of jig devices 10 are aligned through the alignment coupling bar 19 , the holder abutment 1410 may be guided and fastened to the fixture in the correct direction.

As such, in the present invention, since the jig device 10 is provided to be individually coupled to each holder abutment 1410 , the spacing between the pair of holder abutments 1410 and the receiving groove of each jig device 10 . The coupling tolerance between (12) can be formed substantially close to zero. That is, the jig device 10 is provided so as to correspond to each of the holder abutments 1410 individually, the opening direction of the light oil insertion portion 1414 is aligned through the alignment coupling bar 19 . Therefore, the jig device 10 can be standardized and mass-produced for general purpose, so that the convenience and economic efficiency of the operation can be significantly improved.

On the other hand, a pair of the holder abutment 1410 is disposed at the upper end of the fixture (f of FIG. 7a) which is placed in the position corresponding to the implantation information (B) in the restoration target arch 2, each The jig device 10 is coupled to the upper end of the holder abutment 1410, respectively. In detail, the alignment protrusion 12a formed inside the receiving groove 12 is inserted into the light oil insertion portion 1414 formed in the holder abutment 1410 .

Then, the alignment coupling bar 19 is simultaneously inserted into the alignment groove 15 formed on the upper surface of each of the jig devices 10 . Here, since the alignment groove 15 and the alignment protrusion 12a are formed parallel to each other and the alignment protrusion 12a is fitted to the upper end of the light oil insertion part 1414, the alignment coupling bar 19 is the As long as they are simultaneously inserted into the alignment grooves 15, the light oil insertion portion 1414 may be aligned to communicate in a straight line.

Then, the fixing means is inserted through the through-holes 13 formed in each of the jig devices 10, and it is pre-inserted into the holder abutment 1410 to the fixture (f of FIG. 7a). The pre-fastened fastening screw 1420 may be completely fastened to the fixture (f of FIG. 7A ). Here, the preliminary fastening is preferably understood as a state in which the fastening screw 1420 is loosely fastened leaving 2 to 3 turns at the upper end of the fixture (f of FIG. 7a), and the holder abutment ( 1410) is preferably understood to be in a rotatable state without being separated from the fixture (f of FIG. 7A). In addition, the term "completely fastened" means that the holder abutment 1410 is in a state in which separation and rotation of the holder abutment 1410 from the fixture (f of FIG. This is preferable.

As such, in the present invention, the light oil insertion portion 1414 opened in both directions of the pair of the holder abutment 1410 may be arranged to easily communicate in a straight line through the jig device 10 . Therefore, the fixing bar 1430 formed of a rigid material such as titanium or titanium alloy so as not to substantially deform with respect to an external force such as masticating pressure is formed in the pair of holder abutment 1410, the light oil insertion portion 1414 It is possible to prevent in advance that the outer periphery of the fixing bar 1430 interferes with the inner periphery of the light oil insertion part 1414 even if it is simultaneously inserted into the . Accordingly, the fixing bar 1430 can be firmly clamped and pressed between the inner end 1414a of the light oil insertion part 1414 and the pressing means 1440 .

In addition, since the length of the fixing bar 1430 is formed only with the minimum length to which the clip can be coupled, the length may be formed so as not to exceed the anterior volume of the digital overdenture. Accordingly, the complicated process of bending the fixing bar 1430 to fit the dental arch line (e) of the oral cavity can be substantially omitted, and the fixtures can be installed in a minimum number of pairs on the anterior side only. Through this, the multi-step drilling process and fixture implantation process for the implantation of the fixture can be simplified and the treatment period can be significantly shortened, and the treatment area in the oral cavity is reduced, so that the alveolar bone is weakened or the healing period is increased. can be substantially prevented.

That is, compared to the prior art in which the fixture and the holder abutment are also placed on the posterior side so that both ends of the fixing bar 1430 bent in response to the dental arch line (e) are supported, the procedure is performed with a minimum amount of treatment. The speed can be significantly improved. In addition, unlike the prior art in which the alveolar bone cutting process was required to match the implantation height so that the rigid fixing bar 1430 is supported on the pair of anterior teeth and the pair of posterior teeth, the present invention provides that the fixture is provided only on the anterior side of the oral cavity. is installed with Therefore, since a separate alveolar bone cutting process is not required, the procedure can be shortened and the patient's discomfort and pain can be significantly reduced. In addition, when the fixture is placed on the molar side, the problem that the lower alveolar nerve may be damaged is fundamentally eliminated, so safety can be significantly improved.

7A and 7B are exemplary views showing a correction process of temporary dentures in a digital overdenture manufacturing method according to an embodiment of the present invention, and FIG. 8 is design information in a digital overdenture manufacturing method according to an embodiment of the present invention. It is an example diagram showing the acquisition process of And, Figure 9 is an exemplary view showing the inner side of the digital overdenture manufactured according to an embodiment of the present invention, Figure 10 shows the fixing process of the clip in the digital overdenture manufacturing method according to an embodiment of the present invention This is a cross-sectional view.

7A and 7B, a temporary holder inserting part 35 that is fitted with the outer surface of the holder device 1400 on the inner surface and a close contact part 36 that is mated with the outer surface of the posterior side of the restoration target arch (2) ) The temporary dentures 30 corrected to be formed are prepared. Here, the temporary denture 30 is integrally extended from the root side of the temporary tooth part 32 and the temporary tooth part 32 whose outer surface is occluded with the opposing arch 3, and the restoration target arch ( 2) and it is preferable to include a temporary gum portion (33) formed with an allowance groove (33a) so as to surround and spaced apart.

In detail, it is preferable that the temporary dentures 30 are standardized and provided for general purpose in response to a preset standard dentition arch profile. In this case, the standard dental arch is preferably understood as an arc-shaped virtual line corresponding to the profile in which the teeth are actually arranged or a shape in which the virtual region is extended. These standard dentate arch profiles are standardized and calculated in consideration of age-specific and gender anatomical deviations, but are standardized and set step-by-step to be universally applied to the oral cavity of various patients. For example, the temporary denture 30 is provided in a standard shape standardized in large/medium/small, and may be provided by being pre-manufactured in real life or prepared as 3D design information and 3D printing if necessary.

At this time, the temporary denture 30 is three-dimensionally printed with a material that softens when heated to a temperature higher than a preset temperature so that the temporary gum portion 33 side is pressurized and deformed in response to the vertical diameter (VD) through occlusal pressure. It is preferred to be prepared. For example, the temporary denture 30 may be formed of a base resin including an acrylic oligomer. And, the temporary denture 30 manufactured by three-dimensional printing of the base resin, in particular, the inner surface of the temporary gum part 33 is partially immersed in warm water heated to a softening temperature range of 60 to 70 ° C. do.

And, when the heated temporary denture 30 is installed between the restoration target arch 2 and the opposing arch 3 and occlusal pressure is applied, the temporary gum part 33 is moved to the restoration target arch 2 ) can be pre-deformed to correspond to the dental arch.

At this time, the spare groove (33a) is formed to be sized to be spaced apart from the outer surface of the restoration target arch 2, and the holder spare groove (33b) exceeding the volume of the upper side of the holder device 1400 is further provided on the anterior side. can be formed. That is, the inner portion of the temporary denture 30 is formed as a groove sized to be spaced apart from the outer surface of the standard dentition arch, and the dentition corresponding to the anterior and posterior side of the restoration target arch (2). It can be formed as a whole along the Goong line. In addition, the holder clearance groove (33b), which is larger than the volume of the holder device (1400), may be further depressed toward the temporary tooth portion (32) on the anterior inner surface of the clearance groove (33a).

Accordingly, a predetermined gap is formed between the restoration target arch 2 and the spare groove 33a, and between the holder device 1400 and the holder spare groove 33b. In addition, dental resin r1 is filled in the spare groove 33a and the holder spare groove 33b. And, the temporary denture 30 filled with the dental resin r1 in the spare groove 33a and the holder spare groove 33b in the restoration target arch 2 to which the holder device 1400 is fixed. When is installed, the temporary holder inserting part 35 corresponding to the outer surface shape of the holder device 1400 in the curable resin r1 may be formed by pressing and hardening intaglio on the anterior side. In addition, on both sides of the temporary holder insertion part 35, the close contact part 36 corresponding to the posterior surface of the posterior gum of the restoration target arch 2 may be formed by pressing and hardening in an intaglio shape. At this time, it is preferable to understand that the dental resin r1 is a resin used for taking impressions or re-lining in dentistry.

As such, the temporary holder insertion part 35 formed in the temporary denture 30 through the occlusal pressure can be utilized as design information of the holder insertion part formed in the digital overdenture to be described later. In addition, when the temporary denture 30 is temporarily used during the design period of the digital overdenture, the holder device 1400 may be inserted and expanded as a coupling area to be temporarily fixed. The temporary denture 30 corrected in this way can be hardened to have a rigidity that guarantees the support strength against the masticatory pressure when temporarily used as the photocuring process is performed once or multiple times.

Meanwhile, referring to FIGS. 7A to 8 , an auxiliary scanning image m30 for the temporary prosthesis is obtained by scanning the entire inner and outer surfaces of the corrected temporary denture 30 . Further, it is preferable that the swapped corrected scanning image m30A is obtained so that the three-dimensional surface information m35 of the temporary holder insertion part is exposed to the outside in the auxiliary scanning image m30. Here, it is preferable to understand that the term "swap" means that a preset image is replaced or exchanged with another image or an image transformed according to image processing.

In detail, the auxiliary scanning image m30 is transmitted to the planning unit, and a boundary line x is set between the internal 3D surface information m33 of the temporary gum part and the 3D surface information of the temporary tooth part. At this time, the boundary line (x) is preferably set along the outer side of the three-dimensional surface information (m33) of the inner surface of the temporary gum part, preferably outside the outer outer line of the three-dimensional surface information of the spare groove. A boundary line (x) may be set.

Then, a fastening region is set along the inner surface of the boundary line x, and the three-dimensional surface information of the temporary denture 30 except for the fastening region is set as the erased region m39. Subsequently, the erased area m39 is erased and the three-dimensional surface information m33 of the inner surface of the temporary gum part and the three-dimensional surface information m35 of the temporary holder insertion part included therein are swapped to be exposed to the outside. It may be obtained as the corrected scanning image m30A. That is, the corrected scanning image m30A includes the three-dimensional surface information m35 of the temporary holder insertion part and the internal three-dimensional surface information m33 of the temporary gum part in the auxiliary scanning image m30, preferably the margin. It is preferable to understand that it is image information including the three-dimensional surface information of the groove and the three-dimensional surface information (m35) of the temporary holder insertion part.

At this time, the 3D surface information included in the auxiliary scanning image m30 is stored as surface information having substantially no thickness. Accordingly, in the corrected scanning image m30A, the coordinate values for the inner profile and the coordinate values for the outer profile are substantially the same. Therefore, the three-dimensional surface information m35 of the temporary holder insertion part is displayed in a shape into which the holder device 1400 can be inserted, and the three-dimensional surface information of the close contact part is the posterior side of the restoration target arch 2 The gum portion may be imaged and displayed in a shape that can be matched. Accordingly, design information for the inner surface of the digital overdenture may be set based on the three-dimensional surface information m33 on the inner surface of the temporary gum portion.

As such, in the present invention, the inner surface side design information of the overdenture 60 is obtained based on the image information of the temporary denture 30 corrected in response to the restoration target arch (2). At this time, since the temporary holder insertion part 35 and the close contact correspondence part 36 are formed in an intaglio while being pressed to the actual holder device 1400 and the restoration target arch 2 through an occlusal force, the three-dimensionality of the temporary holder insertion part The holder insertion part 65 designed based on the surface information m35 may be formed at an accurate position. In addition, the temporary denture 30 is corrected and the digital overdenture is based on the three-dimensional surface information of the close contact unit 36 in which the shape matching error is corrected so that it is in close contact with the outer surface of the posterior gum of the restoration target arch 2 . The shape of the inner surface of the posterior teeth can be precisely formed.

On the other hand, referring to FIGS. 8 to 9 , the digital overdenture 60 includes the holder insertion part 65 formed based on the three-dimensional surface information m35 of the temporary holder insertion part and the three-dimensional contact correspondence part. The shape-fitting seating groove 65c formed based on the surface information can be precisely formed to correspond to the exact position and shape of the restoration target arch 2 and the holder device 1400 fixed thereto. Through this, when the digital overdenture 60 is installed in the oral cavity, the digital overdenture 60 can be installed at a preset precise position in the restoration target arch 2 . Accordingly, when the digital overdenture 60 is installed in the oral cavity, the occlusal and mastication accuracy with the opposing arch 3 is improved, thereby providing a comfortable feeling of use, and substantially conforming to the restoration target arch 2 Since the locally compressed or excessively loose parts are minimized, the feeling of satisfaction can be significantly improved.

Furthermore, while the anterior side of the digital overdenture 60 is fixed through the fitting coupling between the holder device 1400 and the clip to be described later, the posterior side is the posterior gum of the restoration target arch 2, and the mold seating groove 65c ) is molded to fit substantially tight, so that lifting during mastication can be minimized. At this time, the conventional adhesive for dentures may be further applied between the mating seating groove 65c and the outer surface of the posterior gum so that the digital overdenture 60 is more stably fixed in the oral cavity.

On the other hand, the three-dimensional surface information m35 of the temporary holder inserting part can be set as clear design information of the holder inserting part 65 through the following series of processes.

First, a virtual artificial tooth part and a virtual artificial gum part are extracted from the digital library and virtually placed on the planning image (M). At this time, it is preferable that the inner surface of the virtual artificial gums is replaced with a corrected scanning image m30A, and the corrected scanning image m30A is extracted from the digital library and replaced with a virtual holder device m40 to be matched.

Here, it is preferable that the digital library be understood as a database in which basic appearance information of components used for dental restoration is stored as 3D vector data. The digital library includes a plurality of external information about the real holder abutment 1410, the real fixed bar 1430, and the real fixture (f), the temporary denture 30 and the digital overdenture It is preferable that a plurality of digital appearance information for (60) is also included. In addition, digital external information optimized for each patient's oral cavity among a plurality of digital external information may be extracted and virtually placed on the planning image M. As shown in FIG.

Then, the virtual holder device m40 corresponding to the real holder device 1400 is selected and extracted from the digital library. At this time, in the virtual holder device m40, a pair of virtual holder abutments m41 and a virtual fixing bar m43 are virtually arranged to correspond to the actual holder device 1400, and digital appearance information in a set state can be extracted with At this time, the virtual holder abutment m41 and the virtual fixing bar m43 are set and quickly extracted, and the position or length is individually adjusted as they are virtually overlapped based on the common part with the temporary hole insertion part. can be

At this time, when the virtual holder device m40 and the corrected scanning image m30A are matched, the three-dimensional surface information m35 of the temporary holder insertion unit in the corrected scanning image m30A is transferred to the virtual holder device m40. replacement is corrected. Accordingly, the surface unevenness, notch, pore, or distortion or damage that may occur during the scanning process can be eliminated when the temporary holder inserting part 35 is pressed against the holder device 1400 . Through this, the holder inserting part 65, into which the holder device 1400 is inserted, is aligned at the correct position based on the corrected scanning image m30A, and the shape is clarified based on the virtual holder device m40, so that the precision can be formed.

In this case, it is preferable that the virtual clip m67 is virtually disposed on the virtual holder device m40. In addition, a virtual buried hole matching the virtual clip m67 may be set to generate design information of the digital overdenture 60 . As such, in the present invention, the overall plan and design information of dental restoration can be established based on the three-dimensional surface information and alveolar bone information (A) obtained from the actual oral cavity and digital appearance information stored in advance in the digital library. In addition, the generated overall design information may be generated and stored in a format consisting of surface information such as a STL file (StereoLithography file). Therefore, it can be easily set or converted into a 3D graphic file format that can be easily processed in 3D using a manufacturing apparatus such as a 3D printer.

On the other hand, the digital overdenture 60 manufactured by 3D printing may be provided in a form in which the artificial gum part and the artificial tooth part are separated and assembled, and in some cases, the artificial gum part and the artificial tooth part may be integrally formed. may be Here, when the artificial tooth part of the artificial tooth part is separately manufactured and assembled, each part may be made of a different material. In addition, the digital overdenture 60 may be 3D printed with the artificial gums and the artificial teeth, and a chromic layer of a preset color may be further applied and cured on the surface. Through this, it is possible to receive a high-quality dental restoration with significantly improved aesthetics by matching the color of the oral cavity.

On the other hand, the holder insertion part 65 into which the holder device 1400 is inserted and fixed is formed on the inner surface side of the digital overdenture 60, and based on the virtual buried hole in the center of the holder insertion part 65 The buried hole 66 is formed through. Then, the mating seating grooves 65c are formed on both sides of the holder insertion part 65 to be fitted to the posterior surface of the gums on the posterior side of the restoration target arch 2 . Here, the clip 67 is embedded and fixed in the embedding hole 66 , so that the embedding position and direction of the clip 67 are aligned with the holder device 1400 , in particular, the fixing bar 1430 . The 67 may be fixed to the inside of the buried hole 66 through the following series of processes.

In detail, the holder device 1400 is fixed to the restoration target arch 2 , and the clip 67 is fastened to the fixing bar 1430 included in the holder device 1400 . At this time, it is preferable that the clip 67 is installed corresponding to a position where the virtual clip m67 is virtually disposed on the virtual holder device m40.

Then, the digital overdenture 60 is installed in the restoration target arch 2 so that the holder device 1400 is inserted into the holder insertion part 65 . At this time, the holder inserting part 65 includes a first matching part 65a corresponding to the outer surface shape of the holder abutment 1410 and a second matching part corresponding to the outer surface shape of the fixing bar 1430 ( 65b). Therefore, when the holder device 1400 is inserted into the holder insertion part 65, the holder device 1400 is caught and constrained through the step difference between the first mold part 65a and the second mold part 65b. Accordingly, the front-back and left-right flow of the digital overdenture 60 may be restricted.

In addition, the buried hole 66 is set based on the position of the virtual clip m67 that is virtually disposed in the planning image M. As shown in FIG. Accordingly, the diameter of the buried hole 66 can be formed compactly with a minimum error interval with respect to the overall size of the clip 67 .

At this time, the position where the clip 67 is fastened to the fixing bar 1430 is confirmed through the embedding hole 66 , and as the curable resin r2 is injected and cured into the embedding hole 66 , the clip (67) is fixed in the buried hole (66). Here, it is preferable that the curable resin r2 includes the same material as that used for manufacturing the digital overdenture 60 . Through this, even after the curable resin r2 is hardened through a high degree of adhesion between the same materials, it is possible to substantially prevent peeling and detachment from the buried hole 66 . In addition, a rubber dam portion disposed to cover the surface of the restoration target arch 2 may be further provided to prevent the curable resin r2 from flowing down into the oral cavity through the embedding hole 66 . The rubber dam part may be provided as a flexible rubber thin plate, and it is preferable to understand that the curable resin r2 is injected and cured into the embedding hole 66 and then separated from the restoration target arch 2 .

In addition, the relining resin is applied and pressed through the occlusal pressure to the mating seating groove portion 65c, so that it can be corrected to be substantially in close contact with the posterior gums of the restoration target arch (2), and the viscosity of the relining resin Through this, the mating seating groove 65c can be firmly attached and fixed to the outer surface of the posterior gum of the restoration target arch 2 .

As such, in the present invention, the anterior side of the digital overdenture 60 is fitted and fixed through the clip 67, and the posterior side is the posterior gum outer surface of the restoration target arch (2). It can be fixed in shape by correcting the error so that the Therefore, even if the holder device 1400 is formed with a minimum volume only toward the anterior teeth, it can be stably fixed along the entire dental arch of the restoration target arch 2, and the digital overdenture 60 is substantially removed from the oral cavity. Since separation is prevented, the convenience of use can be significantly improved.

In addition, the fixture for fixing the fixing bar 1430 as the fixing bar 1430 is formed to a length accommodated in the anterior region of the restoration target arch 2 and the digital overdenture 60 (f) and the number of the holder abutment 1410 may be formed to a minimum. Through this, the required parts used for dental restoration through the digital overdenture 60 are minimized, and the time required for design and operation can be significantly reduced.

In addition, as the arrangement position of the fixture (f) and the holder device 1400 is limited to the anterior side, the parts used for the dental restoration procedure may be minimally required, and the fixture (f) and the holder device 1400 The time required to implant and install the 1400 in the oral cavity can be significantly reduced. Through this, the manufacturing of the digital overdenture 60 and the procedure for installing the digital overdenture 60 in an accurate position in the oral cavity are simplified, and the cost required for this is significantly reduced, so that economic efficiency can be significantly improved. . In addition, it can be provided to patients at a more affordable price than conventional dental restorations through simplification and speeding of the procedure, thereby securing market competitiveness.

On the other hand, terms such as "comprises", "comprises", "provide" or "have" described above mean that the corresponding component may be inherent, unless otherwise stated. It should be construed as not excluding components, but may further include other components. All terms, including technical and scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which the present invention belongs, unless otherwise defined. Terms commonly used, such as those defined in the dictionary, should be interpreted as being consistent with the contextual meaning of the related art, and are not interpreted in an ideal or excessively formal meaning unless explicitly defined in the present invention.

As described above, the present invention is not limited to each of the above-described embodiments, and variations can be implemented by those of ordinary skill in the art to which the present invention pertains without departing from the scope of the claims of the present invention. and such modifications are within the scope of the present invention.

M: Planning image m30A: Corrected scanning image
30: temporary denture 33a: spare groove
33b: holder free groove 35: temporary holder insertion part
36: close contact unit 60: digital overdenture
65: holder insertion portion 65c: mold mounting groove portion
67: clip 1400: holder device
1410: holder abutment 1430: fixed bar

Claims (5)

In the planning image generated so that the surface information and the alveolar bone information of the restoration target arch and the opposing arch are displayed as a three-dimensional image aligned in correspondence with a preset vertical height, the placement information of the fixture is spaced apart on both sides in the anterior region of the alveolar bone and a pair A first step in which the alignment is set;
The fixture is placed in a pair spaced apart on both sides on the anterior side of the restoration target arch in response to the implantation information, and a holder device is fixed to the fixture, the holder device and the posterior side of the restoration target arch a second step of preparing the corrected temporary dentures to form a temporary holder insertion part and a close-fitting part that are respectively matched with the outer surface;
a third step of obtaining a corrected scanning image obtained by scanning the corrected temporary dentures and swapped so that each of the three-dimensional surface information of the temporary holder insertion unit and the close contact unit is exposed to the outside; and
A digital overdenture manufacturing method comprising a fourth step of manufacturing a digital overdenture in which an inner surface portion is formed based on the corrected scanning image and a through hole is formed so that a clip detachably fastened to the holder device is fixed through a curable resin. The method of claim 1,
In the second step, the temporary dentures
A temporary tooth part having an outer surface occluded with the opposing arch, and a temporary gum part integrally extending from the root side of the temporary tooth part and having an allowance groove formed on the inner side to be spaced apart from the restoration target arch and wrapped around it;
The step of filling the allowance groove with dental resin, and the temporary holder inserting part corresponding to the outer surface shape of the holder device is formed by pressing the dental resin in the dental resin by occlusal pressure in an engraved manner on the anterior side, and the temporary holder inserting part Digital overdenture manufacturing method, characterized in that it is corrected including the step of pressing and forming intaglio the contact corresponding portion corresponding to the outer surface of the posterior gum of the restoration target arch on both sides. 3. The method of claim 2,
In the third step, the corrected scanning image,
Setting the fastening area part with the boundary of the inner part image of the temporary gum part in the auxiliary scanning image obtained by scanning the inner and outer surfaces of the corrected temporary denture;
The three-dimensional surface information of the temporary dentures except for the fastening area part is erased, and the inner surface information of the temporary holder insertion part and the inner surface information of the gum part are swapped to be exposed to the outside,
In the fourth step, the temporary prosthesis is corrected on the inner surface of the posterior side of the digital overdenture and the restoration target arch is based on the inner surface information of the contact correspondence part whose shape error is corrected so as to be in close contact with the outer surface of the gum on the posterior side. Digital overdenture manufacturing method, characterized in that the mold-fitting seating groove is formed on the outer surface of the gum. 4. The method of claim 3,
The fourth step is
A step of extracting virtual artificial teeth and virtual artificial gums from a digital library and virtually placing them on the planning image, the inner surface of the virtual gums being swapped with the corrected scanning image;
The step of replacing and correcting the inner surface information of the temporary holder inserting unit with a virtual holder device that is extracted and matched from the digital library;
Digital overdenture manufacturing, characterized in that the virtual clip is virtually placed in the virtual holder device, a virtual buried hole matching the virtual clip is set, and the design information of the digital overdenture is generated and transmitted to a manufacturing device. Way. The method of claim 1,
In the second step, the holder device has a pair of holder abutments that are opened on both sides of the upper end and are fastened to the fixtures, and the light oil inserts formed in the pair of holder abutments at the same time It is inserted and includes a fixing bar to which the clip is fastened, and a pressing means for providing a pressing force while entering downwardly from the upper end of each of the holder abutments so that the fixing bar is pressed and fixed inside the light oil insertion part,
Inserting each lower end of the pair of holder abutments on the upper side of the fixture, and the upper end of the holder abutment is accommodated, including a receiving groove formed therein with an alignment protrusion mating with the light oil insertion portion A step of coupling the jig device to each of the holder abutments, and a straight alignment coupling in the alignment groove recessed in a direction parallel to the alignment protrusion in the upper surface portion of the pair of jig devices so that the opening direction of each of the light oil inserts is aligned. Digital comprising the steps of simultaneously coupling a bar and fixing the holder abutment to the fixture by fastening the fastening screw through a fixing means introduced through a through hole communicating with the receiving part A method for manufacturing an overdenture.

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