阅读说明：本技术 3d打印牙周辅助加速成骨正畸治疗手术导板及其制备方法 (3D printed periodontal auxiliary accelerated osteogenesis orthodontic treatment surgical guide plate and preparation method thereof ) 是由 孙江 于 2021-09-15 设计创作，主要内容包括：本发明公开了一种3D打印牙周辅助加速成骨正畸治疗手术导板及其制备方法。通过3D打印技术制备牙周辅助加速成骨正畸治疗手术导板,导板本体能贴合固位在术区牙位,结合锥形束CT、口扫数据设计沟槽、血运孔,指示牙槽骨需行骨皮质切开及打孔的部位,防止伤及牙根等重要解剖部位,有效避免骨皮质切开及打血运孔过深及过浅问题。将超声骨刀说明书中刀头、钻头数据导入到3shape软件即可与手术导板中沟槽及血运孔尺寸精准匹配,无需应用microCT扫描超声骨刀刀头、钻头,也无需设置滚轮卡定位器等装置,制备出的手术导板结构简单,可达到指导手术精准实施的目的,不但降低了导板制作难度,还提高了手术导板的稳定性,可在临床上广泛推广。(The invention discloses a 3D printed periodontal auxiliary accelerated osteogenesis orthodontic treatment surgical guide plate and a preparation method thereof. Prepare the supplementary just abnormal treatment operation baffle of osteogenesis with higher speed of periodontal through 3D printing technique, the baffle body can laminate the maintenance in operation district tooth position, combines toper bundle CT, mouth to sweep data design slot, blood transport hole, instructs alveolar bone to need to carry out the position that the cortex of bone cuts and punch, prevents to injure important anatomical site such as root of a tooth, effectively avoids the cortex of bone to cut and transport the hole too deeply and too shallow problem of beating blood. The data of the cutter head and the drill bit in the ultrasonic osteotome specification are led into 3shape software, so that the data can be accurately matched with the sizes of the groove and the blood transportation hole in the operation guide plate, the cutter head and the drill bit of the ultrasonic osteotome can be scanned by using a micro CT (computed tomography) without arranging devices such as a roller card positioner, the prepared operation guide plate has a simple structure, the aim of guiding the accurate implementation of an operation can be fulfilled, the difficulty in manufacturing the guide plate is reduced, the stability of the operation guide plate is improved, and the operation guide plate can be widely popularized clinically.)

1. A preparation method of a 3D printed periodontal assisted accelerated osteogenesis orthodontic treatment surgical guide plate is characterized by comprising the following steps:

step 1, acquiring oral scanning data and cone beam CT data of a patient, and segmenting the oral scanning data and the cone beam CT data by using mimics software;

step 2, importing mouth scanning data and cone beam CT data segmented by the mimics software into 3shape software, matching the mouth scanning data and the cone beam CT data by using the 3shape software to obtain a three-dimensional reconstructed dentition model, drawing a surgical area range by using a drawing tool in the 3shape software, and calibrating the position of a tooth root and the shape of an alveolar bone around the tooth to generate a first substrate;

step 3, importing the data of the ultrasonic osteotome head and the data of the ultrasonic osteotome drill bit into 3shape software;

step 4, measuring a first position and a second position on the first substrate by using a 3shape software measuring tool, drawing a cuboid-shaped longitudinal groove at the first position by using a drawing tool of the 3shape software, and drawing a line at the second position to obtain the tail end of the longitudinal groove; the first position is a position 2-3mm away from the crest of the alveolar ridge; the second position is a position 2-4mm away from the root of the cusp area of the tooth; setting the width of the longitudinal groove according to the data of the ultrasonic osteotome head;

step 5, drawing a cuboid-shaped transverse groove at the second position by using a drawing tool of 3shape software; setting the width of the transverse groove according to the data of the ultrasonic osteotome head;

step 6, measuring and calibrating a region with the thickness of cortical bone between the root of the tooth and the root surface being more than 1mm by using a measuring tool in 3shape software, and drawing a plurality of blood transportation holes in the region; setting the diameter of each blood transport hole according to the data of the ultrasonic osteotome drill bit;

step 7, importing data of the first substrate drawn with the longitudinal grooves, the transverse grooves and the blood transportation holes into 3-matic software, and shearing the longitudinal grooves, the transverse grooves and the parts needing to be removed in the blood transportation holes on the first substrate by using a 3-matic software shearing tool, wherein the tail ends of the longitudinal grooves are open;

and 8, processing the data obtained after the 3-matic software processing into an STL format, importing the data into 3D printing equipment for 3D printing, and obtaining the periodontal auxiliary accelerated osteogenesis orthodontic treatment surgical guide plate.

2. The method for preparing a 3D printed periodontal assisted accelerated orthodontic treatment surgical guide according to claim 1, wherein the depth of the longitudinal groove is 1-2mm and the width of the longitudinal groove is 1 mm.

3. The method for preparing a 3D printed periodontal assisted accelerated orthodontic treatment surgical guide according to claim 1, wherein the depth of the transverse groove is 1-2mm and the width of the transverse groove is 1 mm.

4. The method for preparing a 3D printed periodontal assistance accelerated osteogenesis orthodontic treatment surgical guide according to claim 1, wherein after step 7 and before step 8, further comprising:

drawing a line on the crown of the crown in the operation area by using 3shape software to generate a second substrate with the thickness of 2 mm;

and performing Boolean operation on the second substrate and the first substrate by using 3-matic software to obtain a third substrate with a thickened crown.

5. The method for preparing a 3D printing periodontal assistance accelerating osteogenesis orthodontic treatment surgical guide plate according to claim 1 or 4, wherein the step 8 further comprises, before processing the data obtained after the 3-matic software processing into STL format:

and finishing the longitudinal grooves, the transverse grooves and the blood transportation holes through a 3-matic software trimming command, so that the lines of the longitudinal grooves, the transverse grooves and the blood transportation holes are smooth and smooth.

6. The method for preparing a 3D printed periodontal assisted accelerated osteogenesis orthodontic treatment surgical guide plate according to claim 1, wherein the blood transport holes are circular holes with a diameter of 1.5mm, and the two blood transport holes are spaced at least 2mm apart and have a depth of 2 mm.

7. A 3D printed periodontal assisted accelerated osteogenesis orthodontic treatment surgical guide prepared by the method for preparing the 3D printed periodontal assisted accelerated osteogenesis orthodontic treatment surgical guide according to any one of the above claims 1 to 6.

Technical Field

The invention relates to the technical field of medical equipment, in particular to a 3D-printed periodontal auxiliary accelerated osteogenesis orthodontic treatment surgical guide plate and a preparation method thereof.

Background

With the development of economy, people have increasingly high aesthetic requirements, and have attracted extensive attention to the problem of malocclusion such as irregular dentition, and the proportion of patients requiring orthodontic treatment, especially adult patients, seeking orthodontic treatment is increasing year by year. However, adult orthodontic treatment is difficult. Firstly, the growth and development of adults are stopped, the bone metabolism and alveolar bone reconstruction are slow, the required correction time is longer than that of children, clinically, the orthodontic treatment of adults has a very small effect in a short period due to the fact that the tooth moving speed is too slow, secondly, adult patients often have the problems of insufficient bone quantity around teeth and the like, the tooth moving in the orthodontic treatment easily causes serious complications such as alveolar bone cracking and the like, and the problems become the main reasons for giving up or interrupting the orthodontic treatment of adults. Therefore, how to accelerate the movement of adult teeth, shorten orthodontic treatment time and increase bones at the positions with insufficient periodontal bone mass has become a hot spot of domestic and foreign research in recent years for protecting driving of orthodontic treatment.

At present, periodontal assisted accelerated osteogenic orthodontic treatment (PAOO) technology is proven to be capable of effectively accelerating tooth movement in clinical and basic research aspects, and bone increment is carried out at sites with insufficient bone mass, so that the application in clinical is increasingly wide.

In the manufacturing process of the conventional PAOO surgical guide plate, a Micro Computed Tomography (Micro CT) technology is required to be applied to scan the ultrasonic osteotome head and the drill bit. Micro CT, also called Micro CT and Micro CT, is a nondestructive 3D imaging technique, which can clearly understand the internal microstructure of a sample without destroying the sample, and the biggest difference from common clinical CT is that the resolution is higher and can reach micrometer (μm) level. However, the radiation dose of the micro ct is high, the scanning and three-dimensional reconstruction time is long, the technical operation is complex, and the manufacturing difficulty of the surgical guide plate is increased. And the cost of the micro CT is high, the manufacturing cost of the guide plate is increased, and the micro CT is unacceptable for many patients.

Moreover, when the ultrasonic osteotome head and the drill bit are scanned by the micro ct, the advancing positions of the ultrasonic osteotome head and the drill bit need to be positioned, and the positioning device is often complicated in structure, for example, in chinese patent CN 202010802920.0-periodontal accelerated osteogenesis assisted orthodontic treatment surgical guide plate system and the forming method thereof, the PAOO surgical guide plate is designed with the positioning devices such as the roller card positioner on the alveolar bone positioning plate, and the roller card positioner comprises the complicated structures such as the i-shaped guide rail, the U-shaped slide block, the slide groove, the roller and the like. The complicated positioner structure has not only increased PAOO operation baffle preparation degree of difficulty, moreover because PAOO operation turns over valve back operation district anatomy structure narrowly, the PAOO operation baffle that is provided with complex structure can increase the instability of operation baffle, is difficult to stable just to be located the operation district, and 3D printing is provided with the PAOO operation baffle of complex structure and also is more fragile, cuts off easily among the operation process.

Disclosure of Invention

In order to solve the problems, the invention provides a 3D printing periodontal auxiliary accelerating osteogenesis orthodontic treatment surgical guide plate and a preparation method thereof, the surgical guide plate is prepared by a 3D printing technology, a guide plate body can be attached and retained at a tooth position of a surgical area, a groove and a blood circulation hole are designed by combining cone beam CT and oral scanning data, the position of an alveolar bone needing to be subjected to cortical bone dissection and punching is indicated, important anatomical parts such as tooth roots are prevented from being injured, and the problems of the cortical bone dissection, the too deep and the too shallow of the blood circulation hole are effectively avoided. The data of the cutter head and the drill bit in the ultrasonic osteotome specification are led into 3shape software, so that the data can be accurately matched with the sizes of the groove and the blood conveying hole in the guide plate, the cutter head and the drill bit of the ultrasonic osteotome can be scanned by using a micro CT (computed tomography) without arranging devices such as a roller card positioner, the prepared PAOO surgical guide plate is simple in structure, the purpose of guiding the accurate implementation of surgery can be achieved, the difficulty in manufacturing the guide plate is reduced, the stability of the surgical guide plate is improved, and the PAOO surgical guide plate can be widely popularized clinically.

Therefore, the invention provides the following technical scheme:

in one aspect, the invention provides a preparation method of a 3D printed periodontal-assisted accelerated osteogenesis orthodontic treatment surgical guide, which is characterized by comprising the following steps:

step 1, acquiring oral scanning data and cone beam CT data of a patient, and segmenting the oral scanning data and the cone beam CT data by using mimics software;

step 2, importing mouth scanning data and cone beam CT data segmented by the mimics software into 3shape software, matching the mouth scanning data and the cone beam CT data by using the 3shape software to obtain a three-dimensional reconstructed dentition model, drawing a surgical area range by using a drawing tool in the 3shape software, and calibrating the position of a tooth root and the shape of an alveolar bone around the tooth to generate a first substrate;

step 3, importing the data of the ultrasonic osteotome head and the data of the ultrasonic osteotome drill bit into 3shape software;

step 4, measuring a first position and a second position on the first substrate by using a 3shape software measuring tool, drawing a cuboid-shaped longitudinal groove at the first position by using a drawing tool of the 3shape software, and drawing a line at the second position to obtain the tail end of the longitudinal groove; the first position is a position 2-3mm away from the crest of the alveolar ridge; the second position is a position 2-4mm away from the root of the cusp area of the tooth; setting the width of the longitudinal groove according to the data of the ultrasonic osteotome head;

step 5, drawing a cuboid-shaped transverse groove at the second position by using a drawing tool of 3shape software; setting the width of the transverse groove according to the data of the ultrasonic osteotome head;

step 6, measuring and calibrating a region with the thickness of cortical bone between the root of the tooth and the root surface being more than 1mm by using a measuring tool in 3shape software, and drawing a plurality of blood transportation holes in the region; setting the diameter of each blood transport hole according to the data of the ultrasonic osteotome drill bit;

step 7, importing data of the first substrate drawn with the longitudinal grooves, the transverse grooves and the blood transportation holes into 3-matic software, and shearing the longitudinal grooves, the transverse grooves and the parts needing to be removed in the blood transportation holes on the first substrate by using a 3-matic software shearing tool, wherein the tail ends of the longitudinal grooves are open;

and 8, processing the data obtained after the 3-matic software processing into an STL format, importing the data into 3D printing equipment for 3D printing, and obtaining the periodontal auxiliary accelerated osteogenesis orthodontic treatment surgical guide plate.

Further, the depth of the longitudinal groove is 1-2mm, and the width of the longitudinal groove is 1 mm.

Further, the depth of the transverse groove is 1-2mm, and the width of the transverse groove is 1 mm.

Further, after step 7 and before step 8, the method further comprises:

drawing a line on the crown of the crown in the operation area by using 3shape software to generate a second substrate with the thickness of 2 mm;

and performing Boolean operation on the second substrate and the first substrate by using 3-matic software to obtain a third substrate with a thickened crown.

Further, before processing the data obtained after the 3-matic software processing into the STL format, step 8 further includes:

and finishing the longitudinal grooves, the transverse grooves and the blood transportation holes through a 3-matic software trimming command, so that the lines of the longitudinal grooves, the transverse grooves and the blood transportation holes are smooth and smooth.

Further, the blood transporting holes are circular holes with the diameter of 1.5mm, the interval between the two blood transporting holes is at least 2mm, and the depth is 2 mm.

In another aspect, the invention also provides a 3D printed periodontal auxiliary accelerated osteogenesis orthodontic treatment surgical guide prepared by the preparation method of the 3D printed periodontal auxiliary accelerated osteogenesis orthodontic treatment surgical guide.

The invention has the advantages and positive effects that:

(1) according to the PAOO surgical guide plate, a tool bit and a drill bit of an ultrasonic osteotome are not required to be scanned by a micro CT, and the tool bit and the drill bit data in an ultrasonic osteotome specification are led into the software in the process of drawing by using 3shape software, so that the sizes of a groove and a blood circulation hole in the guide plate can be accurately matched, the manufacturing mode is simpler and more convenient, the manufacturing difficulty of the guide plate is reduced, most medical institutions can be manufactured and widely applied, and the PAOO surgical guide plate is higher in applicability. In addition, for the patient, the examination cost of using the micro CT in the operation process is reduced, so that the manufacturing cost of the guide plate is reduced.

(2) The PAOO surgical guide plate provided by the invention does not adopt devices such as a roller card positioner, is simple and convenient in design structure, only comprises the groove and the blood transportation hole, and the groove and the blood transportation hole can accurately indicate the position of an alveolar bone needing to be subjected to cortical bone incision and punching, so that important anatomical parts such as tooth roots are prevented from being injured, and the problems of cortical bone incision and too deep and too shallow blood transportation hole drilling are effectively avoided. The PAOO operation guide plate with the simple structure can achieve the purpose of accurately guiding the operation, is easy to prepare and can be widely popularized clinically.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a flow chart of a method for manufacturing a 3D printing PAOO guide plate according to an embodiment of the present invention;

FIG. 2 is a schematic structural view of a PAOO surgical guide in an embodiment of the present invention;

FIG. 3 is a side view of a PAOO surgical guide after flap-turning in an embodiment of the present invention;

FIG. 4 is a top view of a PAOO surgical guide in an embodiment of the present invention;

FIG. 5 is a 3D view of the longitudinal guide channel of the PAOO surgical guide in an embodiment of the present invention;

FIG. 6 is a 3D view of the lateral guide channel of a PAOO surgical guide in an embodiment of the present invention;

wherein, 1, the guide plate body; 2. a tooth surface retention plate; 3. alveolar bone position-retaining plates; 4. a blood transport hole; 5. a lateral guide groove; 6. a longitudinal guide groove; 7. surgical site (crown); 8. alveolar bone of operation area; 9. an orthodontic bracket.

Detailed Description

In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

As shown in fig. 1, it shows a flowchart of a method for preparing a 3D printed PAOO surgical guide in an embodiment of the present invention. This 3D prints PAOO operation baffle is for being applicable to PAOO operation baffle behind the flap, adopts 3D printing technique preparation to form, and the baffle body can laminate the maintenance in art district tooth position, combines toper bundle CT, mouth to sweep data design slot, circulation hole, instructs the position that alveolar bone need go the cortex of bone and open and punch, prevents to injure important anatomical parts such as root of a tooth, effectively avoids cortex of bone to open and beat the too dark and too shallow problem in circulation hole. The preparation method of the 3D printing PAOO surgical guide plate comprises the following steps:

step 1, oral scan data and cone beam CT data of a patient are obtained, and the oral scan data and the cone beam CT data are segmented by using mimics software.

Specifically, Cone Beam CT (Cone Beam CT, CBCT for short) equipment (e.g., kava Cone Beam multifunctional oral CT equipment) is used for shooting the mouth of a patient to obtain Cone Beam CT data of the patient, the Cone Beam CT data shot by the patient is converted into a DICOM format, and the DICOM format is adjusted to a jaw threshold value to reconstruct a jaw bone model (Cone Beam CT data); using a 3Shape intraoral scanner, the patient's mouth was scanned and a three-dimensional digital model of the dentition including part of the mucosa (oral scan data) was obtained.

CBCT is exclusive for the maxillofacial region, scans by using three-dimensional cone beam X-ray, and has good imaging quality for high resolution areas, such as tooth root canal system, mandible, mandibular nerve canal, and temporomandibular joint fine hard tissue structure.

The Mimics software is medical imaging software and can process two-dimensional image data (such as CT and MRI scanning data). The invention firstly uses the mimics software to segment the upper jaw, the lower jaw, the upper teeth and the lower teeth (the purpose of the step is to clearly see the position of the tooth root when in final trimming).

And 2, importing the mouth scanning data and the cone beam CT data segmented by the mimics software into 3shape software, matching the mouth scanning data and the cone beam CT data by using the 3shape software to obtain a three-dimensional reconstructed dentition model, drawing a surgical area range (including a dental crown and a surgical area around the dental root) by using a drawing tool in the 3shape software, and calibrating the position of the dental root and the shape of an alveolar bone around the dental root to generate a first substrate.

The 3shape software can be used for reconstructing a three-dimensional model after importing the mouth scanning data and the CT data, has the function of generating a guide plate, and can be used for designing the specific form of the guide plate. The PAOO surgical guide plate is designed by using the software, at present, the research on the design of the PAOO surgical guide plate by using the 3shape software is less in China, and most of the PAOO surgical guide plates are designed by using the software, so that the PAOO surgical guide plate has great potential in the aspect of preparing the PAOO surgical guide plate.

Because the mouth scan data and the cone beam CT data are imported into the 3shape software, images of tooth roots and alveolar bones are clearly visible, and on the basis, measurement and drawing of the grooves and the blood circulation holes can be carried out by using a measurement tool and a drawing tool in the 3shape software.

And 3, importing the ultrasonic osteotome head data and the ultrasonic osteotome drill bit data into 3shape software.

Step 4, measuring a first position on the first substrate by using a 3shape software measuring tool, and drawing a cuboid-shaped longitudinal groove at the first position by using a drawing tool of the 3shape software; the first position is a position 2-3mm away from the crest of the alveolar ridge; measuring a second position by using a 3shape software measuring tool, and drawing a line at the second position by using a drawing tool of the 3shape software to obtain the tail end of the longitudinal groove; the second position is 2-4mm of root of the dental cusp area; and setting the width of a longitudinal groove according to the data of the ultrasonic osteotome head.

And adjusting the 3D model to a sagittal position by using 3shape software, positioning a position with the thickness of the longitudinal groove of the substrate being 1mm and a position with the thickness of the longitudinal groove of the substrate being 2mm at the sagittal position by using a 3shape software measuring tool, and setting the depth of the longitudinal groove by referring to the positioned positions, preferably setting the width of the longitudinal groove to be 1mm by combining the data of the ultrasonic osteotome head.

Step 5, drawing a cuboid-shaped transverse groove at the second position by using a drawing tool of 3shape software; setting the width of a transverse groove according to the data of the ultrasonic osteotome head;

the depth of the transverse grooves is set to about 1-2mm, and preferably, the width is set to 1mm, using the same method as described above for drawing the longitudinal grooves.

Step 6, measuring and calibrating a region with the thickness of cortical bone between the root of the tooth and the root surface being more than 1mm by using a measuring tool in 3shape software, and drawing a plurality of blood transportation holes in the region; setting the diameter of each blood transport hole according to the data of the ultrasonic osteotome drill bit;

specifically, circular blood transport holes with the diameter of 1.5mm are drawn in the areas, the hole-to-hole interval is set to be at least 2mm, the depth is set to be about 2mm, and important anatomical parts which are easy to cause iatrogenic injury, such as tooth roots, need to be avoided by setting the blood transport holes.

And 7, importing the data of the first substrate drawn with the longitudinal grooves, the transverse grooves and the blood transportation holes into 3-matic software, and shearing the longitudinal grooves, the transverse grooves and the parts needing to be removed in the blood transportation holes on the first substrate by using a 3-matic software shearing tool, wherein the tail ends of the longitudinal grooves are open.

The 3-matic software is a three-dimensional Analytical Model (Analytical Model) which can convert a three-dimensional medical Model from a triangular patch Model to a NURBS curved surface, namely, an STL format is converted into a CAD format, and then other CAD software is introduced for subsequent design. The invention mainly uses 3-matic software to trim, and the first substrate (namely the initial guide plate) can be transparentized by using the 3-matic software, so that the images of the tooth root and the alveolar bone of the operation area can be seen. After being cut by 3-matic software, the longitudinal grooves, the transverse grooves and the blood transportation holes are hollow so as to guide the surgical incision and drilling positions.

And 8, drawing lines on the crown side (the area needing thickening) of the crown of the operated area again by using 3shape software to generate a second substrate with the thickness of 2mm, and performing Boolean operation on the second substrate and the first substrate by using 3-matic software to obtain the surgical guide plate with the thickened crown side.

Step 8 is an optimal step, and the operation guide plate with the thickened crown part can be obtained through the step, so that the upper dentition and the lower dentition are occluded at the thickened part of the crown part of the guide plate in the operation process, and a patient does not need to open the mouth by himself, so that the comfort degree in the operation is improved, and the pain of the patient is relieved. In a specific implementation, the step is not executed, and 3D printing is directly carried out on the basis of the first substrate, so that the periodontal auxiliary accelerated osteogenesis orthodontic treatment surgical guide plate is obtained.

And 9, finishing the longitudinal grooves, the transverse grooves and the blood circulation holes through a 3-matic software trimming command to enable lines of the grooves to be smooth and round, so that the subsequent 3D printing manufacturing is facilitated.

And step 10, processing the data obtained in the step 9 into an STL format, and importing the data into a 3D printing device (Form2) for 3D printing to obtain the periodontal auxiliary accelerated osteogenesis orthodontic treatment surgical guide plate.

The PAOO surgical guide plate in the embodiment does not need to use a micro CT scanning ultrasonic osteotome head and a drill bit, and can accurately match the sizes of the grooves and the blood circulation holes in the guide plate by using the data of the head and the drill bit in the ultrasonic osteotome specification to software in the process of drawing by using 3shape software, so that the manufacturing mode is simpler and more convenient, the manufacturing difficulty and the manufacturing cost of the guide plate are reduced, most medical institutions can prepare and widely apply the guide plate, and the applicability is stronger.

The PAOO operation guide plate in the embodiment does not adopt devices such as a roller card positioner, is simple and convenient in design structure, only comprises the groove and the blood transport hole, and the groove and the blood transport hole can accurately indicate the position of the alveolar bone needing cortical bone incision and punching, so that important anatomical parts such as tooth roots are prevented from being injured, and the problems of cortical bone incision and too deep and too shallow of the blood transport hole are effectively avoided. The PAOO operation guide plate with the simple structure can achieve the purpose of accurately guiding the operation, is easy to prepare and can be widely popularized clinically.

As shown in fig. 2-4, which illustrate the structure of a 3D printed PAOO surgical guide plate prepared based on the above-described preparation method. This 3D prints PAOO operation baffle includes:

the guide plate body 1 is printed in a 3D mode;

wherein, the guide plate body 1 comprises a tooth surface retaining plate 2 which can be attached and fixed on a tooth position 7 of an operation area and an alveolar bone retaining plate 3 which is opposite to the cortical bone of an alveolar bone 8 of the operation area;

the tooth surface retention plate 2 is thickened by about 2mm, a dental crown binding surface which is bound with a dental crown in an operation area and an occlusal surface which corresponds to the jaw teeth are arranged on the tooth surface retention plate, and the tooth surface retention device 2 can avoid the orthodontic bracket 9 on the labial and buccal surfaces.

The alveolar bone fixing plate 3 extends to the root of the apical area on the buccal side by 2mm-4 mm.

As shown in fig. 5, the alveolar bone fixation plate 3 is provided with a longitudinal guide groove 6 for guiding longitudinal cutting of cortical bone of the alveolar bone between roots; the longitudinal guide groove 6 is arranged at the position 2-3mm away from the crest of the alveolar bone in an operation area, and preferably, the longitudinal guide groove is arranged at the position 2mm away from the crest of the alveolar bone in the operation area. The longitudinal grooves are formed in the cortical bone corresponding area of the alveolar bone between the tooth roots, so that the ultrasonic osteotome can be accurately guided to perform longitudinal incision for cutting the cortical bone between the tooth roots, the depth and the direction of the ultrasonic osteotome can be controlled, the operation is simpler, the wound of the made longitudinal incision is small, compared with a conventional incision mode in which multiple drilling needs to be performed, the cortical bone incision efficiency can be increased through the longitudinal incision, and the operation speed can be greatly increased; and the tail end of the longitudinal guide groove is opened, so that the ultrasonic osteotome and the high-speed mobile phone have the functions of water drainage and heat dissipation.

As shown in fig. 6, the alveolar bone fixation plate 3 is further provided with a transverse guide groove 5 for guiding the transverse incision of cortical bone of the apical area of the tooth; the transverse guide groove 5 is arranged at the root of the apical area of the tooth root at 2mm-4 mm. Preferably, a transverse guide groove is arranged 2mm away from the root of the apical area of the tooth, and can accurately guide the ultrasonic osteotome to perform a transverse incision for cutting the cortical bone at the root of the surgical area. Because the apical area art district is narrow, the degree of difficulty of punching is very big, and the design of transverse incision compares the design of punching and implements more easily, and compares the conventional mode of cutting that need carry out a lot of drilling, can increase bone cortex through transverse incision and cut efficiency, can greatly promote operation speed.

The alveolar bone retention plate 3 is also provided with a plurality of blood transportation holes 4 which are established corresponding to the cortical bone on the surface of the tooth root of the operation area; the blood transport hole 4 can guide the ultrasonic osteotome to establish a blood transport hole in the area to prepare for bone augmentation grafting later. In addition, the blood transportation hole 4 can realize the positioning of the drilling depth and direction in the drilling process, prevent the injuries of tooth roots, nerves and important anatomical structures caused by the cutting of cortical bone and the over-deep or directional deviation of the drilling, reduce the incidence of postoperative complications and further improve the safety of operations.

The PAOO operation guide plate in the embodiment has the advantages that the longitudinal grooves are formed in the cortical bone corresponding area of the alveolar bone between tooth roots, the ultrasonic osteotome is accurately guided to perform longitudinal incision for incising the cortical bone between the tooth roots, and the depth and direction of the ultrasonic osteotome can be controlled, so that the operation of the longitudinal incision is simpler, compared with the prior art that the guide holes are formed in the cortical bone corresponding area of the alveolar bone, the scheme of incising the cortical bone is realized through multiple drilling, the cortical bone incising efficiency can be increased through the longitudinal incisions, and the operation speed can be greatly increased; and the tail end of the longitudinal guide groove is opened, so that the ultrasonic osteotome and the high-speed mobile phone have the functions of water drainage and heat dissipation.

In the PAOO surgical guide plate in the embodiment, the transverse guide groove is arranged at 2mm of the root of the apical area, the ultrasonic bone knife is accurately guided to perform a transverse incision for cutting the cortical bone at the root apex, the cortex of the bone of the root square can be loosened, the local accelerated repair phenomenon of the alveolar bone of the root square is accelerated, and the tooth movement is promoted. In addition, the tip area art district is narrow, and the design of transverse incision is more convenient, and the efficiency is cut open to multiplicable cortex of bone, promotes operation speed.

In the PAOO surgical guide plate in the embodiment, a plurality of blood transport holes are formed in the cortical bone corresponding to the root surface of the surgical area, and the ultrasonic osteotome is guided to establish the blood transport holes in the area so as to prepare for bone augmentation bone grafting. In addition, the blood transportation hole can realize the positioning of the drilling depth and direction in the drilling process, prevent the injuries of tooth roots, nerves and important anatomical structures caused by the cutting of cortical bone and the over-deep or directional deviation of the drilling, reduce the incidence rate of postoperative complications and further improve the safety of operations.

The PAOO operation guide plate in the embodiment thickens the crown retention part in the operation area and designs the occlusal surface corresponding to the jaw teeth, so that the upper and lower tooth rows are occluded at the crown retention part of the guide plate in the operation process, and a patient does not need to open the mouth by himself in the operation process, thereby improving the comfort degree in the operation and relieving the pain of the patient.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.