Digitalized jaw cyst decompression device and preparation method thereof

Abstract

This invention discloses a digital jawbone cyst decompression device and its preparation method, belonging to the field of medical device technology. This invention solves the problems of traditional decompression devices, such as inability to be personalized, poor aesthetics, lack of space preservation function, easy displacement, and insufficient strength. The device is formed by bonding a personalized medical titanium alloy 3D-printed drainage titanium tube to a resin restorative retainer. Based on the patient's CBCT and intraoral scan fusion data, it precisely matches the cyst cavity, decompression window, and dental anatomy, combining cyst drainage, space preservation, aesthetic restoration, and stable retention functions. The preparation method includes data acquisition and fusion, virtual design, separate 3D printing, bonding assembly, and clinical wearing. This device has high mechanical strength, is easy to position, integrates treatment and restoration functions, facilitates postoperative irrigation, maintenance, and digital efficacy evaluation, effectively improving treatment results and patient compliance, and providing convenience for subsequent implant restoration.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and in particular to a digital jawbone cyst decompression device and its preparation method. Background Technology

[0002] Jawbone cysts are pathological cystic cavities that occur within the jawbone, consisting of a fibrous connective tissue wall and an inner epithelial lining, and their contents are mostly cystic fluid. Decompression fenestration has become the preferred method for treating large jawbone cysts. The core principle of this treatment is to surgically create a decompression window on the cyst surface that communicates with the oral cavity, allowing the cystic fluid to drain out. This eliminates negative or positive pressure within the cyst cavity, promoting the ingrowth of surrounding osteoblasts and achieving physiological bone regeneration and healing of the cyst cavity. During this process, the decompression device serves to drain the cystic fluid and facilitate postoperative irrigation. It is also necessary to maintain the patency of the decompression window to prevent soft tissue ingrowth or premature closure of the window, and to minimize the impact on the patient's daily life.

[0003] Currently common decompression devices include resin plugs, custom-made braces, and silicone tubes. These traditional devices are mostly prefabricated and have fixed shapes, and their shape, size, and materials cannot precisely match the individualized bone window morphology and dental anatomy that develops post-surgery. Furthermore, traditional devices offer poor patient experience and aesthetics; the exposed portion is large and unsightly, and if located in the anterior region, it can severely affect facial aesthetics, causing long-term social and psychological burden on patients. In addition, traditional decompression devices cannot maintain space; after a lengthy decompression process, the edentulous space may not be sufficient for subsequent implant restorations, requiring additional orthodontic traction treatment. Summary of the Invention

[0004] The purpose of this invention is to solve the following problems existing in the prior art: 1. Typical cyst decompression devices are mass-produced and cannot be customized according to the shape of an individual's cyst. Their orientation is also fixed, which often makes it difficult to accurately place them into the cyst cavity. This requires a lot of time for adjustment and results in a long operation time.

[0005] 2. Typical cyst decompression devices are not aesthetically pleasing, which can have a psychological impact on patients.

[0006] 3. Conventional cyst decompression devices cannot maintain the edentulous space after use. After the treatment cycle is completed, the edentulous space is reduced, which is not conducive to subsequent implant restoration treatment.

[0007] 4. Common cyst decompression devices are made of soft materials that cannot meet the long treatment cycle required for cyst treatment, and once damaged, they are difficult to remake or replace.

[0008] 5. Ordinary cyst decompression devices rely solely on soft tissue healing for fixation, making them highly susceptible to displacement.

[0009] This invention provides a digital jawbone cyst decompression device and its preparation method.

[0010] The technical solution adopted in this invention is: A digital jaw cyst decompression device includes a titanium tube, a resin bonding part, and a resin prosthesis. The titanium tube is integrated into the middle of the resin prosthesis, and a lingual opening is provided at the other end of the titanium tube. The titanium tube is designed based on the fusion data model of the patient's maxillofacial CBCT data and intraoral scan data. The shape of the titanium tube matches the shape of the jaw cyst cavity and decompression window. One end of the titanium tube extends into the depth of the cyst cavity. The resin restoration is a resin bridge restoration, which is designed based on the patient's dentition data and has a lingual wing-shaped retention structure. The titanium tube and the resin repair body are fixedly connected by a resin adhesive part, which is cured and molded using a dual-curing adhesive DMG.

[0011] Furthermore, the titanium tube is a one-piece component formed by metal 3D printing of medical-grade titanium alloy powder, and the diameter, curvature, and side hole layout of the titanium tube are matched with the morphology of the cyst.

[0012] Furthermore, the proximal morphology, occlusal morphology, and gingival margin morphology of the resin restoration match the morphology of the natural teeth at the corresponding missing tooth positions of the patient, and the lingual wing-shaped retention structure of the resin restoration fits against the lingual surface of the adjacent teeth.

[0013] This invention also provides a method for preparing a digital jaw cyst decompression device, comprising the following steps: 1) The patient's maxillofacial region was scanned using cone-beam CT to obtain CBCT imaging data; an intraoral scanner was used to scan the surgical area and adjacent dentition to obtain intraoral optical three-dimensional data of crown morphology, gingival contour, and occlusal relationship. 2) Register CBCT imaging data with intraoral optical 3D data through common anatomical landmarks to generate a 3D virtual model that integrates the morphology of the jawbone, teeth, and soft tissues; 3) Define the cyst boundaries on the three-dimensional virtual model and determine the location and shape of the bone fenestration; 4) On the three-dimensional virtual model, design a titanium tube that communicates with the decompression window and the deep cavity, as well as a resin restoration that matches the missing tooth position, and set a lingual opening on the wall of the titanium tube. 5) Import the 3D model data of the titanium tube into a metal 3D printer, use medical-grade titanium alloy powder for printing, and perform the following processes on the printed parts in sequence: support removal, sandblasting, cleaning, polishing, and disinfection. 6) Import the 3D model data of the resin restoration into a dental light-curing 3D printer, print using medical resin material, and clean and polish the printed parts. 7) The dual-curing adhesive DMG is applied to the connection between the titanium tube and the resin repair body to form a resin bonding part (2). After curing, an integrated pressure reducing device is obtained. 8) A personalized surgical guide is used to locate the bone window, and the remaining tooth roots in the surgical area are removed and the flap is raised under anesthesia. The bone window is completed using a high-speed handpiece. 9) Insert the decompression device into the patient's mouth for a trial fitting. After confirming that it is in place, use Fuji I to adjust the occlusion and polish the resin restoration to complete the device retention.

[0014] Furthermore, In step 4), the diameter, curvature, and side hole layout of the titanium tube are adjusted according to the three-dimensional morphology of the cyst.

[0015] The procedure also includes the following steps: daily flushing of the bladder cavity with saline solution via a titanium tube; monthly follow-up visits to collect CBCT data and check the device's retention and occlusion status.

[0016] After follow-up CBCT data showed that the cyst had shrunk and the surrounding bone wall had thickened, a cyst curettage procedure was performed. Compared with the prior art, the beneficial effects of the present invention are:

[0017] 1. It deeply integrates treatment and repair functions, breaking through the limitations of traditional single drainage tubes in terms of aesthetics and strength.

[0018] 2. This device is based on the fusion of intraoral scan data and CBCT image data, and can accurately adapt to the anatomical structure of different dental arch segments.

[0019] 3. The external crown material of this device is resin, which is readily available and inexpensive. The internal titanium drainage tube has sufficient strength, ensuring the smooth implementation of the drainage function while reducing the price.

[0020] 4. Compared with traditional drainage devices, it has the function of maintaining the space between missing teeth, which is more beneficial to subsequent treatment. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in this invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0022] Figure 1This is a front view of the device of the present invention; Figure 2 This is a reverse view of the device of the present invention; Figure 3 This is a diagram illustrating the usage steps and effects of the present invention; Figure 4 This is a schematic diagram of the software design of the present invention.

[0023] 1. Titanium tube, 2. Resin bonding part, 3. Resin repair body, 4. Opening on the tongue side of the titanium tube. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0025] This embodiment provides a method for preparing a digital jaw cyst decompression device, the method comprising: 1. Data collection: Collect patient dentition information and imaging information; 2. Digital modeling to virtually reconstruct the patient's oral cavity structure; 3. Device design: Based on the collected data and virtual oral cavity structure, a personalized digital drainage device is designed.

[0026] 4. Device fabrication: The internal drainage titanium tube and the external resin Maryland bridge were fabricated using 3D printing and then bonded together.

[0027] according to Figure 3 The specific steps and methods include: Step 1. Maxillofacial imaging data acquisition: The patient's maxillofacial region is scanned using cone-beam CT.

[0028] Step 2. Intraoral optical data acquisition: Use an intraoral scanner to scan the crown morphology, gingival contour, and occlusal relationship of the patient's surgical area and adjacent dentition to obtain high-precision three-dimensional surface data.

[0029] Step 3. Data registration and fusion: In professional software (such as the exo platform), CBCT data and intraoral scan data are accurately registered through common anatomical landmarks to generate a fused three-dimensional virtual model that simultaneously contains accurate skeletal morphology and fine dental soft tissue morphology.

[0030] Step 4. Virtual design of decompression window: Based on the anatomical location of the cyst, the cyst boundary is defined on the 3D model, and the location and shape of the bone opening are planned accordingly.

[0031] Step 5. Internal Drainage Titanium Tube Design: Initially determine the space occupied by the device in the virtual edentulous area, ensuring its restoration position aligns with the bone window connection path. Starting from the planned window area, design a personalized drainage tube extending deep into the cyst cavity. Optimize drainage efficiency by adjusting the tube diameter, curvature, and side hole layout; this part is determined individually based on the cyst morphology.

[0032] Step 6. External resin restoration design: Based on the position of the missing tooth, design the crown or bridge restoration on the virtual model to accurately restore its proximal contact, occlusion and gingival margin morphology.

[0033] Step 7. Internal Titanium Tube Manufacturing: Import the designed 3D model data of the drainage titanium tube into a metal 3D printer and print using medical-grade titanium alloy powder. After printing, the tube undergoes support removal, sandblasting, cleaning, polishing, and sterilization.

[0034] Step 8: External restoration fabrication: Import the resin restoration model data into a dental-specific light-curing 3D printer, print using medical-grade resin material, and finally clean and polish.

[0035] Step 9: Bond the inner titanium tube to the outer restoration using dual-curing adhesive DMG and cure.

[0036] Step 10: Perform decompression surgery: Use a personalized surgical guide to precisely locate and create a bone window inside the patient's mouth.

[0037] Step 11: Clinical Surgery and Device Placement: With the patient's consent, under articaine anesthesia, the remaining tooth root was extracted, the flap was raised, and a precise window was created using a high-speed handpiece. The cyst decompression device was trial-fitted, and after confirming successful placement, the resin restoration portion of the device was adjusted and polished using a Fujifilm I instrument. This continued until the patient was completely comfortable, and the drainage and irrigation functions were verified.

[0038] Step 12: Postoperative Follow-up and Maintenance: During the decompression cycle, the patient needs to flush the cyst cavity daily with normal saline through a titanium tube. A follow-up visit is required monthly to check changes in cyst volume, device fixation, occlusion, and drainage patency.

[0039] Step 13: If the follow-up examination shows that the cyst volume has been significantly reduced and the surrounding bone wall has been sufficiently thickened, the decompression treatment can be considered successful, and cyst curettage surgery can be performed.

[0040] The working principle of this invention is: 1. Achieving precise anatomical fit, perfectly conforming to the patient's personalized model, the device can accurately reach the cyst cavity with minimal adjustments, and placement is simple. In traditional decompression therapy, the drainage path relies on intraoperative judgment, and the shape and position of the device are highly arbitrary. This invention, through preoperative virtual surgical simulation and device design on the patient's personal 3D model, can pre-plan the optimal bone window position, the 3D direction and angle of the drainage tube, transforming experience-based operations into a predictable and reproducible standardized process.

[0041] 2. The internal titanium tube structure increases the biocompatibility of the device and improves its mechanical properties compared to the previous rubber tube, making it more suitable for the long process of treating jaw cysts, reducing immune and inflammatory responses, and effectively reducing the invasive operation of changing decompression devices.

[0042] 3. The external resin restoration has a natural color and lifelike shape, greatly improving the aesthetic shortcomings of the original cyst decompression device and boosting the patient's confidence. The two lingual wing-like structures increase the bonding area, allowing the cyst decompression device to be fixed without affecting aesthetics or damaging natural teeth.

[0043] 4. It creatively integrates treatment and restoration functions. In the long-term complex oral environment, it can provide mechanical support and treatment through the internal rigid titanium tube, and can also provide aesthetic restoration through the resin restoration. At the same time, the wing-shaped retention design of this device increases the bonding area to prevent the device from falling off. It achieves long-term biomechanical balance that cannot be achieved by traditional single materials or simple combination devices, and significantly improves the aesthetics, comfort, safety and patient compliance of the treatment.

[0044] 5. The invention establishes a complete digital record from data acquisition to final placement. During follow-up visits, CBCT data before and after device placement can be compared to quantitatively assess changes in cyst volume and bone regeneration within the software, making the efficacy assessment more objective. If drainage or retention issues arise, the original design data can be reviewed for targeted analysis, rather than relying solely on experience for adjustments. After treatment, this digital model can be directly used as the design basis for permanent implants or prostheses, achieving a seamless digital transition from temporary treatment devices to permanent prostheses, improving overall treatment efficiency and precision.

[0045] 6. It can maintain the gap between missing teeth to facilitate subsequent implant restoration treatment, eliminating the need for orthodontic traction.

[0046] Jawbone cysts are common and in high demand. This decompression device offers precise anatomical fitting, accurately reaching the cyst cavity and simplifying placement. Compared to conventional decompression devices, its internal titanium tube structure is biomechanically optimized, improving treatment outcomes. It creatively integrates treatment and restorative functions, significantly enhancing aesthetics, comfort, safety, and patient compliance. Unlike existing jawbone cyst decompression devices, it is less prone to dislodgement. It maintains edentulous space for subsequent implant restoration. Given the lengthy decompression process, if the device wears out, it can be rapidly remanufactured using existing digital data, solving the problem of component replacement during long-term treatment.

[0047] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A digital jawbone cyst decompression device, characterized in that, It includes a titanium tube (1), a resin bonding part (2) and a resin repair body (3), wherein the titanium tube (1) is integrated into the middle part of the resin repair body (3), and a titanium tube tongue opening (4) is provided at the other end of the titanium tube (1). The titanium tube (1) is designed based on the fusion data modeling of the patient's maxillofacial CBCT data and intraoral scan data. The shape of the titanium tube (1) matches the shape of the jaw cyst cavity and decompression window. One end of the titanium tube (1) extends into the deep part of the cyst cavity. The resin restoration (3) is a resin bridge restoration. The resin restoration (3) is designed based on the patient's dentition data and is provided with a lingual wing-shaped retention structure. The titanium tube (1) and the resin repair body (3) are fixedly connected by a resin bonding part (2), which is cured and molded using a dual-curing adhesive DMG.

2. The digital jawbone cyst decompression device according to claim 1, characterized in that, The titanium tube (1) is a one-piece component formed by metal 3D printing of medical-grade titanium alloy powder. The diameter, curvature and side hole layout of the titanium tube (1) are matched with the morphology of the cyst.

3. The digital jawbone cyst decompression device according to claim 1, characterized in that, The proximal morphology, occlusal morphology, and gingival margin morphology of the resin restoration (3) are matched with the morphology of the natural teeth corresponding to the missing teeth of the patient, and the lingual wing-shaped retention structure of the resin restoration (3) is in contact with the lingual surface of the adjacent teeth.

4. The method for preparing a digital jaw cyst decompression device according to any one of claims 1-3, characterized in that, Includes the following steps: 1) The patient's maxillofacial region was scanned using cone-beam CT to obtain CBCT imaging data; an intraoral scanner was used to scan the surgical area and adjacent dentition to obtain intraoral optical three-dimensional data of crown morphology, gingival contour, and occlusal relationship. 2) Register CBCT imaging data with intraoral optical 3D data through common anatomical landmarks to generate a 3D virtual model that integrates the morphology of the jawbone, teeth, and soft tissues; 3) Define the cyst boundaries on the three-dimensional virtual model and determine the location and shape of the bone fenestration; 4) On the three-dimensional virtual model, a titanium tube (1) connected to the decompression window and the deep cavity is designed, as well as a resin restoration (3) matching the missing tooth position. A lingual opening (4) of the titanium tube (1) is set on the tube wall. 5) Import the three-dimensional model data of the titanium tube (1) into the metal 3D printer, use medical-grade titanium alloy powder for printing, and perform support removal, sandblasting, cleaning, polishing and disinfection treatment on the printed parts in sequence. 6) Import the three-dimensional model data of the resin restoration (3) into the dental light-curing 3D printer, use medical resin material for printing, and clean and polish the printed parts. 7) Apply dual-curing adhesive DMG to the connection between the titanium tube (1) and the resin repair body (3) to form a resin bonding part (2), and after curing, an integrated pressure reducing device is obtained. 8) A personalized surgical guide is used to locate the bone window, and the remaining tooth roots in the surgical area are removed and the flap is raised under anesthesia. The bone window is completed using a high-speed handpiece. 9) Place the decompression device into the patient's mouth for trial wear. After confirming that it is in place, use Fuji I to adjust the occlusion and polish the resin restoration (3) to complete the device fixation.

5. The preparation method according to claim 4, characterized in that, In step 4), the diameter, curvature and side hole layout of the titanium tube (1) are adjusted according to the three-dimensional morphology of the cyst.

6. The preparation method according to claim 4, characterized in that, It also includes the following steps: The patient was flushed daily with saline solution injected into the cyst cavity through a titanium tube (1); the patient was re-examined monthly to collect CBCT data and check the device's retention and occlusion status.

7. The preparation method according to claim 6, characterized in that, After follow-up CBCT data showed that the cyst had shrunk and the surrounding bone wall had thickened, a cyst curettage procedure was performed.

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