A personalized Gothic arch assembly and a digital method for determining jaw position relationships in dental implant restoration.
By using CAD/CAM designed rigid connection personalized Gothic bow components in dental implant restorations, combined with 3D printing technology and electronic face bows, the problem of inaccurate jaw relationship caused by occlusal repositioning is solved, achieving more precise jaw relationship recording and restoration design.
Patent Information
- Application Number
- CN202610196527.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2026-02-11
- Publication Date
- 2026-05-26
AI Technical Summary
In existing technologies, the personalized Gothic arch in dental implant restoration is prone to movement of the occlusal bracket during mandibular protrusion and lateral movements, resulting in inaccurate recording of jaw position and mandibular movement trajectory. Furthermore, it has high operational requirements, high costs, and limited adaptability.
The rigid connection personalized Gothic bow assembly, designed using CAD/CAM and manufactured using 3D printing, can be screwed onto the implant SRA abutment. It uses high-strength resin material and tracing needles of different heights, combined with an electronic face bow to record the mandibular movement trajectory, ensuring the device remains stable during movement.
It enables accurate recording and transfer of mandibular movement trajectories, improves the accuracy of determining jaw position relationships, reduces clinical adjustment time, and enhances patient comfort and the suitability of prostheses.
Smart Images
Figure CN122075175A_ABST
Abstract
Description
Technical Field
[0001] This invention belongs to the field of medical device technology, specifically relating to a personalized Gothic arch assembly for dental implant restoration and a digital method for determining jaw position relationships. Background Technology
[0002] With the acceleration of population aging and the high incidence of oral diseases such as dental caries and periodontal disease, edentulous patients are becoming increasingly common in clinical practice. However, the comfort and chewing efficiency of using removable dentures or implant overdentures do not meet satisfactory standards. The demand for full-mouth implant fixed denture restoration, which is more effective in improving patients' quality of life, is gradually increasing. Full-mouth implant fixed denture or overdenture restoration has become a treatment option for more and more patients with missing teeth.
[0003] To obtain a suitable and aesthetically pleasing implant-supported superstructure for chewing, accurate impression taking and precise recording and transfer of jaw position are crucial for treatment outcomes. Edentulous patients lack the occlusal support of natural teeth, resulting in unstable occlusion and complex determination and transfer of jaw position. This is especially true for edentulous implant patients, who often experience a 6-9 month period of tooth loss after extraction healing and implant osseointegration. This period can lead to adaptive changes in masticatory muscle function, fading of occlusal memory, functional incoordination, and even changes in condylar morphology, further destabilizing the jaw position. Compared to the less reliable swallowing-biting method and the guided method heavily influenced by the surgeon's experience, the centric relation obtained through Gothic arch tracing offers higher repeatability, stability, and accuracy. However, removable dental arches made using traditional methods rely on mucosal support and protective caps. Due to the elasticity of the mucosa, the dental arches are prone to movement when the mandible moves forward or laterally. Furthermore, they are affected by the deformation of the material itself. In particular, the poor dimensional stability of wax can lead to inaccurate recording of jaw position and mandibular movement trajectory, thus affecting the accuracy of restoration fabrication.
[0004] Personalized Gothic arches are customized devices used in the field of dental implant restoration to accurately determine the centric relation of the mandible. They locate the ideal occlusal position by recording the mandibular movement trajectory, making them particularly suitable for complete dentures, occlusal reconstruction, and complex restorative cases. The core principle involves using a tracing stylus to draw a "duck's foot" shaped trajectory on a tracing plate, with the apex corresponding to the physiological retrusion of the mandible (centric relation), thus providing a scientific jaw position reference for the restoration. In current technology, the design of personalized Gothic arches is based on customized patient anatomical features. Digital technologies (such as 3D printing) are used to create personalized trays and miniature devices to accommodate special needs, such as edentulous children or patients with asymmetrical jaws. For example, the team at West China Hospital of Stomatology, Sichuan University, customized a mini-personalized Gothic arch for edentulous children, combining digital scanning to establish a jawbone spatial coordinate system, achieving lifelong prosthesis fitting and tracking. This customized design improves device stability, reduces patient discomfort, and enhances the accuracy of jaw position recording. Other studies focus on the digital process of manufacturing personalized Gothic arches for complete denture restoration. They use CAD / CAM to design and 3D print custom trays that are combined with personalized Gothic arches, and create waxed occlusal ridges to determine and transfer jaw position records. Based on this, they design and 3D print occlusal edges of different thicknesses that can be assembled and fixed to the trays.
[0005] In summary, while the personalized Gothic bow technique offers significant advantages in clinical practice, particularly for edentulous patients, those with malocclusion and joint symptoms, or those with complex restorations, studies have shown that precise centric positioning can improve mastication efficiency by over 60%, occlusal stability by over 85%, and reduce joint discomfort. Digital integration (such as facebow transfer and cone-beam computed tomography) further enhances the accuracy of virtual restoration planning. However, its limitations primarily lie in the high operational requirements, necessitating specialized equipment and skilled operators, the high cost of personalized devices, and the need for further evaluation of its clinical suitability for patients with macroglossia or limited intermaxillary distance. Summary of the Invention
[0006] To overcome the problems in existing dental implant restorations, such as the tendency for the occlusal bracket to shift during mandibular protrusion and lateral movements, and the inaccurate recording of jaw position and mandibular movement trajectories due to material deformation affecting dimensional stability, the main objective of this invention is to provide a personalized Gothic arch assembly for dental implant restorations. This personalized Gothic arch, designed using CAD / CAM and fabricated using 3D printing, is rigidly connected and screw-fixed to the implant's SRA abutment. During the determination of jaw position, resin recording needles of different heights can determine the vertical distance. This Gothic arch remains stable at all times, accurately recording the trajectory of mandibular movements. Combined with an electronic face bow, it can quickly and accurately determine the patient's centric relationship and simultaneously record the patient's dynamic mandibular movement trajectory, assisting in more precise prosthesis design.
[0007] Another objective of this invention is to provide a digital jaw relationship determination method based on the personalized Gothic arch component for dental implant restoration, which is used to transfer the maxillary-mandibular relationship in edentulous full-mouth implant restoration, improve the clinical fit of the prosthesis, reduce clinical adjustment time, and enhance patient comfort.
[0008] To achieve the above objectives, the present invention adopts the following technical solution:
[0009] In a first aspect, the present invention provides a personalized Gothic arch assembly for dental implant restoration, comprising: a mandibular tracing needle fixation bracket, a plurality of tracing needles of different heights, a maxillary Gothic arch tracing plate, and a plurality of fixing screws; the mandibular tracing needle fixation bracket includes two structures: a "Y"-shaped tracing needle positioning bracket and a personalized implant fixation bracket; the tracing needles are fitted into the groove in the center of the mandibular tracing needle fixation bracket through a shaft hole fitting structure; the maxillary Gothic arch tracing plate is "U"-shaped and adapted to the maxillary dental arch;
[0010] Both the mandibular tracing needle fixation bracket and the maxillary Gothic arch tracing plate are pre-reserved with screw channels for precise alignment with the implant, and are matched with the fixation screws.
[0011] The mandibular tracing needle fixation bracket, tracing needle, and maxillary Gothic arch tracing plate are all made of high-strength resin material.
[0012] Preferably, the maxillary Gothic arch tracing plate is made of high-strength polymethyl methacrylate (PMMA) material, manufactured using 3D printing technology, and is U-shaped with attachments that can be fixed to the implant SRA abutment by screws, allowing for personalized manufacturing to suit the patient's dental arch shape.
[0013] Preferably, the mandibular tracing needle fixation bracket is made of high-strength polymethyl methacrylate material, manufactured using 3D printing technology, and has a three-column supported groove structure with a U-shaped rod attachment that can be fixed to the implant SRA abutment by screws, allowing for personalized manufacturing to suit the patient's dental arch morphology.
[0014] Preferably, the tracing needle is made of high-strength polymethyl methacrylate (PMMA) and manufactured using 3D printing technology. Its height can be made in five different sizes: 7mm, 8mm, 9mm, 10mm, and 11mm, depending on requirements. It is fixed or removed from the mandibular tracing needle fixation bracket via an insertion and removal method. In some specific embodiments, it can be adjusted to suit the patient's individualized occlusal vertical distance.
[0015] Preferably, the fixing screws are titanium screws that match the SRA abutment of the implant, which fix the personalized Gothic bow for dental implant restoration to the SRA abutment as a whole, so as to achieve a rigid connection and ensure retention and stability.
[0016] A second aspect of the present invention provides the application of the personalized Gothic bow assembly for dental implant restoration in the determination of digital jaw position relationships during dental implant restoration.
[0017] A third aspect of the present invention provides a method for determining the digital jaw position relationship based on the personalized Gothic arch assembly for dental implant restoration, comprising the following steps:
[0018] S1. Digital impressions are obtained by scanning both intraorally and extraorally of the subject. CAD / CAM is used to design and 3D print personalized Gothic bow components for dental implant restoration.
[0019] S2. Use fixing screws to fix the mandibular tracing needle fixing bracket and the maxillary Gothic arch tracing plate to the mandibular and maxillary SRA abutments.
[0020] S3. Select tracing needles of different heights according to the patient's vertical distance, fix them to the mandibular tracing needle fixation bracket, and use a turbine to perform fine adjustment to determine the vertical relationship;
[0021] S4. Spray tracing powder onto the surface of the maxillary Gothic arch tracing board. The patient performs mandibular protrusion and lateral movements. The tracing needle draws a "duck's foot" shaped trajectory on the tracing board. The centric relation is accurately marked at the intersection of the trajectory. At the same time, the mandibular movement trajectory is recorded in conjunction with an electronic facebow. Silicone rubber is injected into the occlusal space to complete the occlusal registration.
[0022] S5. Remove the personalized Gothic arch assembly for dental implant restoration, and install the fully adjustable articulator based on the occlusal record and electronic facebow data to complete the determination of centric relation.
[0023] Preferably, in step S1, the subject is an edentulous patient who has completed the first and second stages of implant surgery and needs implant-supported maxillary restoration.
[0024] Preferably, in step S1, the digital impression taking process includes: fixing the digital impression intraoral scanning rod to the SRA abutment of the patient's intraoral implant; after confirming the stability and position of the scanning rod, using an intraoral and extraoral scanner to quickly acquire three-dimensional optical information of the oral soft and hard tissues through optical technology; reconstructing the information of the maxillary and mandibular implant areas and surrounding soft tissues using an algorithm; then replacing it with an extraoral scanning rod and using an extraoral scanner to acquire the three-dimensional position information of the scanning rod; importing the acquired three-dimensional position of the scanning rod into three-dimensional design software; selecting matching implant replacement data from the software database and virtually connecting it to the data of the scanning rod to obtain the three-dimensional position information of the patient's intraoral implant; and stitching it with the information acquired by the intraoral scan to obtain the digital impression of the patient's intraoral implant, which includes the three-dimensional position of the implant, the morphological information of the SRA abutment, and the three-dimensional data of the surrounding soft tissue.
[0025] Preferably, in step S1, the 3D process of the personalized Gothic arch assembly for dental implant restoration includes: designing a maxillary Gothic arch tracing plate, tracing needle, and mandibular tracing needle fixation bracket adapted to the patient's dental arch morphology in 3D design software based on the obtained digital impression of the implant; preparing the personalized Gothic arch assembly for the patient's dental implant restoration using 3D printed PMMA material; and simultaneously 3D printing the patient's maxillary and mandibular models.
[0026] Preferably, in step S2, the installation process of the personalized Gothic arch assembly for dental implant restoration includes: rigidly fixing the personalized Gothic arch assembly for dental implant restoration to the SRA abutment of the patient's implant using fixing screws that match the SRA abutment; the connection method ensures that the personalized Gothic arch assembly for dental implant restoration remains stable during the patient's protrusion and lateral movements, avoiding the problem of inaccurate jaw relationship caused by the movement of traditionally made mucosa-supported personalized Gothic arches or occlusal brackets during protrusion and lateral movements.
[0027] Preferably, in step S3, the process of determining the vertical relationship includes: according to occlusal consensus, the vertical distance of the interdental interposition of the patient is 2-3 mm, which is equal to the vertical distance when the patient is in the resting jaw position. The vertical distance of the patient in the resting jaw position is subtracted by 2-3 mm to obtain the vertical distance of the interdental interposition. Different tracing needle heights are selected, and the tracing needles are inserted into the mandibular tracing needle fixation bracket. Because the mandibular tracing needle fixation bracket, the tracing needle, the maxillary Gothic arch tracing plate, and the implant SRA abutment are rigidly connected or in contact, stable and rigid support is provided for the determined vertical distance, avoiding the problem of vertical distance changes caused by mucosal elasticity in traditionally fabricated mucosal-supported personalized Gothic arches.
[0028] Preferably, in step S4, the process of determining the horizontal jaw position relationship includes: spraying tracing powder onto the surface of the maxillary Gothic arch tracing board, and using resin to fix the mandibular movement trajectory tracking locator on the labial side of the U-shaped bar of the mandibular tracing needle fixation bracket. The patient is guided to perform mandibular protrusion and lateral movements at a determined vertical distance. The tracing needle leaves an arrow-shaped trajectory on the maxillary Gothic arch tracing board, and the apex of the arrow is the centric jaw position to be determined. At the same time, an electronic face bow is used to record the mandibular movement trajectory of the patient during protrusion, lateral movement, and mouth opening and closing movements, and corresponding data is generated.
[0029] Preferably, in step S5, the patient's mandibular movement is guided to position the recording pin at the apex of the arrow. The relative position of the personalized Gothic arch assembly for dental implant restoration is fixed using occlusal recording silicone rubber material, thus completing the recording of the maxillary-mandibular relationship. The fixing screws on the SRA abutment are loosened, the personalized Gothic arch assembly for dental implant restoration is removed, the maxillary-mandibular relationship is transferred to the fully adjustable articulator, and the mandibular movement trajectory data is also transferred to the fully adjustable articulator. The implant superstructure is designed and fabricated, and placed in the patient's mouth. Simultaneously, the maxillary-mandibular relationship and mandibular movement trajectory are recorded to comprehensively obtain the mandibular position information under both resting and functional movement conditions, improving the accuracy of prosthesis fabrication and occlusal design.
[0030] Compared with the prior art, the beneficial effects of the present invention are as follows:
[0031] 1. A personalized Gothic arch assembly for dental implant restoration, designed using a digital workflow combined with CAD / CAM, is rigidly connected and screw-fixed to the SRA abutment of the implant. Unlike traditional mucosa-supported occlusal brackets, which are prone to shifting during mandibular movement, this Gothic arch assembly is rigidly connected and fixed, maintaining stability at all times. It accurately records the trajectory of mandibular movement, making the recording and transfer of mandibular relationships more realistic and accurate.
[0032] 2. In determining the vertical distance, the traditional wax embankment has poor dimensional stability, affecting accuracy. This invention designs and manufactures five resin tracing needles of different heights. This material combines rigidity and toughness, meeting the structural strength requirements of the device while supporting the chairside turbine for fine adjustment of the tracing needle height. The appropriate tracing needle can be selected and adjusted to the appropriate height according to the patient's vertical distance. At the same time, it is combined with silicone rubber with excellent dimensional stability to complete the occlusal registration, avoiding the vertical distance transfer error introduced by the deformation of traditional materials. It is assembled and fixed in the mandibular tracing needle fixation bracket, which can transfer the vertical distance more stably and accurately. Attached Figure Description
[0033] Figure 1 In the example, CBCT showed good osseointegration of the implant 3 months after the implantation.
[0034] Figure 2 This is a schematic diagram of the design of the personalized Gothic bow assembly for dental implant restoration in the embodiment; wherein, A: design drawing of the maxillary Gothic bow tracing plate; B: design drawing of the mandibular tracing needle fixation bracket; C: design drawing of the personalized Gothic bow assembly for dental implant restoration and 5 tracing needles of different heights; D: schematic diagram of the assembly of the personalized Gothic bow assembly and tracing needles for dental implant restoration; E: physical image of the personalized Gothic bow assembly for dental implant restoration, 1-maxillary Gothic bow tracing plate, 2-mandibular tracing needle fixation bracket, 3-tracing needle.
[0035] Figure 3 In Example 1, A: After the personalized Gothic arch component for oral implant restoration is fixed in place with screws inside the mouth, a suitable tracing needle is selected to obtain the appropriate vertical distance, and the patient is instructed to perform mandibular protrusion and lateral movements; B: The screw-fixed maxillary Gothic arch tracing plate shows a symmetrical "Gothic arch" on its surface, with its apex being the "central relation point"; C: A physical image of the screw-fixed mandibular tracing needle fixation bracket; D: The mandibular movement trajectory is recorded using an electronic facebow.
[0036] Figure 4 In Example 1, A: the jaw position relationship is transferred to the articulator based on the occlusal record of silicone rubber and electronic facebow data; B: after removing the silicone rubber, a physical model simulating the patient's mouth is obtained on the articulator.
[0037] Figure 5 In Example 1, a virtual patient was designed and constructed in the design software.
[0038] Figure 6 A: Photograph of the resin restoration model in Example 1; B: Photograph of the occlusal cavity of the resin restoration.
[0039] Figure 7 A: Internal view of the centric occlusion of the final restoration in Example 1; B: Internal view of the anterior occlusion of the final restoration. Detailed Implementation
[0040] To more fully understand and demonstrate the technical solutions, objectives, and advantages of the present invention, the technical effects produced by the present invention will be further described in detail and completely below with reference to the accompanying drawings and specific embodiments. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. It should be noted that other embodiments obtained by those skilled in the art without departing from the concept of the present invention are all within the protection scope of the present invention.
[0041] The following embodiments present a personalized Gothic arch assembly for dental implant restoration, comprising: a mandibular tracing needle fixation bracket, several tracing needles of different heights, a maxillary Gothic arch tracing plate, and several fixing screws; the mandibular tracing needle fixation bracket includes two structures: a "Y"-shaped tracing needle positioning bracket and a personalized implant fixation bracket; the tracing needles are fitted into the groove in the center of the mandibular tracing needle fixation bracket through a shaft-hole fitting structure; the maxillary Gothic arch tracing plate is "U"-shaped and adapted to the maxillary dental arch;
[0042] Both the mandibular tracing needle fixation bracket and the maxillary Gothic arch tracing plate are pre-drilled with screw channels for precise alignment with the implant, and are matched with the fixation screws.
[0043] The mandibular tracing needle fixation bracket, tracing needle, and maxillary Gothic arch tracing plate are all made of high-strength resin material.
[0044] The 3D printing technology used in the following embodiments can be carried out using conventional operations in the existing technology.
[0045] In some embodiments, the maxillary Gothic arch tracing plate is made of high-strength polymethyl methacrylate (PMMA) material, manufactured using 3D printing technology. It is U-shaped and has an attachment that can be fixed to the implant SRA abutment by screws, allowing for personalized fabrication to suit the patient's dental arch shape.
[0046] In some embodiments, the mandibular tracing needle fixation bracket is made of high-strength polymethyl methacrylate (PMMA) material, manufactured using 3D printing technology, and has a three-column supported groove structure with a U-shaped rod attachment that can be fixed to the implant SRA abutment by screws, and is customized to adapt to the patient's dental arch morphology.
[0047] In some embodiments, the tracing needle is made of high-strength polymethyl methacrylate (PMMA) and manufactured using 3D printing technology. Its height can be made in five different sizes: 7mm, 8mm, 9mm, 10mm, and 11mm, depending on requirements. It is fixed to or removed from the mandibular tracing needle fixation bracket via insertion and removal. In some specific embodiments, it can be adjusted to suit the patient's individualized occlusal vertical distance.
[0048] In some embodiments, titanium screws that match the implant SRA abutment are used to fix the personalized Gothic bow for dental implant restoration to the SRA abutment as a whole, achieving a rigid connection and ensuring retention and stability.
[0049] The following embodiments also provide a method for determining the digital jaw position relationship based on a personalized Gothic arch component for dental implant restoration, including the following steps:
[0050] S1. Digital impressions are obtained by scanning both intraorally and extraorally of the subject. CAD / CAM is used to design and 3D print personalized Gothic bow components for dental implant restoration.
[0051] S2. Use fixing screws to fix the mandibular tracing needle fixing bracket and the maxillary Gothic arch tracing plate to the mandibular and maxillary SRA abutments.
[0052] S3. Select tracing needles of different heights according to the patient's vertical distance, fix them to the mandibular tracing needle fixation bracket, and use a turbine to perform fine adjustment to determine the vertical distance;
[0053] S4. Spray tracing powder onto the surface of the maxillary Gothic arch tracing board. The patient performs mandibular protrusion and lateral movements. The tracing needle draws a "duck's foot" shaped trajectory on the tracing board. The centric relation is accurately marked at the intersection of the trajectory. At the same time, the mandibular movement trajectory is recorded in conjunction with an electronic facebow. Silicone rubber is injected into the occlusal space to complete the occlusal registration.
[0054] S5. Remove the personalized Gothic arch assembly for dental implant restoration, and install the fully adjustable articulator based on the occlusal record and electronic facebow data to complete the determination of centric relation.
[0055] In some embodiments, in step S1, the subject is an edentulous patient who has completed the first and second stages of implant surgery and needs implant-supported superstructure restoration.
[0056] In some embodiments, step S1, the digital impression taking process includes: fixing the digital impression scanning rod to the SRA abutment of the patient's intraoral implant, ensuring the scanning rod is stable and properly positioned, and then using an intraoral and extraoral scanner to acquire the three-dimensional position information of the scanning rod; importing the acquired three-dimensional position of the scanning rod into three-dimensional design software, selecting matching implant replacement data from the software database, and virtually connecting it to the data of the scanning rod to obtain the three-dimensional position information of the patient's intraoral implant, i.e., obtaining the digital impression of the patient's intraoral implant, which includes the three-dimensional position of the implant and the morphological information of the SRA abutment.
[0057] In some embodiments, step S1, the 3D process of the personalized Gothic arch assembly for dental implant restoration includes: designing a maxillary Gothic arch tracing plate, tracing needle, and mandibular tracing needle fixation bracket adapted to the patient's dental arch morphology in 3D design software based on the obtained digital impression of the implant; preparing the patient's personalized Gothic arch assembly for dental implant restoration using 3D printed PMMA material; and simultaneously 3D printing the patient's maxillary and mandibular models.
[0058] In some embodiments, step S2, the installation process of the personalized Gothic bow assembly for dental implant restoration includes: rigidly fixing the personalized Gothic bow assembly for dental implant restoration to the SRA abutment of the patient's intraoral implant using fixing screws that match the SRA abutment; the connection method can ensure that the personalized Gothic bow assembly for dental implant restoration remains stable during the patient's protrusion and lateral movements, avoiding the problem of inaccurate jaw relationship caused by the movement of the mucosa-supported personalized Gothic bow or occlusal bracket during protrusion and lateral movements in traditional methods.
[0059] In some embodiments, step S3, the process of determining the vertical relationship, includes: according to occlusal consensus, the vertical distance of the patient's interdental interposition is 2-3 mm, which is equal to the vertical distance in the resting jaw position. The vertical distance in the resting jaw position is subtracted by 2-3 mm to obtain the vertical distance of the patient's interdental interposition. Different tracing needle heights are selected, and the tracing needle is inserted into the mandibular tracing needle fixation bracket. Because the mandibular tracing needle fixation bracket, the tracing needle, the maxillary Gothic arch tracing plate, and the implant SRA abutment are rigidly connected or in contact, stable and rigid support is provided for the determined vertical distance, avoiding the problem of vertical distance changes caused by mucosal elasticity in traditionally fabricated mucosal-supported personalized Gothic arches.
[0060] In some embodiments, step S4, the process of determining the horizontal jaw position relationship, includes: spraying tracing powder onto the surface of the maxillary Gothic arch tracing plate, and using resin to fix the mandibular movement trajectory tracking locator on the labial side of the U-shaped bar of the mandibular tracing needle fixation bracket, guiding the patient to perform mandibular protrusion and lateral movements at a determined vertical distance, the tracing needle leaving an arrow-shaped trajectory on the maxillary Gothic arch tracing plate, the apex of the arrow being the centric jaw position to be determined, and simultaneously using an electronic facebow to record the mandibular movement trajectory of the patient during protrusion, lateral, and mouth opening and closing movements, and generating corresponding data.
[0061] In some embodiments, in step S5, the patient's mandibular movement is guided to position the recording pin at the apex of the arrow. The relative position of the personalized Gothic arch assembly for dental implant restoration is fixed using occlusal recording silicone rubber material, thus completing the recording of the maxillary-mandibular position relationship. The fixing screws on the SRA abutment are loosened, the personalized Gothic arch assembly for dental implant restoration is removed, the mandibular position relationship is transferred to the fully adjustable articulator, and the mandibular movement trajectory data is transferred to the fully adjustable articulator. The implant superstructure is designed and fabricated, and placed in the patient's mouth. Simultaneously, the maxillary-mandibular position relationship and mandibular movement trajectory are recorded to comprehensively obtain the mandibular position information of the patient in both resting and functional movement states, improving the accuracy of prosthesis fabrication and occlusal design.
[0062] Example 1 (Case study of patient treatment based on personalized Gothic bow components for dental implant restoration)
[0063] 1. Before the operation, a digital radiographic guide plate is designed and fabricated using CAD-CAM technology. After the implant design is completed, a surgical guide plate is fabricated using 3D printing technology. During the operation, the implant is placed under the precise guidance of the guide plate. A removable complete denture is fabricated to restore part of the patient's occlusal function.
[0064] 2. Three months post-surgery, a CBCT scan is performed to confirm complete osseointegration of the implant. Figure 1 The second-stage surgery was performed, the SRA base was replaced, and a protective cap was put on.
[0065] 3. One month after the second-stage surgery, a digital impression was taken to obtain three-dimensional data containing information on the implant position and surrounding soft tissue. Based on the acquired three-dimensional data, a personalized Gothic arch implant positioning device (for edentulous jaws) was designed and 3D printed. Figure 2 The maxilla uses a Gothic arch marking plate, and the mandible uses a detachable marking needle with heights of 7mm, 8mm, 9mm, 10mm, and 11mm respectively.
[0066] 4. The device is rigidly connected to the composite abutment of the maxillary and mandibular implants using screw fixation. By changing the height of the tracing needle, the patient's mouth opening degree is adjusted to obtain a suitable vertical distance. The midline relationship is determined at the intersection of the forward, left, and right movements. Figure 3 AC), recording the mandibular movement trajectory through an electronic face bow ( Figure 3 D), inject occlusal recording silicone rubber into the occlusal space.
[0067] 5. Remove the upper and lower jaw Gothic arches and install a fully adjustable articulator based on existing occlusal records and electronic facebow data. Figure 4 ).
[0068] 6. Using a facial 3D scanner to acquire the patient's facial 3D data, fit the patient's intraoral and extraoral scans, mandibular movement trajectory, and facial 3D scan data to construct a virtual patient and design the prosthesis. Figure 5 ).
[0069] 7. Once the prosthesis design is complete, the resin prosthesis is cut, tried on in the patient's mouth, and examined. Figure 6 The electronic face bow was used to record the mandibular movement trajectory of the patient while wearing the resin prosthesis, and to check whether the movement trajectory of the bilateral temporomandibular joints was symmetrical and whether the movement curve was smooth.
[0070] 8. Based on the trial fitting of the resin restoration, adjust the restoration design, fabricate the final restoration using CAD / CAM milling, and insert it into the patient's mouth to complete the restoration. Figure 7 ).
[0071] The above are merely preferred embodiments of the present invention and are not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.
Claims
1. A personalized gothic arch assembly for oral implant restoration, characterized by, The device includes a mandibular tracing needle fixation bracket, several tracing needles of different heights, a maxillary Gothic arch tracing plate, and several fixing screws. The mandibular tracing needle fixation bracket comprises two structures: a "Y"-shaped tracing needle positioning bracket and a personalized implant fixation bracket. The tracing needles are fitted into the central groove of the mandibular tracing needle fixation bracket via a shaft-hole fitting structure. The maxillary Gothic arch tracing plate is "U"-shaped and adapts to the maxillary dental arch. Both the mandibular tracing needle fixation bracket and the maxillary Gothic arch tracing plate are pre-reserved with screw channels for precise alignment with the implant, and are matched with the fixation screws. The mandibular tracing needle fixation bracket, tracing needle, and maxillary Gothic arch tracing plate are all made of high-strength resin material.
2. The personalized gothic arch assembly for dental implant restoration according to claim 1, wherein, The maxillary Gothic arch marking plate is made of high-strength PMMA material and is manufactured using 3D printing technology. It is U-shaped and has an accessory that can be fixed to the implant SRA abutment by screws.
3. The personalized gothic arch assembly for dental implant restoration according to claim 1, wherein, The mandibular tracing needle fixation bracket is made of high-strength PMMA material and is manufactured using 3D printing technology. It has a three-column supported groove structure and a U-shaped rod attachment that can be fixed to the implant SRA abutment by screws.
4. The personalized Gothic bow assembly for dental implant restoration according to claim 1, characterized in that, The tracing needle is made of high-strength PMMA material and is manufactured using 3D printing technology. It comes in five different heights: 7mm, 8mm, 9mm, 10mm, and 11mm. It can be fixed or removed from the mandibular tracing needle fixing bracket by plugging and unplugging.
5. The personalized Gothic bow assembly for dental implant restoration according to claim 1, characterized in that, The fixing screws are titanium screws that match the SRA abutment of the implant, used to fix the personalized Gothic bow assembly for dental implant restoration to the SRA abutment as a whole, to achieve a rigid connection and ensure retention and stability.
6. The application of the personalized Gothic bow assembly for dental implant restoration as described in any one of claims 1 to 5 in determining digital jaw position relationships during dental implant restoration.
7. A method for determining the occlusal relationship based on the personalized Gothic arch assembly for dental implant restoration as described in any one of claims 1 to 5, characterized in that, Includes the following steps: S1. A digital impression is obtained by dual scanning of the subject's intraoral and extraoral cavities, and a personalized Gothic bow assembly for oral implant restoration as described in any one of claims 1 to 5 is designed and 3D printed using CAD / CAM. S2. Fix the mandibular tracing needle fixing bracket and the maxillary Gothic arch tracing plate to the mandibular and maxillary SRA abutments using fixing screws. S3. Select recording needles of different heights according to the patient's vertical distance, fix them on the mandibular recording needle fixing bracket, and use a turbine to perform fine grinding to determine the vertical distance; S4. Spraying tracing powder onto the surface of the maxillary Gothic arch tracing plate, the patient performs mandibular protrusion and lateral movements, and the tracing needle draws a "duck's foot" shaped trajectory on the maxillary Gothic arch tracing plate, with the centric relation accurately marked at the intersection of the trajectory; at the same time, the mandibular movement trajectory is recorded in conjunction with an electronic facebow, and occlusal recording silicone rubber is injected into the occlusal space to complete the occlusal registration; S5. Remove the personalized Gothic bow assembly for dental implant restoration, and install the fully adjustable frame according to the occlusion record and electronic facebow data to complete the determination of the centric relationship.
8. The method for determining the digital jaw position relationship based on a personalized Gothic arch assembly for dental implant restoration according to claim 7, characterized in that, In step S1, the subjects are edentulous patients who have completed the first and second stages of implant surgery and need implant-supported maxillary restoration.
9. The method for determining the digital jaw position relationship based on a personalized Gothic arch assembly for dental implant restoration according to claim 7, characterized in that, In step S1, the digital impression taking process includes: fixing the digital impression intraoral scanning rod to the patient's intraoral implant; after confirming the stability and position of the scanning rod, using an intraoral scanner to quickly acquire three-dimensional optical information of the oral soft and hard tissues through optical technology; reconstructing the information of the maxillary and mandibular implant areas and surrounding soft tissues using algorithms; then replacing it with an extraoral scanning rod; using an extraoral scanner to acquire the three-dimensional position of the scanning rod and importing it into three-dimensional design software; selecting matching implant replacement data from the software database and virtually connecting it to the data of the scanning rod to obtain the three-dimensional position information of the patient's intraoral implant; and stitching it with the information acquired by the intraoral scan to obtain the digital impression of the patient's intraoral implant, which includes three-dimensional data of the implant position and surrounding soft tissue information. The 3D process for the personalized Gothic arch assembly for dental implant restoration includes: designing a maxillary Gothic arch tracing plate, tracing needle, and mandibular tracing needle fixation frame adapted to the patient's dental arch morphology in 3D design software based on the obtained digital impression of the implant; fabricating the patient's personalized Gothic arch assembly for dental implant restoration using 3D-printed high-strength PMMA material; and simultaneously 3D-printing the patient's maxillary and mandibular models.
10. The method for determining the digital jaw position relationship based on a personalized Gothic arch assembly for dental implant restoration according to claim 7, characterized in that, In step S2, the installation process of the personalized Gothic bow assembly for dental implant restoration includes: using fixing screws that match the SRA abutment to rigidly fix the personalized Gothic bow assembly for dental implant restoration to the SRA abutment of the implant in the patient's mouth; the connection method ensures that the personalized Gothic bow assembly for dental implant restoration remains stable during the patient's forward and lateral movements; In step S3, the process of determining the vertical relationship includes: subtracting 2-3 mm from the vertical distance of the patient's resting jaw position as the vertical distance of the patient's intercuspal position, selecting different tracing needle heights, and inserting the tracing needle into the mandibular tracing needle fixation bracket. In step S4, the process of determining the horizontal jaw position relationship includes: spraying tracing powder onto the surface of the maxillary Gothic arch tracing plate, and using resin to fix the mandibular movement trajectory tracking locator on the labial side of the U-shaped bar of the mandibular tracing needle fixation bracket, guiding the patient to perform mandibular protrusion and lateral movements at a determined vertical distance, the tracing needle leaving an arrow-shaped trajectory on the maxillary Gothic arch tracing plate, the apex of the arrow being the centric jaw position to be determined, and simultaneously using an electronic face bow to record the mandibular movement trajectory of the patient during protrusion, lateral, and mouth opening and closing movements, and generating corresponding data; In step S5, the patient's mandibular movement is guided to position the recording needle at the tip of the arrow. The relative position of the personalized Gothic arch assembly for dental implant restoration is fixed using occlusal recording silicone rubber material, thus completing the recording of the maxillary-mandibular position relationship. The fixing screws on the SRA abutment are loosened, the personalized Gothic arch assembly for dental implant restoration is removed, the mandibular position relationship is transferred to the fully adjustable articulator, and the mandibular movement trajectory data is transferred to the fully adjustable articulator. The implant superstructure is designed and fabricated, and placed in the patient's mouth. At the same time, the maxillary-mandibular position relationship and mandibular movement trajectory are recorded to comprehensively obtain the mandibular position information of the patient in resting and functional movement states.