A digital mandibular precise positioning and customized removable denture preparation integrated method

Abstract

The application discloses a kind of digital lower jaw accurate positioning and customized removable denture preparation integrated method, it is related to stomatology technical field. Including: initial diagnosis data collection;Digital modeling and jaw position adjustment;Design treatment jaw position guide plate;Try on jaw position guide plate, check lower jaw movement, confirm facial form beautiful, prepare silicon rubber final impression, record the actual occlusion relationship of patient;Based on occlusion relationship preparation-final denture, the obtained-final denture is carried out clinical evaluation.The application is for complex oral conditions, such as occlusion disorder, temporomandibular joint disorder patient, by obtaining personalized fitting removable denture, adjusting the relative position relationship of upper and lower jaw bones, relieving abnormal stress of joint, assisting the stability and recovery of temporomandibular joint, realizing the unity of stability and aesthetic effect of stomatognathic system after repair.

Description

Technical Field

[0001] This invention relates to the field of oral medicine technology, and more specifically to an integrated method for digital mandibular precision positioning and customized removable denture fabrication. Background Technology

[0002] Removable dentures (including complete dentures, removable partial dentures, and overdentures) are one of the main methods for restoring missing or damaged teeth. The key to successful restoration lies in accurately determining and reproducing the patient's physiological jaw relationship, especially the correct position of the mandible relative to the maxilla and skull base.

[0003] Currently, existing technologies for mandibular positioning and fabrication of removable dentures have the following problems: 1. High technical sensitivity, poor repeatability of results; 2. Relies on manual techniques and experience to guide jaw position, prone to deviations in occlusal relationship; 3. Involves systematic errors caused by auxiliary tools, resulting in low efficiency, such as traditional facebows, Gothic arches, and articulators; 4. Requires high clinical skills from doctors and is difficult to operate; 5. Relies on the manual skills and experience of senior technicians, resulting in unstable processing and high rework rate; 6. Low clinical efficiency, high number of visits, and high follow-up rate; 7. Poor restorative effects, including poor denture retention, occlusal discomfort, and temporomandibular joint damage; 8. Poor homogeneity and limited applicability.

[0004] Therefore, proposing an integrated method for precise digital mandibular positioning and customized removable denture fabrication to address the difficulties of existing technologies is a problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0005] In view of this, the present invention provides an integrated method for digital mandibular precision positioning and customized removable denture preparation. For patients with complex oral conditions such as malocclusion and temporomandibular joint disorders, personalized and well-fitting full-mouth removable dentures can be obtained to adjust the relative positional relationship of the upper and lower jaws, alleviate abnormal joint stress, assist in the stability and recovery of the temporomandibular joint, and achieve the unity of stability and aesthetic effect of the oral and maxillofacial system after restoration.

[0006] To achieve the above objectives, the present invention provides the following technical solution: A method integrating digital mandibular precision positioning and customized removable denture fabrication includes the following steps: S1. Collect medical digital imaging data and oral model data of the patient's craniofacial region to obtain a dataset, and create artificial radiographic positioning points in the mucosal tissue area; S2. Construct a three-dimensional model of the patient's craniofacial structure using the dataset, separate and extract the upper and lower jaws to obtain a three-dimensional model of the upper and lower jaws, and register and fuse the oral cavity model with the three-dimensional model of the upper and lower jaws based on the radial positioning points to obtain a three-dimensional model of the stomatognathic system. S3. A digital transfer platform consisting of an articulator base plate and a dental arch is constructed by combining a virtual articulator system. Based on the three-dimensional model of the stomatognathic system, the spatial position of the condyle and mandible is adjusted to establish a normal occlusal plane and obtain a model of the upper and lower dental arches in the treatment position. S4. Design a jaw position guide for treatment to obtain a jaw position guide with individual tray function; S5. Try on the jaw positioning guide plate, check the mandibular movement, confirm the aesthetic appearance of the face, prepare the final silicone rubber impression, and record the patient's actual occlusal relationship. S6. Prepare the final denture based on the occlusal relationship, and conduct a clinical evaluation of the obtained final denture.

[0007] Optionally, in S1, cone-beam computed tomography or spiral computed tomography and molding operations are used to acquire medical digital imaging data of the patient's craniofacial region and oral model data to obtain a dataset.

[0008] Optionally, in S4, a jaw guide with individual tray function can be designed using Exocad and 3Shape design software; Try on the jaw positioning guide with individual tray function, and when the anterior teeth are evenly biting into the preset imprint of the jaw positioning guide, the mandible moves to the preset jaw position.

[0009] Optionally, clinical examination of changes in the patient's mandibular movement and improvement in facial shape can be used as a basis for judging whether the design of the jaw guide plate is correct.

[0010] Optionally, in S5, after determining the jaw position based on the jaw position guide, a final silicone rubber impression of the patient's denture restoration area is prepared, the midline, upper lip line, and corner of the mouth line are marked, a trial fitting is performed, the occlusal relationship at this time is recorded, a working model is made, a digital transfer table is printed, and the occlusal record obtained intraorally is used to cross the upper occlusal articulator.

[0011] Optionally, the final denture can be fabricated using conventional injection molding, 3D printing, or cutting techniques, and the overall trial piece can be clinically evaluated in terms of aesthetics, pronunciation, and function.

[0012] As can be seen from the above technical solution, compared with the prior art, the present invention provides an integrated method for digital mandibular precision positioning and customized removable denture preparation, which has the following beneficial effects: (1) This invention constructs a three-dimensional model of the maxillofacial region by digitally controlling the occlusal relationship and generating an individual tray with jaw position guidance function, so that the designed prosthesis is more suitable for the patient's personalized maxillofacial system structure, simplifies the clinical process, improves the repair effect, and solves the drawback of needing multiple adjustments in traditional processes. (2) This invention has low technical threshold and strong clinical applicability. Through full-process digital design, it completes the production of individual components such as trays, bases, and frames of removable dentures. Then, it achieves personalized processing of the final denture through 3D printing or cutting, shortens the denture production cycle, reduces the dependence on manual skills, and improves the standardization level and production efficiency of denture processing. (3) For patients with complex oral conditions such as malocclusion and temporomandibular joint disorders, this invention can adjust the relative position of the upper and lower jaws by obtaining personalized and suitable full dentures, alleviate abnormal joint stress, assist in the stability and recovery of the temporomandibular joint, and achieve the unity of stability and aesthetic effect of the oral and maxillofacial system after restoration. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of the present 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 only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0014] Figure 1 This invention provides a flowchart of an integrated method for precise digital mandibular positioning and customized removable denture fabrication. Figure 2 This is a schematic diagram of jaw position adjustment provided by the present invention; Figure 3 This is a schematic diagram of the jaw guide plate with individual tray function provided by the present invention; Figure 4 A schematic diagram of a personalized digital transfer station provided by the present invention; Figure 5 A schematic diagram of the integrated resin disc cutting denture base and teeth provided by the present invention; Figure 6 The diagram illustrates the bracket printing, artificial tooth arrangement, and injection molding provided by this invention. Detailed Implementation

[0015] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0016] See Figure 1 As shown, this invention discloses an integrated method for digital mandibular precision positioning and customized removable denture fabrication, comprising the following steps: S1. Collect medical digital imaging data and oral model data of the patient's craniofacial region to obtain a dataset, and create artificial radiographic positioning points in the mucosal tissue area; S2. Construct a three-dimensional model of the patient's craniofacial structure using the dataset, separate and extract the upper and lower jaws to obtain a three-dimensional model of the upper and lower jaws, and register and fuse the oral cavity model with the three-dimensional model of the upper and lower jaws based on the radial positioning points to obtain a three-dimensional model of the stomatognathic system. S3. A digital transfer platform consisting of an articulator base plate and a dental arch is constructed by combining a virtual articulator system. Based on the three-dimensional model of the stomatognathic system, the spatial position of the condyle and mandible is adjusted to establish a normal occlusal plane and obtain a model of the upper and lower dental arches in the treatment position. S4. Design a jaw position guide for treatment to obtain a jaw position guide with individual tray function; S5. Try on the jaw positioning guide plate, check the mandibular movement, confirm the aesthetic appearance of the face, prepare the final silicone rubber impression, and record the patient's actual occlusal relationship. S6. Prepare the final denture based on the occlusal relationship, and conduct a clinical evaluation of the obtained final denture.

[0017] Furthermore, in S1, cone-beam computed tomography or spiral computed tomography and molding operations are used to acquire medical digital imaging data of the patient's craniofacial region and oral model data to obtain a dataset.

[0018] Furthermore, in S4, a jaw guide with individual tray function was designed using Exocad and 3Shape design software; Try on the jaw positioning guide with individual tray function, and when the anterior teeth are evenly biting into the preset imprint of the jaw positioning guide, the mandible moves to the preset jaw position.

[0019] Furthermore, clinical examination of changes in the patient's mandibular movement and improvements in facial shape is used as a basis for judging whether the design of the jaw positioning guide is correct.

[0020] Furthermore, in S5, after determining the jaw position based on the jaw position guide, a final silicone rubber impression of the patient's prosthesis restoration area is prepared, the midline, upper lip line, and corner of the mouth line are marked, a trial fitting is performed, the occlusal relationship at this time is recorded, a working model is made, a digital transfer table is printed, and the occlusal record obtained intraorally is used to cross the upper occlusal articulator.

[0021] Furthermore, the final prosthesis is prepared using traditional injection molding, 3D printing, or cutting techniques, and the overall trial fitting is clinically evaluated in terms of aesthetics, pronunciation, and function.

[0022] In one specific embodiment, the following is included: I. Initial Diagnosis Data Collection The patient underwent cone-beam computed tomography (CBCT) or spiral computed tomography (CBCT) and mold-taking procedures sequentially to acquire medical digital imaging and communication (DICOM) standard format data of the craniofacial region (including the temporomandibular joint and the complete mandibular bone region) and oral tissue three-dimensional image STL / OBJ data. Artificially marked radiographic positioning points were formed in the mucosal tissue areas such as the hard palate and alveolar ridge crest as registration points for the three-dimensional reconstruction of the model and image data. II. Digital Modeling and Jaw Position Adjustment like Figure 2 As shown, a three-dimensional model of the individual's craniofacial region is constructed using CT data, and the maxilla and mandible are separated and extracted. Using radiographic positioning landmarks as a reference, the oral cavity model is registered and fused with the three-dimensional models of the maxilla and mandible to construct a three-dimensional model of the oral occlusal system (e.g., using the AVIAS digital twin system independently developed by West China School of Stomatology). A personalized digital transfer platform composed of an articulator base plate and dentition is constructed in combination with a virtual articulator system. Based on this three-dimensional model, the spatial position of the condyle and mandible is precisely controlled to establish a normal occlusal plane, adjust the relative positional relationship of the maxilla and mandible, and achieve symmetrical coordination of bilateral masticatory muscle activity, thereby obtaining a model of the upper and lower dentition in the treatment occlusal position.

[0023] III. Design of Treatment Jaw Position Guide

[0024] like Figure 3 As shown, a jaw positioning guide with individual tray function is designed using design software such as Exocad and 3Shape. It is then fabricated using 3D printing and tested intraorally. When the anterior teeth are evenly bitten into the preset imprints on the guide, the mandible can accurately move to the preset jaw position. Clinical examination of the patient's mandibular movement changes and facial shape improvement is used as a reference to judge whether the jaw positioning guide design is correct. After determining the jaw position, the patient's occlusal relationship can be recorded using occlusal recording silicone rubber, and subsequent articulation operations can be performed using a digital transfer table. Among them, the edge extension range of the jaw guide plate and the individual trays of the removable denture should be basically consistent; Using the upper and lower dentition models of the treatment jaw position, Exocad and 3Shape were used to design jaw position guides with individual tray functions and arrange teeth. Anatomically missing teeth were designed on the upper and lower jaw models, and only the occlusal points of the incisor area (1-1 / 2-2) were preserved. The occlusal points were designed as long strip shallow fossae without tight cusp-fossa locks. The labial shape of the anterior teeth met the aesthetic requirements, and no occlusal contact was designed for the posterior teeth, while the cusp-fossa morphology was preserved to ensure the gap and stability of subsequent occlusal records. IV. Simultaneous preparation of the final impression and recording of jaw position relationship A fine silicone rubber final impression was prepared using a jaw positioning guide, marking the midline, upper lip line, and corner of the mouth line; after an intraoral trial fitting, the actual occlusal relationship of the silicone rubber in the posterior tooth region was recorded using an occlusal recorder; a working model was prepared, and a personalized digital transfer stage (such as...) was printed. Figure 4 As shown, the occlusal record obtained intraorally is crossed with the articulator; the margin of the prosthesis restoration area is shaped with the help of the jaw guide, and a high-precision silicone rubber impression is made; the facial aesthetic dimensions such as lip fullness and incisor point position are evaluated simultaneously to ensure the unity of occlusal function and aesthetic effect after restoration. V. Dental Prosthesis Fabrication like Figure 5 , Figure 6 As shown, final dentures are fabricated using traditional injection molding, 3D printing, or cutting techniques; the overall trial fitting is clinically evaluated in terms of aesthetics, pronunciation, and function.

[0025] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0026] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A method integrating digital mandibular precision positioning and customized removable denture fabrication, characterized in that, Includes the following steps: S1. Collect medical digital imaging data and oral model data of the patient's craniofacial region to obtain a dataset, and create artificial radiographic positioning points in the mucosal tissue area; S2. Construct a three-dimensional model of the patient's craniofacial structure using the dataset, separate and extract the upper and lower jaws to obtain a three-dimensional model of the upper and lower jaws, and register and fuse the oral cavity model with the three-dimensional model of the upper and lower jaws based on the radial positioning points to obtain a three-dimensional model of the stomatognathic system. S3. A digital transfer platform consisting of an articulator base plate and a dental arch is constructed by combining a virtual articulator system. Based on the three-dimensional model of the stomatognathic system, the spatial position of the condyle and mandible is adjusted to establish a normal occlusal plane and obtain a model of the upper and lower dental arches in the treatment position. S4. Design a jaw position guide for treatment to obtain a jaw position guide with individual tray function; S5. Try on the jaw positioning guide plate, check the mandibular movement, confirm the aesthetic appearance of the face, prepare the final silicone rubber impression, and record the patient's actual occlusal relationship. S6. Prepare the final denture based on the occlusal relationship, and conduct a clinical evaluation of the obtained final denture.

2. The integrated method for digital mandibular precision positioning and customized removable denture fabrication according to claim 1, characterized in that, In S1, cone-beam computed tomography (CBCT) or spiral computed tomography (CBCT) and molding operations are used to acquire medical digital imaging data of the patient's craniofacial region and oral cavity model data to obtain a dataset.

3. The integrated method for digital mandibular precision positioning and customized removable denture fabrication according to claim 1, characterized in that, In S4, a jaw positioning guide with individual tray function was designed using Exocad and 3Shape design software. Try on the jaw positioning guide with individual tray function, and when the anterior teeth are evenly biting into the preset imprint of the jaw positioning guide, the mandible moves to the preset jaw position.

4. The integrated method for digital mandibular precision positioning and customized removable denture fabrication according to claim 3, characterized in that, Clinical examination of changes in the patient's mandibular movement and improvement in facial shape serves as a basis for determining whether the design of the jaw positioning guide plate is correct.

5. The integrated method for digital mandibular precision positioning and customized removable denture fabrication according to claim 1, characterized in that, In S5, after determining the jaw position based on the jaw position guide, a final silicone rubber impression of the patient's prosthesis restoration area is prepared, the midline, upper lip line, and corner of the mouth line are marked, a trial fitting is performed, the occlusal relationship at this time is recorded, a working model is made, a digital transfer table is printed, and the occlusal record obtained intraorally is used to cross the upper occlusal articulator.

6. The integrated method for digital mandibular precision positioning and customized removable denture fabrication according to claim 1, characterized in that, The final prosthesis is prepared using traditional injection molding, 3D printing, or cutting techniques, and the overall trial fitting is clinically evaluated in terms of aesthetics, pronunciation, and function.

Images