A jaw deviation measuring instrument based on 3D printing

Abstract

The present invention discloses a 3D-printed jaw deviation measuring instrument, which includes a U-shaped measuring instrument body, the measuring instrument body matches the dental arch, the tooth-fitting surface of the measuring instrument body is provided with tooth holes matching the dentition, and the arc-shaped outer end surface of the measuring instrument body is provided with a scale. The measuring instrument is designed based on the cusp-socket relationship of the maxillary dentition, and a scale is designed on the outer end surface of the measuring instrument, which can intuitively measure the patient's jaw deviation distance. The jaw deviation measuring instrument is printed using 3D printing technology, and the patient's maxillary plane and facial midline are obtained through a three-dimensional model to determine the offset distance of the mandible on the coronal midline. It is used to guide patients with mandibular deviation to perform rehabilitation training, so as to reduce patients' complications, increase patients' compliance with rehabilitation exercises, reduce the number of visits, reduce the workload of medical staff, and improve patients' quality of life.

Description

Technical Field

[0001] The invention belongs to the field of 3D printing, and in particular relates to a jaw deviation measuring instrument based on 3D printing. Background Art

[0002] 3D printing technology is a new manufacturing technology that emerged and developed in the late 1980s. Its principle is to use three-dimensional computer-aided design data, stack materials layer by layer through a 3D printer, and finally prepare a physical prototype. 3D printing can directly and quickly print the designed virtual objects into prototypes or manufactured parts with certain functions, with the advantages of precision and automation. At present, 3D printing technology has been widely used in biomedical fields such as orthopedics, rehabilitation medicine, oral and maxillofacial surgery. The causes of hemimaxillary deformity are relatively complex and can be divided into two categories: congenital and acquired. Among congenital factors, the three-dimensional development of the craniomaxillofacial bones on one side is insufficient due to embryonic development disorders; among acquired factors, it can be caused by trauma, infection, benign hyperplasia, bone tumors, soft tissue tumor compression and other reasons. Bone hemimaxillary deformity is a facial contour deformity caused by the asymmetry of the upper and lower jaws, which can occur in the maxilla or mandible. The oral and maxillofacial region has a unique, complex and delicate anatomical structure and physiological function. It not only represents personal appearance and image, but also takes into account multiple functions such as chewing, swallowing, language, and breathing.

[0003] Since orthognathic surgery changes the three-dimensional space of the patient's jaw, the patient needs time to establish a new level of oral mechanics, and the patient needs necessary rehabilitation treatment after surgery. Rehabilitation evaluation is an important part of the patient's functional rehabilitation, and its purpose is to provide feedback on whether the patient's rehabilitation behavior has achieved the rehabilitation goal. In terms of rehabilitation training evaluation, patients need to rely on the doctor's specialist examination and imaging examination. However, in the search of existing literature, there is no mention of simple, intuitive, and visual evaluation tools for patients. The effect of patients' rehabilitation exercises often needs to rely on the evaluation of medical staff, which not only increases the number of patients' visits and the possibility of complications, but also increases the workload of clinical medical staff, which reduces patients' compliance with rehabilitation training and their quality of life.

[0004] At present, there is still no tool suitable for self-rehabilitation evaluation of patients with jaw deformity in clinical practice. Compared with the cumbersome traditional measurement tools, it is urgent to design a tool with a surface visual scale to provide patients with a direct reference for rehabilitation training. Summary of the invention

[0005] The purpose of the present invention is to provide an individualized, visualized jaw deviation measuring instrument to help medical staff, nurses and patients accurately measure the degree of jaw deviation of patients, thereby solving the cumbersomeness and subjectivity of traditional measurement methods, thereby reducing postoperative complications, alleviating the workload of medical staff, and enhancing patients' confidence and behavior in rehabilitation training, so as to beautify the appearance of patients, promote functional recovery and improve their quality of life.

[0006] In order to achieve the above object, the present invention provides the following technical solutions:

[0007] A 3D printing-based offset jaw measuring instrument comprises a U-shaped measuring instrument body, the measuring instrument body matches the dental arch, a tooth-fitting surface of the measuring instrument body is provided with tooth holes matching the dentition, and a scale is provided on the arc-shaped outer end surface of the measuring instrument body.

[0008] Furthermore, the measuring instrument body has a thickness of 10-15 mm and a height of 5-10 mm.

[0009] Furthermore, the scale is marked with a 0 scale, which is set with the intersection of the facial sagittal midline and the coronal midline as the coordinate origin.

[0010] Furthermore, taking the 0 scale as a reference, scale lines of 1-2 cm are respectively arranged on the left and right sides of the 0 scale, and the accuracy of the scale lines is 0.1 cm.

[0011] Furthermore, the jaw deviation measuring instrument is made of silicone rubber.

[0012] Beneficial effects: The present invention provides a 3D-printed jaw deviation measuring instrument, which is designed based on the cusp-fossa relationship of the maxillary dentition, and a scale is designed on the outer end face of the measuring instrument, which can intuitively measure the patient's jaw deviation distance. The jaw deviation measuring instrument is printed using 3D printing technology, and the patient's maxillary plane and facial midline are obtained through a three-dimensional model to determine the offset distance of the mandible on the coronal midline. It is used to guide patients with mandibular deviation to conduct rehabilitation training, so as to reduce patients' complications, increase patients' compliance with rehabilitation exercises, reduce the number of visits, reduce the workload of medical staff, and improve patients' quality of life. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 The figure is a schematic diagram of the structure of the jaw deviation measuring instrument of the present invention.

[0014] Figure 2 It is a schematic structural diagram of the tooth fitting surface of the jaw deviation measuring instrument of the present invention.

[0015] Figure 3 This is a diagram showing the wearing effect of the jaw deviation measuring instrument of the present invention.

[0016] In the figure: 1. Measuring instrument body; 2. Scale; 3. 0 scale; 4. Tooth fitting surface. DETAILED DESCRIPTION

[0017] The present invention is further described below in conjunction with specific embodiments, but the embodiments are only exemplary and do not constitute any limitation to the scope of the present invention. It should be understood by those skilled in the art that the details and forms of the technical solution of the present invention can be modified or replaced without departing from the spirit and scope of the present invention, but these modifications and replacements all fall within the protection scope of the present invention.

[0018] A 3D printing-based jaw measurement instrument, such as Figure 1-2 As shown, the offset jaw measuring instrument comprises a U-shaped measuring instrument body 1, which matches the dental arch, a tooth-fitting surface 4 of the measuring instrument body 1 is provided with tooth holes matching the dentition, and a scale 2 is provided on the arc-shaped outer end surface of the measuring instrument body 1.

[0019] The measuring instrument body 1 has a thickness of 10-15 mm and a height of 5-10 mm.

[0020] The scale ruler 2 is marked with a 0 scale mark 3, which is set with the intersection of the facial sagittal midline and the coronal midline as the coordinate origin.

[0021] Taking the 0 scale mark 3 as a reference, scale marks of 1-2 cm are respectively arranged on the left and right sides of the 0 scale mark 3, and the accuracy of the scale marks is 0.1 cm.

[0022] The material of the jaw offset measuring instrument is silicone rubber, which has a certain hardness and will not cause occlusal deformation. It takes into account 3D printing and ensures the accuracy of measurement, while ensuring the comfort of patients when wearing and taking off. Figure 3 The figure is a diagram showing the wearing effect of the jaw deviation measuring instrument.

[0023] The method for manufacturing the 3D printing-based offset jaw measuring instrument comprises the following steps:

[0024] (1) Obtain the patient's maxillofacial imaging data and obtain the patient's jaw 3D data model:

[0025] Obtain maxillofacial CT images of the patient, with a CT scan layer thickness of 0.625 mm, and export the CT data in DICOM format for later use.

[0026] (2) Simulate the movement of the dentition and temporomandibular joint based on the three-dimensional data of the jaw and obtain the corresponding jaw movement trajectory data:

[0027] The patient's head CT data were imported into Mimics16.0 software for threshold segmentation and three-dimensional reconstruction to complete the relationship between the maxillary and mandibular offset positions.

[0028] (3) Design a personalized measuring instrument based on the acquired data:

[0029] The maxillary dentition was segmented and imported into the CAD software "SurgiCase CMF 5.0" in stl format. A personalized jaw offset measuring instrument was designed based on the maxillary dentition, and the scale lines were marked and exported in stl format.

[0030] (4) Produced based on the modeling data of the measuring instrument.

[0031] Output and print, use SLA-3D to print out a personalized jaw offset measuring instrument, mark the central scale in red and mark it as the 0 scale.

Claims

1. A 3D printing-based jaw measurement instrument. It is characterized in that The jaw deviation measuring instrument comprises a U-shaped measuring instrument body, the measuring instrument body is matched with the dental arch, the tooth-fitting surface of the measuring instrument body is provided with tooth holes matching the dentition, and the arc-shaped outer end surface of the measuring instrument body is provided with a scale, and the scale is used to determine the offset distance of the mandible on the coronal midline; The scale is marked with a 0 scale, which is set with the intersection of the facial sagittal midline and the coronal midline as the coordinate origin.

2. A 3D printing-based jaw offset measuring instrument according to claim 1, It is characterized in that The measuring instrument body has a thickness of 10-15 mm and a height of 5-10 mm.

3. The 3D printing-based jaw offset measuring instrument according to claim 1, It is characterized in that Taking the 0 scale as a reference, scale lines of 1-2 cm are respectively arranged on the left and right sides of the 0 scale, and the accuracy of the scale lines is 0.1 cm.

4. The 3D printing-based jaw offset measuring instrument according to claim 1, It is characterized in that The material of the jaw deviation measuring instrument is silicone rubber.

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