WO2022186797A1

WO2022186797A1 - Carving of teeth 3d comparative control decision support system in dentistry education

Info

Publication number: WO2022186797A1
Application number: PCT/TR2021/051345
Authority: WO
Inventors: Koray SOYGUN
Original assignee: Cukurova Universitesi Rektorlugu
Priority date: 2021-03-02
Filing date: 2021-12-03
Publication date: 2022-09-09
Also published as: TR202104062A2

Abstract

In dentistry education, students' manuel dexterity increase by using different materials such as wax, soap or plaster in accordance with the anatomy of the tooth, which is explained after the theoretical training, by applying the characteristic features of the tooth on the object used. The invention relates to a decision support system that enables the object to be authenticated as a result of this practice, compared with healthy examples in the database, scoring and interactively displaying the student's deficiencies/errors.

Description

CARVING OF TEETH 3D COMPARATIVE CONTROL DECISION SUPPORT SYSTEM IN DENTISTRY EDUCATION TECHNICAL FIELD

In dentistry education, students gain manual dexterity by using different materials such as wax, soap, or plaster in accordance with the anatomy of the tooth, which is explained after the theoretical training, by applying the characteristic features of the tooth on the object used. The invention relates to a decision support system that enables the object to be authenticated as a result of this practice, compared with healthy examples in the database, scoring and interactively displaying the student's deficiencies/errors.

PRIOR ART

During the dentistry education, theoretical and practical applications are made from the 1 st to the 5th grade. Dental Anatomy course is given in the first year education in all dentistry faculties. After the theoretical lesson of this course is explained, students are asked to reflect the characteristic features of the teeth on the object used by using different materials such as wax, soap or plaster in accordance with the anatomy of the tooth. Using one of these materials, students do their carving teeth. The tooth made of wax, soap or plaster made by each student is evaluated and scored by the lecturer.

During the COVID 19 pandemic period, these applications were made with distance education. The students took pictures of the teeth they had made from different directions. These photographs were evaluated and scored by the faculty member. The number of students in faculties is increasing day by day. While the total number of dentistry student quotas in Turkey was 960 in 2005, it reached 7752 student quotas in 2020. This situation makes it impossible to evaluate the teeth made by the students and causes a great loss of time for the lecturer. In addition, it can lead to divergence from objective evaluations. In the known art, 3D comparison programs are used to compare the mold taken to make a prosthesis for the patient during dental treatment and the tooth made by the technician. This comparison is based on finding the differences between a negative mold and the product that comes out of this mold, and is not about making an evaluation. In addition, due to the unique jaw structure of each person and the problems arising from his lifestyle, it cannot be compared with a healthy tooth in the database. This type of system has been designed to assist the technician in making the prosthesis in accordance with the impression taken from the patient as much as possible, and it is not possible to use it for educational purposes.

DETAILED DESCRIPTION OF THE INVENTION

The invention is the main software that includes an artificial intelligence algorithm that enables the comparative analysis of the tooth carving created by the student, with the three-dimensional data containing the anatomy and morphology of each tooth in the library, through terminal software. As a result of this analysis, it is a decision support system that scores according to the score table created by the trainer, and then visually reinforces learning by showing the student's deficiencies / mistakes on the application in an interactive way.

Within the main software, the characteristic features of each tooth's labial/buccal, palatinal/lingual, mesial, distal and incisal/occlusal surface images, the size and direction of the contour and contour crests taken as a guide, and the internationally accepted data on the images of the maxillary right canine tooth library was created. In addition, the main software algorithm compares the data taken from the terminal, which belongs to which tooth, with the characteristic features of the labial/buccal, palatinal/lingual, mesial, distal and incisal/occlusal surface images of the healthy tooth in the library, the size and direction of the contour and contour crests, and the maxillary right canine characteristics prepares a detailed interactive visual analysis. Calculates a scoring recommendation based on the scoring criteria entered into the main software by the trainer. It shows the student's deficiencies/errors on the terminal screen with an interactive visual narrative through the comparative analysis report. Thus, a good education opportunity is provided by enabling the educator to see the deficiencies and mistakes of the students one-to-one without wasting any time during the exam.

Three-dimensional wax carved teeth made by students during homework/exam with the guidance of terminal software; The data generated using at least one of the five-axis scanners, such as digital camera, camera optics based on blue-light digital strip light projection, is sent by the terminal software to the main software. The use of occlusion sprays prior to scanning makes it possible to scan the carving of teeth by laser scanners. The images obtained after scanning the carving of teeth with a laser scanner are converted into STL (Standard Triangle Language) format, which represents the three-dimensional model with its own normal and three points of these triangles, which are created by dividing the surfaces of the designed model into many triangles in a mathematical sequence. STL images of the carving of teeth, the localization of the contour and contour crests of the teeth and their ratios with each other are determined by the main software algorithm, and a scoring proposal is prepared according to the scoring criteria determined by the trainer. An interactive visual narrative over the prepared scoring proposal and the student's deficiencies/errors comparative analysis report can be viewed on the student's terminal after the trainer's approval. Since it is an interactive system, students can forward their questions and objections to the educator via the terminal.

In an example scenario, after the trainer enters the student's information in the main software, the information about the tooth to be selected, this information is transmitted to the terminal software of the student. After the student completes the model, it is ready for scanning using occlusion sprays. Then, the data generated by scanning with the help of a digital camera or using at least one of the five-axis scanners or camera optics based on blue-light digital strip light projection are converted into STL format representing the three-dimensional model and sent to the main software. In the main software, the localization of the carving of teeth contour and contour crests and other features and their ratios are determined with STL images, and a scoring proposal is prepared according to the scoring criteria determined by the trainer. In addition, in this process, the student's deficiencies/errors are prepared in an interactive visual narrative over the comparative analysis report. After checking the comparative analysis report, visual training and scoring suggestion, the trainer makes and approves any changes/corrections. After the approval, an interactive visual explanation and the score obtained are sent to the student's terminal over the comparative analysis report of the deficiencies/errors. The student sends his/her questions and objections to the educator via the terminal, if any. The answers of the educator are sent to the student with the help of the terminal interface and the exam is terminated. Thanks to this decision support system, an educator has the opportunity to give exams and practical training to each student with the same efficiency by using his time in optimum efficiency. In addition, the standardization of the examination system criteria for all students allows for minimizing subjective evaluations. Seeing the mistake made by the student in a comparative interactive visual way will provide an opportunity to eliminate the deficiencies, as well as to check whether these deficiencies continue in the next exam. The decision support system, which is the subject of the invention, will thus minimize the disadvantages of distance education in such applications that require practical application, and will also be useful in applications made in the laboratory environment.

Claims

1. Carving of teeth 3d comparative control decision support system in dentistry education, and its characterized by;

- The characteristic features of the labial/buccal, palatinal/lingual, mesial, distal and incisal/occlusal surface images of each tooth, the size and direction of the contour and contour crests, With the help of internationally accepted data on the maxillary right canine teeth, the characteristic features of the labial/buccal, palatinal/lingual, mesial, distal and incisal/occlusal surface images of the healthy tooth in the library, including the healthy tooth library and indicating which tooth it belongs to, taken from the terminal and the dimensions and directions of the contour crests, The main software that prepares a detailed interactive visual analysis and scoring proposal by comparing it with the maxillary right canine features,

- - Carving teeth, which are made ready for scanning using occlusion sprays, it is characterized by containing terminal software that converts images created using digital camera or camera optics based on blue-light digital strip light projection into STL format and sends them to the main software.