Predicting the Progression of Tooth Loss from a 9-Year Cohort Study of 2300 Participants: Validation through Petri Nets

2023 Fiscal Year Final Research Report

• Project/Area Number: 21K17039
• Research Category: Grant-in-Aid for Early-Career Scientists
• Allocation Type: Multi-year Fund
• Review Section: Basic Section 57050:Prosthodontics-related
• Research Institution: Osaka University
• Principal Investigator: Mameno Tomoaki 大阪大学, 大学院歯学研究科, 助教 (50845922)
• Project Period (FY): 2021-04-01 – 2024-03-31
• Keywords: 歯の欠損パターン / 歯の喪失 / 大規模データ / 高齢者

Outline of Final Research Achievements

This study aimed to investigate changes in dentition patterns using longitudinal data obtained from a large cohort of community-dwelling older adults.
For the evaluation of dentition patterns, we employed Cummer's classification, which categorizes dentitions based on the presence of the left and right molar groups and the anterior group into 64 patterns. Based on the results of a 9-year survey of 922 individuals (463 men and 459 women), we analyzed changes in Cummer's classification from baseline to the 9-year follow-up using a machine learning model. The analysis revealed that the most frequent progression route involved the loss of all upper jaw blocks followed by the loss of the lower jaw blocks.

Free Research Field

歯科補綴学

Academic Significance and Societal Importance of the Research Achievements

本研究は，これまで多くの歯科医師がその臨床を通して抱いていると考えられる，“いつ，どのように新たな欠損が生じるか”という疑問に対して，縦断的な歯の欠損の動態を捉えることで，一定のエビデンスを示した．これは，患者個々のリスクに応じた医療を提供する，テーラーメイド歯科医療を実践するうえで重要な知見となると考えられる．