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Simulation of Non-Carious Cervical Lesions by Computational Toothbrush Model: A Novel Three-Dimensional Discrete Element Method

Nam Department of Mechanical Design Engineering, Kumoh National Institute of Technology, 61, Daehak-Ro, Gyeungbuk, Gumi, 39177, South Korea|
Junyoung (55716954600) | Seok-Mo (7005363361); Park | Seungjun (57719546300); Heo Department of Periodontology, School of Dentistry, Jeonbuk National University, Jeonbuk, Jeonju, 54907, South Korea| Duong Hong (56662332100); Lee Department of Aeronautic, Mechanical and Electrical Convergence Engineering, Kumoh National Institute of Technology, 61, Daehak-Ro, Gyeungbuk, Gumi, 39177, South Korea| Jinsu (57208148041); Nguyen Techno Vietnam Co., JSC., TSQ Living Area (Euroland), Mo Lao Ward, Ha Dong District, Hanoi City, 12110, Viet Nam|

Sensors Số 11, năm 2022 (Tập 22, trang -)

ISSN: 14248220

ISSN: 14248220

DOI:

Tài liệu thuộc danh mục:

Article

English

Từ khóa: Computer Simulation; Humans; Research Design; Stress, Mechanical; Tooth Abrasion; Toothbrushing; Abrasion; Numerical methods; Acid erosion; Cervical lesions; Connected particle model; Discrete elements method; Interproximal; Non-carious cervical lesion; Particle modeling; Three-dimensional Discrete Element Methods; Tooth brushing; Toothbrush; adverse event; computer simulation; human; mechanical stress; methodology; pathology; tooth brushing; tooth disease; Erosion
Tóm tắt tiếng anh
Non-carious cervical lesions (NCCLs) are saucer-shaped abrasions of a tooth. NCCLs can form due to various etiologies, including toothbrushing wear, acid erosion, and mechanical stress. Owing to this complex interplay, the mechanism of NCCLs in tooth abrasion has not been established. This study aims to develop a numerical method using a computational toothbrush to simulate NCCLs. The forces acting on the teeth and the amount of abrasion generated were evaluated. The discrete element method using in-house code, connected particle model, and Archard wear model were applied for brushing. In the toothbrush model, 42 acrylic tufts were fixed into a toothbrush head. The teeth models with enamel properties comprised four flat plates and two grooves to simulate the anterior teeth and NCCLs. The brushing speed and depth for one cycle were established as simulation parameters. The force applied within the ununiform plane was concentrated on several bristles as the toothbrush passed through the interproximal space. The brushing force (depth) had a greater effect on tooth abrasion than the brushing speed. Toothbrushing abrasion was mainly concentrated in the interproximal space. Therefore, forceful tooth brushing can cause NCCLs from the interproximal space to the cervical area of the tooth. � 2022 by the authors. Licensee MDPI, Basel, Switzerland.

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