Work

Pattern of change in force and moment according to amounts of labial tipping and material types of clear aligner: In vitro experiment with a six-axis mechanical sensor apparatus

Year: 2025

Type: article

Abstract: Objective: To investigate the pattern of change in force and moment according to the amounts of labial tipping and the material types of clear aligners (CA). Methods: A 3D-printed maxillary typodont system, including crown, root, and periodontal ligament space, was constructed. Six groups were established based on the amount of labial tipping of #12 (0.3 mm and 0.6 mm), and the material types (Zendura [thermoplastic, one-layer, 0.75 mm], Trioclear [thermoplastic, three-layer, 0.5 mm], and Graphy TA-28 [direct printing, 0.5 mm]) (n = 6/group). A six-axis mechanical sensor apparatus was connected to the roots. Force and moment were measured after seating the CA in a 37°C water bath. Results: < 0.01). Despite displaying unexpected force and moment directions, Graphy consistently exhibited the lowest absolute values among the groups. Conclusions: Clinicians should select the appropriate aligner material based on the specific biomechanical requirements to prevent unexpected forces and moments.

Source: The Korean Journal of Orthodontics

DOI: 10.4041/kjod25.003

Authors: Keun-Chul Cho, Il-Hyung Yang, Michael Lee, Ki Beom Kim, Seung-Hak Baek

Institutions: Seoul National University, Saint Louis University

Language: English

Topic: Orthodontics and Dentofacial Orthopedics

Subfield: Orthodontics

Field: Dentistry

Domain: Health Sciences

Open Access status: hybrid

Funder: Seoul National University Dental Hospital

Award: G3028444313