Publications by authors named "Ya-Ya Hong"
Effect of varying auxiliaries on maxillary incisor torque control with clear aligners: A finite element analysis.
Am J Orthod Dentofacial Orthop
July 2024
Article Synopsis
- This study evaluated how different attachments (auxiliaries) affect tooth movement and stress when using clear aligners to torque maxillary central incisors by 1°.
- Five models were tested: no auxiliaries (control), power ridge, semi-ellipsoid attachment, horizontal rectangular attachment, and horizontal cylinder attachment.
- The semi-ellipsoid attachment provided better stress distribution, while the power ridge offered better root control but caused a twist in the teeth.
Objectives: The objectives of this retrospective clinical study were to evaluate the efficacy of clear aligners on upper-incisor torque control, with the expectation of providing guidance for clinics.
Materials And Methods: Pretreatment (T0) and posttreatment (T1) cone-beam computed tomography (CBCT) scans of 47 patients with a nonextraction treatment using clear aligners were obtained and 120 upper-incisors with torque ≥5° were selected. Voxel-based superimpositions were performed using Dolphin imaging software and achieved movements were then measured.