October 2, 2025Progress in OrthodonticsOpen Access

Biomechanical effects of attachment designs in maxillary first molar mesialization with clear aligners: a finite element study

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Finite element analysis compared four attachment designs for maxillary first molar mesialization, suggesting optimized designs improve outcomes.

Optimized double semi-ellipsoidal attachments provided the best control in first molar mesialization.
Model-IV showed the least tipping with a total mesial crown displacement of 0.319 mm compared to 0.376 mm in Model-I.
Yin-Yang attachments reduced buccal displacement by 92% compared to no attachment, highlighting their efficacy.
Horizontal rectangular attachments minimized rotational movement during simulation, indicating design preferences matter.

Vatansever et al. (2025) studied this question.

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Finite element analysis compared four attachment designs for maxillary first molar mesialization, suggesting optimized designs improve outcomes.