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Updated: Oct 25, 2026
Measuring Maxillary Posterior Tooth Movement: A Model Assessment using Palatal and Dental Superimposition
Published on: February 23, 2024
Effects of clear aligner attachment template sectioning on bonding accuracy and anterior retraction biomechanics: A
Qi Su1, Lijia Yang2, Lingyue Wu2
1The First Affiliated Hospital of Jinan University, Guangzhou, 510632 Guangdong, China; School of Stomatology, Jinan University, Guangzhou, 510632 Guangdong, China.
Objective:
To evaluate the effects of attachment template sectioning on bonding accuracy and the initial biomechanical response during en-masse anterior retraction with clear aligners.
Materials And Methods:
Thirty three-dimensional printed maxillary extraction models were assigned to full-arch, single-tooth, or sectional template groups. Attachment deviations were assessed using digital scanning, model registration, and three-dimensional measurements. Representative bonded attachments from each group were incorporated into finite element models to simulate anterior retraction after maxillary first-premolar extraction.
Results:
Mean attachment deviations were 0.041mm, 0.080mm, and 0.056mm in the full-arch, single-tooth, and sectional groups, respectively. The full-arch and sectional templates showed greater bonding accuracy than the single-tooth templates. Deviations generally increased toward the posterior region. Finite element analysis demonstrated tooth- and direction-specific changes in buccolingual, mesiodistal, and vertical displacement, with the most pronounced alterations in the single-tooth-template model.
Conclusions:
Template sectioning affected attachment bonding accuracy and initial displacement patterns during anterior retraction. Full-arch and sectional templates may be preferable for simultaneous bonding of multiple attachments, whereas the lower positioning stability of single-tooth templates should be considered during localized rebonding.