ArticleDental press journal of orthodontics2026
Dimensional stability of 3D-printed models for orthodontic aligners: a six-month storage evaluation.
Article in Dental press journal of orthodontics, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
objectiveThis study aimed to analyze the dimensional stability of 3D resin-printed models for orthodontic aligners under specific storage conditions over a period of up to six months.
methodsA model of the upper arch of a dental mannequin (Orbital Bone) was scanned using the 3Shape Trios 3 scanner, to create digital models (n = 20), which were printed on the Anycubic Photon X6 KS printer and stored in a dark box at room temperature for six months. Dimensional analysis was performed by comparing the meshes of the models through superimposition at the following time points: T0 - immediately after printing (control group), T1 - 1 month, T2 - 3 months, and T3 - 6 months of storage. The Ortho Analyser software was used for this purpose, and measurements were performed by a single, trained examiner. After confirming normality (p > 0.05, Shapiro-Wilk test), Analysis of Variance (ANOVA) was applied to verify dimensional changes in the following regions of the dental arch: incisors, canines, premolars, and molars.
resultsDimensional changes in the models were not statistically significant (p > 0.05) during the storage period for all evaluated regions. However, the greatest dimensional changes occurred during the first month and in the molar region (0.175 mm), which showed a tendency to expand.
conclusionsAfter six months of storage in a light-free environment, the 3D-printed models exhibited minor dimensional changes, which may have some clinical impact on aligner treatment, particularly in the molar region.
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