2026-04-17T19:08:52Zhttps://recercat.cat/oai/request

oai:recercat.cat:2445/2288522026-04-14T09:21:37Zcom_2072_1057col_2072_478916col_2072_478917col_2072_478927

Prediction of traction time for the alignment of impacted maxillary canines Rosa Gay, María Cristina de la Valmaseda Castellón, Eduardo Barbosa de Figueiredo, Rui Pedro Hernández Mangas, Andrea Camps Font, Octavi Ortodòncia Tracció animal Gossos Orthodontics Animal traction) Dogs Background To identify which factors influence the traction time of impacted maxillary canines using a combined orthodontic-surgical approach and to create a multivariate model to predict canine traction time. Methods Patients undergoing traction of impacted maxillary canines by a single orthodontist were selected. Seventy patients (mean age±SD): 19.32±8.81) meeting the inclusion criteria were enrolled in the study. They had 89 impacted canines (69 palatally displaced and 20 in a buccal position). Variables that could be related to orthodontic treatment as a whole and to impaction and its treatment were recorded for each patient. The treatment predictors were explored by univariate Cox regression and multivariate generalized linear mixed models (GLMM). A multivariate analysis was performed using a mixed-effects parametric survival analysis (MMPSA) Weibull model to assess the contribution of each of the predictive variables and to create a multiple linear regression model to explain canine traction time. Results Cox regression showed significant association between traction time and age (p=0.013) and the number of failed appointments (p<0.001). An MMPSA Weibull model to build a predictive model based on the Akaike information criterion (AIC) showed that interceptive maxillary expansion significantly reduced traction time (p=0.002). In contrast, traction time increased with a wider angle of the impacted canine relative to the midline, with missed appointments, and with radiological overlap with lateral or central incisors. Conclusions The orthodontic treatment time to align impacted maxillary canines increases with radiological overlap with lateral and central incisors, a wider angle to the midline, the absence of interceptive maxillary expansion, and missed appointments. 2026-04-13T07:42:02Z 2026-04-13T07:42:02Z 2026-01-20 2026-04-13T07:42:02Z info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 1472-6831 https://hdl.handle.net/2445/228852 766581 41345570 https://hdl.handle.net/2445/228852 eng Reproducció del document publicat a: https://doi.org/10.1186/s12903-025-07181-x BMC Oral Health, 2026, vol. 26, num.1 https://doi.org/10.1186/s12903-025-07181-x cc-by (c) Rosa Gay, María Cristina de la et al., 2026 http://creativecommons.org/licenses/by/4.0/ info:eu-repo/semantics/openAccess 13 p. application/pdf BioMed Central