Influence of rapid maxillary expansion on the root resorption of primary canines used as anchorage

Omar Gabriel da SILVA FILHO, Rodrigo Silva CALDAS, Patrícia Zambonato de FREITAS, Flávio Mauro FERRARI JUNIOR

Aim: The current radiographic, retrospective longitudinal study aim was to demonstrate whether the Haas fixed appliance, modified for the primary and mixed dentitions, interferes in the velocity of the root resorption and exfoliation of the primary canines. Methods: It was evaluated the amount of root resorption of primary canines on the basis of measurements of the apex-crown length of right and left upper primary canines. For this measurement twenty-four children submitted to rapid maxillary expansion (RME) in the primary and mixed dentition were compared to 15 children who did not undergo such a procedure. The measurement of the apex-crown length of the primary canines was achieved with the CEF-X program that allowed the calibration and standardization of the image size. Results: Statistical data revealed that no difference was found in the velocity of root resorption of the primary canines between the control and experimental groups. Conclusions: The findings of this study allow us to conclude that root resorption of primary canines has no relationship with RME.

Keywords: Maxillary expansion. Malocclusion. Root resorption. Orthodontics. Interceptive.

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