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Association between mesially displaced maxillary first premolars and early displaced maxillary canines

Type:  Articles

Pubblication date:  /1/2015

Authors:  M. Mucedero*, L. Franchi**, M.R. Ricchiuti*, P. Cozza***

Language:  English

Institution:  Department of Orthodontics, University of Rome "Tor Vergata", Rome, Italy *DDS, MS, Research Fellow **DDS, PhD, Assistant Professor Department of Surgery and Translational Medicine, Orthodontics, University of Florence, Florence, Italy ***MD, DMD, Professor and Department Chair

Publication:  European Journal of Paediatric Dentistry

Publisher:  Ariesdue Srl

Keywords:  Association of dental anomalies, Dental anomalies, Displaced maxillary permanent canine, Mesially displaced maxillary first premolars, Panoramic radiograph.

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Email:  [email protected]

Title:  Association between mesially displaced maxillary first premolars and early displaced maxillary canines

Abstract:  Aim To evaluate the association between the mesially displaced maxillary first premolar (MDP) and the early displacement of the adjacent permanent canine (EDC) before their eruption. Materials and methods A sample of 1247 subjects in the intermediate mixed dentition stage was assessed for the presence of MDP and EDC. All subjects were divided into two groups: MDP group and noMDP group. For each subject two angular measurements (premolar-occlusal plane η and Л premolar-midline angles) were analysed on panoramic radiographs. The chi-square test with Yates correction was performed to compare the prevalence rate of EDC in MDP (MDP-EDC) and noMDP groups. The statistical comparisons for the values of η and Л angles between MDP vs noMDP, MDP vs MDP-EDC, and noMDP vs MDP-EDC groups were performed by means of ANOVA with Bonferroni correction. Results The prevalence rate of EDC in the MDP group was significantly greater than in the noMDP group (66% vs. 12.1%). MDP-EDC group showed a significantly larger Л angle than in the MDP group resulting in an increased mesial inclination of displaced premolars. Conclusion MDP can be considered a dental anomaly associated to maxillary canine displacement.

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