Dentoskeletal features in individuals with ectopic eruption of the permanent maxillary first molar
Mucedero Manuela, Rozzi Matteo, Cardoni Giulia, Ricchiuti Maria Rosaria, Cozza Paola,
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( Mucedero Manuela ) - University of Rome Tor Vergata Department of Clinical Sciences and Traslation Medicine
( Rozzi Matteo ) - University of Rome Tor Vergata Department of Clinical Sciences and Traslation Medicine
( Cardoni Giulia ) - Private practice
( Ricchiuti Maria Rosaria ) - University of Rome Tor Vergata Department of Clinical Sciences and Traslation Medicine
( Cozza Paola ) - University of Rome Tor Vergata Department of Clinical Sciences and Traslation Medicine
KMID : 0361920150450040190
Abstract
Objective: The aim of the study was to analyze the prevalence and distribution of ectopic eruption of the permanent maxillary first molar (EEM) in individuals scheduled for orthodontic treatment and to investigate the association of EEM with dental characteristics, maxillary skeletal features, crowding, and other dental anomalies.
Methods: A total of 1,317 individuals were included and randomly divided into two groups. The first 265 subjects were included as controls, while the remaining 1,052 subjects included the sample from which the final experimental EEM group was derived. The mesiodistal (M-D) crown width of the deciduous maxillary second molar and permanent maxillary first molar, maxillary arch length (A-PML), maxillomandibular transverse skeletal relationships (anterior and posterior transverse interarch discrepancies, ATID and PTID), maxillary and mandibular tooth crowding, and the presence of dental anomalies were recorded for each subject, and the statistical significance of differences in these parameters between the EEM and control groups was determined using independent sample t -tests. Chi-square tests were used to compare the prevalence of other dental anomalies between the two groups.
Results: The prevalence of maxillary EEM was 2.5%. The M-D crown widths, ATID and PTID, and tooth crowding were significantly greater, while A-PML was significantly smaller, in the EEM group than in the control group. Only two subjects showed an association between EEM and maxillary lateral incisor anomalies, which included agenesis in one and microdontia in the other.
Conclusions: EEM may be a risk factor for maxillary arch constriction and severe tooth crowding.
키워드
Ectopic eruption; Tooth size; Crowding; Transverse maxillary deficiency
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