Pamela Uribe
University of Gothenburg, Sweden
Title: Clinical predictors for permanent maxillary canine impaction: A novel approach using a multivariate data analysis.
Biography
Biography: Pamela Uribe
Abstract
Background: Ectopic eruption and impaction of maxillary permanent canines is a frequently encountered clinical problem. A number of studies have been conducted in order to fi nd possible predicting/predisposing factors. Conventional univariate statistics have been used in these studies, which have led to disperse and potentially inaccurate results. Multivariate data analysis (MVDA) is a powerful tool for integration and interpretation of complex datasets, which can be used to avoid high numbers of false positives predictors. Aim: To fi nd possible predicting factors for impacted canines by using a comprehensive multivariate approach. Subjects and methods:Th is retrospective study included all patients referred for surgical exposure of impacted canines (n=45) to Mölndal Hospital, Sweden, during 2011. Age- and gender-matched orthodontic patients (n=45) with normally erupting canines were used as a control group. Th e age range for both groups was 11-17 years. Position of the canine (OPG radiographs), skeletal variables (profi le radiographs) and dentoalveolar traits (casts) were evaluated as possible predicting/predisposing factors for impaction. A MVDA was performed using SIMCA (MKS Umetrics, Sweden). Results: Th e vertical level and lateral distance of the impacted canines were positively correlated to impaction. None of the parameters evaluated either with profi le x-rays or casts were associated to impacted canines. Conclusion: Th e only factor that could be identifi ed as a positive predictor for impaction, using a MVDA approach, was the position of the impacted canine. Neither the profi le x-ray analysis nor the study cast analysis is adequate to predict canine impaction. Non-clinical parameters potentially associated with the etiology of impacted canines, such as inheritance and molecular factors regulating the eruption process, should be investigated in future studies. Clinical implication: A clinical examination of the canine eruption path at DS2M1 is recommended, and should be complemented with radiological and regular clinical supervision when ectopic eruption of the maxillary canine is suspected.
