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Medicina is published by MDPI from Volume 54 Issue 1 (2018). Articles in this Issue were published by another publisher in Open Access under a CC-BY (or CC-BY-NC-ND) licence. Articles are hosted by MDPI on as a courtesy and upon agreement with Lithuanian Medical Association, Lithuanian University of Health Sciences, and Vilnius University.
Open AccessArticle

Factors Affecting Self-Eruption of Displaced Permanent Maxillary Canines

Department of Orthodontics, Medical Academy, Lithuanian University of Health Sciences
Department of Maxillofacial Surgery, Medical Academy, Lithuanian University of Health Sciences, Lithuania
Author to whom correspondence should be addressed.
Medicina 2011, 47(3), 22;
Received: 23 March 2011 / Accepted: 27 April 2011 / Published: 2 May 2011
The aim of this study was to examine the possibility of the spontaneous eruption of displaced unerupted maxillary canines after the extraction of the deciduous canine and dental arch expansion and to determine the impact of initial canine position on treatment success rate.
Materials and Methods
. The study sample included 50 patients (mean age, 13.5 years [SD, 2.2]) with unilaterally displaced unerupted maxillary canines. Deciduous canines were extracted, and the space for displaced canine was created at the beginning of the study. The follow-up period for the spontaneous eruption was 12 months. The initial vertical, horizontal, labio-palatal position and angle of inclination to the midline of the displaced canine were assessed on panoramic radiographs.
Results. Only 42% of displaced canines erupted spontaneously within one-year period (52.9% of labially displaced canines and 36.4% of palatally displaced canines). A significant difference of inclination was determined between spontaneously erupted and unerupted teeth in the labially displaced canine group (P<0.01), with no difference in the palatally displaced canine group. The receiver operating characteristic curve analysis showed that the critical angle of inclination for the spontaneous eruption of the retained canine was 20º (sensitivity 0.759; specificity 0.571; P<0.05). The majority of unerupted canines (75.9%) were inclined more than 20º. The initial height of canine was crucial for spontaneous eruption (sensitivity 0.966; specificity 0.81; P<0.001). This was true for both palatal and labial cases.
. The initial vertical position of the labially and palatally displaced canines and the inclination of the labially displaced canines were the most important predictors for spontaneous eruption of the cuspid.
Keywords: displaced canine; interceptive treatment displaced canine; interceptive treatment
MDPI and ACS Style

Smailienė, D.; Šidlauskas, A.; Lopatienė, K.; Guzevičienė, V.; Juodžbalys, G. Factors Affecting Self-Eruption of Displaced Permanent Maxillary Canines. Medicina 2011, 47, 22.

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