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Factors Affecting Self-Eruption of Displaced Permanent Maxillary Canines.
MedLine Citation:
PMID:  21822038     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
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. CONCLUSIONS. 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.
Authors:
Dalia Smailienė; Antanas Sidlauskas; Kristina Lopatienė; Vesta Guzevičienė; Gintaras Juodžbalys
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Publication Detail:
Type:  JOURNAL ARTICLE    
Journal Detail:
Title:  Medicina (Kaunas, Lithuania)     Volume:  47     ISSN:  1648-9144     ISO Abbreviation:  -     Publication Date:  2011  
Date Detail:
Created Date:  2011-8-8     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9425208     Medline TA:  Medicina (Kaunas)     Country:  -    
Other Details:
Languages:  ENG     Pagination:  163-169     Citation Subset:  -    
Affiliation:
Department of Orthodontics, Medical Academy, Lithuanian University of Health Sciences, J. Lukšos-Daumanto 6, 50106 Kaunas, Lithuania. antanas@kaunas.omnitel.net.
Vernacular Title:
Viršutinių retinuotų iltinių dantų savaiminį išdygimą lemiantys veiksniai.
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