Document Detail

Mandibular lip bumper treatment and second molar eruption disturbances.
MedLine Citation:
PMID:  21536205     Owner:  NLM     Status:  In-Data-Review    
INTRODUCTION: Mandibular lip-bumper (LB) nonextraction treatment, usually started before complete second molar (M2) eruption, inevitably interacts with the development of the dentition. Yet, its effects on M2 eruption are still unknown. The first aim of this study was to retrospectively investigate whether LB therapy (260 patients) enhances the risk for M2 ectopic eruptions and impactions in comparison with 135 untreated subjects. The second aim was to assess, among treated patients (n = 197), the main potential determinants of M2 impaction and ectopic eruption.
METHODS: M2 eruption and impaction were determined on panoramic radiographs. To assess the predictive role of M2 inclination in relation to the first molar, a panoramic radiograph suitable for this measurement before treatment was required. The data were analyzed by using software (version 8.2, SAS, Cary, NC).
RESULTS: LB treatment significantly enhanced M2 impaction and ectopic eruption. Negative prognostic factors were found. An initial inclination of the M2 greater than 30° was significantly associated with a higher impaction risk compared with an angulation less than10°. LB treatment duration longer than 2 years increased the risk of ectopic eruptions.
CONCLUSIONS: While gaining space in the anterior arch, unwanted effects might be produced in the posterior arch. To be informed about these unplanned events is necessary to better optimize treatment.
Fabrizia Ferro; Gloria Funiciello; Letizia Perillo; Paolo Chiodini
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  American journal of orthodontics and dentofacial orthopedics : official publication of the American Association of Orthodontists, its constituent societies, and the American Board of Orthodontics     Volume:  139     ISSN:  1097-6752     ISO Abbreviation:  Am J Orthod Dentofacial Orthop     Publication Date:  2011 May 
Date Detail:
Created Date:  2011-05-03     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8610224     Medline TA:  Am J Orthod Dentofacial Orthop     Country:  United States    
Other Details:
Languages:  eng     Pagination:  622-7     Citation Subset:  D; IM    
Copyright Information:
Copyright © 2011 American Association of Orthodontists. Published by Mosby, Inc. All rights reserved.
Free Practitioner in Orthodontics, Naples, Italy.
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