Document Detail

Evaluation of the effects of rapid maxillary expansion in growing children using computer tomography scanning: a pilot study.
MedLine Citation:
PMID:  17290015     Owner:  NLM     Status:  MEDLINE    
The principle of rapid maxillary expansion (RME) as a method to expand the transverse dimension of the palate and maxillary dental arch is by no means new, and previous studies have reported the effects of the method using a variety of radiographic methods. In the present study, the effect of a Hyrax splint appliance was studied in a group of nine growing children (six females, three males; mean age 8 years 1 month) undergoing orthodontic treatment. The changes were evaluated on pre- and post-treatment computer tomographic scans taken using a low-dosage protocol. The results demonstrated a clear appliance-induced effect in all patients, although the relative contribution of dental, alveolar, and skeletal changes varied from subject to subject. The average expansion, measured at the molar crowns, was 3.6 mm, whereas the actual sutural opening, the main aim of RME, was as low as 1.6 mm. The findings of this study raise doubts as to the efficiency of the Hyrax appliance and further comparative studies are recommended to evaluate other methods of maxillary expansion.
Birgit Podesser; Stephen Williams; Adriano G Crismani; Hans-Peter Bantleon
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  European journal of orthodontics     Volume:  29     ISSN:  0141-5387     ISO Abbreviation:  Eur J Orthod     Publication Date:  2007 Feb 
Date Detail:
Created Date:  2007-02-09     Completed Date:  2007-08-03     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  7909010     Medline TA:  Eur J Orthod     Country:  England    
Other Details:
Languages:  eng     Pagination:  37-44     Citation Subset:  D; IM    
Orthodontic Department, University of Vienna, Austria.
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MeSH Terms
Facial Bones / anatomy & histology*,  radiography
Orthodontic Appliances*
Palatal Expansion Technique / instrumentation*
Pilot Projects
Tomography, X-Ray Computed

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