Home Subscription Services
 
   

 
World Journal of Orthodontics
WJO Home Page
About the Editor
Editorial Board
Reprints / Articles
Permissions
Advertising
MEDLINE Search
 
 
 
 
 
FacebookTwitterYouTube
Quintessence Publishing: Journals: ORTHODONTICS
ORTHODONTICS
The Art and Practice of Dentofacial Enhancement

Formerly World Journal of Orthodontics

Edited by
Rafi Romano, DMD, MSc (Editor-in-Chief)

ISSN 2160-2999 (print) / ISSN 2160-3006 (online)

Visit the ORTHODONTICS: The Art and Practice of Dentofacial Enhancement Facebook page

Publication:
Fall 2007
Volume 8 , Issue 3

Back
Share Abstract:

Rapid maxillary expansion with THE Hyrax appliance: an occlusal radiographic evaluation study

Karina Santos Mundstock, DDS, MS, PhD / Gustavo Barreto, DDS, MS, PhD / Aparecida Fernanda Meloti, DDS / Milena Andrade Araújo, DDS / Ary dos Santos-Pinto, MS, PhD / Dirceu Barnabe Raveli, MS, PhD


PMID: 17902332

Aim: To evaluate, via occlusal radiographs, transversal alterations that result from rapid maxillary expansion with the Hyrax appliance. Methods: The sample consisted of 14 children of both genders, in mixed dentition, with unilateral or bilateral posterior crossbite. Occlusal radiographs were taken at the beginning and at the end of maxillary expansion. The following variables were measured: intermolar distance, interincisal distance, incisor interapex distance, interbase distance, interarm distance, and interincisor inclination. The interapex and interbase distances had their radio-graphic amplification corrected. Results: A mean opening of 7.65 mm of the expansion screw resulted in an increase of the intermolar distance of 7.40 mm, progressively smaller increases of the interarm distance of the appliance of 6.6 mm, and of the incisor interapex distance of 5.5 mm. The distance between the maxillary incisors increased 1.9 mm, which indicated more posterior than anterior expansion. In addition, some buccal inclination of the molars was found, but the apexes of the incisors opened 1.9 mm less than the intermolar distance. Incisor inclination changed 9.7 degrees as a result of the rapid maxillary expansion therapy. Conclusions: Analyzing the occlusal radiographs, the dental arch showed more posterior than anterior opening and a change of 9.72 degrees in incisor angulation as a result of rapid maxillary expansion. World J Orthod 2007; 8: 277–284.

Full Text PDF File | Order Article

 

 
Get Adobe Reader
Adobe Acrobat Reader is required to view PDF files.
This is a free program available from the Adobe web site.
Follow the download directions on the Adobe web site
to get your copy of Adobe Acrobat Reader.
  © 2014 Quintessence Publishing Co Inc
 

Home | Subscription Services | Books | Journals | Multimedia | Events | Blog
Terms of Use | Privacy Policy | About Us | Contact Us | Advertising | Help | Sitemap | Catalog