Home Subscription Services
 
   

 
World Journal of Orthodontics
WJO Home Page
About the Editor
Editorial Board
Reprints / Articles
Permissions
Advertising
MEDLINE Search
 
 
 
 
 
FacebookTwitter
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:
Winter 2010
Volume 11 , Issue 4

Back
Share Abstract:

Efficiency Of The Distal Screw In The Distal Movement Of Maxillary Molars

Mauro Cozzani, DMD, MScD/Francesco Zallio, MD, DDS/Luca Lombardo, DDS/Antonio Gracco, DDS

Pages: 341345
PMID: 21490999

Aim: Conventionally, noncompliance distal movement of molars relies exclusively on intraoral anchorage. The distal screw, a distal jet appliance supplemented by two paramedian mini-implants, is an innovative alternative. The aim of this study was to evaluate the suitability of this device to move molars bodily and distally. Methods: The effects of the distal screw were evaluated in a sample of 18 consecutively treated preadolescent and adolescent individuals (nine females and nine males; mean age at the start of treatment, 11.2 years). Two conical mini-implants (length 11.0 mm, diameter 1.5 to 2.2 mm) were placed in the anterior paramedian area of the palate of each patient. The coil springs of the device were activated to deliver a force of 240 cN per side. The dental and skeletal effects were investigated on pre- and posttreatment cephalometric radiographs. Results: The distal screw produced a Class I occlusion of the first molars by moving them distally 4.7 mm, which is more than conventional appliances can accomplish. Although this took longer than conventional devices (9.1 months), it had the advantage of a roughly 2.1-mm premolar distal movement (ie, no anchorage loss as with traditional techniques). Conclusions: The distal screw anchored by two palatal mini-implants allows not only translatory molar distal movement, but also distal movement of the maxillary first premolars, thereby avoiding characteristic anchorage loss. World J Orthod 2010;11:341345.

Key words: maxillary molar distalization, mini-implant, skeletal anchorage

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