Home Subscription Services

World Journal of Orthodontics
WJO Home Page
About the Editor
Editorial Board
Reprints / Articles
Quintessence Publishing: Journals: 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

Spring 2004
Volume 5 , Issue 1

Share Abstract:

Plastic Brackets: Hardness and Associated Clinical Implications

Theodore Eliades, DDS, MS, Dr Med, PhD/Christiana Gioka, DDS/Spiros Zinelis, PhD/George Eliades, DDS, Dr Dent/Margarita Makou DDS, MS, Dr Dent

Pages: 6266
PMID: 15615144

Aim: To assess the Vickers hardness of plastic brackets, after in vitro aging. The morphology and structure of corresponding retrieved brackets were also studied to assess the reliability of in vitro set-up in imposing effects comparable to intraoral aging. Materials and Methods: Four types of plastic brackets were selected. Specimens were immersed in a buffer solution to induce artificial aging; brackets of two groups were retrieved after orthodontic treatment. The wings of brackets were subjected to Knoop hardness testing, and scanning electron microscopy was employed to study the morphology and microstructure of retrieved brackets. The results were statistically analyzed by two-way analysis of variance and Tukey test ( = 0.05). Results: Differences were identified between the brands of brackets, but not between the new and in vitro-aged appliances. The retrieved appliances showed significant reduction in hardness when compared with their as-received counterparts. Evidence of degradation was seen in the retrieved appliances. Conclusions: The inability of ex vivo experimental configuration to simulate clinical conditions is stressed; several clinical implications related to torque control, friction, and tie-wing strength of brackets are discussed. World J Orthod 2004;5:6266.

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.
  © 2015 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