The Journal of Contemporary Dental Practice

Register      Login

SEARCH WITHIN CONTENT

FIND ARTICLE

Volume / Issue

Online First

Archive
Related articles

VOLUME 17 , ISSUE 10 ( October, 2016 ) > List of Articles

RESEARCH ARTICLE

Influence of Preadjusted Bracket Shape and Positioning Reference on Angulation of Upper Central Incisor

Osmar A Cuoghi, Francielle Topolski, Mauricio A de O Accorsi, Hugo J Trevisi, Ricardo Moresca

Citation Information : Cuoghi OA, Topolski F, de O Accorsi MA, Trevisi HJ, Moresca R. Influence of Preadjusted Bracket Shape and Positioning Reference on Angulation of Upper Central Incisor. J Contemp Dent Pract 2016; 17 (10):786-790.

DOI: 10.5005/jp-journals-10024-1931

Published Online: 01-10-2016

Copyright Statement:  Copyright © 2016; Jaypee Brothers Medical Publishers (P) Ltd.


Abstract

Aim

To verify the influence of different bracket shapes and placement references according to Andrews and MBT systems on the expression of angulation in upper central incisors (UCI).

Materials and methods

Bracket positioning and mesiodistal dental movement simulations were performed and the angulations produced in the dental crown were evaluated, based on computed tomography scan images of 30 UCI and AutoCAD software analysis. Rectangular (Andrews) and rhomboid (MBT) brackets were placed according to the references recommended by Andrews and MBT systems – long axis of the clinical crown (LACC) and incisal edge (IE) respectively.

Results

Data showed that the use of LACC as reference for bracket positioning produced 5° and 4° UCI angulations in Andrews and MBT brackets respectively. The use of IE produced a 1.2° mean angulation in UCI for both brackets.

Conclusion

When the LACC was used as reference for bracket positioning, the UCI crown angulation corresponded to the angulation built into the brackets, regardless of shape, while the use of IE resulted in natural crown angulation, regardless of bracket shape.

Clinical significance

This research contributes to guide the orthodontist in relation to the different treatment techniques based on the use of preadjusted brackets.

How to cite this article

Topolski F, de O Accorsi MA, Trevisi HJ, Cuoghi OA, Moresca R. Influence of Preadjusted Bracket Shape and Positioning Reference on Angulation of Upper Central Incisor. J Contemp Dent Pract 2016;17(10):786-790.


PDF Share
  1. Straight wire: the concept and appliance. San Diego: LA Wells Company; 1989.
  2. Evolution of treatment mechanics and contemporary appliance design in orthodontics: a 40-year perspective. Am J Orthod Dentofacial Orthop 2015 Jun;147(6):654-662.
  3. Variations in bracket placement in the preadjusted orthodontic appliance. Am J Orthod Dentofacial Orthop 1992 Jul;102(1):62-67.
  4. Bracket placement with the preadjusted appliance. J Clin Orthod 1995 May;29(5):302-311.
  5. Systemized orthodontic treatment mechanics. St. Louis: Mosby International Ltd; 2001.
  6. O aparelho pré-ajustado: sua evolução e suas prescrições. R Dental Press Ortodon Ortop Facial 2006 Jun;11(3):104-156.
  7. The six keys to normal occlusion. Am J Orthod 1972 Sep;62(3):296-309.
  8. Objective assessment of occlusal and coronal characteristics of untreated normals: a measurement study. Am J Orthod Dentofacial Orthop 2004 May;125(5):582-588.
  9. Effect of mesiodistal angulation of the maxillary central incisors on esthetic perceptions of the smile in the frontal view. Am J Orthod Dentofacial Orthop 2015 Sep;148(3):396-404.
  10. Esthetic perception of black spaces between maxillary central incisors by different age groups. Am J Orthod Dentofacial Orthop 2013 Mar;143(3):371-375.
  11. A comparison of accuracy in bracket positioning between two techniques – localizing the centre of the clinical crown and measuring the distance from the incisal edge. Eur J Orthod 2007 Oct;29(5):430-436.
  12. A new device (FAQ.FIX®) for orthodontic bracket placement in straight wire technique. Prog Orthod 2013 Aug;14(23):1-8.
  13. Comparison of the accuracy of bracket placement with height bracket positioning gauge and Boone gauge. J Dent Res Dent Clin Dent Prospects 2011 Fall;5(4):111-118.
PDF Share

© Jaypee Brothers Medical Publishers (P) LTD.