Authors : Dr. Phalguni Warate; Dr. Sunikumar Pulluri; Dr. Akash Lavate; Dr. Sneha Hoshing; Dr. Sneha Shinde; Dr. Madhura Wagh

Volume/Issue : Volume 9 - 2024, Issue 6 - June

Google Scholar : https://tinyurl.com/mur8y7pv

Scribd : https://tinyurl.com/zn3e37ns

DOI : https://doi.org/10.38124/ijisrt/IJISRT24JUN299

Abstract : Torsion in an "archwire" that forms a pair when it interacts with a "bracket slot" produces torque. The archwire moves the tooth through the torsional tension created in the activated state, depending on the degree of torsion, the size and quality of the wire, and the deformability of the bracket. The dimensions of the bracket hole may unintentionally vary when brackets are made. Therefore, the purpose of this study was to evaluate the accuracy of built-in torque from various manufacturers.  Objective:- To measure and analyse the built-in torque of the maxillary right canine brackets, maxillary right lateral canines, and maxillary right central incisors from commercially available bracket systems (JJ Orthodontics, American Orthodontics, Koden Orthodontics, Desires - Ozone series). The brackets will be measured in 0.022 inches.  Material and Method:- The sample was made up of three brackets from each company (maxillary central incisor, lateral incisor, and canine), the torque of which was measured in a dimension of 0.022 inches. Using a stereomicroscope, images were captured, measurements were made following operator calibration with IMAGE PROPLUS, and a digital readout was generated.  Results:- In practically every bracket, the built-in torque mean values were lower. The built-in torque levels were most similar to the American Orthodontics standard values.

Keywords : Orthodontic Brackets, Torque, Stereomicroscope, MBT Prescription

References :

1. Wagner JA, Nikolai RJ. Stiffness of incisor segments of edgewise arches in torsion and bending. Angle Orthod. 1985;55:37–50.
2. Harzer W, Bourauel C, Gmyrek H. Torque capacity of metal and polycarbonate brackets with and without a metal slot. Eur J Orthod. 2004;26:435–441.
3. Pandis N, Strigou S, Eliades T. Maxillary incisor torque with conventional and self-ligating brackets: a prospective clinical trial. Orthod Craniofac Res. 2004.
4. 4.Streva AM, Cotrim-Ferreira FA, Garib DG, Carvalho PEG. Are torque values of preadjusted brackets precise? J Appl Oral Sci. 2011;19(4):313-317.
5. O’Higgins EA, Kirschen RH, Lee RT. The influence of maxillary incisor inclination on arch length. Br J Orthod. 1999;26(2):97-102.
6. Cash AC, Good SA, Curtis R V, McDonald F. An evaluation of slot size in orthodontic brackets—Are standards as expected? Angle Orthod. 2004;74(4):450-453.
7. Gioka C, Eliades T. Materials-induced variation in the torque expression of preadjusted appliances. Am J Orthod Dentofac Orthop. 2004;125(3):323-328.
8. Zinelis S, Annousaki O, Eliades T, Makaou M, Zinelis S, Annousaki O, Eliades T, Makou M. Elemental composition of brazing alloys in metallic orthodontic brackets. Angle Orthod. 2004;74(3):394-399.
9. Aditya. G. et al. Slot .022” MBT bracket torque accuracy (Evaluation of scanning electron microscopy- Research Article). Cited – 2013.
10. Kapur. et al. Comparision of load transmission & bracket deformation between titanium & stainless steel brackets. Am J Orthod Dentofac Orthop1999; 116:275-8.
11. Siatkowski RE. Loss of anterior torque control due to variations in bracket slot and archwire dimensions. J Clin Orthod. 1999;33(9):508-510.