Torque Control During Intrusion on Upper Central Incisor in Labial and Lingual bracket System - A 3D Finite Element Study

• Tejas R. Pol ^[1] ; Meghna Vandekar ^[2] ; Anuradha Patil ^[3] ; Sanjana Desai ^[4] ; Vikram Shetty ^[5] ; Saptarshi Hazarika ^[6]
  1. [1] Assistant professor Department of orthodontics, YMT Dental College and Hospital, kharghar, India
  2. [2] HOD < Professor ,Department of orthodontics, YMT Dental College and Hospital, kharghar
  3. [3] Associate Professor Department of conservative and Endodontics, Mgm dental college and hospital. New mumbai, India
  4. [4] Associate Professor, Karnavati dental college, Ahemdabad ,Gujrat, India
  5. [5] Professor Department of orthodontics, YMT Dental College and Hospital, kharghar, India
  6. [6] Lecturer Department of orthodontics, YMT Dental College and Hospital, kharghar, India

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• Localización: Journal of Clinical and Experimental Dentistry, ISSN-e 1989-5488, Vol. 10, Nº. 1 (January ), 2018, págs. 20-24
• Idioma: inglés
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• Resumen

  • The aim of present study was to investigate the difference of torque control during intrusive force on upper central incisors with normal, under and high torque in lingual and labial orthodontic systems through 3D finite element analysis.

    Six 3D models of an upper right central incisor with different torque were designed in Solid Works 2006. Software ANSYS Version 16.0 was used to evaluate intrusive force on upper central incisor model . An intrusive force of 0.15 N was applied to the bracket slot in different torque models and the displacements along a path of nodes in the upper central incisor was assessed.

    On application of Intrusive force on under torqued upper central incisor in Labial system produce labial crown movement but in Lingual system caused lingual movement in the apical and incisal parts. The same intrusive force in normal-torqued central incisor led to a palatal movement in apical and labial displacement of incisal edge in Lingual system and a palatal displacement in apical area and a labial movement in the incisal edge in Labial systemin.

    In overtorqued upper central incisor, the labial crown displacement in Labial system is more than Lingual system.

    In labial and lingual system on application of the same forces in upper central incisor with different inclinations showed different responses. The magnitudes of torque Loss during intrusive loads in incisors with normal, under and over-torque were higher in Labial system than Lingual orthodontic appliances.