title: Evaluation of the stresses generated by altering the bracket mesh base design in the bracket-cement-tooth continuum using the finite element method of stress analysis.
abstract: OBJECTIVE
  To analyze the influence of bracket base mesh geometry on the stresses generated in the tooth-cement-bracket continuum by a shear/peel load case and to compare the stress generated by three different loads (masticatory, peel, and twisting) on the bracket mesh base by employing a three-dimensional (3D) finite element computer model.
  
  
  METHODS
  A validated 3D finite element model of the bracket-cement-tooth system was constructed consisting of 40,536 nodes and 49,201 finite elements.
  
  
  RESULTS
  An increase in the diameter of the bracket mesh base wire resulted in a decrease in the stress at the enamel and cement. Increase in wire spacing (200 to 500 mm) increased the stresses in the enamel and cement at all wire diameters, but within the impregnated wire mesh, the major stress decreased with the increase in the wire spacing. Peel load produced comparatively less stress on enamel than masticatory and twisting force.
  
  
  CONCLUSIONS
  Alteration in mesh spacing and wire diameter influences the magnitude and distribution of stresses within the bracket-cement-tooth continuum. Peel load and twisting load are best to debond the bracket since they produced minimal stress on the enamel, which is suggestive of lower chances of enamel damage.
authors.affiliation: Department of Orthodontics and Dentofacial Orthopedics, Darshan Dental College and Hospital, Loyara, Udaipur, India. drdeepu20@yahoo.com
authors.forename: Tarulatha R
authors.initials: TR
authors.lastname: Shyagali
authors.forename: Chandralekha Basavaraj
authors.initials: CB
authors.lastname: Urs
authors.forename: Shashikala
authors.initials: S
authors.lastname: Subramai
authors.forename: Deepak P
authors.initials: DP
authors.lastname: Bhayya
mesh_terms: D003198:Computer Simulation; D001840:Dental Bonding; D003738:Dental Cements / Q000737:chemistry; D020342:Finite Element Analysis; D006801:Humans; D016910:Orthodontic Brackets; D013314:Stress, Mechanical; D013718:Tensile Strength
chemical_list: D003738:Dental Cements