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Table 3 Percentage changes in the various models according to the material of each component

From: Torque differences due to the material variation of the orthodontic appliance: a finite element study

Factor Group Absolute crown displacement (mm) Absolute apex displacement (mm) Equivalent elastic strain in PDL Von Mises stress in bracket (MPa)
Adhesive RMGI Ref (100%) Ref (100%) Ref (100%) Ref (100%)
  Composite resin +0% +0.2% −0.4% +0%
Bracket Titanium Ref (100%) Ref (100%) Ref (100%) Ref (100%)
  Stainless steel +10.8% +2.8% +3.1% +29.4%
  Ceramic +18.8% +4.2% +30.3% +59.3%
Ligature Elastomeric Ref (100%) Ref (100%) Ref (100%) Ref (100%)
  Stainless steel +3.0% +0.8% −12.9% +3.7%
Wire TMA Ref (100%) Ref (100%) Ref (100%) Ref (100%)
  Stainless steel +150.0% +84.2% +126.5% +117.9%
  1. PDL periodontal ligament, TMA titanium molybdenum alloy, RMGI resin-modified glass ionomer cement, Ref reference category consisting of the average across models with this material