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Comparison of slot wall deformation in conventional and self-ligating brackets during torque with TMA wire - A finite
C Keerthana1, P Siri Krishna1, Pavan Kumar1
1Department of Orthodontics and Dentofacial Orthopedics, Bangalore Institute of Dental Sciences, Bengaluru, Karnataka, India.
Abstract:
Slot wall deformation occurs when twisting of the wire is increased. Therefore, it is of interest to evaluate deformation in conventional, active and passive self-ligating stainless steel and ceramic brackets with 0.019 X 0.025inch TMA wire. Deformation of slot wall with TMA wire was least in ceramic passive self- ligating bracket ranging from 0.02 to 0.50 mm and highest in Stainless steel conventional bracket anging from 0.097 to 2.04 mm. Sequence of brackets from least to high slot wall deformation is Ceramic Passive Self-ligating bracket, Ceramic Active Self-ligating bracket, Stainless steel Passive Self-ligating bracket, Ceramic conventional bracket, Stainless steel Active Self-ligating bracket and Stainless-steel conventional bracket. Thus, elastic deformation of stainless-steel bracket slot was more than ceramic bracket slot.
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