A comparative assessment of torque capabilities between lingual and labial brackets using three-dimension finite element
10.3969/j.issn.1001-3733.2016.03.010
- VernacularTitle:唇舌侧托槽转矩控制性能的有限元对比分析
- Author:
Siyuan HUANG
;
Ji ZHOU
;
Yue HUANG
- Publication Type:Journal Article
- Keywords:
Lingual and labial brackets;
Torque;
Three-dimensional finite element;
Mechanical properties
- From:
Journal of Practical Stomatology
2016;32(3):345-349
- CountryChina
- Language:Chinese
-
Abstract:
Objective:To analyse the difference of torque performance between lingual and labial brackets as well as the influence of the archwires of different materials with different dimension on the torque capability of lingual brackets.Methods:The 3D finite mo-del of lingual and labial brackets from the right upper canine to the left upper canine was established,all brackets were with 0.56 mm slot size.The center of the bracket slot of the left upper central incisor was used as the central point and the two brackets were rotated clockwise and counterclockwise with a rotation angle of ±20°along the horizontal axis of bracket slot.The torque load on the left up-per central incisors with different materials and dimensions of the archwires was simulated.Results:The torque force of both lingual and labial brackets increased with the increase of rotation angle and the elastic modulus of archwire.The lingual archwire generated torque force was nearly 3 -5 times more than the labial system under the same torque angle.The torque value generated with 0.48 mm ×0.64 mm archwires was greater than 0.43 mm ×0.64 mm.The lingual bracket generated torque force decreased gradually from nickel-titanium(NiTi),Beta-titanium(TMA)to stainless steel(SS)under the same dimension.Conclusion:Torque moments of lin-gual and labial brackets both increases with the increase of torque angle in each operating condition.The lingual orthodontic brackets produce more torque force than labial brackets under the same torque angle.Torque performance of lingual bracket was affected by the material and dimension of the archwires.
