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    COMPUTING FINAL OCCLUSION WITH RESPECT TO TORQUE LOSS IN A THREE-DIMENSIONAL VIRTUAL ORTHODONTIC SYSTEM
    9.
    发明授权
    COMPUTING FINAL OCCLUSION WITH RESPECT TO TORQUE LOSS IN A THREE-DIMENSIONAL VIRTUAL ORTHODONTIC SYSTEM 有权
    在三维虚拟正畸系统中计算与扭矩损失有关的最终闭塞

    公开(公告)号：EP1817704B1

    公开(公告)日：2018-01-10

    申请号：EP05825657.9

    申请日：2005-10-31

    申请人： 3M Innovative Properties Company

    发明人： RABY, Richard E. ,  STARK, Nicholas, A.

    IPC分类号： G06F17/50 ,  A61C3/00 ,  A61C7/00 ,  A61C7/12

    CPC分类号： A61C7/12 ,  A61C7/002

    摘要： An orthodontic treatment planning system is described that models the effects of torque losses within an orthodontic archwire-appliance system when computing a predicted final occlusion for a dental arch. The treatment planning system models engagement of the archwire with the orthodontic appliances at each appliance position along the length of the archwire. The treatment planning system iteratively determines the twist angle of the archwire at each appliance position along the length of the archwire and incrementally adjusts the orientation and the position of each tooth based on the determined twist angles until the twist angle at each position along the archwire is within a defined tolerance of zero. When the twist angle at each position along the archwire is within a defined tolerance of zero, the archwire is relaxed and a 3D representation of the computed final occlusion of the dental arch may be displayed.