上下颌模型正中状态下的虚拟对位

Virtual Orientation of the Lower and Upper Jaws Model on the Position of Centric Occlusion

我们通过圆柱面的特征识别技术建立了简单架转动轴线方程,该转轴便于实现下颌模型测量数据的旋转变换,进一步建立了上下颌模型正中碰撞特征点和特征区域,构成两个碰撞对,通过碰撞对的碰撞检查,实现了上下颌模型正中状态下的虚拟对位。从而建立了上下颌牙列面间的咬合关系,为缺牙虚拟咬合调整建立了基础,模拟了在铰链轴状态下的开闭口运动。

The rotation axis equation of the simple articulator is built by the cylinder feature identification, which facilitates the rotation transform of the lower jaw data. Then the collision points and areas on the position of centric occlusion are found to form two collision couples. The virtual orientation of the lower and upper jaws model is realized by collision detection of the collision couples. Consequently the occlusal relation between the lower and upper jaws is established. It sets a good basis for the virtual adjustment of edentulous occlusal surface. The jaw movement of opening and closing in the state of hinge axis is also simulated accordingly.