Three-dimension motion and deformity of spine: a comparative study of description methods
WANG Hai-Meng, JIANG Hui, DIAO Wei-Dong, CHENG Yong-Quan, CHEN Jian-Ting
Chinese Journal of Clinical Anatomy ›› 2013, Vol. 31 ›› Issue (3) : 337-341.
Three-dimension motion and deformity of spine: a comparative study of description methods
Objective To compare the projection angles method, the Euler angles method, the helical axis method and the tilt/twist angles method for their uses of the description of 3D spinal motion and deformity. Methods 3D Schematic diagrams of the four description methods based on precise calculation were drawn, the features of the methods are compared with their strengths, weaknesses discussed. Results In 3D description, the projection method has shortcomings but the Euler method and the helical axis method have superiority. The tilt/twist method is Euler method which is in special sequence but fits reality more. Conclusions Though the practical significance of the numerical results need further investigation, these methods are of value to etiology, simulated surgery and robot-assisted surgery of idiopathic scoliosis.
Projection angels / Euler angles / Helical angles / Idiopathic scoliosis / Orthopaedics / Biomechanics
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