Author/Editor		Biščević, Mirza; Smrke, Dragica
Title		Knee joint models and techniques for measurement of joint motion
Type		članek
Source		Acta Inform Med
Vol. and No.		Letnik 14, št. 2
Publication year		2006
Volume		str. 67-72
Language		eng
Abstract		There are five types of the knee joint model which consist of the six DOF spatial joint and four simplifications of the 6 DOF joints the hinge joint model, the planar joint model, the z DOF spherical joint model, the ball and socket 3 DOF spherical model, and the 6 DOF spatial model. Spatial motions consist of three rotational and three transitional displacements. Rotational displacements in the knee are defined as flexion/extension about an axis in the medal-lateral direction; abduction/adduction about an axis passing through the center of the knee in the anterior-posterior direction and usually linked to the tibia, and internal/external rotation about an axis along the tibia. The three translational displacements are defined as medial-lateral shift along an axis in the medio-lateral direction; anterior-posterior draw along an axis in the anterior-posterior direction with respect to the tibia and compression-distraction along the proximal-distal length of the tibia. Joint motion has been measured in a variety of ways: electrical linkage devices, radiographic methods, video systems, electromagnetic devices, and others systems. The choice of method is driven by the type of joint model employed, the cost, as accuracy required and other experimental limitations associated with in vivo or in vitro work. Description of motion must also be consistent with the available data.
Descriptors		KNEE JOINT RANGE OF MOTION, ARTICULAR MODELS, THEORETICAL