There are two main types of dado joints ... t have the strength of a mortise-and-tenon or tongue-and-groove joint. Sufficient torque on the far end of the inserted material will make the the ...

Ball and socket joints also allow types of movement called abduction, adduction, rotation and circumduction. Abduction – movement away from the midline of the body. This occurs at the hip and ...

The different types of movement that are permitted at each joint are described below. Flexion – bending a joint. This occurs when the angle of a joint decreases. For example, the elbow flexes ...