Abstract: A cervical distractor is provided having an elongated rigid member having a plane and an axis in the plane; a plurality of arms supported by the elongated rigid member, at least one of the arms having an adjustable position along the axis of the elongated rigid member, and being lockable in position; and a pin-holder on each arm, the pin holder being continuously deflectable over a range about a pivot by a mechanism which is locked or frictionally-engaged in position, the mechanism being separated along the arm from the elongated rigid member by a hinge.

Abstract: An orthopedic instrument, comprising a pair of pivotally-connected arms, extending beyond a pivot axis of a first pivot; a pair of feet mounted to ends of the pair of pivotally-connected arms; and a quadrilateral linkage configured to maintain parallelism between the pair of feet over a range of angles and to selectively alter a distance between the pair of feet.

Abstract: An orthopedic instrument, comprising a pair of pivotally-connected arms, extending beyond a pivot axis of a first pivot; a pair of feet mounted to ends of the pair of pivotally-connected arms; and a quadrilateral linkage configured to maintain parallelism between the pair of feet over a range of angles and to selectively alter a distance between the pair of feet.