Abstract: A fixation device, such as a bone screw, includes a bioresorbable proximal shaft portion and a non-bioresorbable distal threaded portion. In one aspect, the shaft portion is provided with a longitudinal throughbore which is aligned with a corresponding longitudinal bore in the proximal region of the threaded portion. A driver mechanism is employed to impart a rotary force so as to enable the device to be inserted into bone tissue. Afterwards, the driver mechanism is withdrawn from the respective bores. In another aspect, the non-bioresorbable distal portion is a substantially elongated solid member and includes a threaded distal region and a shaft-like proximal region. The comparatively smaller bioresorbable proximal region can mate with the distal portion either after or before the distal portion has been inserted into the bone tissue.

Abstract: A trailer frame and independent wheels including a stationary frame member with a tongue assembly attached and a pair of side bars with each side bar having a free end. Included is a movable frame member being positionable juxtapose the stationary frame member. The movable frame has a front bar and a pair of side bars and each side bar has a rear end. A pair of vertical supports project upwardly from an upper side of the movable frame member. A pair of wheel assemblies, with one each attached to one of the side bars of the movable frame member. Each wheel assembly having an axle arm with an interior end that is coupled between a pair of axle plates. The pair of axle plates are welded to the movable frame member and coupled to the free end of the stationary frame. A hub of each wheel assembly supports a tire rim with a tire. A pair of elongated suspension bands are provided. Each has an upper end bolted to the side bar of the movable frame and a lower end welded to the axle arm.