Abstract: An orthopedic fixation device includes a fixation plate having at least one through hole in which a direction adjusting ring is held securely. The direction adjusting ring is provided with an inner threaded hole engageable with a second threaded portion of a double-threaded bone screw. Located at a lower portion of the double-threaded bone screw is a first threaded portion which is fastened onto a bone or vertebra. Located at the top end of the double-threaded bone screw is a head for urging and spreading a plurality of arresting edges located at the upper side of the direction adjusting ring so as to cause the direction adjusting ring to be retained securely in the round through hole of the fixation plate. The axis of the threaded hole of the direction adjusting ring forms with the axis of an outer ring body of the direction adjusting ring an angle ranging between 3 and 15 degrees.

Abstract: A locking plate system has multiple locking pins, each with one end formed as a screw to lock in the pending fixation bones or vertebral tubercles, with another end defining rectangular or similarly shaped locking post having a threaded locking end. Near the locking post end, there is formed a stopping protrusion. A plate defines multiple locking bores disposed at one side to be placed over the locking post end until the plate reaches the stopping protrusion on the locking pin. The plate defines multiple threaded screwing bores near the other side to receive locking pin screw. Multiple locking devices fix the side of the plate having locking bores to the locking post end of its locking pins. Multiple screwing pins each have one end formed as a pin to be used for penetrating the the threaded screwing bore to lock into the bone or the vertebral tubercle. Another end which forms a head is for holding against the threaded screwing bore of the plate.