Abstract: A multi-axis spinal fixation device includes a supporting pole having a threaded shaft at one end and a connecting seat at the other, wherein the connecting seat comprises a U-shaped recess; a brace rod installed across the U-shaped recess; a fastener fastening the brace rod in the recess; and a stabilizing piece disposed between the supporting pole and the fastener, the stabilizing piece having a curved surface at its one end facing the brace rod such that the stabilizing piece is in surface contact with the brace rod.

Abstract: A spinal plate element adjusting device having a threaded engagement is provided that includes a cylindrical hollow body and a pushing member having the shape of a frustum of a cone. The outer wall of the body is formed with a threaded portion of predetermined length. The threaded portion is divided into several portions by slits. An outer wall of the pushing member is formed with an external thread for threaded engagement with the internal thread of the body. When the spinal plate element adjusting device is to be implanted between two of the patient's vertebrae, the body is screwed into the area between two vertebrae by the externally threaded portion. By virtue of the taper of the pushing member, the threaded portion of the body is expanded to have a predetermined slope for supporting and buffering the vertebrae of the patient.