Abstract: A piezoelectric material member includes a piezoelectric body, an upper electrode and a lower electrode. The upper electrode and the lower electrode are disposed on different sides of the piezoelectric body. The upper electrode has a first upper electrode section and a second upper electrode section separated from the first upper electrode section. The lower electrode has a first lower electrode section and a second lower electrode section separated from the first lower electrode section. The first lower electrode section is coupled to the first upper electrode section, so that the piezoelectric body generates a first frequency via the first lower electrode section and the first upper electrode section. The second lower electrode section is coupled to the second upper electrode section, so that the piezoelectric body generates a second frequency via the second lower electrode section and the second upper electrode section.

Abstract: A vertebral fixation plate assembly for insertion into the resection site between two vertebrae of a patients vertebral column and fixation to front or lateral side of the two adjacent vertebral bodies above and below the resection site by means of surgical implantation is disclosed to include a fixation plate that has a plurality of round holes and elongated holes and an opening on the middle, a plurality of bone screws respectively inserted through the round holes and elongated holes for fastening the fixation plate to the patient's vertebral column, and a cage affixed to the opening on the fixation plate and holding holes cut through the periphery for bone fusion and grow. The cage is linked to a vertebral spacer for artificial vertebrae by means of bone fusion to prevent vertebral sinking or slipping of the vertebral spacer and to improve bone fusion efficiency.

Abstract: A vertebral fixation plate assembly for insertion into the resection site between two vertebrae of a patients vertebral column and fixation to front or lateral side of the two adjacent vertebral bodies above and below the resection site by means of surgical implantation is disclosed to include a fixation plate that has a plurality of round holes and elongated holes and an opening on the middle, a plurality of bone screws respectively inserted through the round holes and elongated holes for fastening the fixation plate to the patient's vertebral column, and a cage affixed to the opening on the fixation plate and holding holes cut through the periphery for bone fusion and grow. The cage is linked to a vertebral spacer for artificial vertebrae by means of bone fusion to prevent vertebral sinking or slipping of the vertebral spacer and to improve bone fusion efficiency.