| 摘要 |
#CMT# #/CMT# The assembly has an extra-discal elastic unit (40) e.g. spring, arranged behind an intervertebral space (30) and limiting displacement between two adjacent vertebrae (10, 20) in a direction of intervertebral flexion. An intra-discal elastic unit (42) e.g. spring, ensures intervertebral spacing and compressed during lordosis of the vertebrae to control the lordosis. The elastic units mutually interact until an equilibrium point is found, where the equilibrium point is displaced in a dynamic manner and controlled by external forces e.g. weight of a patient and contraction of muscles. #CMT#USE : #/CMT# Intervertebral dynamic stabilization assembly for arthrodesis of two adjacent vertebrae of a patient. #CMT#ADVANTAGE : #/CMT# The configuration of the dynamic stabilization assembly permits to absorb shocks and vibrations during arthrodesis of adjacent vertebrae of the patient, and prevents the patient from being subjected to premature wear of a disc. The intra-discal elastic unit reduces posterior height and increases anterior height based on elastic properties, thus modifying position of the adjacent vertebrae in the direction of the lordosis. #CMT#DESCRIPTION OF DRAWINGS : #/CMT# The drawing shows a schematic side view of two adjacent vertebrae associated to an intervertebral dynamic stabilization assembly. 10, 20 : Vertebrae 14, 24 : Pedicle screws 30 : Intervertebral space 40 : Extra-discal elastic unit 42 : Intra-discal elastic unit. |
