| 摘要 |
<p>Disclosed is an expandable jacking curette for a bone fusion surgery. A cutter is inserted into the surgical region through an elongated guide tube, so that the damage of the tissue is minimized, enabling the percutaneous spinal surgery and the endoscope guide spinal surgery. The cutter has a structure matching with the bone structure or intervertebral structure, so that the cutter curettes the distal ends of the vertebral disc and the bone. The narrow intervertebral space or the bone structure is stably expanded, thereby allowing bone implantation materials, rein¬ forcement agents and fusion cage to be safely complemented. The expandable jacking curette has a lower structure including a crank shaft, at least one first crank arm connected to a crank shaft head by means of a hinge, a cutter connected to the first crank arm by means of a hinge, a support tube allowing the crank shaft to pass therethrough, and at least one second crank arm connected to the cutter by means of a hinge, wherein the second crank arm is connected to a sleeve of the support tube by means of a hinge, thereby forming at least one set of four- fold type crank; and an upper structure including an indicator having an indicator shaft coupled with the crank shaft through a bolt-nut mechanism, and a housing connected to a bracket that supports the indicator and fixes the support tube. The crank shaft moves up and down by rotating the indicator, thereby adjusting the height of the cutter.</p> |
