The utility model relates to an adjustable pedicle screw, which comprises an insertion sleeve, the front end of the insertion sleeve is provided with a nail cap, and the insertion sleeve is respectively provided with mutually parallel screw in channels and adjustment lifting channels, the front end of the nail cap is connected with a lifting block through the lifting adjustment component, the nail cap is provided with an adjustment through hole, the lifting adjustment component is penetrated into the adjustment through hole, and the front end of the lifting block is provided with a nail front A gap of 1 to 3mm is arranged between the nail cap and the lifting block. Therefore, by using a pair of adjustable pedicle screws, the oblique plane of the left and right vertebral plates can be matched, which can meet the needs of minimally invasive spine surgery. The entry point and depth of pedicle screw, the entry point and angle of the through connecting rod at the root of spinous process can be precisely adjusted, which is convenient for doctors to control. The overall structure is simple and the use effect is good.
【技术实现步骤摘要】
可调式椎弓根钉
本技术涉及一种微创手术辅助器械,尤其涉及一种可调式椎弓根钉。
技术介绍
椎弓根是连接脊椎前、后部分的坚固结构,经椎弓根螺钉固定具有三维稳定性,优于其他固定方法。对比了椎弓根螺钉和普通螺钉的拔出力,前者明显大于后者,同时椎弓根螺钉固定的抗扭转破坏力矩最大,稳定性最强。因此,椎弓根螺钉固定技术在临床上有广阔的应用前景。但是,现有的手术装置在使用期间还面临以下难题:1.控制精度差,棘突—韧带复合体后移不便精确控制,目前棘突—韧带复合体后移靠术中人力提拉或带槽的加压滑动钢板带动棘突韧带复合体后移。2.操作困难,由于钢板具有一定长度且在手术同侧安装操作,这样会导致切口较大,加上棘突“上大下小”且其根部有一定弧度,导致钢板棘突侧螺钉固定困难,操作费时费力。再者加压滑动钢板的滑动槽不能与水平面垂直,导致棘突—韧带复合体后移存在一定困难。为此,现有的成形装置使用起来存在较多的缺陷。有鉴于上述的缺陷,本设计人,积极加以研究创新,以期创设一种可调式椎弓根钉,使其更具有产业上的利用价值。r>
技术实现思路
本文档来自技高网...
【技术保护点】
1.可调式椎弓根钉,包括有置入套,所述置入套的前端设置有钉帽,其特征在于:所述置入套内分别开设有相互平行的拧入通道与调节升降通道,所述钉帽的前端通过升降调节组件连接有升降块,所述钉帽设置有调节通孔,所述升降调节组件穿入调节通孔,所述升降块的前端设置有钉前端,所述钉帽与升降块之间设置有1至3mm的间隙。/n
【技术特征摘要】
1.可调式椎弓根钉,包括有置入套,所述置入套的前端设置有钉帽,其特征在于:所述置入套内分别开设有相互平行的拧入通道与调节升降通道,所述钉帽的前端通过升降调节组件连接有升降块,所述钉帽设置有调节通孔,所述升降调节组件穿入调节通孔,所述升降块的前端设置有钉前端,所述钉帽与升降块之间设置有1至3mm的间隙。
2.根据权利要求1所述的可调式椎弓根钉,其特征在于:所述升降调节组件为升降螺钉,所述升降螺钉包括有螺钉本体,所述螺钉本体的头部设置有衔接螺纹,所述螺钉尾部设置有调节后盖。
3.根据权利要求2所述的可调式椎弓根钉,其特征在于:所述调...
【专利技术属性】
技术研发人员:张春霖,
申请(专利权)人:苏州点合医疗科技有限公司,
类型:新型
国别省市:江苏;32
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