CN112842503A - 一种滑动加压锁定接骨螺钉 - Google Patents

一种滑动加压锁定接骨螺钉 Download PDF

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CN112842503A
CN112842503A CN202110243361.9A CN202110243361A CN112842503A CN 112842503 A CN112842503 A CN 112842503A CN 202110243361 A CN202110243361 A CN 202110243361A CN 112842503 A CN112842503 A CN 112842503A
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screw
thread
sliding shaft
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余斌
孙福文
孙硕
孙德修
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Shandong Hangwei Orthopedics Medical Instrument Co Ltd
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    • A61B17/8052—Cortical plates, i.e. bone plates; Instruments for holding or positioning cortical plates, or for compressing bones attached to cortical plates immobilised relative to screws by interlocking form of the heads and plate holes, e.g. conical or threaded
    • A61B17/8057—Cortical plates, i.e. bone plates; Instruments for holding or positioning cortical plates, or for compressing bones attached to cortical plates immobilised relative to screws by interlocking form of the heads and plate holes, e.g. conical or threaded the interlocking form comprising a thread
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
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    • A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
    • A61B17/84—Fasteners therefor or fasteners being internal fixation devices
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    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
    • A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
    • A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
    • A61B17/84—Fasteners therefor or fasteners being internal fixation devices
    • A61B17/86—Pins or screws or threaded wires; nuts therefor
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Abstract

本发明一种滑动加压锁定接骨螺钉，包括接骨螺钉和限位套。接骨螺钉前端设有螺纹A，螺纹A后端设有光杆，光杆后端设有滑动轴，光杆与滑动轴之间设有台阶A，滑动轴外缘小于光杆，滑动轴后端设有螺钉头，螺钉头与滑动轴之间设有台阶B，螺钉头外缘大于滑动轴，螺钉头设有螺纹B，螺纹B的旋向与螺纹A相反。所述限位套设有螺纹孔，螺纹孔与螺纹B配合设置，螺纹孔后端设有台阶孔，螺钉头向后旋过所述螺纹孔置于台阶孔内，滑动轴设于螺纹孔内并与螺纹孔滑动配合，台阶A向后滑动至限位套停止，滑动的距离设为5～10mm，限位套后端设有锥螺纹，配合旋入接骨板的锥螺纹孔。

Description

一种滑动加压锁定接骨螺钉
技术领域
本发明提供了一种医疗器械，尤其是一种滑动加压锁定接骨螺钉。
背景技术
目前临床上常用鹅头钉或PFAN髓内钉治疗股骨颈骨折患者，这两种医疗器械均存在不同的缺陷。鹅头钉的缺陷在于其所用接骨螺钉的螺纹设置在骨折线两端，没有术后加压功能，因而不能有效促进骨折面愈合。PFAN髓内钉虽然具有术后加压功能，但需要术后人工手动加压。
发明内容
本发明提供了一种滑动加压锁定接骨螺钉，克服了上述缺陷。其主要包括接骨螺钉和限位套。
所述接骨螺钉前端设有螺纹A，用于旋入骨折线一端的股骨头，所述螺纹A后端设有光杆置于骨折线部位，所述光杆后端设有滑动轴，所述光杆与滑动轴之间设有台阶A，所述滑动轴外缘小于光杆，所述滑动轴后端设有螺钉头，所述螺钉头与滑动轴之间设有台阶B，所述螺钉头外缘大于滑动轴，所述螺钉头设有螺纹B，所述螺纹B的旋向与螺纹A相反，所述螺纹B设为矩形螺纹。所述限位套设有螺纹孔，所述螺纹孔与所述螺纹B配合设置，所述螺纹孔后端设有台阶孔，所述台阶孔后端设有工具孔，所述螺钉头向后旋过所述螺纹孔置于台阶孔内，所述滑动轴设于所述螺纹孔内并与螺纹孔滑动配合，所述台阶A向后滑动至所述限位套前端停止，所述滑动的距离设为5～10mm，所述限位套后端设有锥螺纹，配合旋入接骨板的锥螺纹孔或配合旋入CN201595922U万向锁定接骨板的开口螺帽的锥螺纹孔。手术时，按照所述螺纹A的旋向向前旋动所述接骨螺钉，所述螺钉头止于所述台阶孔底端，继续旋进所述接骨螺钉将对股骨颈两断端进行拉近并加压。
进一步，本发明一种滑动加压锁定接骨螺钉，主要包括接骨螺钉A和限位套A。
所述接骨螺钉A前端设有螺纹C，用于旋入骨折线一端的股骨头，所述螺纹C后段被削去牙顶形成外径小于所述螺纹C的螺杆，置于骨折线部位，所述螺杆后端设有滑动轴，所述螺杆与滑动轴之间设有台阶A，所述滑动轴外缘小于螺杆，所述滑动轴后端设有螺钉头A，所述螺钉头A与滑动轴之间设有台阶B，所述螺钉头A外缘大于滑动轴。所述限位套A设有螺纹孔A，所述螺纹孔A后端设有台阶孔，所述螺纹C向前配合旋过所述螺纹孔A，所述滑动轴滑动配合穿过所述螺纹孔A，所述螺钉头A向前运动时止于台阶孔底端，所述台阶孔后端设有工具孔，所述台阶A向后滑动至所述限位套A前端停止，所述滑动的距离设为5～10mm，所述限位套A后端设有锥螺纹，配合旋入接骨板的锁定螺纹孔或配合旋入CN201595922U万向锁定接骨板的开口螺帽的锥螺纹孔。手术时，按照所述螺纹C的旋向向前旋动所述接骨螺钉A，所述螺钉头A止于所述台阶孔底端，继续旋进将对股骨颈两断端进行拉近并加压。
手术时，一般取两枚或三枚也可多枚本发明一种滑动加压锁定接骨螺钉，配合接骨板对断裂的股骨颈进行接骨治疗。
有益效果：通过一种滑动加压锁定接骨螺钉，即保持锁定螺钉的作用，又增加了术中手动加压、术后滑动加压的功能，且符合骨折断端受到加压刺激后加速愈合的理论，实现了术中股骨头、股骨颈手动加压，术后股骨头、股骨颈自动加压的目的，既有利于牢固固定术又加速愈合，而且通过限制加压距离的设计，减少了骨折线部位骨细胞过量吸收而使间隙增大，进而引起的股延迟愈合、骨不连等缺陷，使患者避免二次手术之痛苦。
附图说明
图1是本发明一种滑动加压锁定接骨螺钉第一种实施方式的结构示意图。
图2是本发明一种滑动加压锁定接骨螺钉第二种实施方式的结构示意图。
具体实施方式
下面结合附图给出的实施例进一步说明本发明。
图1为本发明一种滑动加压锁定接骨螺钉第一种实施方式的结构示意图，其主要包括接骨螺钉1和限位套2。
所述接骨螺钉1前端设有螺纹A，用于旋入骨折线一端的股骨头，所述螺纹A后端设有光杆置于骨折线部位，所述光杆后端设有滑动轴11，所述光杆与滑动轴11之间设有台阶A，所述滑动轴11外缘小于光杆，所述滑动轴11后端设有螺钉头12，所述螺钉头12与滑动轴11之间设有台阶B，所述螺钉头11外缘大于滑动轴11，所述螺钉头11设有螺纹B，所述螺纹B的旋向与螺纹A相反，所述螺纹B设为矩形螺纹。所述限位套2设有螺纹孔21，所述螺纹孔21与所述螺纹B配合设置，所述螺纹孔21后端设有台阶孔，所述台阶孔后端设有工具孔，所述螺钉头12向后旋过所述螺纹孔21置于台阶孔内，所述滑动轴11设于所述螺纹孔21内并与螺纹孔21滑动配合，所述台阶A向后滑动至所述限位套2前端停止，所述滑动的距离设为5～10mm，所述限位套2后端设有锥螺纹，配合旋入CN201595922U万向锁定接骨板的开口螺帽3的锥螺纹孔。
图2是本发明一种滑动加压锁定接骨螺钉第二种实施方式的结构示意图，其主要包括接骨螺钉A4和限位套A5。
所述接骨螺钉A4前端设有螺纹C，用于旋入骨折线一端的股骨头，所述螺纹C后段被削去牙顶形成外径小于所述螺纹C的螺杆，置于骨折线部位，所述螺杆后端设有滑动轴41，所述螺杆与滑动轴41之间设有台阶A，所述滑动轴41外缘小于螺杆，所述滑动轴41后端设有螺钉头A42，所述螺钉头A42与滑动轴41之间设有台阶B，所述螺钉头A42外缘大于滑动轴41。所述限位套A5设有螺纹孔A51，所述螺纹孔A51后端设有台阶孔，所述螺纹C向前旋过所述螺纹孔A51，所述滑动轴41滑动配合穿过所述螺纹孔A51，所述螺钉头A42向前运动时止于台阶孔底端，所述台阶孔后端设有工具孔，所述台阶A向后滑动至所述限位套A5前端停止，所述滑动的距离设为5～10mm，所述限位套A5后端设有锥螺纹，配合旋入接骨板的锁定螺纹孔或配合旋入CN201595922U万向锁定接骨板的开口螺帽3的锥螺纹孔。手术时，按照所述螺纹C的旋向向前旋动所述接骨螺钉A，所述螺钉头A止于所述台阶孔底端，继续旋进将对股骨颈两断端进行拉近并加压。

Claims (8)

1.一种滑动加压锁定接骨螺钉，主要包括接骨螺钉(1)，其特征在于还设有限位套(2)。
2.根据权利要求1所述的一种滑动加压锁定接骨螺钉,其特征在于所述接骨螺钉(1)前端设有螺纹A，所述螺纹A后端设有光杆，所述光杆后端设有滑动轴(11)，所述滑动轴(11)后端设有螺钉头(12)，所述螺钉头(12)设有螺纹B。
3.根据权利要求2所述的一种滑动加压锁定接骨螺钉,其特征在于所述螺纹B的旋向与螺纹A相反。
4.根据权利要求2所述的一种滑动加压锁定接骨螺钉,其特征在于所述螺纹B设为矩形螺纹。
5.根据权利要求2所述的一种滑动加压锁定接骨螺钉,其特征在于所述光杆与滑动轴(11)之间设有台阶A，所述滑动轴(11)外缘小于光杆，所述螺钉头(12)与滑动轴(11)之间设有台阶B，所述螺钉头(12)外缘大于滑动轴(11)。
6.根据权利要求2所述的一种滑动加压锁定接骨螺钉,其特征在于所述限位套(2)设有螺纹孔(21)，所述螺纹孔(21)与所述螺纹B配合设置，所述螺纹孔(21)后端设有台阶孔，所述限位套(2)后端设有锥螺纹。
7.根据权利要求6所述的一种滑动加压锁定接骨螺钉,其特征在于所述螺钉头(12)向后旋过所述螺纹孔(21)置于台阶孔内，所述滑动轴(11)设于所述螺纹孔(21)内，所述滑动轴(11)与螺纹孔(21)滑动配合，所述台阶A向后滑动至所述限位套(2)停止，所述滑动的距离设为5～10mm。
8.一种滑动加压锁定接骨螺钉,其特征在于包括接骨螺钉A(4)和限位套A(5)，所述接骨螺钉A(4)前端设有螺纹C，所述螺纹C后段被削去牙顶形成外径小于所述螺纹C的螺杆，置于骨折线部位，所述螺杆后端设有滑动轴(41)，所述螺杆与滑动轴(41)之间设有台阶A，所述滑动轴(41)外缘小于螺杆，所述滑动轴(41)后端设有螺钉头A(42)，所述螺钉头A(42)与滑动轴(41)之间设有台阶B，所述螺钉头A(42)外缘大于滑动轴(41)，所述限位套A(5)设有螺纹孔A(51)，所述螺纹孔A(51)后端设有台阶孔，所述螺纹C向前旋过所述螺纹孔A(51)，所述滑动轴(41)滑动配合穿过所述螺纹孔A(51)，所述螺钉头A(42)向前运动时止于台阶孔底端，所述台阶A向后滑动至所述限位套A(5)停止，所述滑动的距离设为5～10mm，所述限位套A(5)后端设有锥螺纹。
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