CN102256557B - 骨钉 - Google Patents
骨钉 Download PDFInfo
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Abstract
本发明涉及一种骨钉,其具有螺杆(15),所述螺杆具有尖端(13)并且同心于螺钉纵轴线(27),并且所述螺杆锚固到骨或骨部分中。在所述螺杆(15)上固定有螺钉头(14)。所述螺杆(15)基本上由X射线可穿透的塑料制成。所述螺杆(15)的部分(5、7、9、24)由与芯体(3、30)的材料不同的材料制成,所述芯体基本上形成所述螺杆(15)。所述至少一个承载区域(5、7、9、24)优选由金属或塑料,例如聚醚醚酮(PEEK)制成。
Description
技术领域
本发明涉及一种骨钉,其具有:螺杆,所述螺杆具有尖端并且同心于螺钉纵轴线,并且所述螺杆锚固到骨或骨部分中;固定在所述螺杆上且具有接合机构的螺钉头。
背景技术
长期以来已知这种类型的骨钉。所述骨钉例如用于骨缝术的骨固定。在这种情况下,这样的螺钉特别是用于将板或连接杆锚固在脊柱上。在这种情况下,所述螺钉主要承受应力,例如通过在所述螺钉和连接杆之间的夹紧连接或者与板的夹紧连接。例如从US 5,466,237中已知这种类型的骨钉。所述骨钉用于将连接杆固定在脊柱上。在这种情况下,所述连接杆夹紧在螺钉头和螺母之间。
EP 0 507 162 A公开了一种骨钉,所述骨钉用于将骨板固定在脊柱上。所述骨钉借助于套筒保持在骨板中。
EP 1 191 891 A公开了一种骨钉,所述骨钉具有轴向两段式螺钉头。因此使螺丝刀更容易插入螺钉头中。
已提及的骨钉由金属,特别是钛制成。所述金属具有高的强度,以至于所述金属在拧入时和在与植入物连接的情况下可承受高负荷。但是,在这里不利的是缺少X射线穿透性。
发明内容
本发明的目的在于,提供一种所述类型的骨钉,所述骨钉更多地或至少局部地是X射线可穿透的,但是所述骨钉仍然是性能可靠的。
在此种类型的骨钉中所述目的如下得以实现,即通过所述螺杆基本上由X射线可穿透的塑料制成,并且至少一个承载区域具有一部分,其中,所述部分由与芯体的基本上形成所述螺杆的材料不同的材料制成。根据本发明的骨钉的X射线穿透性通过由X射线可穿透的塑料,例如聚醚醚酮(PEEK)或纤维增强的PEEK制造螺杆来获得。纤维增强的PEEK和PEEK是X射线可穿透的,并且具有相对高的强度。但是,纤维增强的PEEK同时是相对脆的。尽管这个脆性,但是由纤维增强的PEEK制成的螺杆是可能的,因为至少一个承载区域具有由另一种材料制成的部分。所述材料是金属或PEEK。所述部分优选设置在螺钉头上,并且具有已提及的接合机构。如果所述部分由金属制成,那么所述骨钉仅在所述螺钉头的区域中不是X射线可穿透的。如在通常的由钛制成的螺钉中,这样的螺钉可以在螺钉头上例如借助于螺丝刀拧入,并且夹紧。承载区域为特别是承受应力的区域,如尤其是螺钉头和/或所述螺钉尖端。
根据本发明的改进形式提出,所述部分设置在所述螺杆的尖端上。这个部分特别是设有螺纹,并且可实现高的钻孔特性或螺纹切削特性。此外,所述钻头尖端可构成为是自攻的。尽管如此,根据本发明的骨钉在所述螺杆的区域中是在一定程度上X射线可穿透的。
根据本发明的改进形式,所述部分构成套筒形。这样的套筒形部分例如可通过压配合或通过粘接与所述螺杆连接。根据本发明的改进形式,设有所述套筒,以改善剪切强度。所述套筒优选设置在螺杆的位于所述螺钉头和所述尖端之间的中央区域中。
所述部分优选设置在所述螺钉头上。但是也可设想一种实施形式,在所述实施形式中,在螺钉头上设置有第一部分,并且在螺杆的尖端上设置有第二部分。一方面,因此获得非常好的钻孔特性和螺纹切削特性,并且另一方面,获得骨钉在所述螺钉头上的高的承载能力。在这种情况下,所述螺杆也是在一定程度上X射线可穿透的。
附图说明
下面借助于附图详细解释本发明的实施例。
附图示出:
图1-5分别示意地示出穿过根据本发明的螺钉的纵剖视图。
具体实施方式
图1示出螺钉1,所述螺钉1具有形成所述螺杆的芯体3。所述螺杆基本上在它的总长上具有作为外螺纹的螺纹4。所述杆部15同轴于螺钉纵轴线27。所述芯体3由X射线可穿透的塑料,例如纤维增强的PEEK和特别是碳纤维增强的PEEK或PEEK组成。所述纤维可以是长的纤维或者也可以是短的纤维。如可见的,所述杆部15同心于螺钉纵轴线27。但是,也可设想为其它X射线可穿透的且生物相容的塑料,如聚碳酸酯、聚乙烯、聚醚酮(PEK)或聚醚醚酮醚酮(PEEKEK)。
相对于所述尖端13在所述杆部15上固定有头部14,所述头部具有套筒形的部分5。所述部分5例如借助于压配合或通过粘接与所述芯体3固定地连接。所述部分5由例如钛或钢的金属制成。如果所述芯体3由碳纤维增强的PEEK组成,那么所述部分5可以由PEEK组成。在这种情况下,仅在所述芯体3中设有增强的纤维。例如在夹紧在板或连接杆上的情况下,所述部分5是所述承载区域。为了将所述螺钉1拧入骨或骨部分中,所述头部14具有例如为多边的凹部的形式的内接合部6。但是,所述接合原则上也可以在部分5的外部进行。
所述图2示出螺钉2,所述螺钉构成为自攻的螺钉。所述螺钉同样具有由纤维增强的PEEK或PEEK制成的芯体3’。所述芯体3’具有螺纹4’,所述螺纹同样是外螺纹,并且所述螺纹用于将所述螺钉2锚固在骨中或骨部分中。在这里,所述杆部15’的尖端通过尖端7形成,所述尖端由与所述芯体3’不同的金属制成。所述尖端7可具有螺纹28,所述螺纹可以是外螺纹和自攻的。所述螺纹28在所述尖端的区域中增补螺纹4’。所述尖端7优选由相对硬的材料,例如钛或钢制成。所述尖端7与所述芯体4’的固定例如同样通过压配合、粘接或例如拧紧来实现。但是,其它连接类型也是可能的。
在这里,所述螺钉头14’通过套筒5’形成,所述套筒同样由与所述芯体3’不同的金属制成。所述套筒15’与所述芯体3’固定地连接。所述套筒例如由金属,特别是钛组成或在由纤维增强的PEEK制成芯体3’的情况下由PEEK组成。所述套筒5’设有内接合部6’。所述螺钉头14’具有锥形的螺纹31,所述螺纹适用于固定在这里未示出的板的对应的孔中。
图3示出螺钉10,所述螺钉适合作为经椎板钉。所述螺钉具有由纤维增强的PEEK或PEEK制成的芯体3’。大致在尖端13”和头部14”的中央加工环绕的凹槽16或槽,套筒9插入所述凹槽或槽中。所述套筒至少是轴向固定的,并且由与所述芯体3”不同的材料组成。所述套筒9用于提高在所述芯体3”的中央区域中的剪切强度。但是,所述套筒9也可以设置在所述芯体3”的另一位置上,例如在所述尖端3”的附近或在所述头部14”的附近。所述套筒9优选由适宜的金属组成,例如由钢或钛组成。所述套筒9相对于圆周面17是齐平的。所述头部14”具有套筒5”,所述套筒具有外螺纹14”。可看出,所述套筒5”优选构成圆柱形,并且与所述芯体3”固定地连接,例如与所述芯体3”粘接。所述头部14”同样具有内接合部6”。
图4示出螺钉11,所述螺钉具有芯体3”’,所述芯体同样由PEEK或纤维增强的PEEK制成。所述芯体3”’在前端上具有凹槽19,尖端7”’插入所述凹槽中,所述尖端由明显比所述芯体3”’的材料更硬的材料制成。
所述芯体3”’具有另一凹槽18,套筒5”’插入所述凹槽中,并且与所述芯体3”’固定地连接。所述套筒5”’形成头部14”’,所述头部具有球形的外侧29和内接合部6”’。所述螺钉11优选构成为自攻的螺钉。所述螺钉在所述尖端7”’和所述头部14”’之间是X射线可穿透的。所述头部14”’例如适用于在特定系统中的多轴支承。所述头部14”’例如可以安装且固定夹紧在板中的相应的凹槽中。所述套筒5”’例如由钛或适宜的钢组成。
所述图5公开了一种股骨颈螺钉12,如在纵向方向上观察,所述股骨颈螺钉成阶梯形,并且在前端上具有带有圆柱形螺纹26的更大的外直径。所述螺钉具有芯体30,所述芯体30具有沿轴向方向延伸的通道22。所述通道22在所述芯体的两端上是开口的。所述芯体30在前面的变尖的端部上具有环绕的凹槽20,套筒形的尖端7”插入所述凹槽中。所述尖端7”与所述芯体30固定地连接,例如粘接。但是,也可设想例如为压配合或螺钉连接或类似的连接方式的连接21。相对于所述尖端7”设置有套筒24,所述套筒同样与所述芯体30固定地连接。所述套筒24具有凹部25,所述凹部例如构成为槽,所述槽沿轴向方向延伸,并且所述螺钉12可防旋转地固定在所述槽上。所述尖端7”和所述套筒24同样由与所述芯体30不同的金属制成。设有上面已经提及的材料。所述尖端7”和所述套筒24特别是由一种比所述芯体30的材料明显更硬的材料组成。在图1到5中示出的头部14至14”’原则上可分别与所示出的杆部和尖端的每一个连接。此外,在图1到图4中示出的螺钉中也可设想在图5中示出的通道22。当然,所述螺钉也可以具有本身适合的例如由钽纤维、硫酸钡组成的标记。此外,可设想例如由钛或羟基磷灰石组成的涂层。
附图标记列表
1 螺钉
2 螺钉
3 芯体
4 螺纹
5 套筒
6 内接合部
7 尖端
8 连接(螺纹)
9 套筒
10 螺钉
11 螺钉
12 螺钉
13 尖端
14 头部
15 杆部
16 凹槽
17 圆周
18 凹槽
19 凹槽
20 凹槽
21 连接
22 通道
23 内接合部(螺纹)
24 套筒
25 凹部
26 螺纹
27 螺钉纵轴线
28 螺纹
29 外侧
30 芯体
31 螺纹
Claims (5)
1.一种骨钉,具有:螺杆(15),所述螺杆具有尖端(13)并且同心于螺钉纵轴线(27),并且所述螺杆锚固到骨或骨部分中;固定在所述螺杆(15)上的且具有接合机构(6)的螺钉头(14),其中,所述螺杆(15)基本上由X射线可穿透的且具有相对高的强度的塑料制成,并且至少一个承载区域具有一部分(5、7、9、24),所述部分(5、7、9、24)由与芯体(3、30)的基本上形成所述螺杆(15)的材料不同的且明显更硬的材料制成,其特征在于,所述部分(5、24)形成螺钉头(14),并且第二部分(7、9)与所述部分(5、24)具有一定距离地与所述螺杆(15)连接,并且所述第二部分(7、9)同样由明显更硬的材料制成且形成第二承载区域,并且所述第二部分至少局部地形成所述螺杆的尖端(7)或者设置在所述螺钉头(14)和所述尖端(7)之间并设计为提高在该区域中的剪切强度。
2.如权利要求1所述的骨钉,其特征在于,所述至少一个承载区域(5、7、9、24)由金属或例如PEEK的塑料制成。
3.如权利要求1或2所述的骨钉,其特征在于,所述部分(5、7、9、24)分别构成套筒形。
4.如权利要求1或2所述的骨钉,其特征在于,所述部分(5、7、9、24)分别由钛或钢制成。
5.如权利要求1或2所述的骨钉,其特征在于,所述骨钉设计为独立的螺钉、椎弓根螺钉、股骨颈螺钉,经椎板钉或用于固定板的螺钉。
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP08405311.5 | 2008-12-19 | ||
EP084053115 | 2008-12-19 | ||
EP08405311A EP2198796A1 (de) | 2008-12-19 | 2008-12-19 | Knochenschraube |
PCT/EP2009/008743 WO2010069496A1 (de) | 2008-12-19 | 2009-12-08 | Knochenschraube |
Publications (2)
Publication Number | Publication Date |
---|---|
CN102256557A CN102256557A (zh) | 2011-11-23 |
CN102256557B true CN102256557B (zh) | 2013-10-23 |
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ID=40673570
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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CN2009801515040A Expired - Fee Related CN102256557B (zh) | 2008-12-19 | 2009-12-08 | 骨钉 |
Country Status (8)
Country | Link |
---|---|
US (1) | US20110257689A1 (zh) |
EP (2) | EP2198796A1 (zh) |
JP (1) | JP2012511980A (zh) |
CN (1) | CN102256557B (zh) |
BR (1) | BRPI0917751A2 (zh) |
CA (1) | CA2744392A1 (zh) |
RU (2) | RU2521537C2 (zh) |
WO (1) | WO2010069496A1 (zh) |
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US9980753B2 (en) | 2009-06-15 | 2018-05-29 | Roger P Jackson | pivotal anchor with snap-in-place insert having rotation blocking extensions |
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JP6411446B2 (ja) | 2013-03-15 | 2018-10-24 | インノビシオン, インコーポレーティッド | 骨ねじ及びその使用方法 |
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US9566092B2 (en) | 2013-10-29 | 2017-02-14 | Roger P. Jackson | Cervical bone anchor with collet retainer and outer locking sleeve |
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US9451993B2 (en) | 2014-01-09 | 2016-09-27 | Roger P. Jackson | Bi-radial pop-on cervical bone anchor |
US20150209094A1 (en) * | 2014-01-27 | 2015-07-30 | Biomet Trauma, LLC | Porous bone screw |
CN104905863A (zh) * | 2014-03-10 | 2015-09-16 | 创辉医疗器械江苏有限公司 | 复合螺钉 |
US9597119B2 (en) | 2014-06-04 | 2017-03-21 | Roger P. Jackson | Polyaxial bone anchor with polymer sleeve |
US10064658B2 (en) | 2014-06-04 | 2018-09-04 | Roger P. Jackson | Polyaxial bone anchor with insert guides |
US10154863B2 (en) * | 2015-07-13 | 2018-12-18 | IntraFuse, LLC | Flexible bone screw |
US10492838B2 (en) * | 2015-07-13 | 2019-12-03 | IntraFuse, LLC | Flexible bone implant |
US10448983B2 (en) | 2015-12-07 | 2019-10-22 | Carbofix In Orthopedics Llc | Core and shell coupling of a composite material bone implant |
DE102016011947A1 (de) * | 2016-10-05 | 2018-04-05 | Bluewater Medical GmbH | Schraube mit einem Kopfteil, einem Gewindeteil und einem Verbindungsteil |
CN106618705B (zh) * | 2017-01-23 | 2018-09-21 | 南京鼓楼医院 | 一种活动连接椎弓根螺钉 |
US11534219B2 (en) | 2017-11-21 | 2022-12-27 | Esp Medical Solutions, Llc | Hybrid radiolucent screw with radiopaque components and radiolucent components and method of manufacture |
WO2019136122A1 (en) | 2018-01-03 | 2019-07-11 | Lee Thomas Hoon | Hybrid cannulated orthopedic screws |
WO2020100167A1 (en) * | 2018-11-16 | 2020-05-22 | Indian Institute Of Technology Delhi | Orthopedic screw |
US11278334B2 (en) | 2019-05-22 | 2022-03-22 | DePuy Synthes Products, Inc. | Variable angle bone screw having a hardened head |
DE102019218335A1 (de) * | 2019-11-27 | 2021-07-01 | Robert Bosch Gmbh | Verfahren zum Einbringen eines Nagels in wenigstens ein Bauteil |
US11957391B2 (en) * | 2021-11-01 | 2024-04-16 | Warsaw Orthopedic, Inc. | Bone screw having an overmold of a shank |
CN116533550B (zh) * | 2023-03-16 | 2023-10-24 | 常州集硕医疗器械有限公司 | 基于碳纤维增强聚醚醚酮材料的椎体成形螺钉的加工工艺 |
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- 2009-12-08 EP EP09796300A patent/EP2367490A1/de not_active Withdrawn
- 2009-12-08 BR BRPI0917751A patent/BRPI0917751A2/pt not_active IP Right Cessation
- 2009-12-08 WO PCT/EP2009/008743 patent/WO2010069496A1/de active Application Filing
- 2009-12-08 CN CN2009801515040A patent/CN102256557B/zh not_active Expired - Fee Related
- 2009-12-08 JP JP2011541163A patent/JP2012511980A/ja active Pending
- 2009-12-08 RU RU2011128266/14A patent/RU2521537C2/ru not_active IP Right Cessation
- 2009-12-08 CA CA2744392A patent/CA2744392A1/en not_active Abandoned
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Also Published As
Publication number | Publication date |
---|---|
WO2010069496A8 (de) | 2011-06-30 |
BRPI0917751A2 (pt) | 2016-02-16 |
WO2010069496A1 (de) | 2010-06-24 |
CN102256557A (zh) | 2011-11-23 |
CA2744392A1 (en) | 2010-06-24 |
JP2012511980A (ja) | 2012-05-31 |
EP2198796A1 (de) | 2010-06-23 |
US20110257689A1 (en) | 2011-10-20 |
EP2367490A1 (de) | 2011-09-28 |
RU2014115686A (ru) | 2015-10-27 |
RU2011128266A (ru) | 2013-01-27 |
RU2521537C2 (ru) | 2014-06-27 |
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