CN1134660A - 接骨器 - Google Patents
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Abstract
螺塞(1)包括两个由断开线分隔的同轴部分(2,3),在每个部分中形成相互同轴的凹口(6,7)。第一部分(2)使具有螺纹(5)的第二部分(3)用螺钉拧在植入物中,当超过预定断开力矩两部分在断开线(4)处分开后,它仍然固定在植入物中。第二部分(3)中的凹口(7)在今后必要时可松开,以便拆除器具。由于可通过精确加工断开线(4)将断开力矩调整到特定值,所以可根据制造者的要求高精度地获得夹紧作用。
Description
本发明涉及适用于确保脊椎等接骨器两个植入物之间连接的锁紧螺塞。
在使用至今的脊椎接骨器中,尤其是在COTREL-DUBOUSSET式接骨器(美国专利4641636和4815453)中,构件由小螺钉加以装配。拧紧螺钉后,外科医生要折断它去掉其头部,这需要切断杆以便今后必要时摘除接骨器,因此相当困难。
另外,螺钉锁紧力矩的测定需要辅助仪器,而这种仪器的精度总是不能令人满意。
因此,本发明一方面旨在制造一种今后需要时较容易地拆除接骨器的装配件,另一方面旨在制造一种与螺塞连为一体的装置,确保预定精度的锁紧力矩。
根据本发明,螺塞由两个同轴部分构成,被断开线分开,在每个部分中具有一个凹口,与另一个凹口同轴,第一部分用于将第二螺纹部分用螺钉拧在植入物上,直至达到两个部分之间预定的断开力矩,如果需要的话,在第二部分所形成的凹口使第二部分松开。
螺纹部分则拧进相应植入物的螺纹孔中,或者拧在竖直锚固件(螺钉或夹具)的螺纹上,以确保所述锚固件与杆相连,或者连接在两个接骨纵向杆之间横向连接装置的螺纹杆上。
显然,使用本发明螺塞的所述三个实施例都是非限制性的,本发明在接骨器领域具有非常一般的意义。
当超过所确定的力矩时,在两部分断开之后,如果必要的话,第二部分可通过所述凹口松开,这样即可拆除装置。
断开力矩的数值随断开起始线路的深度变化,可以很容易地调整到理想的数值。对于锁紧力矩而言,可获得比至今使用通常螺钉所用锁紧力矩大的精度,因为可以比使用通常的方法包括使用精度较低的扭力计更精确地确定断开力矩。
本发明的其它特性和优越性在下面借助示出若干非限制性实施例的附图所作的描述中将更为清楚。附图如下:
图1是本发明螺塞第一实施例的放大正视图;
图2是图1中螺塞的俯视图;
图3是图1中细部A的局部放大正视图;
图4是本发明螺塞第二实施例的放大正视图;
图5是图4中螺塞的俯视图;
图6是图4中螺塞的仰视图;
图7是本发明螺塞第三实施例的放大正视图;
图8是图7中螺塞的俯视图;
图9是本发明螺塞第四实施例的放大正视图;
图10是图9中螺塞的俯视图;
图11是示出使用本发明螺塞的一个实施例的一种器具的局部立体图;
图12是本发明螺塞第五实施例以及所使用的相应器具的局部剖面放大正视图;
图13是使用本发明螺塞的第三实施例的局部剖面放大正视图;
图14是图13中螺塞的另一种实施例;
图15示出图12的另一种实施例。
图1至3示出锁紧螺塞1,用于确保构成脊椎接骨器的两个植入物之间的连接,所述接骨器未示出,例如上述专利文献中所述及的那种接骨器。
螺塞1由两个被断开线4分开的同轴部分2,3构成。无螺纹的部分2构成螺塞的锁紧头部,而部分3具有外螺纹5,用于刚好埋置于装配到螺纹部分3应该锁紧在其上的另一个构件上的构件中。
第一部分2具有轴线为XX的六角形外凹口6,所述轴线XX是螺塞1的总轴线。第二凹口7不同于凹口6,在所示实施例中为六叶形,与六角形凹口6同轴,从断开线4起形成于第二部分3中。
凹口6连接到平滑的圆柱形部分8上,所述圆柱形部分8与第二部分相连,断开线4位于圆柱形部分8的端部。在断开线4的平面P和第二部分3的凹口7的始点之间保留一个预定的距离e,所述第二部分3加工成一定尺寸,以便在拧紧螺钉后能埋置于植入物中。另外,第二部分3的螺纹5终止于断开线4之前,相隔一段距离d(见图3)。断开线4由一个凹槽构成,该凹槽具有与断开力矩的预定值相一致的深度。所述凹槽最好配置成和第二部分3的松开凹口7一样,以便所述凹口7抵不住大于断开力矩的锁紧力矩,以便在螺塞断开后阻止所述部分3再锁紧。
采用刚刚述及的螺塞1直接起因于上面的说明。使用未示出的与六角形凹口6相配合的工具,用螺钉将部分3安装在植入物中,两个部分2和3之间的断开发生在断开线4处,由此达到所定的最大锁紧力矩。
断开线4的平面P和锁紧部分3的凹口7的始点之间的距离e,具有避免凹口7因断开而受损的优越性,如果在平面P和凹口7的始点之间不留间隔,就会发生受损的情况。这样,可以使螺塞头部完全断开,得到具有恒定力矩、无损于植入物的平滑表面。
此外,松开螺钉的螺纹5终止于断开线4之前,这就避免了断开时在螺纹5的开头部分产生毛刺。实际上,重要的是避免这种引起患者痛苦以及可划破外科医生手套的毛刺,获得合适的平滑端面。
内凹口7的六叶形形状,由于其避免变形的强度大,所以比其它类型的凹口具有特殊优越性。一般来说,例如6和7这样的回转凹口比简单的螺丝刀用的切口更好,因为所述这种回转凹口对工具施加的力的抗力比较大。
断开力矩的精度可约为加工公差的±3%。该力矩的数值和精度通过或多或少加深断开凹槽即可获得。
使用扭力计,这种精度比迄今使用通常螺钉所获得的精度大得多。
在图4至6所示的第二实施例中,螺塞14由两个部分15和16构成。区别在于,锁紧部分15的凹口17是内部的六叶形,像螺纹松开部分16的凹口7一样,头部15的外表面15a是平滑的。该头部15通过平滑的圆柱形部分15b与螺纹部分16相连接。
在图7和8所示的第三实施例中,由被断开线4分隔的两个部分19、21所构成的螺塞18,具有两个同轴内凹口20和23,分别位于锁紧部分19和松开部分21中。部分19可具有滚螺纹19a,对螺塞18进行手动安装和锁紧。根据所定的断开力矩数值,可以或者通过滚螺纹部分19a(或其它)手工安装锁紧螺塞18,或者通过凹口20用机械锁紧来安装锁紧螺塞18。
图9和10所示的第四实施例与图7和8所示的实施例的主要区别在于,在螺塞25的松开部分24中具有六角形凹口26,与锁紧部分27的六叶形凹口22同轴。
图11示出使用本发明螺塞1的一个实施例。由图11可见,接骨用杆9与侧臂11相连,在所述侧臂11的端部由杆9固定一个横向套筒12。杆9可具有任何表面:平滑表面,小球形表面,粗糙表面,螺纹表面等。在套筒12中具有螺纹孔,可以安装例如25这样的螺塞,以便装配杆9和臂11。该螺塞25(或所述其它螺塞中的一种)最好取代上述法国专利9213476中述及的传统螺钉。在其部分27分开后,其剩余部分24不超出植入物。因此,本发明螺塞有利于保证器具的体积较小,因为与它安装在里面的构件比较起来,它并不明显。
图12示出使用本发明的另一个实施例,其中,所述第二部分拧在其上的植入物是一个螺纹杆30,它是接骨用两个纵向杆(此仅示出其中之一31)之间的横向连接装置。
该装置包括连接器32和横向连接板33,所述连接器32由连杆31横穿,并与螺纹杆30相连接,所述连接板33位于杆31之间,也由螺纹杆30横穿。在所述螺纹杆30上可以拧上阳螺母34,形成所述第二松开部分,具有任何形状(六角形、正方形、三角形、切口形等)的外凹口35。螺母34与具有外的或内有传动凹口的锁紧螺母36相连接:在所示实施例中,由于六角形外凹口37,所述传动是外传动。两个螺母34、36由类似于前述的断开起始区域38加以连接。所述横向连接装置32、33、34在非限制性实施例中示出。
作为另一种可能的实施例(图15),板33可支承在骨螺钉46的凸肩45上,螺塞36、34连接这两个构件。
图13示出使用本发明的另一个实施例,其中,与图12中螺塞34、36相类似的螺塞36a、34a(标号37a、34a、38a、35a)具有易碎螺母34a,拧在骨螺钉42(或夹具)的U形体41的螺纹39上。区域38a锁紧和断开后,螺母34a确保螺钉42(或夹具)与安装在体41中的杆43相连接。
在图14的另一种实施例中,阳螺母36a由具有任何外形凹口45的螺母44取代。
显然,松开凹口35a可为任何形状。
在本发明各种实施例中,所确定的锁紧力矩根据制造者的愿望而定,并确保该力矩的重复率,不采用目前使用的测扭力的方法,这是因为要不断地对这些器具进行消毒。
一般来说,在构成螺塞的两个部分中可以采用任何类型的凹口,但最好采用六叶形凹口。也可以采用正方形、三角形、十字形等形状的锁紧和拆卸用的内外凹口以及任何类型的断开起始截面。
拆卸凹口7、23可以如同所示的那样是凹入的,或者连通到朝器具的杆旋转的所述第二部分的表面上。这种凹口示于图4,图4示出连通凹口28,此时取消了圆锥部分10。它可以形成任何类型的螺塞-杆接触面(例如图1中10这样的圆锥部分)、座圈等。
螺塞可具有任何直径,以任何预定力矩断开。
最好采用与各种松开螺纹部分相同的标准锁紧部分,这样就简化了螺塞的制造,降低了成本。可以使由断开起始线路分隔的两个相同的凹口重叠起来。第一部分2可具有任何形状,凹状或凸状,可以例如加工成螺纹。
最好使用一种在螺塞头部(第一部分)一断开时即可夹住它的器械,或者使用一种避免头部掉落在手术室的装置。
螺塞头部可具有特殊几何形状,确保锁紧就位、断开的头部的夹持、以及手工安装(图7)。可以将螺塞的第一部分用作器具的锚固点,在结束矫正或压紧时进行植入物之间的连接。最后,与附图所示的相反,尤其是与图4所示的两个凹口17和7通入中间腔室13的情况相反,可以堵住该腔室。在这种情况下,锁紧部分16的凹口7由连通部分28所取代。
Claims (13)
1、锁紧螺塞(1;14;18;25),用于确保接骨器的两个植入物之间的连接,其特征在于,它由两个被断开线(4)分隔的同轴部分(2,3…)构成,其特征还在于,每个部分都有一个与另一个凹口同轴的凹口(6,7;17,7;20,23;…),第一部分(2…)用于将第二螺纹部分(3;16…)用螺钉拧在植入物上,直至达到两个部分之间的预定断开力矩,如果需要的话,第二部分中形成的凹口使第二部分松开。
2、根据权利要求1所述的螺塞,其特征在于,所述第二螺纹部分(3;16…)用螺钉拧在若干植入物中一个植入物(12)的螺纹孔中。
3、根据权利要求2所述的螺塞,其特征在于,在断开线(4)的平面(P)和第二部分(3;16;21…)的凹口(7;23…)的开始点之间保留一个确定的距离(e)。
4、根据权利要求2所述的螺塞,其特征在于,第二部分(3;16;21;24)的螺纹(5)刚好终止于断开线(4)之前。
5、根据权利要求2所述的螺塞,其特征在于,所述第二螺纹部分(3;16;21;24)加工成一定尺寸,以便在锁紧螺钉后埋置于植入物中。
6、根据权利要求2所述的螺塞,其特征在于,断开线(4)由一个凹槽构成,该凹槽的深度与断开力矩的预定值相一致,提供断开力矩,如同第二部分(3;16…)的松开凹口(7;23)一样,以便所述凹口抵不住大于断开力矩的锁紧力矩。
7、根据权利要求2所述的螺塞,其特征在于,第一部分(15;19;27)的凹口(7;20;22)是内部的。
8、根据权利要求7所述的螺塞,其特征在于,所述凹口(7;20;22)是六叶形。
9、根据权利要求2所述的螺塞,其特征在于,第一部分(2)的凹口是外部的,例如呈多角形(6)。
10、根据权利要求2所述的螺塞,其特征在于,第二部分(3;16;21)的凹口是内部的,呈六叶形(7)。
11、根据权利要求10所述的螺塞(25),其特征在于,凹口(26)是六角形。
12、根据权利要求2所述的螺塞,其特征在于,所述第二部分的凹口(7;23;26)是凹入的,或者连通到朝器具的杆(9)旋转的所述第二螺纹部分(3;16…)的表面上。
13、根据权利要求1所述的螺塞,其特征在于,用螺钉将所述第二部分安装在其上的植入物是两个接骨纵向杆(31)之间横向连接装置的螺纹杆(30),所述第二部分是配有任何形状凹口(35)的阳螺母(34)
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR9410377A FR2723837B1 (fr) | 1994-08-29 | 1994-08-29 | Bouchon filete de serrage pour assurer une liaison entre deux implants d'une instrumentation d'osteosynthese rachidienne ou autres. |
FR94/10377 | 1994-08-29 | ||
PCT/FR1995/001115 WO1996006576A1 (fr) | 1994-08-29 | 1995-08-24 | Instrumentation d'osteosynthese |
Publications (1)
Publication Number | Publication Date |
---|---|
CN1134660A true CN1134660A (zh) | 1996-10-30 |
Family
ID=26231378
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN95190810A Withdrawn CN1134660A (zh) | 1994-08-29 | 1995-08-24 | 接骨器 |
Country Status (4)
Country | Link |
---|---|
CN (1) | CN1134660A (zh) |
CA (1) | CA2175069A1 (zh) |
FR (1) | FR2723837B1 (zh) |
ZA (1) | ZA957183B (zh) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN109899365A (zh) * | 2019-03-13 | 2019-06-18 | 博瑞康有限公司 | 螺栓 |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2785787B1 (fr) | 1998-11-12 | 2001-04-13 | Materiel Orthopedique En Abreg | Dispositif d'osteosynthese d'un segment rachidien par voie anterieure |
FR2790941B1 (fr) | 1999-03-16 | 2001-06-08 | Materiel Orthopedique En Abreg | Instrumentation d'osteosynthese rachidienne a plaque et vis pediculaire ou a connecteur transversal entre une tige vertebrale et une vis pediculaire |
US6302888B1 (en) | 1999-03-19 | 2001-10-16 | Interpore Cross International | Locking dovetail and self-limiting set screw assembly for a spinal stabilization member |
FR2799947B1 (fr) * | 1999-10-22 | 2002-01-11 | Transco Esquisse | Vis pediculaire auto-secable |
FR2810874B1 (fr) | 2000-06-30 | 2002-08-23 | Materiel Orthopedique En Abreg | Implant pour dispositif d'osteosynthese comprenant une partie destinee a l'ancrage osseux et un corps de fixation sur une tige |
SE523765C2 (sv) * | 2000-07-12 | 2004-05-18 | Entific Medical Systems Ab | Skruvformat förankringselement för permanent förankring av benförankrade hörapparater och öron- eller ögonproteser i skallbenet |
FR2825015B1 (fr) * | 2001-05-23 | 2003-10-24 | Jean Yves Coillard | Vis pour implant osseux |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE8418588U1 (de) * | 1984-06-15 | 1984-10-04 | Mecron Medizinische Produkte Gmbh, 1000 Berlin | Schraube |
JPH0712339B2 (ja) * | 1985-03-22 | 1995-02-15 | コドマン・アンド・シヤートレフ・インコーポレイテツド | 頭蓋ねじ |
DE3630863A1 (de) * | 1986-09-08 | 1988-03-17 | Mecron Med Prod Gmbh | Knochenschraube |
DE3701765C1 (de) * | 1987-01-22 | 1988-06-09 | Ethicon Gmbh | Knochenschraube |
US4790297A (en) * | 1987-07-24 | 1988-12-13 | Biotechnology, Inc. | Spinal fixation method and system |
FR2633177B1 (fr) * | 1988-06-24 | 1991-03-08 | Fabrication Materiel Orthopedi | Implant pour dispositif d'osteosynthese rachidienne, notamment en traumatologie |
GB9014817D0 (en) * | 1990-07-04 | 1990-08-22 | Mehdian Seyed M H | Improvements in or relating to apparatus for use in the treatment of spinal disorders |
CH681853A5 (zh) * | 1990-08-21 | 1993-06-15 | Synthes Ag | |
FR2697743B1 (fr) * | 1992-11-09 | 1995-01-27 | Fabrication Mat Orthopedique S | Dispositif d'ostéosynthèse rachidienne applicable notamment aux vertèbres dégénératives. |
FR2697744B1 (fr) * | 1992-11-10 | 1995-03-03 | Fabrication Mat Orthopedique S | Instrumentation d'ostéosynthèse rachidienne par voie antérieure. |
-
1994
- 1994-08-29 FR FR9410377A patent/FR2723837B1/fr not_active Expired - Fee Related
-
1995
- 1995-08-24 CA CA002175069A patent/CA2175069A1/fr not_active Abandoned
- 1995-08-24 CN CN95190810A patent/CN1134660A/zh not_active Withdrawn
- 1995-08-28 ZA ZA957183A patent/ZA957183B/xx unknown
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN109899365A (zh) * | 2019-03-13 | 2019-06-18 | 博瑞康有限公司 | 螺栓 |
Also Published As
Publication number | Publication date |
---|---|
ZA957183B (en) | 1997-04-01 |
CA2175069A1 (fr) | 1996-03-07 |
FR2723837A1 (fr) | 1996-03-01 |
FR2723837B1 (fr) | 1997-01-17 |
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