CN111529136A - 股骨头表面置换假体 - Google Patents
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- A61F2/02—Prostheses implantable into the body
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- A61F2002/30001—Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
- A61F2002/30316—The prosthesis having different structural features at different locations within the same prosthesis; Connections between prosthetic parts; Special structural features of bone or joint prostheses not otherwise provided for
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- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
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- A61F2/30—Joints
- A61F2/30767—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth
- A61F2/30771—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth applied in original prostheses, e.g. holes or grooves
- A61F2002/30772—Apertures or holes, e.g. of circular cross section
- A61F2002/30784—Plurality of holes
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- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
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- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/30—Joints
- A61F2/32—Joints for the hip
- A61F2/36—Femoral heads ; Femoral endoprostheses
- A61F2/3609—Femoral heads or necks; Connections of endoprosthetic heads or necks to endoprosthetic femoral shafts
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Abstract
本发明公开一种股骨头表面置换假体,包括相连的关节部和股骨颈插入体,关节部远离股骨颈插入体的一端为球面,关节部靠近股骨颈插入体的一端、股骨颈插入体上均设置有能够与人体骨嵌合的附着结构层,股骨颈插入体上还设置固定单元。本发明的股骨头表面置换假体,利用关节部的球面结构能够替代人体股骨头表面关节,股骨颈插入体能够插入股骨颈髓腔中,且在关节部的一侧和股骨颈插入体表面均设置了附着结构层,用于生物固定,有利于骨长入,实现假体与人体骨的最终嵌合;另外,在股骨颈插入体上设置了固定单元,能够防止假体旋转或退出,有效保证了假体的位置正确性和稳定性,延长了假体的使用寿命。
Description
技术领域
本发明涉及关节假体植入技术领域,特别是涉及一种股骨头表面置换假体。
背景技术
从关节假体植入应用的临床效果而言,保证人体骨组织的正常血运,实现骨组织在假体表面的骨长入,是假体能够长期稳定,获得长期使用寿命的关键因素。
公开号为CN110393611A的中国专利申请,公开了一种表面髋关节假体,其公开了包括股骨头假体,股骨头假体包括用于套接在人体的股骨头的外表面上的股骨头部和与股骨头部相连且用于植入人体的股骨头内的固定部,股骨头部的与人体的股骨头的外表面相配合的内表面上形成有第一防旋槽和/或固定部的外表面上形成有第二防旋槽,使得骨水泥在填充时能够进入第一防旋槽和第二防旋槽中。
由此可知,现有技术中的髋关节表面置换假体一般采用骨水泥固定,导致骨量损失大,无法实现骨长入,远期松动风险高,假体失效的可能性大。
因此,如何改变现有技术中,髋关节表面置换假体采用骨水泥固定,无法实现骨长入,以及后期假体失效风险高的现状,成为了本领域技术人员亟待解决的问题。
发明内容
本发明的目的是提供一种股骨头表面置换假体,以解决上述现有技术存在的问题,增强生物固定效果,延长假体使用寿命。
为实现上述目的,本发明提供了如下方案:本发明提供一种股骨头表面置换假体,包括相连的关节部和股骨颈插入体,所述关节部远离所述股骨颈插入体的一端为球面,所述关节部靠近所述股骨颈插入体的一端、所述股骨颈插入体上均设置有能够与人体骨嵌合的附着结构层,所述股骨颈插入体上还设置固定单元,所述固定单元包括若干固定块,沿所述股骨颈插入体至所述关节部的方向,所述固定块沿所述股骨颈插入体朝向远离所述股骨颈插入体的方向倾斜设置。
优选地,所述附着结构层为3D打印骨小梁。
优选地,所述附着结构层为喷涂制成的微孔结构层。
优选地,所述关节部为中空的半球状,所述股骨颈插入体为圆柱状,所述股骨颈插入体的一端与所述关节部的内壁相连,所述股骨颈插入体与所述关节部同轴设置。
优选地,所述固定块为阶梯状楔形结构,所述固定单元包括若干所述固定块,所述固定块于所述股骨颈插入体的外周面上呈圆周状均布。
优选地,所述固定单元的数量为多组,多组所述固定单元沿所述股骨颈插入体的高度方向等间距均布。
优选地,多组所述固定单元交错设置。
优选地,所述股骨颈插入体远离所述关节部的一端为球面。
本发明相对于现有技术取得了以下技术效果:本发明的股骨头表面置换假体,包括相连的关节部和股骨颈插入体,关节部远离股骨颈插入体的一端为球面,关节部靠近股骨颈插入体的一端、股骨颈插入体上均设置有能够与人体骨嵌合的附着结构层,股骨颈插入体上还设置固定单元,固定单元包括若干固定块,沿股骨颈插入体至关节部的方向,固定块沿股骨颈插入体朝向远离股骨颈插入体的方向倾斜设置。本发明的股骨头表面置换假体,设置关节部和股骨颈插入体,关节部的球面结构能够替代人体股骨头表面关节,股骨颈插入体能够插入股骨颈髓腔中,且在关节部的一侧和股骨颈插入体表面均设置了能够与人体骨嵌合的附着结构层,用于生物固定,省略现有技术中骨水泥,有利于骨长入,实现假体与人体骨的最终嵌合;另外,在股骨颈插入体上设置了固定单元,能够防止假体旋转或退出,有效保证了假体的位置正确性和稳定性,延长了假体的使用寿命。
附图说明
为了更清楚地说明本发明实施例或现有技术中的技术方案,下面将对实施例中所需要使用的附图作简单地介绍,显而易见地,下面描述中的附图仅仅是本发明的一些实施例,对于本领域普通技术人员来讲,在不付出创造性劳动性的前提下,还可以根据这些附图获得其他的附图。
图1为本发明的股骨头表面置换假体的结构示意图;
图2为本发明的股骨头表面置换假体的正式结构示意图;
图3为本发明的股骨头表面置换假体的剖切结构示意图;
其中,1为关节部,2为股骨颈插入体,3为固定块,4为附着结构层。
具体实施方式
下面将结合本发明实施例中的附图,对本发明实施例中的技术方案进行清楚、完整地描述,显然,所描述的实施例仅仅是本发明一部分实施例,而不是全部的实施例。基于本发明中的实施例,本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例,都属于本发明保护的范围。
本发明的目的是提供一种股骨头表面置换假体,以解决上述现有技术存在的问题,增强生物固定效果,延长假体使用寿命。
为使本发明的上述目的、特征和优点能够更加明显易懂,下面结合附图和具体实施方式对本发明作进一步详细的说明。
请参考图1-3,其中,图1为本发明的股骨头表面置换假体的结构示意图,图2为本发明的股骨头表面置换假体的正式结构示意图,图3为本发明的股骨头表面置换假体的剖切结构示意图。
本发明提供一种股骨头表面置换假体,包括相连的关节部1和股骨颈插入体2,关节部1远离股骨颈插入体2的一端为球面,关节部1靠近股骨颈插入体2的一端、股骨颈插入体2上均设置有能够与人体骨嵌合的附着结构层4,股骨颈插入体2上还设置固定单元,固定单元包括若干固定块3,沿股骨颈插入体2至关节部1的方向,固定块3沿股骨颈插入体2朝向远离股骨颈插入体2的方向倾斜设置。
本发明的股骨头表面置换假体,设置关节部1和股骨颈插入体2,关节部1的球面结构能够替代人体股骨头表面关节,股骨颈插入体2能够插入股骨颈髓腔中,且在关节部1的一侧和股骨颈插入体2表面均设置了能够与人体骨嵌合的附着结构层4,用于生物固定,省略现有技术中骨水泥,有利于骨长入,实现假体与人体骨的最终嵌合;另外,在股骨颈插入体2上设置了固定单元,能够防止假体旋转或退出,有效保证了假体的位置正确性和稳定性,延长了假体的使用寿命。
具体地,附着结构层4为3D打印骨小梁或喷涂制成的微孔结构层,3D打印骨小梁或微孔结构层均用于生物固定,有利于骨长入,能够令假体与人体骨实现嵌合,此处需要说明的是,3D打印骨小梁为采用3D打印技术制作的类似骨小梁的结构,因3D打印技术为本领域技术人员的惯用手段,此处不再赘述。
更具体地,关节部1为中空的半球状,保证关节部1的外球面能够替代人体股骨头表面关节,股骨颈插入体2为圆柱状,便于插入股骨颈髓腔中,股骨颈插入体2的一端与关节部1的内壁相连,股骨颈插入体2与关节部1同轴设置,使得假体受力均匀,延长假体使用寿命。
在本具体实施方式中,固定块3为阶梯状楔形结构,固定块3的体积较大一端朝向关节部1设置,在股骨颈插入体2插入股骨颈髓腔后,固定块3能够起到防止假体旋转和后退的作用,避免股骨颈插入体2由股骨颈髓腔中滑出,固定单元包括若干个固定块3,固定块3于股骨颈插入体2的外周面上呈圆周状均布,提高股骨颈插入体2的受力均匀性,在实际操作中,还可以根据具体需要改变固定块3的设置方式。
进一步地,为了增强固定块3对假体的固定作用,固定单元的数量为多组,多组固定单元沿股骨颈插入体2的高度方向等间距均布,有效避免股骨颈插入体2由股骨颈髓腔中滑脱,延长假体使用寿命。
另外,在设置多组固定单元时,可将多组固定单元交错设置,即相邻的固定单元的固定块3之间具有夹角,可有效避免股骨颈插入体2转动,保证假体的位置准确度,提高假体稳定性。
更进一步地,股骨颈插入体2远离关节部1的一端为球面,在股骨颈插入体2插入股骨颈髓腔中时,球面部分首先插入,能够减小股骨颈插入体2与股骨颈髓腔之间的滑动摩擦系数,使得股骨颈插入体2顺利进入股骨颈髓腔中。
本发明的股骨头表面置换假体,包括关节部1和股骨颈插入体2,关节部1的球面结构能够替代人体股骨头表面关节,股骨颈插入体2能够插入股骨颈髓腔中,且在关节部1的一侧和股骨颈插入体2表面均设置了附着结构层4,附着结构层4为3D打印骨小梁或喷涂制成的微孔结构层,能够用于生物固定,有利于骨长入,实现假体与人体骨的最终嵌合;另外,在股骨颈插入体2上设置了固定单元,固定单元包括呈阶梯状楔形的固定块3,固定块3能够防止假体旋转或退出,有效保证了假体的位置正确性和稳定性,延长了假体的使用寿命。
本发明中应用了具体个例对本发明的原理及实施方式进行了阐述,以上实施例的说明只是用于帮助理解本发明的方法及其核心思想;同时,对于本领域的一般技术人员,依据本发明的思想,在具体实施方式及应用范围上均会有改变之处。综上所述,本说明书内容不应理解为对本发明的限制。
Claims (8)
1.一种股骨头表面置换假体,其特征在于:包括相连的关节部和股骨颈插入体,所述关节部远离所述股骨颈插入体的一端为球面,所述关节部靠近所述股骨颈插入体的一端、所述股骨颈插入体上均设置有能够与人体骨嵌合的附着结构层,所述股骨颈插入体上还设置固定单元,所述固定单元包括若干固定块,沿所述股骨颈插入体至所述关节部的方向,所述固定块沿所述股骨颈插入体朝向远离所述股骨颈插入体的方向倾斜设置。
2.根据权利要求1所述的股骨头表面置换假体,其特征在于:所述附着结构层为3D打印骨小梁。
3.根据权利要求1所述的股骨头表面置换假体,其特征在于:所述附着结构层为喷涂制成的微孔结构层。
4.根据权利要求1所述的股骨头表面置换假体,其特征在于:所述关节部为中空的半球状,所述股骨颈插入体为圆柱状,所述股骨颈插入体的一端与所述关节部的内壁相连,所述股骨颈插入体与所述关节部同轴设置。
5.根据权利要求4所述的股骨头表面置换假体,其特征在于:所述固定块为阶梯状楔形结构,所述固定单元包括若干所述固定块,所述固定块于所述股骨颈插入体的外周面上呈圆周状均布。
6.根据权利要求5所述的股骨头表面置换假体,其特征在于:所述固定单元的数量为多组,多组所述固定单元沿所述股骨颈插入体的高度方向等间距均布。
7.根据权利要求6所述的股骨头表面置换假体,其特征在于:多组所述固定单元交错设置。
8.根据权利要求1-7任一项所述的股骨头表面置换假体,其特征在于:所述股骨颈插入体远离所述关节部的一端为球面。
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CN115869114A (zh) * | 2023-01-31 | 2023-03-31 | 北京爱康宜诚医疗器材有限公司 | 一种软骨假体 |
CN116269946A (zh) * | 2023-05-12 | 2023-06-23 | 北京爱康宜诚医疗器材有限公司 | 股骨头表面置换假体 |
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CN115869114A (zh) * | 2023-01-31 | 2023-03-31 | 北京爱康宜诚医疗器材有限公司 | 一种软骨假体 |
CN115869114B (zh) * | 2023-01-31 | 2023-06-06 | 北京爱康宜诚医疗器材有限公司 | 一种软骨假体 |
CN116269946A (zh) * | 2023-05-12 | 2023-06-23 | 北京爱康宜诚医疗器材有限公司 | 股骨头表面置换假体 |
CN116269946B (zh) * | 2023-05-12 | 2023-10-27 | 北京爱康宜诚医疗器材有限公司 | 股骨头表面置换假体 |
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