WO2017080131A1 - 一种能有效促进骨折愈合的髓内固定装置 - Google Patents
一种能有效促进骨折愈合的髓内固定装置 Download PDFInfo
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- WO2017080131A1 WO2017080131A1 PCT/CN2016/077139 CN2016077139W WO2017080131A1 WO 2017080131 A1 WO2017080131 A1 WO 2017080131A1 CN 2016077139 W CN2016077139 W CN 2016077139W WO 2017080131 A1 WO2017080131 A1 WO 2017080131A1
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- fixation device
- fracture healing
- intramedullary fixation
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- A—HUMAN NECESSITIES
- 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
- A61B17/72—Intramedullary pins, nails or other devices
Definitions
- the invention relates to an intramedullary fixation device for fixing and promoting healing of a fracture, and belongs to the technical field of orthopedic medical devices.
- a more general effect is the effect of the volumetric space-occupying effect of the internal fixation on the growth and continuity of the trabecular bone at the two fracture ends.
- the trabecular bone in the human skeleton has an important function, which connects the surrounding cortical bone and enhances the overall strength of the bone. In addition, it constitutes an important mechanical conduction and transformation function in the medullary cavity, which can make the force more stress when the cortical bone is subjected to various loads. Balanced and reasonable, and spread and distribute local excessive load to other parts. Taking the proximal femur as an example, there is a neck dry angle of about 110°-140° between the femoral neck and the femoral shaft.
- the femoral neck axis and the femoral condyle form a femoral neck anteversion angle, so the femoral neck is subjected to pressure, tension and Shear force.
- a truss structure consisting of a pressure trabecular bone and a tension trabecular system in the femoral neck, transforming the bending moment and torque it receives and transmitting it to the backbone, dispersing local stress and reducing the risk of fracture; if there is no such truss in the proximal femur Structure, when the femoral shaft under the action of violence, the femoral neck will bear a large bending moment and torque, and the risk of fracture is higher.
- trabecular bone can effectively restore the intramedullary blood supply system and contribute to the healing of cancellous and cortical bone. If the trabecular bone structure is unable to recover after the interruption, the intramedullary and extramedullary epiphysis growth is unbalanced during the fracture healing process, especially in the elderly. Osteoporotic fracture may occur after the cortical bone is healed, and the bone canal healing is poor, which affects the bone healing strength. And conduction to normal load, sometimes leading to delayed fracture healing, non-union or re-fracture.
- the proximal end of the long bone marrow internal fixation system is relatively large, the structural damage of the trabecular bone is more serious, and the placement effect is more obvious, which affects the growth of the trabecular bone, which is not conducive to the recovery of bone structure in the later stage.
- the bones strive to achieve an optimal structure, that is, the shape and material of the bone are regulated by the level of individual activity, so that it is sufficient to bear the mechanical load, but does not increase the burden of metabolic transport.
- the change rule of the fracture remodeling process shows that if there is a displacement after the fracture, The concave side will have significant osteophyte formation, the internal trabecular bone will be aligned along the direction of transmission of compressive stress, and the bone will be absorbed on the convex side.
- femoral neck fractures intertrochanteric fractures, distal femoral fractures, and proximal humeral fractures are common clinical injuries.
- gamma nails, hollow (tension) screws, etc. are needed for the main complications. Including fracture nonunion, delayed healing, loose internal fixation, and fracture.
- the technical problem to be solved by the present invention is to provide an intramedullary fixation device capable of promoting fracture healing.
- the intramedullary fixation device utilizes the theory of bionic internal fixation to make the fracture recovery follow the conduction and load characteristics of the fracture itself, and can make the fracture treatment Achieve satisfactory restoration and healing effects.
- the present invention adopts the following technical solutions:
- an intramedullary fixation device capable of promoting fracture healing, characterized in that the intramedullary fixation device comprises a plurality of short cylinders and a plurality of connecting structures, and the plurality of short cylinders are spaced apart from each other; A plurality of connecting structures respectively connect the adjacent two of the short cylinders, each of the connecting structures having a plurality of spaces for the growth of the trabecular bone.
- the short cylinder has a cross-sectional shape that is circular, elliptical or conformal to the curvature of the bone.
- the short cylinders are 2-10.
- the shortest end of the short cylinder is provided with a thread.
- the connecting structure comprises a plurality of columns arranged in a gap with each other, and two ends of each column are respectively connected to two adjacent short cylinders, and an adjacent two columns are formed between The space in which the trabecular bone grows.
- the plurality of columns are evenly distributed along the circumferential direction of the barrel, and the columns are parallel to the center line of the short barrel.
- the columns between adjacent two short cylinders are 2-50.
- the connecting structure further includes a plurality of tie rods, two ends of each of the tie rods are respectively connected to two adjacent short barrels, and an adjacent shaft and a column are formed for the bone The space in which the trabeculae grow.
- the pull rod is a diagonal rod or a crossed double rod.
- the connecting structure is a three-dimensional network cross-linked body having a plurality of mutually communicating holes on the three-dimensional network cross-linked body to form the space for the growth of the trabecular bone.
- the cross-sectional shape of the pores of the three-dimensional network cross-linked body is circular, elliptical or polygonal.
- the intramedullary fixation device capable of promoting fracture healing of the present invention is formed by connecting a plurality of short cylinders and a plurality of columns, the short cylinder can provide sufficient support strength, and the joint structure has a plurality of spaces for the growth of the trabecular bone.
- the intramedullary fixation device of the invention can allow the trabecular bone to grow along the space of the connecting structure, achieve the simultaneous growth of the intramedullary and extramedullary epiphyses, shorten the fracture healing time, restore the physiological and mechanical characteristics, and reduce various complications of fractures and operations.
- the invention can promote the fracture healing of the intramedullary fixation device, utilizes the bionic internal fixation theory, adopts a novel bionic intramedullary fixation device which is more in line with the anatomical structure of the bone and the biomechanical structural characteristics, so that the fracture recovery follows the conduction and load characteristics of the fracture itself. It can achieve satisfactory reduction and healing effects in fracture treatment.
- FIG. 1 is a schematic structural view of an embodiment of an intramedullary fixation device capable of promoting fracture healing according to the present invention
- Figure 2 is a cross-sectional view taken along line A-A of Figure 1;
- Fig. 3 is a schematic view showing the structure of another embodiment of the intramedullary fixation device capable of promoting fracture healing according to the present invention.
- Fig. 4 is a partial perspective view of the connecting structure in the intramedullary fixation device of Fig. 3 capable of promoting fracture healing.
- the figure is marked as follows: short cylinder 1, column 2, tie rod 3, thread 4, and three-dimensional network crosslinked body 5.
- FIG. 1 is a schematic structural view of an embodiment of an intramedullary fixation device capable of promoting fracture healing according to the present invention
- FIG. 2 is a cross-sectional view taken along line A-A of FIG.
- An embodiment of the intramedullary fixation device capable of promoting fracture healing of the present invention comprises a plurality of short cylinders 1 spaced apart from each other and a plurality of connection structures arranged at a distance from each other.
- the plurality of connecting structures respectively connect the adjacent two short cylinders 1, each connecting structure having a plurality of spaces for the growth of the trabecular bone.
- the height of the short cylinder 1 can be less than or equal to the height of the connection structure.
- the height of the short cylinder 1 can be, for example, between 5 and 300 mm.
- the plurality of short cylinders 1 are all cylindrical and have the same diameter, and the plurality of short cylinders 1 are arranged up and down along the central axis, and the number of the short cylinders 1 is 2-10.
- the intramedullary fixation device of different lengths can be used, and the intramedullary fixation device of a suitable length can be selected according to actual needs.
- the diameter and length of the intramedullary fixation device can be the same as conventional intramedullary nails used in general surgery.
- the cross-sectional shape of the short cylinder 1 may be an elliptical shape or a shape conforming to the local curvature of the bone, for example, the short cylinder 1 is a tapered cylinder or the like. Different shapes of the short cylinders 1 can be arbitrarily combined.
- the connecting structure comprises a plurality of columns 2 arranged at a mutual gap, and two ends of each column 2 are respectively connected to two adjacent short cylinders 1, and an adjacent two columns 2 are formed.
- the plurality of columns 2 are evenly distributed along the circumferential direction of the cylinder, and the columns 2 are parallel to the center line of the short cylinder.
- the column between the adjacent two short cylinders 1 is 2-50.
- the connecting structure further includes a plurality of tie rods 3, two ends of each of the tie rods are respectively connected to the adjacent two short cylinders 1, and are located between the adjacent two columns 2, between the adjacent tie rods 3 and the columns 2 Form a space for the growth of the trabecular bone.
- the drawbar can be a diagonal rod or a crossed double rod.
- the tie rod 3 can increase the strength and stability of the intramedullary fixation device, and can improve the overall elastic modulus of the intramedullary fixation device, and the internal fixation strength is enhanced to prevent breakage, stress fracture, and the like.
- the inner wall of the short barrel 1 at the lowermost end of the intramedullary fixation device has a thread 4 which can be matched with the thread of the front end of the handle of a take-up device, thereby facilitating the operator to complete the insertion. And remove the fracture after healing.
- the short cylinder 1 and the column 2 and the tie rod 3 of the present invention can be fabricated by 3D printing technology or by integral casting.
- connection structure between the short cylinders 1 of the invention can allow the trabecular bone to grow along the space connection between the column 2 and the tie rod 3, to achieve simultaneous growth of the intramedullary and extramedullary epiphyses, shorten the fracture healing time, and reduce various fractures and operations. complication.
- the intramedullary fixation device with 2-10 columns 2 and diagonal tie rods 3 is suitable for the elderly population. More than 10 column 2 and oblique rods 3 are more suitable for the young and middle-aged people. .
- FIG. 3 is a schematic structural view of another embodiment of the intramedullary fixation device capable of promoting fracture healing according to the present invention
- FIG. 4 is a connection structure of the intramedullary fixation device capable of promoting fracture healing shown in FIG. Partial perspective view.
- the intramedullary fixation device of this embodiment includes a plurality of short barrels 1 and a plurality of connection structures. This embodiment differs from the actual intramedullary fixation device shown in Figure 1 only in that:
- the connecting structure is a three-dimensional network cross-linked body 5 having a plurality of mutually communicating holes 51, and the mutually communicating holes 51 form a space for the growth of the trabecular bone.
- the cross-sectional shape of the hole 51 of the three-dimensional network cross-linking body may be circular, elliptical, polygonal or other shapes.
- the invention utilizes the bionic internal fixation theory and adopts a novel bionic intramedullary fixation device which is more in line with the anatomical structure of the bone, especially the biomechanical structure, so that the fracture recovery follows the conduction and load characteristics of the fracture itself, and the fracture treatment can be satisfactorily reset and healing effect.
- the invention is an innovation of the fracture reduction and fixation technique, and solves the problem that the bone canal healing is poor, especially affecting the bone healing strength after the treatment of osteoporotic fracture in the elderly, and sometimes the fracture may be delayed and the fracture is difficult. .
- microporous bionic fracture intramedullary fixation device of the invention is suitable for internal fixation of long bone fractures, especially for complex trabecular bone fractures near the joint, combined with minimally invasive techniques and image navigation technology support, has good expectations and can be obtained. Significant economic and social benefits.
- the intramedullary fixation device capable of promoting fracture healing of the present invention is formed by connecting a plurality of short cylinders and a plurality of columns, the short cylinder can provide sufficient support strength, and the joint structure has a plurality of spaces for the growth of the trabecular bone.
- the intramedullary fixation device of the invention can allow the trabecular bone to grow along the space of the connecting structure, achieve the simultaneous growth of the intramedullary and extramedullary epiphyses, shorten the fracture healing time, restore the physiological and mechanical characteristics, and reduce various complications of fractures and operations.
- the invention can promote the fracture healing of the intramedullary fixation device, utilizes the bionic internal fixation theory, adopts a novel bionic intramedullary fixation device which is more in line with the anatomical structure of the bone and the biomechanical structural characteristics, so that the fracture recovery follows the conduction and load characteristics of the fracture itself. It can achieve satisfactory reduction and healing effects in fracture treatment.
Abstract
一种能够促进骨折愈合的髓内固定装置，其特征在于，髓内固定装置包括多个短筒体（1）和多个连接结构，多个短筒体（1）相互间隔布置；多个连接结构分别连接相邻的两个短筒体（1），每个连接结构具有多个供骨小梁生长的空间。该能够促进骨折愈合的髓内固定装置由多个短筒体（1）和多个立柱（2）相互连接而成，短筒体（1）可以提供足够的支撑强度，连接结构具有多个供骨小梁生长的空间。该髓内固定装置可以允许骨小梁沿连接结构的空间长入，达到髓内外骨痂同时生长，缩短骨折愈合时间，恢复生理力学特性，减少骨折及手术的各种并发症。
Description
本发明涉及一种对骨折进行固定和促进愈合的髓内固定装置，属于骨科医疗器械技术领域。
长骨骨折是临床常见骨折，目前多采用钢板内固定及髓内钉内固定的方法进行治疗。使用传统的钢板内固定方法治疗需要切开组织显露骨折区域，的切口长、创伤大，然后进行复位内固定，这种方法对骨折周围的软组织损伤大、术中出血多、副损伤多，并且还需将钢板取出，病人手术后恢复时间长。使用传统的髓内钉内固定方法，需要进行扩髓，相应带来扩髓的相应并发症，例如脂肪栓塞、肺栓塞等。更普遍的影响是，骨折内固定物置入后由于内置物的容积占位效应，影响两个断端的骨小梁的生长和连续性的恢复。人体骨骼内骨小梁具有重要的功能，其连接周围骨皮质，增强骨骼整体强度；此外，其构成髓腔内重要的力学传导和转化功能，在骨皮质承受各种负荷时可以使受力更加均衡、合理，并将局部过大负荷传导、分散至其他部位。以股骨近端为例，股骨颈与股骨干之间存在约110°～140°的颈干角，股骨颈轴线与股骨两髁间连线形成股骨颈前倾角，因此股骨颈承受压力、张力和剪力。股骨颈内有压力骨小梁和张力骨小梁系统构成的桁架结构，转化其所承受的弯矩和扭矩并传导至骨干，分散局部应力，降低骨折风险；如果股骨近端不存在这样的桁架结构，当股骨干在暴力作用下股骨颈会承受较大的弯矩和扭矩，发生骨折的风险更高。骨小梁重建后可有效恢复髓内血运系统，有助于骨松质和骨皮质的愈合。骨小梁结构中断后如不能恢复，在骨折愈合过程中髓内外骨痂生长不均衡，尤其是老年人骨质疏松性骨折，可能骨皮质愈合后，骨松质愈合较差，影响骨骼愈合强度及对正常负荷的传导，有时可导致骨折延迟愈合、不愈合或再骨折。且长骨髓内固定系统的近端远端较粗大，骨小梁结构破坏更加严重，置入占位效应更加明显，影响骨小梁长入，不利于后期骨质结构恢复。
在骨折治疗中，还要考虑如何根据骨骼结构进行复位和固定，这将直接影响到骨折部位的复原程度，成为手术成败的关键。骨骼在生长过程中力求达到一种最佳结构，即骨骼的形态与物质受个体活动水平的调控，使之足够承担力学负载，但并不增加代谢转运的负担。根据上述原理，骨折再塑过程的变化规律显示，骨折后如有移位，在
凹侧将有明显骨痂形成，其内部骨小梁将沿着压应力的传递方向排列，而在凸侧将有骨的吸收。
目前，股骨颈骨折、粗隆间骨折、股骨远端骨折、胫骨近端骨折是临床常见损伤，在治疗中需要进行包括伽马钉(Gamma)、空心(拉力)螺钉等固定，其主要并发症包括骨折不愈合、延迟愈合、内固定物松动、断裂。
随着骨科内固定技术的不断发展，非常有必要设计新的固定装置，使骨折治疗在生物学及生物力学原理的指导下，使骨折的皮质与主要骨小梁同时生长重建，实现皮质骨、松质骨同时愈合。这样会加快骨折愈合速度、提高骨折愈合质量和强度，降低骨折不愈合、延迟愈合、内固定物松动、断裂等并发症的发生率，以提高治疗效果，减轻患者的痛苦。
在所述背景技术部分公开的上述信息仅用于加强对本公开的背景的理解，因此它可以包括不构成对本领域普通技术人员已知的现有技术的信息。
发明内容
本发明所要解决的技术问题是提供一种能够促进骨折愈合的髓内固定装置，这种髓内固定装置利用了仿生内固定理论，使骨折恢复遵循骨折自身的传导和负荷特点，能够使骨折治疗达到满意的复位和愈合效果。
本发明的额外方面和优点将部分地在下面的描述中阐述，并且部分地将从描述中变得显然，或者可以通过本公开的实践而习得。
为实现上述目的，本发明采用如下技术方案：
根据本发明的一个方面，一种能够促进骨折愈合的髓内固定装置，其特征在于，所述髓内固定装置包括多个短筒体和多个连接结构，多个短筒体相互间隔布置；多个连接结构分别连接相邻的两个所述短筒体，每个所述连接结构具有多个供骨小梁生长的空间。
根据本发明的一实施方式，所述短筒体的横截面形状为圆形、椭圆形或者与骨骼局部曲率适形的形状。
根据本发明的一实施方式，所述短筒体为2-10个。
根据本发明的一实施方式，最末端的所述短筒体上设有螺纹。
根据本发明的一实施方式，所述连接结构包括相互间隙布置的多个立柱，每个立柱的两端分别连接相邻的两个所述短筒体，相邻的两个立柱之间形成供所述骨小梁生长的所述空间。
根据本发明的一实施方式，所述多个立柱沿所述筒体圆周方向均匀分布，且所述立柱平行于所述短筒体的中心线。
根据本发明的一实施方式，相邻两个短筒体之间的立柱为2-50根。
根据本发明的一实施方式，所述连接结构还包括多个拉杆，每个拉杆的两端分别连接相邻的两个所述短筒体，相邻的拉杆和立柱之间形成供所述骨小梁生长的所述空间。
根据本发明的一实施方式，所述拉杆为一斜杆或交叉双杆。
根据本发明的一实施方式，所述连接结构为立体网状交联体，所述立体网状交联体上具有多个相互连通的孔，形成供所述骨小梁生长的所述空间。
根据本发明的一实施方式，所述立体网状交联体的孔的横截面形状为圆形、椭圆形或多边形。
由上述技术方案可知，本发明的有益效果是：
本发明能够促进骨折愈合的髓内固定装置由多个短筒体和多个立柱相互连接而成，短筒体可以提供足够的支撑强度，连接结构具有多个供骨小梁生长的空间。本发明的髓内固定装置可以允许骨小梁沿连接结构的空间长入，达到髓内外骨痂同时生长，缩短骨折愈合时间，恢复生理力学特性，减少骨折及手术的各种并发症。
本发明能够促进骨折愈合的髓内固定装置，利用了仿生内固定理论，采用更加符合骨骼解剖结构及生物力学结构特性的新型仿生髓内固定装置，使骨折恢复遵循骨折自身的传导和负荷特点，能够使骨折治疗达到满意的复位和愈合效果。
本发明中通过以下参照附图对优选实施例的说明，本发明的上述以及其它目的、特征和优点将更加明显。
图1是本发明能够促进骨折愈合的髓内固定装置一实施方式的结构示意图；
图2是图1的A-A剖视图；
图3是本发明能够促进骨折愈合的髓内固定装置另一实施方式的结构示意图。
图4是图3所示的能够促进骨折愈合的髓内固定装置中的连接结构的部分立体图。
图中标记如下：短筒体1、立柱2、拉杆3、螺纹4、立体网状交联体5。
现在将参考附图更全面地描述示例实施方式。然而，示例实施方式能够以多种形式实
施，且不应被理解为限于在此阐述的实施方式；相反，提供这些实施方式使得本公开将全面和完整，并将示例实施方式的构思全面地传达给本领域的技术人员。图中相同的附图标记表示相同或类似的结构，因而将省略它们的详细描述。
参见图1和图2，图1是本发明能够促进骨折愈合的髓内固定装置一实施方式的结构示意图；图2是图1的A-A剖视图。本发明能够促进骨折愈合的髓内固定装置一实施方式包括相互间隔布置的多个短筒体1以及相互间隔布置的多个连接结构。其中多个连接结构分别连接相邻的两个短筒体1，每个连接结构具有多个供骨小梁生长的空间。短筒体1的高度可以小于或等于连接结构的高度。短筒体1的高度例如可以在5-300mm之间。
图1所示的实施方式中，多个短筒体1均为圆筒，且直径相同，多个短筒体1沿着中心轴线上下顺序排列，短筒体1的数量为2-10个，组成不同长度的髓内固定装置，使用时可以根据实际需要选用合适长度的髓内固定装置。髓内固定装置的直径和长度可以与一般手术中使用的传统的髓内钉相同。
在其他实施方式中，短筒体1的横截面形状为也可以是椭圆形或者与骨骼局部曲率适形的形状，例如短筒体1为锥形筒等。不同形状的短筒体1可任意组合。
图1所示的实施方式中，连接结构包括相互间隙布置的多个立柱2，每个立柱2的两端分别连接相邻的两个短筒体1，相邻的两个立柱2之间形成供骨小梁生长的空间。多个立柱2沿筒体圆周方向均匀分布，且立柱2平行于短筒体的中心线。相邻两个短筒体1之间的立柱为2-50根。
连接结构还进一步包括多个拉杆3，每个拉杆的两端分别连接相邻的两个短筒体1，并位于相邻的两个立柱2之间，相邻的拉杆3和立柱2之间形成供骨小梁生长的空间。拉杆可为一斜杆或交叉双杆。拉杆3可增加髓内固定装置的强度和稳定性，可使髓内固定装置的整体弹性模量更好，内固定强度得到增强，可以防止出现断裂、应力性折断等的情况。
如图1所示，在髓内固定装置最下端的短筒体1的圆周内壁上有螺纹4，该螺纹4可以与一取出装置的把手的前端螺纹相匹配，从而便于手术操作人员完成置入及骨折愈合后取出。
本发明的短筒体1及立柱2、拉杆3可以采用3D打印技术制作或采用一体铸造完成。
本发明短筒体1之间的连接结构可以允许骨小梁沿立柱2和拉杆3之间的空间连接长入，达到髓内外骨痂同时生长，缩短骨折愈合时间，减少骨折及手术的各种并发症。采用2-10根立柱2和斜向拉杆3较少的髓内固定装置适用于老年人群，超过10根立柱2及斜向拉杆3较多的髓内固定装置适用于中青年劳动强度大的人群。
参见图3和图4，图3是本发明能够促进骨折愈合的髓内固定装置另一实施方式的结构示意图，图4是图3所示的能够促进骨折愈合的髓内固定装置中的连接结构的部分立体图。如图3所示，该实施方式的髓内固定装置包括多个短筒体1和多个连接结构。该实施方式与图1所示实的髓内固定装置的不同之处仅在于：
连接结构为立体网状交联体5，立体网状交联体5上具有多个相互连通的孔51，相互连通的孔51形成供骨小梁生长的空间。其中立体网状交联体的孔51的横截面形状可以为圆形、椭圆形、多边形或者其他形状。
图3所示的实施方式的其他结构与图1所示实的髓内固定装置相同，这里不再赘述。
本发明利用了仿生内固定理论，采用更加符合骨骼解剖结构尤其是生物力学结构特性的新型仿生髓内固定装置，使骨折恢复遵循骨折自身的传导和负荷特点，能够使骨折治疗达到满意的复位和愈合效果。
本发明是骨折复位固定技术的创新，解决了尤其是老年人骨质疏松性骨折治疗后，骨松质愈合较差，影响骨骼愈合强度，有时候可能导致骨折延迟愈合及再骨折的老大难问题。
本发明的微孔仿生骨折髓内固定装置适用于全身长骨骨折内固定治疗，尤其适用于关节附近复杂骨小梁结构骨折，结合微创技术及影像导航技术的支持，具有良好的预期，可以获得显著的经济和社会效益。
本发明能够促进骨折愈合的髓内固定装置由多个短筒体和多个立柱相互连接而成，短筒体可以提供足够的支撑强度，连接结构具有多个供骨小梁生长的空间。本发明的髓内固定装置可以允许骨小梁沿连接结构的空间长入，达到髓内外骨痂同时生长，缩短骨折愈合时间，恢复生理力学特性，减少骨折及手术的各种并发症。本发明能够促进骨折愈合的髓内固定装置，利用了仿生内固定理论，采用更加符合骨骼解剖结构及生物力学结构特性的新型仿生髓内固定装置，使骨折恢复遵循骨折自身的传导和负荷特点，能够使骨折治疗达到满意的复位和愈合效果。
虽然已参照几个典型实施例描述了本发明，但应当理解，所用的术语是说明和示例性、而非限制性的术语。由于本发明能够以多种形式具体实施而不脱离发明的精神或实质，所以应当理解，上述实施例不限于任何前述的细节，而应在随附权利要求所限定的精神和范围内广泛地解释，因此落入权利要求或其等效范围内的全部变化和改型都应为随附权利要求所涵盖。
Claims (11)
- 一种能够促进骨折愈合的髓内固定装置，其特征在于，所述髓内固定装置包括：多个短筒体，相互间隔布置；多个连接结构，分别连接相邻的两个所述短筒体，每个所述连接结构具有多个供骨小梁生长的空间。
- 根据权利要求1所述的能够促进骨折愈合的髓内固定装置，其特征在于，所述短筒体的横截面形状为圆形、椭圆形或者与骨骼局部曲率适形的形状。
- 根据权利要求1所述的能够促进骨折愈合的髓内固定装置，其特征在于，所述短筒体为2-10个。
- 根据权利要求1所述的能够促进骨折愈合的髓内固定装置，其特征在于，最末端的所述短筒体上设有螺纹。
- 根据权利要求1-4任一项所述的能够促进骨折愈合的髓内固定装置，其特征在于，所述连接结构包括相互间隙布置的多个立柱，每个立柱的两端分别连接相邻的两个所述短筒体，相邻的两个立柱之间形成供所述骨小梁生长的所述空间。
- 根据权利要求5所述的能够促进骨折愈合的髓内固定装置，其特征在于，所述多个立柱沿所述筒体圆周方向均匀分布，且所述立柱平行于所述短筒体的中心线。
- 根据权利要求5所述的能够促进骨折愈合的髓内固定装置，其特征在于，相邻两个短筒体之间的立柱为2-50根。
- 根据权利要求5所述的能够促进骨折愈合的髓内固定装置，其特征在于，所述连接结构还包括多个拉杆，每个拉杆的两端分别连接相邻的两个所述短筒体，相邻的拉杆和立柱之间形成供所述骨小梁生长的所述空间。
- 根据权利要求8所述的能够促进骨折愈合的髓内固定装置，其特征在于，所述拉杆为一斜杆或交叉双杆。
- 根据权利要求5所述的能够促进骨折愈合的髓内固定装置，其特征在于，所述连接结构为立体网状交联体，所述立体网状交联体上具有多个相互连通的孔，形成供所述骨小梁生长的所述空间。
- 根据权利要求10所述的能够促进骨折愈合的髓内固定装置，其特征在于，所述立体网状交联体的孔的横截面形状为圆形、椭圆形或多边形。
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| CN201510773308.4A CN105232136A (zh) | 2015-11-13 | 2015-11-13 | 一种能有效促进骨折愈合的髓内固定装置 |
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