技术领域technical field
本发明涉及一种人工假体，具体涉及一种假体柄可延长式肿瘤型人工膝关节假体。The invention relates to an artificial prosthesis, in particular to a tumor-type artificial knee joint prosthesis with an extendable prosthesis handle.
背景技术Background technique
对于骨骺未闭的儿童膝关节周围恶性肿瘤患者，肿瘤型关节假体置换是常见的治疗方式。但由于健侧肢体持续生长，而患侧生长受限，术后常出现双侧肢体不等长，严重影响患者功能。目前临床广泛采用的组配式肿瘤型人工膝关节如需延长，则需更换部分假体组件，手术创伤较大，术后感染率高。而现有可延长假体往往存在术中操作复杂，术后强度不可靠导致长度丢失等问题。For pediatric patients with malignant tumors around the knee joint with patent epiphysis, tumor-type joint prosthesis replacement is a common treatment modality. However, due to the continuous growth of the uninjured limb and the restricted growth of the affected side, unequal lengths of bilateral limbs often occur after surgery, seriously affecting the function of the patient. At present, if the modular tumor-type artificial knee joint widely used in clinical practice needs to be extended, part of the prosthetic components need to be replaced, resulting in large surgical trauma and high postoperative infection rate. However, the existing extendable prosthesis often has problems such as complicated operation during operation, unreliable postoperative strength and length loss.
发明内容Contents of the invention
针对上述问题，本发明的目的是提供一种假体柄可延长式肿瘤型人工膝关节假体。In view of the above problems, the object of the present invention is to provide a prosthetic prosthesis with prosthetic prosthesis.
为实现上述目的，本发明采取以下技术方案：一种假体柄可延长式肿瘤型人工膝关节假体，其特征在于，该人工膝关节假体包括：固定外套筒，转动设置于所述固定外套筒内且具有内螺纹的活动内套筒，沿径向转动支撑于所述固定外套筒内、且能驱动所述活动内套筒转动的主动旋转轴，沿轴向可转动地设置在所述活动内套筒内、且与所述活动内套筒为螺纹连接的假体柄组件，以及锥接于所述固定外套筒下部的股骨髁组件；所述活动内套筒的转动能驱使所述假体柄组件产生位移。In order to achieve the above object, the present invention adopts the following technical solutions: a prosthesis stem prosthesis tumor-type artificial knee prosthesis, characterized in that the artificial knee prosthesis includes: a fixed outer sleeve, which is rotatably arranged on the The movable inner sleeve with internal thread in the fixed outer sleeve is rotatably supported in the radial direction, and the active rotating shaft that can drive the rotation of the movable inner sleeve is rotatable in the axial direction. The prosthetic stem component that is arranged in the movable inner sleeve and is threadedly connected with the movable inner sleeve, and the femoral condyle component that tapers to the lower part of the fixed outer sleeve; the movable inner sleeve Rotational energy drives displacement of the prosthetic stem assembly.
在一个优选的实施例中，所述固定外套筒为上端敞口、下端封闭的筒形结构，所述固定外套筒的敞口端设置有一封隔垫。In a preferred embodiment, the fixed outer sleeve is a cylindrical structure with an open upper end and a closed lower end, and a spacer is provided at the open end of the fixed outer sleeve.
在一个优选的实施例中，所述活动内套筒包括外壁光滑、内壁刻有内螺纹的直筒体和一体连接于所述直筒体底部的类似锥齿轮的锥齿体，所述活动内套筒转动地设置在所述固定外套筒内，且所述活动内套筒的直筒体上端抵在所述封隔垫上。In a preferred embodiment, the movable inner sleeve includes a straight cylinder body with a smooth outer wall and internal threads engraved on the inner wall, and a bevel tooth body similar to a bevel gear integrally connected to the bottom of the straight cylinder body, the movable inner sleeve It is rotatably arranged in the fixed outer sleeve, and the upper end of the straight cylinder of the movable inner sleeve abuts against the packing pad.
在一个优选的实施例中，所述主动旋转轴亦具有类似锥齿轮的锥齿体，所述主动旋转轴的锥齿体与所述活动内套筒的锥齿体相啮合。In a preferred embodiment, the active rotating shaft also has a bevel gear similar to a bevel gear, and the bevel gear of the active rotating shaft meshes with the bevel gear of the movable inner sleeve.
在一个优选的实施例中，所述股骨髁组件的顶部具有锥台，所述固定外套筒的底部开设有与所述股骨髁组件的锥台相配合的锥孔，所述股骨髁组件通过其锥台锥接在所述固定外套筒上。In a preferred embodiment, the top of the femoral condyle assembly has a truncated cone, and the bottom of the fixed outer sleeve is provided with a taper hole that matches the truncated cone of the femoral condyle assembly, and the femoral condyle assembly passes through Its truncated cone is connected to the fixed outer sleeve.
在一个优选的实施例中，所述假体柄组件包括刻有外螺纹的螺纹体和一体连接于所述螺纹体顶部的髓针，所述螺纹体螺纹连接于所述活动内套筒内，所述髓针顶端贯穿所述封隔垫后延伸至所述固定外套筒外。In a preferred embodiment, the prosthesis stem assembly includes a threaded body engraved with external threads and a medullary needle integrally connected to the top of the threaded body, the threaded body is threaded into the movable inner sleeve, The top end of the medullar needle extends out of the fixed outer sleeve after penetrating the septum.
在一个优选的实施例中，所述封隔垫采用聚乙烯材质制作而成。In a preferred embodiment, the spacer is made of polyethylene.
本发明由于采取以上技术方案，其具有以下优点：本发明通过巧妙的机械设计，实现了术中仅需一个小切口显露主动旋转轴，即可方便、可靠地实现假体延长，避免了常规切口、更换假体组件的延长方式带来的软组织二次损伤以及术后高感染率。因此，本发明为儿童膝关节周围恶性肿瘤切除后的重建提供了简便、可靠的解决方案。Due to the adoption of the above technical solutions, the present invention has the following advantages: the present invention only needs a small incision to expose the active rotation axis during the operation through the ingenious mechanical design, and can realize the extension of the prosthesis conveniently and reliably, avoiding the conventional incision , Secondary injury of soft tissue and high postoperative infection rate caused by the extension method of replacing prosthetic components. Therefore, the present invention provides a simple and reliable solution for reconstruction after resection of malignant tumors around the children's knee joint.
附图说明Description of drawings
图1为本发明的整体结构示意图。Figure 1 is a schematic diagram of the overall structure of the present invention.
具体实施方式detailed description
下面结合附图和实施例对本发明进行详细的描述。然而应当理解，附图的提供仅为了更好地理解本发明，它们不应该理解成对本发明的限制。The present invention will be described in detail below in conjunction with the accompanying drawings and embodiments. However, it should be understood that the accompanying drawings are provided only for better understanding of the present invention, and they should not be construed as limiting the present invention.
如图1所示，本发明提供的人工膝关节假体包括固定外套筒1、活动内套筒2、横向旋转轴3、股骨髁组件4和假体柄组件5。其中，固定外套筒1为上端敞口、下端封闭的筒形结构，固定外套筒1的敞口端设置有一封隔垫6。活动内套筒2包括外壁光滑、内壁刻有内螺纹的直筒体21和一体连接于直筒体21底部的类似锥齿轮的锥齿体22，活动内套筒2可转动地设置在固定外套筒1内，且活动内套筒2的直筒体31上端抵在封隔垫6上。横向旋转轴3沿径向转动支撑在固定外套筒1内，且其上亦具有类似锥齿轮的锥齿体31，活动内套筒2的锥齿体22与横向旋转轴3的锥齿体31相啮合。股骨髁组件4的顶部具有锥台，固定外套筒1底部开设有与股骨髁组件4的锥台相配合的锥孔，股骨髁组件4通过其锥台锥接在固定外套筒1上。假体柄组件5包括刻有外螺纹的螺纹体51和一体地连接于螺纹体51顶部的髓针52，螺纹体51螺纹连接于活动内套筒2内，髓针52顶端贯穿封隔垫6后延伸至固定外套筒1外。As shown in FIG. 1 , the artificial knee joint prosthesis provided by the present invention includes a fixed outer sleeve 1 , a movable inner sleeve 2 , a transverse rotation shaft 3 , a femoral condyle component 4 and a prosthesis handle component 5 . Wherein, the fixed outer sleeve 1 is a cylindrical structure with an open upper end and a closed lower end, and a spacer 6 is provided at the open end of the fixed outer sleeve 1 . The movable inner sleeve 2 includes a straight cylinder body 21 with a smooth outer wall and an internal thread engraved on the inner wall, and a bevel gear body 22 integrally connected to the bottom of the straight cylinder body 21, which is similar to a bevel gear. The movable inner sleeve 2 is rotatably arranged on the fixed outer sleeve 1, and the upper end of the straight cylinder body 31 of the movable inner sleeve 2 abuts against the packing 6. The horizontal rotation shaft 3 is rotatably supported in the fixed outer sleeve 1 in the radial direction, and there is also a bevel tooth body 31 similar to a bevel gear on it. 31 are meshed. The top of the femoral condyle assembly 4 has a frustum, and the bottom of the fixed outer sleeve 1 is provided with a taper hole matched with the frustum of the femoral condyle assembly 4, and the femoral condyle assembly 4 is connected to the fixed outer sleeve 1 through its frustum. The prosthetic stem assembly 5 includes a threaded body 51 engraved with external threads and a medullary needle 52 integrally connected to the top of the threaded body 51. The threaded body 51 is threaded into the movable inner sleeve 2, and the top end of the medullary needle 52 penetrates the packing 6 After extending to the outside of the fixed outer sleeve 1.
本发明在使用时，可以根据患者的实际情况选择合适型号的股骨髁组件4和假体柄组件5，人工膝关节假体与胫骨侧假体相组合使用，假体柄组件5的髓针52插入患者的股骨髓腔内，通过主动转动横向旋转轴3可使与之相啮合的活动内套筒2被动旋转，活动内套筒2旋转后可推出假体柄组件5向近端延伸，从而实现肢体延长。When the present invention is in use, the femoral condyle assembly 4 and the prosthesis handle assembly 5 of a suitable model can be selected according to the actual situation of the patient. The artificial knee joint prosthesis is used in combination with the tibial side prosthesis. It is inserted into the femoral medullary cavity of the patient, and the movable inner sleeve 2 engaged with it can be passively rotated by actively rotating the transverse rotation shaft 3. After the movable inner sleeve 2 rotates, the prosthetic handle assembly 5 can be pushed out and extended to the proximal end, thereby Achieve limb lengthening.
在一个优选的实施例中，封隔垫6采用聚乙烯材质制作而成，由于患者的股骨与人工膝关节假体界面间存在封隔垫6，避免了骨长入。In a preferred embodiment, the sealing pad 6 is made of polyethylene material, since the sealing pad 6 exists between the patient's femur and the artificial knee joint prosthesis interface, bone ingrowth is avoided.
在一个优选的实施例中，横向旋转轴3的一端刻有十字槽，以便于旋转横向旋转轴4。In a preferred embodiment, one end of the horizontal rotation shaft 3 is engraved with a cross groove, so as to facilitate the rotation of the horizontal rotation shaft 4 .
上述各实施例仅用于说明本发明，其中各部件的结构、连接方式和制作工艺等都是可以有所变化的，凡是在本发明技术方案的基础上进行的等同变换和改进，均不应排除在本发明的保护范围之外。The above-mentioned embodiments are only used to illustrate the present invention, wherein the structure, connection mode and manufacturing process of each component can be changed to some extent, and any equivalent transformation and improvement carried out on the basis of the technical solution of the present invention should not excluded from the protection scope of the present invention.
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710532932.4ACN107242918B (en) | 2017-07-03 | 2017-07-03 | Tumor type artificial knee joint prosthesis with extensible prosthesis handle |
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710532932.4ACN107242918B (en) | 2017-07-03 | 2017-07-03 | Tumor type artificial knee joint prosthesis with extensible prosthesis handle |
| Publication Number | Publication Date |
|---|---|
| CN107242918Atrue CN107242918A (en) | 2017-10-13 |
| CN107242918B CN107242918B (en) | 2024-02-13 |
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710532932.4AActiveCN107242918B (en) | 2017-07-03 | 2017-07-03 | Tumor type artificial knee joint prosthesis with extensible prosthesis handle |
| Country | Link |
|---|---|
| CN (1) | CN107242918B (en) |
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110840629A (en)* | 2019-11-25 | 2020-02-28 | 北京市春立正达医疗器械股份有限公司 | Extendable prosthesis stem and knee joint prosthesis using the same |
| CN113101016A (en)* | 2021-05-13 | 2021-07-13 | 北京爱康宜诚医疗器材有限公司 | Prosthetic connectors and prosthetic components |
| CN113974917A (en)* | 2021-11-16 | 2022-01-28 | 北京大学人民医院 | Tumor type artificial knee joint with double shafts capable of being automatically lengthened |
| CN114052992A (en)* | 2021-11-08 | 2022-02-18 | 北京市春立正达医疗器械股份有限公司 | Can prolong upper arm bone false body |
| CN114587716A (en)* | 2022-03-28 | 2022-06-07 | 中南大学湘雅医院 | Femoral stem prosthesis capable of preventing displacement loosening |
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| CN113974917A (en)* | 2021-11-16 | 2022-01-28 | 北京大学人民医院 | Tumor type artificial knee joint with double shafts capable of being automatically lengthened |
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