WO2011012030A1 - 骨折断端加压微动接骨板 - Google Patents

骨折断端加压微动接骨板 Download PDF

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Publication number
WO2011012030A1
WO2011012030A1 PCT/CN2010/074064 CN2010074064W WO2011012030A1 WO 2011012030 A1 WO2011012030 A1 WO 2011012030A1 CN 2010074064 W CN2010074064 W CN 2010074064W WO 2011012030 A1 WO2011012030 A1 WO 2011012030A1
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Prior art keywords
screw
inclined surface
screw hole
hole
bone plate
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PCT/CN2010/074064
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English (en)
French (fr)
Inventor
尹庆水
赖金平
张余
Original Assignee
Yin Qingshui
Lai Jinping
Zhang Yu
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Application filed by Yin Qingshui, Lai Jinping, Zhang Yu filed Critical Yin Qingshui
Publication of WO2011012030A1 publication Critical patent/WO2011012030A1/zh

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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
    • A61B17/80—Cortical plates, i.e. bone plates; Instruments for holding or positioning cortical plates, or for compressing bones attached to cortical plates
    • A61B17/8004—Cortical plates, i.e. bone plates; Instruments for holding or positioning cortical plates, or for compressing bones attached to cortical plates with means for distracting or compressing the bone or bones
    • A61B17/8014—Cortical plates, i.e. bone plates; Instruments for holding or positioning cortical plates, or for compressing bones attached to cortical plates with means for distracting or compressing the bone or bones the extension or compression force being caused by interaction of the plate hole and the screws

Definitions

  • the invention relates to a bone plate broken end pressure micro-motion plate for treating a fracture of a human or animal body. It belongs to the field of medical device technology.
  • the traditional bone plate can stably fix the fracture end, but the fracture end can not be slightly moved, the stress shielding effect is obvious, the formation of the epiphysis is inhibited, and finally the delayed healing or non-healing is caused.
  • Recent studies have shown that the reason for this situation is that traditional bone plates and screws block the stress that should be withstood by the fracture ends, and effective 'flip motion' between the fracture ends can effectively promote fracture healing.
  • the bone plate 3 and the screw 5 are provided with a plurality of screw holes 4, and the structural feature is that the cross-sectional shape of the screw hole 4 at one end or all of the fracture line 2 is elongated by the fracture line 2.
  • the screw 5 can be slightly moved with the fracture end, thereby facilitating the formation of osteophytes between the fracture ends of the bone plate, promoting bone healing, and effectively preventing or reducing bone grafting. Breakage of the plate 3 and the screw 5.
  • this patent has the following disadvantages: (1) Since the contact surface of the bottom surface of the screw head is the inner wall of the countersunk screw, after the screw is fixed, the resistance of the micro-motion is relatively large, and it is difficult to achieve micro-motion, and therefore, at the fracture end The fretting 'effect is not good. (2) When the gap between the distal end of the fracture and the proximal end of the fracture is large, it is difficult to solve the 'flip motion' problem after the bone plate is installed, resulting in delayed healing or non-healing.
  • the technical problem to be solved by the present invention is to overcome the deficiencies of the prior art, and to provide a fractured end pressure micro-motion plate, which can effectively solve the problem of 'micro-motion' To accelerate fracture healing.
  • the fracture end of the compression micro-motion plate, including the bone plate and the screw, in the bone plate is provided with a plurality of screw holes that are coupled with the screw, the screw holes are located at the two ends of the fracture line, and the structural features are: fracture The wire is bounded, and at least one of the screw holes at one end has an inclined surface, and the head of the screw matched with the screw hole having the inclined surface has an abutting inclined surface, a screw hole having an inclined surface, and a head of the screw matched thereto
  • the joint of the portion forms a beveled connection structure.
  • the screw hole includes two structures, one structure having an inclined surface, one end of the fracture line, and a screw hole having an inclined surface, which is matched with the screw hole having the inclined surface
  • the screw has a kiss butt slope on the head and a beveled screw; the other structure has no inclined surface and is located at the other end of the fracture line, and the screw without the inclined surface constitutes a beveled screw.
  • the inclined surface is formed by a strip-shaped hole having a long strip shape, that is, a screw hole at one end of the fracture line has a strip shape along a longitudinal direction of the bone plate, and the strip shape
  • the inner side wall of the screw hole at least on a side away from the fracture line is a sloped surface, and the side of the screw head that is matched with the inclined surface is an inclined surface that is abutting and abutting.
  • An embodiment of the present invention is that the inclined surface is formed by a truncated inverted tapered hole, and the screw head matched with the inclined surface screw hole has a truncated inverted cone shape, and the truncated conical screw The connection of the hole and the matching screw head forms a beveled connection structure.
  • An embodiment of the present invention is: a friction pad having a low coefficient of friction with the bone plate between the bone plate and the bone plate at one end of the screw hole having the inclined surface; the friction pad is provided with an inclined surface
  • the screw holes cooperate with the communicating through holes.
  • the screw that cooperates with the screw hole having the inclined face comprises a hollow conical screw sleeve and a screw with the head in the conical screw sleeve.
  • the truncated inverted tapered screw hole is a through hole.
  • the fractured end pressure micro-motion plate according to the invention has the gap at the fracture end being as small as possible when the bone plate is installed, and the stress shielding effect can be further reduced after the installation, which is beneficial to the formation of the callus between the fracture ends. It promotes bone healing and facilitates the adjustment and control of the gap between the distal end of the fracture line or the proximal end of the fracture by screws, and can effectively prevent or reduce the fracture of the bone plate and the screw.
  • the compression screw and the distal end of the fracture do not bear the resistance from the screw hole and the periphery of the screw hole during the 'flip motion' to the proximal end of the fracture.
  • the compression plate is used to effectively fix the fracture, the bone plate is directly stressed by the partial pressure plate and the bone surface, even if the gap between the distal end of the fracture and the proximal end of the fracture is large, the bone plate is After installation, it can also effectively solve the 'micro-motion' problem, thus playing a role in accelerating fracture healing.
  • Fig. 1 is a plan view showing the mounting of the first embodiment of the present invention.
  • Fig. 2 is a schematic view showing the mounting process of the embodiment 1 of the present invention.
  • Fig. 3 is a schematic cross-sectional view showing the mounting of the embodiment 1 of the present invention.
  • Fig. 4 is a schematic cross-sectional view showing the mounting of the second embodiment of the present invention.
  • Fig. 5 is a schematic cross-sectional view showing the mounting of the third embodiment of the present invention.
  • the embodiment includes a bone plate 1 and a screw.
  • the fracture line 5 is bounded, and at least one of the screw holes 3 at one end has an inclined surface, and the head of the screw matched with the screw hole 3 having the inclined surface has an abutting butt surface, and the screw hole 3 having the inclined surface and the same
  • the joint of the head of the associated screw forms a beveled connection structure 9.
  • the screw hole includes two structures, one having an inclined surface, one end of the fracture line 5, and a screw hole 3 having an inclined surface, and a screw head matched with the screw hole 3 having the inclined surface 8 has a kiss butt slope and constitutes a beveled screw 2; the other structure has no inclined surface and is located at the other end of the fracture line 5, and the screw without the inclined surface constitutes the non-beveled screw 6.
  • D1 is the maximum distance of the distal end of the fracture when the rotating screw is rotated
  • D2 is the maximum distance of the distal end of the fracture when the distal force is F.
  • the inclined surface is formed by a strip-shaped hole having a long strip shape, that is, a screw hole 3 located at one end of the fracture line 5 has a long strip shape along the longitudinal direction of the bone plate 1, and the elongated screw hole is at least located away from each other.
  • the inner wall of one side of the fracture line 5 is a sloped surface, and the screw matched with it is a screw with a beveled slope 2, and a slope with an abutment butt joint.
  • the screw hole 3 is a through hole.
  • the screw hole located at the other end of the fracture line 5 is a flat screw hole, and the upper portion of the screw hole is located in the bone plate and is in the shape of a flat head.
  • the invention adopts the design of 'pressurized micro-rotation screw hole', and fixes the fracture by 'slanting surface pressure'; the 'nuclear distance' is reserved in the 'pressurized micro-action screw hole' (the length of this distance can be long or short, The latest research results, the best length is 1-2mm) that is, after the fracture end is fixed by pressure, under the action of external or internal force, the 'flip motion' can still be generated between the fracture ends; the 'micro-motion' is through the bone
  • the 'no-resistance design' of the board is realized, that is: (1) Compared with the traditional bone plate, the design of the screw hole of the bone plate is reserved with a 'micro-movable distance': the compression screw makes the bone plate fractured after the distal end 4 In the proximal movement of the fracture 7' micro-motion', during the 'micro-motion' process, it will not bear the resistance from the screw hole and the periphery of the screw hole; the bone plate 1
  • the plate is inclined and the bone surface is directly stressed.
  • the pressure generated by the screw is completely absorbed by the bone plate.
  • the screw hole and the periphery limit the movement of the screw to the proximal portion of the fracture.
  • the second embodiment is characterized in that: under the section of the bone plate 1 at one end of the screw hole 3 having the inclined surface, a friction pad 10 having a low friction coefficient with the bone plate 1 is provided; the friction pad 10 is provided with a through hole that communicates with the screw hole 3 having the inclined surface.
  • the principle of action of the second embodiment is that the friction pad 10 having a low coefficient of friction with the bone plate 1 is provided on the lower surface of the segment 1 of the bone plate 3 having the inclined surface of the screw hole 3, and therefore, when located on the bone plate 1
  • the nucleus low-friction coefficient gasket 10 generates micro-motion with the fracture end. At this time, the bone plate 1 does not move, and the damage to the fracture end due to the micro-motion can be overcome.
  • the third embodiment is characterized in that the screw 2 engaged with the screw hole 3 having the inclined surface includes a hollow conical screw sleeve 11 and a common screw 12 whose head is located in the conical screw sleeve 11.
  • the screw 2 that cooperates with the screw hole 3 whose inner wall is beveled includes the hollow conical screw sleeve 11 and the ordinary screw 12 that is sleeved in the conical screw sleeve, the resistance of the screw can be significantly reduced;
  • the great advantage is that a variety of outer diameter sized taper sleeves can be prepared for use to eliminate installation difficulties and other failures due to drilling distance errors during surgery.
  • the screw hole 3 is a through hole.
  • the screw holes in the traditional bone plate are all countersunk screw holes.
  • the feature of the fourth embodiment is that the inclined surface is formed by a truncated inverted tapered hole, and the screw head matched with the inclined screw hole 3 has a truncated inverted cone shape, and the truncated conical screw in the truncated cone
  • the connection of the hole 3 and the associated screw head forms a beveled connection 9.
  • a friction pad 10 is disposed under the section of the bone plate 1 at the end of the truncated conical screw hole 3, and the friction pad 10 is provided with a truncated cone which is in communication with the truncated conical screw hole 3. hole.
  • the rest is the same as in the specific embodiment 1.
  • the elongated shape of the elongated screw holes forming the inclined surface may include an elliptical shape, a rectangular shape or the like, but a preferred embodiment is an intermediate segment rectangular shape, and both ends are curved in conformity with the outer diameter of the screw outer diameter.
  • the bone plate 1 and the screw hole and the screw top contact surface are smooth surfaces to reduce the friction coefficient and facilitate the screw fretting.
  • the shape of the screw hole can be various, including curved, bent or elongated, etc., as long as the micro-motion-driven screw at the distal end of the fracture or the proximal end of the fracture is synchronously moved in the screw hole under stress.
  • the present invention is within the scope of the claimed invention.
  • the bone plate can be used with a variety of materials that can be used to fix fractures, including metals and non-metals.
  • the bottom surface of the end plate is preferably recessed to a depth corresponding to the thickness of the low friction coefficient pad, so that the bone under the bone plate is evenly loaded after installation.

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Description

[根据细则37.2由ISA制定的发明名称]　骨折断端加压微动接骨板 技术领域
本发明涉及一种用于治疗人体或动物体骨折的骨板断端加压微动接骨板。属于医疗器械技术领域。
背景技术
现有技术中，传统接骨板能稳定地固定骨折端，但骨折端间不能微动，应力遮挡效应明显，抑制了骨痂的形成，最终导致延迟愈合或不愈合。近年来的研究表明，出现这种情况的原因，是传统接骨板和螺钉遮挡了骨折断端本应该承受的应力，而骨折断端之间有效'微动'能够有效促进骨折愈合。
为了解决骨折断端之间的有效'微动'问题，本发明的申请人之一曾经在中国申请了专利号为'02244512.9'、名称为'低应力遮挡效应接骨板'的实用新型专利，包括设有多个螺孔4的接骨板3和螺钉5，其结构特点是：以骨折线2为界，位于骨折线2一端或全部的螺孔4的截面形状为长条形。这种接骨板3在固定后，当受到力的作用时，螺钉5可随骨折断端产生微动，从而有利于骨板断端间骨痂形成，促进骨愈合，同时可有效预防或减少接骨板3、螺钉5的断裂现象。但是，该专利存在如下缺点：（1）由于螺钉头部底面的接触面为沉头螺钉内壁，螺钉固定好后，微动的阻力比较大，难以实现微动，因此，在骨折断端处'微动'效果不好。（2）当骨折远端与骨折近端之间的间隙较大时，将骨板安装好后难以解决'微动'问题，从而导致延迟愈合或不愈合。
发明内容
本发明需要解决的技术问题，即本发明的目的，是为了克服现有技术有的不足，提供一种骨折断端加压微动接骨板，该微动接骨板可以有效解决'微动'问题，加快骨折愈合。
本发明的技术问题可以通过采取如下措施解决:
骨折断端加压微动接骨板，包括接骨板和螺钉，在接骨板中设有多个与螺钉配合连接的螺钉孔，所述螺钉孔位于骨折线的两端，其结构特点是：以骨折线为界，至少有位于一端的螺钉孔具有倾斜面，与所述具有倾斜面的螺钉孔配套的螺钉的头部具有吻合对接斜面，在具有倾斜面的螺钉孔及与之配套的螺钉的头部的连接处形成斜面连接结构。
本发明解决技术问题,还可以采取以下措施:
本发明的一种实施方案是：所述螺钉孔包括具有两种结构，一种结构具有倾斜面、位于骨折线的一端并构成具有倾斜面的螺钉孔，与所述具有倾斜面的螺钉孔配套的螺钉其头部具有吻对接斜面、构成带斜面螺钉；另一种结构是没有倾斜面、位于骨折线的另一端，与没有倾斜面配套的螺钉构成不带斜面螺钉。
本发明的一种实施方案是：所述倾斜面由呈长条状的条状孔形成，即位于骨折线一端的螺钉孔沿接骨板的长度方向的截面形状为长条状，该长条形螺钉孔至少位于远离骨折线一侧的内壁为斜面，与之相配合的螺钉头部与所述斜面接触的侧面为吻合对接的斜面。
本发明的一种实施方案是：所述倾斜面由呈截头倒锥状孔形成，与所述具有倾斜面螺钉孔配套的螺钉头部呈截头倒锥状，在截头倒锥状螺钉孔及与之配套的螺钉头部的连接处形成斜面连接结构。
本发明的一种实施方案是：在具有倾斜面的螺钉孔一端的接骨板段的下面设有与接骨板之间具有低摩擦系数的摩擦垫片；该摩擦垫片中设有与具有倾斜面的螺钉孔配合连通的通孔。
本发明的一种实施方案是：与具有倾斜面的螺钉孔配合的螺钉包括中空锥状螺钉套和头部位于锥形螺钉套中的螺钉。
本发明的一种实施方案是：所述截头倒锥状螺钉孔为通孔。
本发明具有如下突出效果：
1 、本发明所述的骨折断端加压微动接骨板，在接骨板安装时使骨折断端处的间隙尽量小，安装好后可进一步降低应力遮挡效应，有利于骨折断端间骨痂形成，促进骨愈合，有利于通过螺钉调节和控制骨折线两端的骨折远端或骨折近端之间的间隙大小，同时可有效预防或减少接骨板、螺钉断裂现象。
2 、本发明由于在螺钉孔中预留有'可微动距离'，因此，加压螺钉及骨折远端在向骨折近端'微动'过程中，不承受来自螺钉孔及螺钉孔周边的阻力；接骨板在加压螺钉有效固定骨折时，是由部分接骨板加压斜面和骨面直接受力，即使是在骨折远端与骨折近端之间的间隙较大的情况下，将骨板安装好后也可有效解决'微动'问题，从而起到加快骨折愈合的作用。
附图说明
图1是本发明的实施例1安装后的俯视图。
图2是本发明的实施例1安装过程示意图。
图3是本发明的实施例1安装后的截面示意图。
图4是本发明的实施例2的安装后的截面示意图。
图5是本发明的实施例3的安装后的截面示意图。
图中；1-接骨板，2-带斜面螺钉，3-螺钉孔，4-骨折远端，5-骨折线，6-不带斜面螺钉，7-骨折近端，8-螺钉头部，9-斜面连接结构，10-低摩擦系数垫片，11-锥形螺钉套，12-普通螺钉，F-远端受力，D1-旋紧螺钉过程中骨折远端向近端可移动的最大距离，D2-骨折断端被有效固定后，骨折远端受力时骨折远端向近端可移动的最大距离（即微动距离）。
具体实施方式
具体实施例1：
图1至图3构成本发明的具体实施例1。
参见图1、图2和图3，本实施例包括接骨板1和螺钉，在接骨板1中设有多个与螺钉配合连接的螺钉孔，所述螺钉孔位于骨折线5的两端，以骨折线5为界，至少有位于一端的螺钉孔3具有倾斜面，与所述具有倾斜面的螺钉孔3配套的螺钉的头部具有吻合对接斜面，在具有倾斜面的螺钉孔3及与之配套的螺钉的头部的连接处形成斜面连接结构9。所述螺钉孔包括具有两种结构，一种结构具有倾斜面、位于骨折线5的一端并构成具有倾斜面的螺钉孔3，与所述具有倾斜面的螺钉孔3配套的螺钉其螺钉头部8具有吻对接斜面、构成带斜面螺钉2；另一种结构是没有倾斜面、位于骨折线5的另一端，与没有倾斜面配套的螺钉构成不带斜面螺钉6。
其中，D1为旋转螺钉时骨折远端内移最大距离，D2为远端受力F时骨折远端内移最大距离。
本实施例中：
所述倾斜面由呈长条状的条状孔形成，即位于骨折线5一端的螺钉孔3沿接骨板1的长度方向的截面形状为长条状，该长条形螺钉孔至少有位于远离骨折线5一侧的内壁为斜面，与之相配合的螺钉为带斜面斜面的螺钉2、具有吻合对接的斜面。所述螺钉孔3为通孔。位于骨折线5另一端的螺钉孔为平头螺丝孔，该螺丝孔的上部位于接骨板内并且为平头凹窝状。
本发明采用'加压微动螺钉孔'设计，利用'斜面加压'固定骨折；'加压微动螺钉孔'内预留有'可微动距离'（这个距离的长度可长可短，最新研究结果，最佳长度是1-2mm）即：骨折断端被加压固定后，在外务或者内力作用下，骨折断端之间仍然可以产生'微动'；'微动'是通过接骨板的'无阻力设计'实现的确，即：（1）相对于传统接骨板，该接骨板螺钉孔设计预留有'可微动距离'：加压螺钉使接骨板受力后骨折远端4在向骨折近端7'微动'，在所述'微动'过程中，不会承受来自螺钉孔及螺钉孔周边的阻力；接骨板1在加压螺钉有效固定骨折时，是由部分接骨板加压斜面和骨面直接受力，而传统接骨板螺钉在有效固定骨折时，螺钉产生的压力，全部由接骨板承受，螺钉孔及周边限制了螺钉向骨折近段移动。
具体实施例2：
参见图4，本实施例2的特点是：在具有倾斜面的螺钉孔3一端的接骨板1段的下面设有与接骨板1之间具有低摩擦系数的摩擦垫片10；该摩擦垫片10中设有与具有倾斜面的螺钉孔3配合连通的通孔。
本实施例2的作用原理是：由于在具有倾斜面的螺钉孔3一端的接骨板1段的下面设有与接骨板1之间具有低摩擦系数的摩擦垫片10，因此，当位于接骨板1下面的骨头受到力的作用时，氘核低摩擦系数垫片10随骨折断端产生微动，此时接骨板1不动，能够克服因微动对骨折断端产生损伤。
具体实施例3：
参见图5，本实施例3的特点是：与具有倾斜面的螺钉孔3配合的螺钉2包括中空锥状螺钉套11和头部位于锥形螺钉套11中的普通螺钉12。
本实施例3中，由于与内壁为斜面的螺钉孔3配合的螺钉2包括中空的锥形螺钉套11和套于锥形螺钉套中的普通螺钉12，因此可以明显减少使用螺钉的阻力；更大的优点是，可以准备多种外径尺寸的锥形螺钉套备用，以消除在手术过程中因为钻孔距离误差等原因出现的安装困难及其它故障。螺钉孔3为通孔。而传统的接骨板中的螺丝孔全部为沉头螺孔。
具体实施例4：
本实施例4的特点是：所述倾斜面由呈截头倒锥状孔形成，与所述具有倾面螺钉孔3配套的螺钉头部呈截头倒锥状，在截头倒锥状螺钉孔3及与之配套的螺钉头部的连接处形成斜面连接结构9。在位于呈截头倒锥状螺钉孔3一端的接骨板1段的下面设有摩擦垫片10，该摩擦垫片10中设有与截头倒锥状螺钉孔3配合连通的截头状锥孔。其余同具体实施例1。
在本发明的其他实施例中：
形成倾斜面的长条状螺丝孔的长条状可以包括椭圆形、长方形或其它类似形状，但较好的方案是中间段矩形，两端为与螺钉外径圆弧一致的弧形。所述接骨板1及其螺钉孔与螺钉顶部接触面为光滑面，以减少摩擦系数，便于螺钉微动。
所述螺钉孔的形状可以各种各样，包括弧形、折弯形或长条形等，只要在受力时骨折远端或骨折近端的微动带动螺钉在螺钉孔中作同步微动者，偕属本发明所要求保护的范围。同时，接骨板可以采用各种可用于固定骨折的材料，包括金属和非金属。
当只有一端为微动端时，该端接骨板底面最好比另一端接骨板面凹入相当于低摩擦系数垫片厚度的深度，以便安装后接骨板下面的骨头受力均匀。

Claims (7)

1 、骨折断端加压微动接骨板，包括接骨板（1）和螺钉，在接骨板（1）中设有多个与螺钉配合连接的螺钉孔，所述螺钉孔位于骨折线（5）的两端，其特征是：以骨折线（5）为界，至少有位于一端的螺钉孔（3）具有倾斜面，与所述具有倾斜面的螺钉孔（3）配套的螺钉的头部具有吻合对接斜面，在具有倾斜面的螺钉孔（3）及与之配套的螺钉的头部的连接处形成斜面连接结构（9）。
2 、根据权利要求1所述的骨折断端加压微动接骨板，其特征是：所述螺钉孔包括具有两种结构，一种结构具有倾斜面、位于骨折线（5）的一端并构成具有倾斜面的螺钉孔（3），与所述具有倾斜面的螺钉孔（3）配套的螺钉其头部具有吻对接斜面、构成带斜面螺钉（2）；另一种结构是没有倾斜面、位于骨折线（5）的另一端，与没有倾斜面配套的螺钉构成不带斜面螺钉（6）。
3 、根据权利要求1或2所述的骨折断端加压微动接骨板，其特征是：所述具有倾斜面的螺钉孔（3）沿接骨板（1）的长度方向的截面形状为长条状，该截面形状为长条状的螺钉孔（3）至少有位于远离骨折线（5）一侧的内壁为倾斜面，与所述倾斜面相配合的螺钉（2）的头部具有吻合对接的斜面。
4 、根据权利要求1或2所述的骨折断端加压微动接骨板，其特征是：所述具有倾斜面的螺钉孔（3）呈截头倒锥状孔，与所述具有倾斜面螺钉孔（3）配套的螺钉的头部呈截头倒锥状，在截头倒锥状螺钉孔（3）及与之配套的螺钉头部的连接处形成斜面连接结构（9）。
5 、根据权利要求1或2所述的骨折断端加压微动接骨板，其特征是：在具有倾斜面的螺钉孔（3）一端的接骨板（1）段的下面设有与接骨板（1）之间具有低摩擦系数的摩擦垫片（10）；该摩擦垫片（10）中设有与具有倾斜面的螺钉孔（3）配合连通的通孔。
6 、根据权利要求1或2所述的骨折断端加压微动接骨板，其特征是：与具有倾斜面的螺钉孔（3）配合的螺钉（2）包括中空锥状螺钉套（11）和头部位于锥形螺钉套（11）中的螺钉（12）。
7 、根据权利要求1或2所述的骨折断端加压微动接骨板，其特征是：所述截头倒锥状螺钉孔（3）为通孔。
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CN109512499A (zh) * 2018-12-26 2019-03-26 新乡市中心医院 一种组合式可变应力接骨板
CN110522500A (zh) * 2019-09-23 2019-12-03 昆明医科大学第二附属医院 一种组合式下胫腓联合固定板
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