Dynamization device for promoting osteogenesis at osteotomy end, single-side lengthening frame, taylor six-axis external fixation frame

Abstract

The application relates to a device for promoting osteogenesis of bone cut ends, a single-side lengthening frame and a Taylor six-axis external fixation frame. The device comprises a first connecting part, a second connecting part, a micro-motion part and a driving assembly. The second connecting part is driven by the micro-motion part to make reciprocating motion along a linear path through the driving assembly, so that the second connecting part and the first connecting part make relative reciprocating motion, promoting osteogenesis of the first bone cut end and the second bone cut end, and the process has high repeatability. By controlling the working parameters of the driving assembly, the parameters of the reciprocating motion of the micro-motion part can be controlled, so that the power promotion process can be accurately controlled.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of medical devices, in particular to a dynamic device for promoting osteogenesis at the osteotomy end, a unilateral extension frame and a Taylor six-axis external fixation frame. BACKGROUND

[0002] Distraction osteogenesis surgical technology is widely used in the treatment of various complex deformities in maxillofacial surgery and orthopedics, such as limb length discrepancy, nonunion, congenital or acquired bone defects, bone infection or tumor-induced secondary bone loss, etc. Distraction osteogenesis technology first performs low-energy osteotomy on the target bone segment, then applies an external fixation device to fix the bone blocks at both ends of the osteotomy, and slowly pulls until the target length is reached. After that, the osteotomy end is fixed and osteogenesis is promoted to achieve the three-part treatment of osteotomy-end distraction (± deformity correction) - promotion of bone healing. The most advanced external fixation device currently recognized internationally is the Taylor six-axis external fixation frame and the unilateral extension frame based on the six-axis configuration. These two types of external fixation devices have different applications in limb sites and purposes, but they can basically cover all application scenarios of four-limb deformity correction. During the distraction osteogenesis process by applying an external fixation device, some patients may have delayed healing or nonunion at the osteotomy end, at which time different ways are used to promote bone healing.

[0003] Dynamic as an important way to promote osteogenesis at the osteotomy end is increasingly attracting the attention of doctors and researchers. As a technology embodying biomechanics, it mainly relies on changes in the biomechanical environment of the osteotomy end to affect signal transduction pathways at the tissue and cellular levels, change local biological expression, and ultimately promote osteogenesis.

[0004] Currently, whether in basic research such as animal experiments or in clinical treatment, dynamic is based on the deformation of the external fixation material itself or the whole device in the external fixation device, or the micro-motion between different components of the device, plus the external force generated by the mechanical activity of the limb or the weight of the limb, to produce relative displacement between the osteotomy ends, thereby ultimately achieving dynamic. Traditional dynamic operation has poor repeatability and cannot accurately control the dynamic process. SUMMARY

[0005] Therefore, it is necessary to provide a dynamic device for promoting osteogenesis at the osteotomy end with strong repeatability and capable of accurately controlling the dynamic process to solve the problems of poor repeatability and inability to accurately control the dynamic process of traditional dynamic operation.

[0006] The embodiments of the present application provide a dynamic device for promoting osteogenesis at the osteotomy end, which is used to cooperate with the fixation needle of the unilateral extension frame or the main body ring of the Taylor six-axis external fixation frame, and the dynamic device comprises:

[0007] The first connecting part is used for fixed connection with the fixing needle of the single-side extension frame or the main ring of the Taylor six-axis external fixation frame.

[0008] The second connecting part is used for fixed connection with the fixing needle of the single-side extension frame or the main ring of the Taylor six-axis external fixation frame.

[0009] The micro-motion part is fixedly connected with the first connecting part or the second connecting part; and

[0010] The driving assembly is used to drive the micro-motion part to drive the first connecting part or the second connecting part to make reciprocating motion along a linear path, so that the first connecting part and the second connecting part make relative reciprocating motion along the linear path.

[0011] The above-mentioned power device for promoting osteogenesis of bone cutting ends drives the micro-motion part to drive the second connecting part to make reciprocating motion along a linear path through the driving assembly, so that the second connecting part and the first connecting part make relative reciprocating motion, promote the osteogenesis of the first bone cutting end and the second bone cutting end, and the process has strong repeatability. By controlling the working parameters of the driving assembly, the parameters of the reciprocating motion of the micro-motion part can be controlled, so that the power process can be accurately controlled.

[0012] In an embodiment, the power device further comprises a control part for controlling the working parameters of the driving assembly.

[0013] In an embodiment, a plurality of needle holes are respectively arranged on the first connecting part and the second connecting part, and the needle holes are adapted to the fixing needle.

[0014] In an embodiment, the power device further comprises a third connecting part, the first connecting part is fixedly connected with the third connecting part, the relative angle of the third connecting part and the first connecting part is adjustable, and the third connecting part is used for fixed connection with the main ring of the Taylor six-axis external fixation frame; and / or,

[0015] The power device further comprises a fourth connecting part, the second connecting part is fixedly connected with the fourth connecting part, the relative angle of the fourth connecting part and the second connecting part is adjustable, and the fourth connecting part is used for fixed connection with the main ring of the Taylor six-axis external fixation frame.

[0016] In an embodiment, the third connecting part is a clamping jaw; and / or, the fourth connecting part is a clamping jaw.

[0017] In an embodiment, the first connecting part and the third connecting part are connected through a double-head universal joint; and / or, the second connecting part and the fourth connecting part are connected through a double-head universal joint; wherein, the double-head universal joint comprises a first universal joint and a second universal joint fixedly connected with the first universal joint in an extendable manner.

[0018] In an embodiment, the driving assembly further comprises:

[0019] a rotating part, which drives the micro-motion part to move when rotating;

[0020] a power part, which provides power for the rotating part to rotate; and

[0021] a limiting part, which is fixedly connected with the first connecting part or the second connecting part, and limits the movement path of the micro-motion part to be a straight path when the rotating part drives the micro-motion part to move.

[0022] In an embodiment, the outer wall of the rotating part is provided with a spiral groove;

[0023] the power device further comprises a sliding part, which is located in the groove and is fixedly connected with the micro-motion part;

[0024] the side wall of the groove extrudes the sliding part when the rotating part rotates, so that the sliding part drives the micro-motion part to move.

[0025] In an embodiment, the limiting part has a track, the cross-sectional shape of the track is non-circular, and the micro-motion part moves in the track and is adapted to the track.

[0026] In an embodiment, the power device further comprises a display module, the control part is used to obtain the parameters of the linear reciprocating motion of the micro-motion part according to the working parameters of the driving mechanism, and send the parameters of the linear reciprocating motion of the micro-motion part to the display module, and the display module is used to display the parameters of the linear reciprocating motion of the micro-motion part.

[0027] In an embodiment, the driving assembly comprises a crank slider mechanism or a cam transmission mechanism, which drives the micro-motion part to move.

[0028] Another embodiment of the present application further provides a single-side extension frame, which comprises the power device according to any one of the above embodiments and a plurality of fixing needles, the first connecting part is fixedly connected with the fixing needles, and the second connecting part is connected with the fixing needles.

[0029] Still another embodiment of the present application further provides a Taylor six-axis external fixation frame, which comprises the power device according to any one of the above embodiments and a main body ring, the main body ring comprises a first main body ring connected with the first connecting part and a second main body ring connected with the second connecting part. BRIEF DESCRIPTION OF DRAWINGS

[0030] Figure 1 Structure diagram of the power device of the first embodiment matched with the fixed needle;

[0031] Figure 2 Structure diagram of the power device of the second embodiment matched with the main ring. DETAILED DESCRIPTION

[0032] For the purpose of promoting an understanding of the principles of the application, reference will now be made to the embodiments illustrated in the drawings. It is expressly understood that the drawings are only meant to illustrate preferred embodiments of the application and that the application can take many different forms. In addition, it should be understood that the drawings are not to scale, and that the specific dimensions shown are intended to be illustrative only and that in no way limit the scope of the application.

[0033] It should be noted that when a part is referred to as being "connected" to another part, it can be directly connected to the other part or intervening parts can be present. When a part is referred to as being "connected" to another part, it can be directly connected to the other part or intervening parts can be present. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are used for illustrative purposes only and are not intended to be limiting.

[0034] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description of the application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.

[0035] Reference will now be made to Figure 1 The first embodiment of the present application provides a power device 100 for promoting the osteogenesis of the osteotomy ends. The power device 100 comprises a first connecting part 110, a second connecting part 120, a micro-motion part 130, a control part (not shown) and a driving assembly (not shown).

[0036] After the target bone segment is subjected to low-energy osteotomy using the distraction osteogenesis technique, a first bone block 11 and a second bone block 12 are formed. The end of the first bone block 11 that is broken towards the second bone block 12 is the first osteotomy end, and the end of the second bone block 12 that is broken towards the first bone block 11 is the second osteotomy end. During the stage of promoting the osteogenesis of the two osteotomy ends, the two bone blocks are fixed with the fixed needles 20 of the single-sided extension frame (not shown). Specifically, in the present embodiment, the first bone block 11 is fixed with three fixed needles 20, and the second bone block 12 is fixed with three fixed needles 20.

[0037] The first connecting part 110 is fixedly connected with the fixing needle 20 fixed to the first bone block 11. The second connecting part 120 is fixedly connected with the fixing needle 20 fixed to the second bone block 12.

[0038] Specifically, a plurality of needle holes (not shown) are arranged on the first connecting part 110 and the second connecting part 120 respectively, which are matched with the fixing needle 20. In the embodiment, the first connecting part 110 is provided with three needle holes, which are matched with the three fixing needles 20 fixed to the first osteotomy end, so as to fix the first connecting part 110 with the first bone block 11. The second connecting part 120 is provided with three needle holes, which are matched with the three fixing needles 20 fixed to the second bone block 12, so as to fix the second connecting part 120 with the second bone block 12.

[0039] In the embodiment, the micro-motion part 130 is fixedly connected with the second connecting part 120. The control part controls the driving assembly to drive the micro-motion part 130 to move, so that the micro-motion part 130 drives the second connecting part 120 to move along the linear path reciprocatingly, so that the second connecting part 120 and the first connecting part 110 move along the linear path reciprocatingly, and then the first osteotomy end and the second osteotomy end move along the linear path reciprocatingly, so as to realize the dynamization process. In the dynamization process, the first osteotomy end and the second osteotomy end generate relative displacement, which changes the biomechanical environment of the first osteotomy end and the second osteotomy end, affects the signal transduction pathway at the tissue and cell level, changes the local biological expression, and finally promotes the osteogenesis of the first osteotomy end and the second osteotomy end.

[0040] Specifically, the control part can be a button, a controller, etc. The control part can control the working parameters of the driving assembly, such as the operation time and operation speed of the driving assembly. By controlling the working parameters of the driving assembly through the control part, the parameters of the linear reciprocating motion of the micro-motion part 130 can be controlled, so that the dynamization process can be accurately controlled. For example, by controlling the working time and operation speed of the driving assembly through the control part, the time and frequency of the linear reciprocating motion of the micro-motion part 130 can be controlled, so that the time and frequency of the dynamization can be accurately controlled.

[0041] The above-mentioned dynamization device 100 for promoting the osteogenesis of the osteotomy end drives the micro-motion part 130 to drive the second connecting part 120 to move along the linear path reciprocatingly through the driving assembly, so that the second connecting part 120 and the first connecting part 110 move reciprocatingly, and promotes the osteogenesis of the first osteotomy end and the second osteotomy end, and the process has strong repeatability. By controlling the working parameters of the driving assembly, the parameters of the reciprocating motion of the micro-motion part 130 can be controlled, so that the dynamization process can be accurately controlled.

[0042] In an embodiment, the driving assembly further comprises a power unit 141, a rotating unit 142, and a limiting unit 143. The power unit 141 is configured to provide power for the rotating unit 142 to rotate, so that the rotating unit 142 drives the micro-moving unit 130 to move. The limiting unit 143 limits the moving path of the micro-moving unit 130 to be a straight path. The limiting unit 143 is fixedly connected with the first connecting unit 110.

[0043] Specifically, the power unit 141 can be an electric motor. The limiting unit 143 has a track. When the electric motor drives the rotating unit 142 to rotate, the rotating unit 142 drives the micro-moving unit 130 to move in the track of the limiting unit 143. The cross section of the track is non-circular, and the micro-moving unit 130 is adapted to the track, so that the micro-moving unit 130 moves in a straight path in the track. The cross section of the track can be square or irregular, etc. Since the limiting unit 143 is connected with the first connecting unit 110, the micro-moving unit 130 is fixedly connected with the second connecting unit 120, so that when the micro-moving unit 130 moves in a straight reciprocating motion in the track of the limiting unit 143, the second connecting unit 120 moves along a straight path relative to the first connecting unit 110.

[0044] In other embodiments, the micro-moving unit 130 can be fixedly connected with the first connecting unit 110, and the limiting unit 143 can be fixedly connected with the second connecting unit 120, so that the first connecting unit 110 and the second connecting unit 120 can also move along a straight path relative to each other.

[0045] In an embodiment, the driving assembly further comprises a sliding unit 144, which is fixedly connected with the micro-moving unit 130. The outer wall of the rotating unit 142 is provided with a groove 101 winding along a spiral, and the sliding unit 144 is located in the groove 101. When the rotating unit 142 rotates, the side wall of the groove 101 presses the sliding unit 144, so that the sliding unit 144 drives the micro-moving unit 130 to move.

[0046] Specifically, the sliding unit 144 is a sliding block. The sliding block is located in the groove 101. When the rotating unit 142 rotates, the side wall of the groove 101 presses the sliding block, so that the sliding block moves. Since the sliding block is fixedly connected with the micro-moving unit 130, and the limiting unit 143 limits the moving path of the micro-moving unit 130 to be a straight path, the sliding block drives the micro-moving unit 130 to move along a straight path in a reciprocating manner.

[0047] In other embodiments, the micro-moving unit 130 can also be driven by a crank slider mechanism or a cam transmission mechanism to move in a straight reciprocating manner.

[0048] In an embodiment, the power device 100 further comprises a power supply 150. The power supply 150 can be a battery or the like. The power supply 150 can supply power to the power unit 141.

[0049] In an embodiment, the powerization device 100 further comprises a display module 160 connected with the control unit. The control unit is configured to obtain parameters of the linear reciprocating motion of the micro-motion unit 130 according to the working parameters of the driving assembly, and send the parameters of the linear reciprocating motion of the micro-motion unit 130 to the display module 160. The display module 160 is configured to display the parameters of the linear reciprocating motion of the micro-motion unit 130.

[0050] Specifically, the display module 160 can be a display screen. The working parameters of the driving assembly are, for example, working time, running speed, etc. The parameters of the linear reciprocating motion of the micro-motion unit 130 are, for example, motion time, frequency, etc. The motion time of the micro-motion unit 130 can be obtained according to the working time of the driving assembly. The frequency of the linear reciprocating motion of the micro-motion unit 130 can be calculated according to the running speed of the driving assembly. The control unit sends the working parameters such as the time and frequency of the linear reciprocating motion of the micro-motion unit 130 to the display module 160. The display module 160 displays the working parameters such as the time and frequency of the linear reciprocating motion of the micro-motion unit 130, so that the user can conveniently and intuitively see the parameters such as the time and frequency of the linear reciprocating motion of the micro-motion unit 130, and adjust the parameters of the linear reciprocating motion of the micro-motion unit 130 in real time according to the bone formation of the osteotomy end, thereby facilitating real-time and accurate control of the powerization process.

[0051] In an embodiment, the powerization device 100 further comprises a wireless communication module (not shown). The wireless communication module is connected with the control unit. The control unit can realize wireless connection with a mobile terminal through the wireless communication module, so that the powerization process of the powerization device 100 can be remotely controlled through the mobile terminal. The wireless communication module can be a wifi module, a Bluetooth module, etc. The mobile terminal can be a mobile phone, a computer, a tablet computer, etc.

[0052] Another embodiment of the present application also provides a single-side extension frame (not shown). The single-side extension frame comprises the powerization device 100 of any one of the above-mentioned embodiments and a plurality of fixation pins 20. The first connecting part 110 and the second connecting part 120 are respectively fixed with the fixation pins 20. The first connecting part 110 is fixed with the first bone block 11 through the fixation pins 20. The second connecting part 120 is fixed with the second bone block 12 through the fixation pins 20.

[0053] Please refer to Figure 2 The second embodiment of the present application provides a powerization device 200 for promoting bone formation of an osteotomy end. The structure of the powerization device 200 of the second embodiment is basically the same as that of the powerization device 100 of the first embodiment, and will not be described here. The differences between the powerization device 200 of the second embodiment and the powerization device 100 of the first embodiment will be mainly introduced below.

[0054] The power device 200 is used in cooperation with the main rings of a Taylor six-axis external fixator. The Taylor six-axis external fixator has a first main ring 31 and a second main ring 32. In the stage of promoting the osteogenesis of the two osteotomy ends, the two bone blocks are fixed with the first main ring 31 and the second main ring 32 respectively. Specifically, in the embodiment, the first bone block is fixed with the first main ring 31, and the second bone block is fixed with the second main ring 32.

[0055] In the embodiment, the first connecting part is fixedly connected with the first main ring 31 fixed to the first bone block. The second connecting part is fixedly connected with the second main ring 32 fixed to the second bone block. The control part controls the driving assembly to drive the micro-motion part to move, so that the micro-motion part drives the second connecting part to make reciprocating motion along a linear path, and thus the second connecting part and the first connecting part make relative reciprocating motion along the linear path, and further the first main ring 31 drives the first bone block and the second main ring 32 drives the second bone block, so that the first osteotomy end and the second osteotomy end make relative reciprocating motion along the linear path, and promote the osteogenesis of the first osteotomy end and the second osteotomy end. The process has strong repeatability. By controlling the working parameters of the driving assembly through the control part, the parameters of the reciprocating motion of the micro-motion part can be controlled, and thus the power process can be accurately controlled.

[0056] In an embodiment, the power device 200 further comprises a third connecting part 270. The first connecting part is fixedly connected with the third connecting part 270. Specifically, the first connecting part is fixedly connected with the third connecting part 270, and the third connecting part 270 is fixedly connected with the first main ring 31, so that the first connecting part can be fixedly connected with the first main ring 31 through the third connecting part 270. The third connecting part 270 can be a clamping jaw, which can clamp the first main ring 31 to be fixed with the first main ring 31.

[0057] In the process of using the distraction osteogenesis technique to distract and correct the deformity of the two osteotomy ends, lateral displacement may occur between the first main ring 31 and the second main ring 32. The lateral displacement between the first main ring 31 and the second main ring 32 is different for different Taylor six-axis external fixators. Since the second connecting part is fixed with the second main ring 32, when the first main ring 31 and the second main ring 32 produce lateral displacement, if the third connecting part 270 does not move, the third connecting part 270 will be difficult or unable to connect with the first main ring 31.

[0058] In the embodiment, the relative angle between the first connecting part and the third connecting part 270 is adjustable, so that the position of the end of the third connecting part 270 can be changed by adjusting the relative angle between the third connecting part 270 and the first connecting part, and thus the third connecting part 270 can be connected to the first main ring 31.

[0059] In an embodiment, the first connecting part and the third connecting part 270 are connected by a double-joint universal joint. The double-joint universal joint comprises a first universal joint 291 and a second universal joint 292. The first universal joint 291 and the second universal joint 292 are fixedly connected in an extendable manner.

[0060] Specifically, the first universal joint 291 is connected with the third connecting part 270, and the second universal joint 292 is connected with the first connecting part, so that the first connecting part and the third connecting part 270 are connected, and the relative angle between the third connecting part 270 and the first connecting part can be adjusted through the first universal joint 291 and / or the second universal joint 292.

[0061] Specifically, the end of the first universal joint 291 has a connecting rod 293, and the end of the second universal joint 292 has a connecting sleeve 294. The connecting rod 293 can be inserted into the connecting sleeve 294 and adjusted in an extendable manner with the connecting sleeve 294, so that the length between the two ends of the double-joint universal joint can be adjusted, thereby the distance between the third connecting part 270 and the first connecting part can be adjusted, and the power device can be adapted to the change of the distance between the first main body ring 31 and the second main body ring 32.

[0062] In other embodiments, the power device 200 further comprises a first threaded connecting part. The first connecting part and the third connecting part 270 can also be fixedly connected by the first threaded connecting part. When the relative angle between the third connecting part 270 and the first connecting part needs to be adjusted, the first threaded connecting part can be loosened, and after the relative angle between the third connecting part 270 and the first connecting part is adjusted, the first threaded connecting part can be tightened.

[0063] In an embodiment, the third connecting part 270 is provided with a protrusion (not shown). The first main body ring 31 is provided with a positioning hole (not shown). The protrusion on the third connecting part 270 is adapted to the positioning hole on the first main body ring 31. When the protrusion on the third connecting part 270 is located in the positioning hole on the first main body ring 31, the relative position of the third connecting part 270 and the first main body ring 31 can be determined, which plays a positioning role, so that when the third connecting part 270 clamps the first main body ring 31, the third connecting part 270 and the first main body ring 31 will not produce relative deviation.

[0064] In an embodiment, the number of protrusions on the third connecting part 270 is multiple, for example, two, three, four, etc. When the relative angle of the third connecting part 270 changes, the position of the protrusion on the third connecting part 270 changes, so that when the relative angle of the third connecting part 270 is different, different protrusions can be matched with the positioning hole.

[0065] In an embodiment, the power device 200 further comprises a fourth connecting part 280. The second connecting part is fixedly connected with the fourth connecting part 280. Specifically, the second connecting part is fixedly connected with the fourth connecting part 280, and the fourth connecting part 280 is fixedly connected with the second main body ring 32, so that the second connecting part can be fixedly connected with the second main body ring 32 through the fourth connecting part 280. The fourth connecting part 280 can be a clamping jaw, through which the second main body ring 32 can be clamped to be fixed with the second main body ring 32.

[0066] In the process of stretching and deformity correction of the two osteotomy ends by the distraction osteogenesis technology, the second main body ring 32 and the first main body ring 31 can be laterally displaced. The lateral displacement between the second main body ring 32 and the first main body ring 31 is different for different Taylor six-axis external fixators. Since the first connecting part is fixed with the first main body ring 31, when the second main body ring 32 and the first main body ring 31 are laterally displaced, if the fourth connecting part 280 does not move, the fourth connecting part 280 will be difficult or unable to be connected with the second main body ring 32.

[0067] In the present embodiment, the relative angle between the second connecting part and the fourth connecting part 280 is adjustable, so that the position of the end of the fourth connecting part 280 can be changed by adjusting the relative angle between the fourth connecting part 280 and the second connecting part, and thus the fourth connecting part 280 can be connected to the second main body ring 32.

[0068] In an embodiment, the second connecting part and the fourth connecting part 280 are connected through a double-head universal joint. The double-head universal joint comprises a first universal joint 291 and a second universal joint 292. The first universal joint 291 and the second universal joint 292 are fixedly connected in an extendable manner.

[0069] Specifically, the first universal joint 291 is connected with the fourth connecting part 280, and the second universal joint 292 is connected with the second connecting part, so that the second connecting part is connected with the fourth connecting part 280, and the relative angle between the fourth connecting part 280 and the second connecting part can be adjusted through the first universal joint 291 and / or the second universal joint 292.

[0070] Specifically, the end of the first universal joint 291 has a connecting rod 293, and the end of the second universal joint 292 has a connecting sleeve 294. The connecting rod 293 can be inserted into the connecting sleeve 294 and adjusted in an extendable manner, so that the length between the two ends of the double-head universal joint can be adjusted, the distance between the second connecting part and the fourth connecting part 280 can be adjusted, and thus the power device 200 can be applicable to the change of the distance between the first main body ring 31 and the second main body ring 32.

[0071] In other embodiments, the power device 200 further comprises a second threaded connection. The second connection portion and the fourth connection portion 280 are fixedly connected through the second threaded connection. When the relative angle between the fourth connection portion 280 and the second connection portion needs to be adjusted, the second threaded connection can be loosened, and after the relative angle between the fourth connection portion 280 and the second connection portion is adjusted, the second threaded connection is tightened.

[0072] In an embodiment, the fourth connection portion 280 is provided with a protrusion (not shown). The second main body ring 32 is provided with a positioning hole (not shown). The protrusion on the fourth connection portion 280 is adapted to the positioning hole on the second main body ring 32. When the protrusion on the fourth connection portion 280 is located in the positioning hole on the second main body ring 32, the relative position of the fourth connection portion 280 and the second main body ring 32 can be determined, thereby playing a positioning role, so that when the fourth connection portion 280 clamps the second main body ring 32, the fourth connection portion 280 and the second main body ring 32 will not be relatively offset.

[0073] In an embodiment, the number of protrusions on the fourth connection portion 280 is multiple, for example, two, three, four, etc. When the relative angle of the fourth connection portion 280 changes, the position of the protrusion on the fourth connection portion 280 changes, so that when the relative angle of the fourth connection portion 280 is different, different protrusions can be matched with the positioning hole.

[0074] Another embodiment of the present application also provides a Taylor six-axis external fixation frame (not shown). The Taylor six-axis external fixation frame comprises the power device 200 of any of the above embodiments and a main body ring, and the main body ring comprises a first main body ring 31 connected with the first connection portion and a second main body ring 32 connected with the second connection portion. The first connection portion is fixed with the first bone block through the first main body ring 31. The second connection portion is fixed with the second bone block through the second main body ring 32.

[0075] The technical features of the above embodiments can be combined in any way. In order to make the description simple, all possible combinations of the technical features in the above embodiments are not described, but as long as the combinations of the technical features do not exist contradictory, they should be considered as the scope of the present application.

[0076] The above embodiments only express several embodiments of the present application, and the description is more specific and detailed, but it cannot be understood as a limitation on the scope of the present application. It should be pointed out that for ordinary skilled in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which are within the scope of the present application. Therefore, the protection scope of the present application should be subject to the appended claims.

Claims

1. A dynamization device for promoting osteogenesis at the osteotomy end for cooperation with a fixation pin of a unilateral lengthening frame or a body ring of a Taylor six-axis external fixation frame, characterized in that, The power device comprises: a first connecting part for fixed connection with the fixing needle of the single-side extension frame or the main ring of the Taylor six-axis external fixation frame; a second connecting part for fixed connection with the fixing needle of the single-side extension frame or the main ring of the Taylor six-axis external fixation frame; a micro-motion part fixedly connected with the first connecting part or the second connecting part; and a driving assembly for driving the micro-motion part to drive the first connecting part or the second connecting part to make reciprocating motion along a straight line path, so that the first connecting part and the second connecting part make relative reciprocating motion along a straight line path; a third connecting part for fixed connection with the first main ring of the Taylor six-axis external fixation frame, the first connecting part being connected with the third connecting part through a double-end universal joint, the double-end universal joint comprising a first universal joint and a second universal joint, the first universal joint and the second universal joint being fixedly connected in an extendable manner; and a fourth connecting part for fixed connection with the second main ring of the Taylor six-axis external fixation frame, the second connecting part being also connected with the fourth connecting part through the double-end universal joint; The driving assembly further comprises: a rotating part for driving the micro-motion part to move when rotating; a power part for providing power for the rotation of the rotating part; and a limiting part fixedly connected with the first connecting part or the second connecting part, the limiting part limiting the movement path of the micro-motion part to be a straight line path when the rotating part drives the micro-motion part to move; the outer wall of the rotating part is provided with a spiral groove; the power device further comprises a sliding part located in the groove, the sliding part being fixedly connected with the micro-motion part; when the rotating part rotates, the side wall of the groove extrudes the sliding part, so that the sliding part drives the micro-motion part to move; a control part is further included for controlling the working parameters of the driving assembly; a display module is further included, and the control part is used to obtain the parameters of the linear reciprocating motion of the micro-motion part according to the working parameters of the driving assembly, and send the parameters of the linear reciprocating motion of the micro-motion part to the display module, the display module being used to display the parameters of the linear reciprocating motion of the micro-motion part; the relative angle between the third connecting part and the first connecting part is adjustable; and / or, the relative angle between the fourth connecting part and the second connecting part is adjustable; the third connecting part is a clamping jaw; and / or, the fourth connecting part is a clamping jaw; the limiting part has a track, the shape of the cross section of the track being non-circular, the micro-motion part moving in the track and being adapted to the track.

2. The power-assisted device of claim 1, wherein, a plurality of pin holes are respectively provided on the first connecting part and the second connecting part, the pin holes being adapted to the fixing needle.

3. A single-sided extension shelf characterized by, The power device comprises: a plurality of fixing needles, the first connecting part being fixedly connected with the fixing needles, and the second connecting part being connected with the fixing needles.

4. A Taylor six-axis external fixator, characterized by, The power-assisted device as claimed in claim 1, and a main body ring including a first main body ring connected to the first connecting portion and a second main body ring connected to the second connecting portion.

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