55 results about "LONG BONE FRACTURE" patented technology

The invention discloses an online compensation method for reset pose errors of a long bone fracture surgical robot. The online compensation method comprises the steps that a target pose matrix # imgabs0 # is obtained through preoperative path planning, # imgabs1 # and # imgabs2 # are obtained through robot calibration, and the joint position theta temp is obtained through a robot inverse kinematics numerical method; s3, inputting the theta temp obtained in the step S3 into a robot controller, and enabling the robot to move to a theoretical target pose; measuring a current pose # imgabs3 # after the movement of S4 through an optical positioning system; calculating an error differential operator delta T between the obtained current pose # imgabs4 # and the target pose matrix # imgabs5 #; calculating an error motion vector delta d according to the obtained delta T; adopting the delta d to judge whether the delta d2 is smaller than a threshold value epsilon or not; if yes, compensation is stopped; if not, entering the next step; and according to the initial target pose # imgabs6 # and the error motion vector delta d, calculating a stage target pose # imgabs7 #, and according to the stage target pose # imgabs8 #, obtaining new # imgabs9 # and # imgabs10 #, and repeatedly iterating the S2-S8.

The invention discloses an intramedullary nail system for long bone fracture treatment, which belongs to the field of medical instruments and comprises a rod-shaped main body, a limiting assembly, a transmission assembly and a bone plate, the rod-shaped main body is provided with an implanting section and a connecting section which are connected with each other, a first cavity is formed in the implanting section, a second cavity is formed in the connecting section, the first cavity is communicated with the second cavity, and a through hole is formed in the wall of the implanting section; the limiting assembly is provided with a mounting part, a rotating shaft and rotating blades; the rotating shaft is arranged in the first cavity; one end of the rotating blade is arranged on the rotating shaft, and the other end is movably arranged in the through hole or extends out of the through hole; the transmission assembly is arranged in the second cavity and is in transmission connection with the rotating shaft; the bone plate is fixedly connected with the connecting section, and a plurality of channels for bone screws to pass through are formed in the bone plate. When the screw-out angles are the same, the extending radial lengths of different rotating blades can be different due to different acting forces between the rotating blades and the marrow cavity wall so as to better adapt to the irregular marrow cavity wall.

This invention discloses a long bone fracture robot, relating to the field of medical robot technology. The robot includes an upper fixation ring, a lower fixation ring, and six sets of sliding components connected between them. These six sets of sliding components are spatially distributed and form a parallel mechanism. Each sliding component includes a lead screw assembly and a drive assembly. The lead screw assembly includes a lead screw and at least one U-shaped joint, with the U-shaped joint connecting the end of the lead screw to the corresponding fixation ring. The two rotation axes of the U-shaped joint maintain a non-compatibility distribution structure with a preset distance in space to increase the joint's swing angle range and improve multi-directional load-bearing capacity. The drive assembly converts the rotational motion of the motor into the linear motion of the lead screw through gear transmission, realizing the extension and retraction of the sliding components. This invention can avoid unusual configurations within a larger workspace, providing safer, more precise, and more efficient assistance in fracture reduction surgery.

The application provides a controllable self-expanding intramedullary nail internal fixation system for long bone fracture, belonging to the technical field of orthopedic medical instruments, and comprising a self-expanding intramedullary nail, a visible controllable self-expanding platform and a locking nail; the self-expanding intramedullary nail comprises a locking hole and an expandable support; the locking hole is arranged at the proximal end of the self-expanding intramedullary nail and is matched with the locking nail to fix the proximal end of the self-expanding intramedullary nail; the expandable support is arranged at the distal end of the self-expanding intramedullary nail after expansion to fix the distal end of the self-expanding intramedullary nail. The visible controllable self-expanding platform is in communication with the expandable support and can display the expansion size, and the self-expanding intramedullary nail can be prevented from being expanded too large to affect the medullary cavity by precalculating the expansion size.

This utility model relates to the field of orthopedic medical device technology, specifically to an adjustable drilled plate integrated fixation clamp for long bone fractures. It includes a first clamp body and a second clamp body, which are cross-hinged. The top of the first clamp body has a first clamping part, and the inner surface of the first clamping part has several short pins. The top of the second clamp body has a second clamping part, which includes a fixing plate and a clamping block. The clamping block is slidably connected to the inner side of the fixing plate, and the fixing plate has several through holes. This utility model not only provides stable clamping but also features fracture reduction and fixation, adaptive clamping of multiple types of plates, and drilled screw implantation.

The invention provides an internal fixation device for long bone fracture, and belongs to the technical field of intramedullary fixation. Comprising an integral assembly, and the integral assembly comprises a connecting cylinder. A first circular shaft is pressed to descend, so that a first fixing clamping shaft and a second fixing clamping shaft are shrunk into a connecting cylinder, then the connecting cylinder is inserted into a bone needing to be connected, the broken bone can be effectively and preliminarily fixed through the connecting cylinder, and the first circular shaft is loosened; a first fixing clamping shaft and a second fixing clamping shaft are unfolded under the counter-acting force of a spring, and a first movable circular plate and a second movable circular plate are driven to ascend through a rotating shaft, so that the first fixing clamping shaft and the second fixing clamping shaft can be embedded into holes reserved in bones, and the fixing effect between the fractured bones is further enhanced; and through movement of the second circular shaft, two fractured bones can be effectively attached, meanwhile, the connecting effect of the fractured position is effectively enhanced, and the healing speed after fracture is increased.

To provide a plate to treat a long bone fracture located near an existing prosthesis that is at the distal or proximal femur.SOLUTION: A periprosthetic plate and a method of use are disclosed, the periprosthetic plate comprising a proximal segment having a top portion and an end portion with at least two curved hooks that are capable of passing through a patient's abductor muscles and rest medially on a tip of a patient's greater trochanter (GT), where the proximal segment includes a plurality of recessed bone screw holes. A periprosthetic proximal femur plate is disclosed that includes a head portion having at least six first polyaxial screw holes and a shaft portion connected to the shaft portion having a plurality of rows of at least two second polyaxial screw holes located at an angle of about 30° to about 60° from the horizontal. A combination periprosthetic proximal femur plate and greater trochanter (GT) plate construct is disclosed that includes a greater trochanter (GT) plate located on top of the periprosthetic proximal femur plate.SELECTED DRAWING: Figure 1

The invention discloses a novel extensible long intramedullary rod and a matched tool, and relates to the technical field of medical instruments, the novel extensible long intramedullary rod comprises a female rod and a male rod, one end of the female rod is provided with a fixed tip, the other end of the female rod is provided with a blind hole, the male rod is sleeved with the blind hole, the fixed tip is used for being connected with the epiphysis of the far end of a long bone, and the end of the male rod is flush with an implantation opening. And the length of the male rod sleeved into the female rod is at least 1 / 2 of the length of the female rod. The extensible long intramedullary rod can effectively fix a long bone, prevent fracture of the long bone and maintain the shape of the long bone, can gradually achieve the purpose of extension along with the growth of the bone, can better maintain the mechanical axis of the bone, has a stronger protection effect on the fracture end, is particularly suitable for being applied to special patients in the department of orthopedics of children, and has a wide application prospect. And intraoperative and postoperative protection of lower limb long bone malformation and fracture caused by osteogenesis insufficiency and congenital long bone artificial joints can be realized.

The invention discloses a special distraction device suitable for precise closed reduction of long bone fracture of children, and relates to the field of fracture reduction, the special distraction device comprises distraction adjusting mechanisms and an image analysis unit.The distraction adjusting mechanisms comprise connecting plates, spiral magnet rings, magnetorheological fluid and clamping rods, and the distraction adjusting mechanisms are used for the two ends of the fracture position of a patient; the rotation posture of the clamping rod is adjusted according to more than two adjustment strategies to conduct closed reduction on the two ends of the fracture position, and whether the spiral magnet ring is powered on or not is selected in the closed reduction process so as to switch the flowing or curing state of magnetorheological fluid, and whether the placement posture of a closing needle arranged on the clamping rod is instantly fixed or not is selected; compared with a traditional single-shaft traction device, composite correction of a sagittal plane, a coronal plane and rotation can be completed, a magneto-rheological locking system composed of a fixing pin, a spiral magnet ring and magneto-rheological fluid can be automatically locked after being adjusted in place, over-traction injury is avoided, and a user is helped to rapidly fix a reset broken bone in an operation.

The invention discloses a navigation reduction and reduction maintenance device for long bone fractures, which comprises two reference frames, and the position changes of two broken bones are tracked by a navigation system; two operating structures of the reference frames are provided, and the operating reference frames and the operating structures do not undergo relative position changes, and the reference frames are provided with insertion parts, and the two insertion parts are respectively inserted into the two broken bones; a reduction and maintenance structure is also provided, which comprises a connecting rod, an adjustment locking ring and an adjustment locking structure respectively provided on the two operating structures, the connecting rod extends into the two adjustment locking rings, and the adjustment locking rings and the connecting rod are respectively controlled to switch between a non-locked state and a locked state through the two adjustment locking structures; the operating part is controlled to drive the broken bone to undergo reduction movement, and the navigation system tracks the reference frame to observe whether the broken bone is reduced on a display structure; after reduction, the adjustment locking structure locks the position relationship between the adjustment locking ring and the connecting rod, and after the positions of the two ends of the connecting rod are locked, the positions of the connecting rod and the operating part are locked.

The invention discloses a composite therapeutic apparatus for synchronously treating closed fracture and complications thereof, and relates to the field of therapeutic apparatuses, the composite therapeutic apparatus comprises an upper layer main shell, a lower layer main shell and a bottom shell, the bottom shell is internally provided with an automatic locking unit for rapidly locking the upper layer main shell and the lower layer main shell; a pressing unit; the treatment structure is electrically connected with the control mainboard; the intermediate-frequency treatment unit and the LIPUS treatment unit are integrated on one device, the purpose of simultaneously treating the fracture affected part by jointly using LIPUS and intermediate-frequency electrical stimulation is achieved, meanwhile, the functions of easing pain, eliminating inflammation and promoting tissue and cell regeneration of the affected part are achieved, and the application of the patent product is not limited to fracture injuries, but also limited to bone fracture injuries. The device can also be applied to treatment of closed skeletal muscle movement system soft tissue injury, is small in size and flexible in deployment, has good sanitary conditions and reusability, and can provide good treatment capacity for long bone fracture patients in a bandaging and fixing state.

The utility model discloses an anti-rotation instrument for a long bone fracture reduction nail, the reduction nail comprises an insertion part and an operation holding part, the anti-rotation instrument comprises an anti-rotation structure, the anti-rotation structure is arranged between the insertion part and the operation holding part, and the anti-rotation structure comprises at least one plate-shaped structure extending outwards from the central axis of the reduction nail; nail inserting holes are formed in the plate-shaped structure; the anti-rotation nail is inserted into the broken bone after passing through the nail inserting hole; and the insertion parts of the anti-rotation nail and the reduction nail are inserted into the broken bone to realize rotation prevention. The anti-rotation nail and the reduction nail are combined and arranged on the same instrument structure through the anti-rotation structure, rotation loosening during reduction operation on the broken bone is prevented through cooperation of at least two structures inserted into the broken bone, and the reduction effect is effectively guaranteed. A patient reference frame can be further arranged on the anti-rotation structure, so that resetting operation and the navigation tracking process are synchronized.

The invention provides a kit for navigation reduction of long bone fractures, which relates to the field of medical navigation technology and comprises: two reduction components, each of which is provided with a reference frame with an NDI ball, comprising a reduction pin for fixing the broken bone so that the reduction pin and the broken bone can move synchronously; a positioning plate and an anti-rotation pin, wherein the positioning plate is provided on the reduction pin, and the anti-rotation pin is provided on the positioning plate, and is used to assist the reduction pin in being fixed in the broken bone to prevent the reduction pin and the broken bone from rotating relative to each other; an operating handle is provided on the outside of the reduction pin, and after the operating handle is combined, the position of the operating handle and the reduction pin remains unchanged, thereby playing a driving role; a reference frame is provided with an NDI ball, and after the reference frame is provided, the position of the reference frame and the reduction pin does not change; the kit further comprises a navigation shooting instrument and a display device, wherein the reference frame on the reduction component is tracked by the navigation shooting instrument, and image changes of the broken bone are displayed in real time according to changes of the reference frame tracked by the navigation shooting instrument.

The present invention discloses a method for constructing a guide plate for reduction and fixation of long bone fractures, and relates to the technical field of orthopedic medical device design. The present invention includes obtaining long bone images and presetting screws before surgery; designing and making the guide plate; distinguishing the indications of the guide plate; designing the shape of the guide plate; arranging the positioning pins; arranging the bone round pins; setting the skin incision holes of the guide plate; designing the disassembly of the guide plate; and making the guide plate. The present invention uses 3D digital technology to complete the screw placement and reduction in one go, minimizes the exposure field during surgery, reduces damage to soft tissues, greatly reduces postoperative recovery time, alleviates patient pain, reduces the risk of poor wound healing after internal fixation, allows patients to stand up on the ground as soon as possible to exercise lower limb function, and accelerates the healing of fractures.

An analysis method for optimizing number and position of screws used in long bone (fracture fixation) surgery, including the following steps. Perform a CT scan on a surgical patient to obtain a medical image to build a long bone 3D model. Analyze an X-ray image to obtain a long bone fracture condition and a bone quality condition. Select a bone plate 3D model from the model database. Import the bone plate 3D model into the long bone 3D model and set an initial fixation position of the bone plate 3D model. Instruct the first artificial intelligence to comprehensively analyze the conditions to automatically select alternative solutions in the model database. Then, use a computer-aided analysis system to analyze the stress distribution of the alternative solutions, and a first preferred solution is obtained through simulating analysis, thereby excluding incorrect or ineffective surgical plans to reduce the analysis time and patient wait time and increasing the surgery success rate.

The present invention discloses a long bone fracture reduction surgical robot, comprising a robot carrier body, a lifting push rod integrated inside the robot carrier body; a ball screw slide connected to the robot carrier body via the lifting push rod, the lifting push rod drives the ball screw slide to move along the Z direction; and a centering connection mechanism connected to the ball screw slide via a telescopic rod structure, the centering connection mechanism being away from an end electric cylinder mechanism at one end of the telescopic rod structure, the end electric cylinder mechanism driving the Kirschner wire holding ring to move via two electric cylinders; the Kirschner wire holding ring clamps the Kirschner wire and drives the Kirschner wire to move. The robot of the present invention adopts a hybrid structure to perform linear motion through mechanisms such as push rods, ball screw linear modules and cylinders to complete the six-degree-of-freedom reduction and transformation operation. The overall structure of the present invention is simple and lightweight, and is convenient to fold and move, effectively reducing the doctor's physical exertion and radiation damage, and can be adapted to different occasions to improve the accuracy of reduction surgery.

The utility model discloses a bone connection slip sheet structure, which relates to the field of skull repair of children, and comprises a repair component, the repair component consists of a fixed part and a sliding part, and the sliding part is embedded into the fixed part and is in sliding connection with the fixed part; according to the scheme, a slide way type bone connection mode is adopted, and compared with an existing titanium steel mesh fixing and repairing mode, the first repairing sliding piece and the second repairing sliding piece which are used for connection during skull repairing or long bone fracture connection can extend in a sliding mode, the firmness degree of connection between normal bones can be guaranteed, growth of the bones of children cannot be limited, and the safety of the children is improved. The bone repairing agent is very suitable for children bone repairing.

The invention belongs to the technical field of medical instruments, and discloses a treatment device integrating fracture reduction and fixation, the treatment device integrating fracture reduction and fixation comprises a first fixing body, the first fixing body is hinged with a second fixing body through a first convex ball, and the second fixing body is movably connected with a third fixing body through a movable rod; and the spiral joint is rotationally arranged on the third fixing body through the second convex ball. A set of complete reduction operation procedures are established for shortening displacement, rotating displacement and lateral displacement of the fracture difficult to reduce, the problems of shortening, rotating and lateral displacement of the fracture are solved in sequence step by step, and finally the purpose of anatomical reduction of the fracture is achieved. And a plurality of needle placing holes are reserved in the device and are arranged longitudinally and transversely, the device is suitable for various different types of long bone fractures, the needle holes are large, fixing needles with different diameters can be placed, screws directly abut against the fixing needles, and the application range is wide.

The application discloses a long bone fracture external fixing frame with distraction and pressurization functions, comprising a plurality of bone nails, at least two connecting frames and a bidirectional screw rod. The bone nail comprises a sharp part, a threaded rod part and a connecting head part; the connecting frame is provided with a plurality of through holes and a plurality of locking members; the locking members are arranged correspondingly beside the through holes or the connecting head parts; the connecting frame is provided with a threaded adjusting hole; one end of the bidirectional screw rod is provided with a first threaded section, and the other end is provided with a second threaded section with a rotation direction opposite to that of the first threaded section; the bidirectional screw rod is provided with a holding part. The through holes of the connecting frame are distributed at intervals along the length direction, the assembly hole positions can be selected flexibly according to the fracture positions and the bone nail implantation points, different long bone forms can be adapted, and the force line deviation caused by the limited fixed positions is avoided. When the bidirectional screw rod is rotated, the two connecting frames move synchronously and reversely, the equidistance displacement is realized by single rotation, the asynchronization error caused by separate adjustment is avoided, the precision and efficiency of pressurization or distraction are improved, and the axial pressure or distraction force can be applied by controlling the rotation direction and the number of turns.

The invention relates to medicine and can be used for treating severe polytrauma and complex fractures, for example, of the tibia long bone. A robotized system for the closed reduction of a fractured femur comprises a system of actuators based on a Stewart platform, a working member assembly, Schanz pins, a perineal post, and a controller with software. The Stewart platform is mounted on a floor plate via a vertical column. The linear actuators are arranged between a base plate and an end effector having a C-shaped ring. The two ends of the actuators are connected by hinges to the base plate and the end effector, respectively. The Schanz pins are secured to mounting blocks which are fastened by round-head screws and wingnuts. The perineal post is mounted on a base plate via a vertical column. The post is connected to two additional links. An O-shaped ring of the perineal post is connected to the C-shaped ring by a trapezoidal steel ring. A Schanz pin is mounted on a steel block such as to be capable of holding a proximal fragment in place during the reduction process. The invention results in precise traction forces and the optimal alignment of bone fragments.

Provided is a method of manufacturing a prosthesis for a fractured long bone of a patient, the method including the steps of: A) providing data representative of the fractured long bone in a patient; B) based on said data, designing the prosthesis specifically to the patient, the prosthesis including a stem part that is configured to secure fragment(s) of the fractured long bone at chosen securing position(s) that will apply chosen mechanical stress onto the bone fragments and reduce the risk of osteonecrosis of the bone fragments.

The invention relates to the technical field of fracture reduction assistance, in particular to a long bone fracture reduction method and system based on image processing. The method comprises the following steps: acquiring an upper fracture edge of an upper broken bone area and a lower fracture edge of a lower fracture area in a long bone fracture image, and selecting an upper target base point from the upper fracture edge according to the position and sharpness of an upper edge pixel point of the upper fracture edge; selecting a lower target base point on the edge of the lower fracture according to the position of the upper target base point on the edge of the upper fracture and the relative size of the width of the upper fracture area and the width of the lower fracture area; according to the relative positions of the upper target base point and the lower target base point and the direction trend of the edge of the upper fracture, a reduction path of the long bone fracture is determined; and moving the upper broken bone area along the reduction path to assist the reduction of the long bone fracture. Collision in the fracture reduction process can be avoided, the movement path of the broken bone is shortest, and the reduction effect on the long bone fracture is improved.

The invention relates to the technical field of medical equipment, in particular to a fracture near-end fixing device for lower limb long bone fracture reduction. The fracture near-end fixing device for reduction of the lower limb long bone fracture comprises a positioning mechanism, a clamping mechanism and a guide connecting piece for connecting the positioning mechanism and the clamping mechanism, the positioning mechanism is provided with a first auxiliary kirschner wire, and the first auxiliary kirschner wire is used for performing coarse positioning on a fracture area; the guide connecting piece can rotate around the axis of the first auxiliary kirschner wire; the clamping mechanism comprises a main kirschner wire and a clamping piece, the clamping piece is provided with a clamping space used for containing the fracture area, and one end of the main kirschner wire extends to the clamping space and is used for precisely positioning the fracture area. The bone positioning device can be used for long bone fracture reduction, the mechanical and precision requirements of long bone fracture reduction are met, and stable and fixed long bone fracture near-end holding and fixing are achieved in combination with clinical requirements; the problems that an existing device is unstable in holding, occupies too many operation space resources, destroys fracture blood supply and the like can be solved.

Reposition and penetration forceps for fractures of long bones, in particular traumatic fractures of tibia in centre line, that comprise two jaws forming a three-point system in opposition, wherein the first movable jaw (1) comprises two threaded pins (7) with tips (21) and the second firm jaw (2) comprises one threaded pin (7) with a tip (21). An external fixator for fractures of long bones, in particular traumatic fractures of tibia in centre line, which comprises at least two sets of forceps, wherein the sets of forceps are arranged identically or in a mirror image to each other.

The utility model discloses a long bone fracture dislocation reduction fixator which comprises an arc-shaped bottom provided with an arc surface, and the arc-shaped bottom supports a normal bone and a dislocation bone through the arc surface; the upper reduction forceps comprise an upper handheld end and an upper occlusion end; the lower reduction forceps and the upper reduction forceps are connected through a rotating shaft, the lower reduction forceps comprise a lower handheld end and a lower occlusion end, the upper occlusion end abuts against the arc-shaped bottom, and the lower occlusion end abuts against the malposed bone; the bone screw is arranged on a normal bone, and at least part of the bone screw extends into a dislocated bone. During reduction, the upper occlusion end abuts against the arc-shaped bottom, the lower occlusion end abuts against the malposed bone, the malposed bone is reduced to the normal position, the medullary cavity axis of the malposed bone coincides with the medullary cavity axis of the normal bone, at the moment, the malposed bone is fixed to the normal bone through the bone screw, reduction of the bone is achieved, and it is guaranteed that the fracture position does not deviate or distort any more.

The invention discloses an expandable and telescopic intramedullary nail system suitable for small animal long bone fracture, and relates to the field of fracture fixation instruments, the expandable and telescopic intramedullary nail system specifically comprises a double-head screwdriver, an expandable intramedullary nail and a threaded guide needle, and the expandable and telescopic intramedullary nail system is characterized in that the expandable intramedullary nail comprises a shell and an inner core. The double-end screwdriver, the threaded guide pin and the expandable intramedullary nail play a role in fixing nails on the fracture part, the expandable intramedullary nail is used for being matched with bones with different diameters, when the inner core is inserted into the shell, the bottom end of the inner core abuts against the two external expansion ends of the shell to expand outwards, and the expansion process is achieved; the mode adapts to fixation of bones with different diameters, the inner core can be screwed into the shell, so that tissue cannot grow into the shell to cause influence when the device is taken out in the later period, and meanwhile, the second positioning block can be cut off through the bent end, so that the size of the expandable intramedullary nail of the device is further reduced; the skin tissue can be completely closed.

An intramedullary nail (10) includes a proximal body portion (13) and a distal body portion (14) coupled to each other for axial reciprocation. The proximal and distal body portions (13, 14) define a length (110) of the intramedullary nail (10) extending between opposed proximal and distal ends (11, 12) of the intramedullary nail (10). An inflection point (62) is located along the length (110), where the length (110) is bifurcated into a proximal length (111) proximal to the inflection point (62) and a distal length (112) distal to the inflection point (62). Proximal bores (96, 97) are located proximate the proximal end (11) of the intramedullary7 nail (10). Distal bores (30) are located proximate the distal end (12) of the intramedullary nail (10). An interlocking screw hole (95) is located proximate to and distal from the inflection point (62). The interlocking screw hole (95) is located along the distal length (1 12) in the proximal body portion (13) of the intramedullary nail (10).

The invention relates to the technical field of medical instruments, and particularly discloses a bone nail and a connecting assembly for converting long bone fracture from strong fixation to biological fixation. The bone nail comprises a nail cap and a screw main body, a first external thread is arranged at one end of the screw main body, a limiting table is arranged at the other end of the screw main body, a limiting groove matched with the limiting table is formed in the screw cap, and the screw cap is arranged on the limiting table in a sleeving mode; the cross section of the limiting table is in the shape other than a circle so that the screw cap can be prevented from rotating relative to the axis of the screw body. Only the nail cap on the bone nail is made of degradable materials. Or, only the periphery of the first external thread on the bone nail is provided with a degradable coating. The connecting assembly comprises a bone fracture plate and a plurality of bone nails, and the bone nails are connected with the bone fracture plate. Therefore, the problems that in the prior art, the fracture end shifts during fracture treatment, biomechanics is unstable, and the postoperative healing effect is affected are solved.

The present application relates to the technical field of medical equipment, in particular to a surgical robot for closed reduction of long bone fracture. The surgical robot for closed reduction of long bone fracture comprises a first adjusting mechanism, a second adjusting mechanism, a moving platform and a holding mechanism. The first adjusting mechanism has a first output end, which is movable in a first direction, a second direction and a third direction respectively, and rotatable around an axis along the second direction. The first output end is connected with the moving platform through a first universal joint unit. The second adjusting mechanism has a second output end, which is movable in the first direction, the second direction and the third direction respectively, and rotatable around an axis along the third direction. The second output end is connected with the moving platform through a second universal joint unit. The holding mechanism is arranged on the moving platform. The first direction, the second direction and the third direction are perpendicular to each other. The present application can solve the problems of small motion space range, oversized structure, weak load bearing capacity, insufficient structural rigidity and low reduction accuracy of the current fracture reduction robot.

The utility model belongs to the technical field of medical instruments, and particularly relates to a hard bone clamping and fixing instrument for simulating an operation, which is mainly used for fixing a long bone in a long bone fracture simulation operation under a navigation system. The device mainly comprises a connecting arm; the fixing piece is connected with the connecting arm, the fixing piece is provided with a first fixing part and a second fixing part, and the first fixing part and the second fixing part are opposite to each other; the fastener is connected with the first fixing part, the fastener can move towards the second fixing part relative to the first fixing part, and the fastener can abut against the second fixing part; the long bone model fixing device mainly solves the problem of how to fix a long bone model for simulating an operation.