50 results about "High tibial osteotomy" patented technology

A cutting block for use in a bone osteotomy procedure is disclosed, and includes a first cutting guide surface, a second cutting guide surface, and a third cutting guide surface. The first, second, and third cutting guide surfaces are adapted to be temporarily affixed to a bone having a first side and a second side such that the first cutting guide surface is disposed on the first side of the bone, and such that the second cutting guide surface and third cutting guide surface are disposed on the second side of the bone forming an angle therebetween.

A cutting block for use in a bone osteotomy procedure is disclosed, and includes a first cutting guide surface, a second cutting guide surface, and a third cutting guide surface. The first, second, and third cutting guide surfaces are adapted to be temporarily affixed to a bone having a first side and a second side such that the first cutting guide surface is disposed on the first side of the bone, and such that the second cutting guide surface and third cutting guide surface are disposed on the second side of the bone forming an angle therebetween.

The invention provides methods and apparatus for accurately cutting bones with a surgical cutting device, such as a sagittal saw, using a surgical navigation system without use of a complex cutting jig. A surgical navigation system is used to navigate a guide tube to be used to drill a k-wire into the bone. The k-wire will act as a guide to control at least one degree of freedom of a saw blade for making a cut in the bone. In an exemplary high tibial osteotomy procedure, in which two intersecting planar cuts must be made in the tibia in order to remove a wedge of bone, a surgical navigation marker is mounted on the guide tube. The surgeon uses the surgical navigation system to navigate the guide tube to the desired varus-valgus angle and height of the first cut and then drills a k-wire into the tibia at that varus-valgus angle using the guide tube. The process is repeated for the second cut. The surgeon then uses the two k-wires as guides for controlling the varus-valgus angle of a sagittal saw for the two planar cuts. The surgeon rests the saw blade flat on the respective k-wire to define the varus-valgus angle of the cut. The saw itself also is navigated, with the surgical navigation system providing a display showing the surgeon at least (1) the varus-valgus angle, (2) the cut depth, and (3) the anterior-posterior slope. The anterior-posterior slope and the depth of the cut is controlled freehand by the surgeon.

The invention provides a navigation device capable of accurately positioning high tibial osteotomy. The navigation device comprises a positioning template and a bone cutting template, wherein the positioning template comprises a first fixing sheet, and navigation holes are formed in the first fixing sheet; the bone cutting template comprises a second fixing sheet, and a pendulum saw bone cutting groove is formed in the second fixing sheet. The invention further provides a manufacturing method of the navigation device capable of accurately positioning the high tibial osteotomy. The method comprises the following steps: collecting raw data, establishing a three dimensional model, determining a bone cutting plane and a bone cutting angle, designing navigation templates and making the navigation templates. Through the adoption of the navigation device and the manufacturing method thereof, which are disclosed by the invention, the diagnostic accuracy is further improved, the bone cutting accuracy is guaranteed, the limb alignment is restored, postoperative complications are reduced, and the functions of knee joints are improved.

A force line positioner for the high tibial osteotomy comprises a force line measuring piece and a fixing assembly. The force line measuring piece is a length extending piece with the consistent extending direction as the lower limbs of a human body. The two ends are aligned to the central point of the human body caput femoris and the central point of the ankle for measuring a lower limb force line; the fixing assembly is used for installing the force line measuring piece and connected with the human body, and at least one end of the force line measuring piece is movably connected with the fixing assembly so that the end of the force line measuring piece can be adjusted inside the horizontal plane perpendicular to the length direction of the force line measuring piece. The problems that due to the fact that according to the existing high tibial osteotomy, a surgeon needs to hold the force line measuring piece by hand to perform the positioning work, the accuracy of the high tibial osteotomy is affected, the radiated dosage of the surgeon is increased, and the body health of the surgeon is affected are solved.

The present invention relates to the field of clinical medicine, and in particular to a system, a computer readable storage medium and an apparatus that can be used for two-dimensional planning of high tibial osteotomy. The present invention provides a computer readable storage medium storing a computer program, the computer program is executable to implement method steps, and the method steps comprise: acquiring a lower-limb full-length weight-bearing-position bone fluoroscopic image; acquiring a force line position; acquiring a lateral angle of the distal femur; acquiring a medial angle of the proximal tibia; acquiring an osteotomy angle [theta], and acquiring the position of the postoperative force line and/or the postoperative medial angle of the proximal tibia according to the osteotomy angle [theta]. The method provided by the invention can flexibly select the target position of the postoperative force line according to different lower limb conditions of different patients, so that the planning is more individualized.

The invention relates to a progressive distracter after gonitis tibial osteotomy and belongs to the technical field of orthopedic medical devices. The progressive distracter is used for distracting agonitis tibial osteotomy part. The technical scheme is that an upper distracting plate and a lower distracting plate are rectangular flat plates respectively, the front ends of rectangles of the upperdistracting plate and the lower distracting plate in the length direction are connected through a rotating shaft, the rotating shaft is perpendicular to the length direction of each rectangle, the opposite plate surfaces of the upper distracting plate and the lower distracting plate are provided with threads, the threads are along the center lines of the upper distracting plate and the lower distracting plate in the length direction respectively, a distracting screw is conical, a conical rod body is circumferentially provided with a thread, and the thread of the distracting screw is matched with the threads on the plate surfaces of the upper distracting plate and the lower distracting plate. The progressive distracter is simple in structure, convenient to use and good in effect; an osteotomy gap can be progressively slowly distracted during an operation, the inner side cortex is kept intact and not broken during the operation, and the goal of placing a bone block or a polymer filler in the osteotomy gap purely to form an inner side support without needing an additional bone plate for fixation is achieved.

The invention provides absorbable pads for high tibial osteotomy and belongs to the technical field of orthopedic medical devices. The absorbable pads are used for high tibial osteotomy and used for treating knee osteoarthritis. A technical scheme of the absorbable pads is characterized in that the pads are boards, and ejection bars are straight bars; the thickness of each pad is gradually increased from the front end to the rear end, a wedge shape is formed, and the rear part of the pad is wider than the front part of the pad; bulging barbs are arranged on the upper board surface and the lower board surface of each pad, and front ends of the barbs are sharp; an ejection bar hole is formed in the rear end surface of each pad and penetrates through a pad body slantwise from the rear end surface of the pad to the upper front part, a front end opening of the ejection bar hole is located in the upper plate surface of the pad, the ejection bar penetrate through the ejection bar hole, and the front end of the ejection bar is opposite to a tibia platform. The absorbable pads are initiative for proximal fibular osteotomy combined high tibial osteotomy, effectively solves the problem that too large varus deformity cannot be corrected with fibular osteotomy, can perform synchronization therapy on associated compression fractures or collapse of a tibial plateau and greatly simplifies the surgical process.

The invention relates to the field of medical instruments, in particular to a device for high tibial osteotomy. The device comprises a near-end component, a far-end component, a connecting bridge component, Kirschner wires, a fixing component and a calibration force line component, wherein the near-end component and the far-end component are located at the two ends of the connecting bridge component respectively and fixed to a tibia through Kirschner wires; the calibration force line component is connected with the near-end component through a bolt; and the fixing component is attached to thesurface of the tibia having undergone force line correction and connected with the near end and the far end of the tibia through Kirschner wire hole sites. According to the invention, the design of bony wainscots for the near end and the far end of the tibia is adopted, so the area of a tibia incision near an osteotomy line can be reduced, an operative wound is narrowed, and tissue around the osteotomy line is better protected; the device integrates three functions of osteotomy, force line correction and temporary immobilization and steel plate installation in a high tibial osteotomy operation; operation steps are simplified, operation time is shortened, operation risks are reduced, and the effect of treating knee osteoarthritis through the high tibial osteotomy operation can be better promoted.

The invention relates to the field of medical instruments, in particular to a method for constructing a model of a personalized high tibial osteotomy angle matching template. The method for constructing the model of the personalized high tibial osteotomy angle matching template comprises the steps that a first outer side reference point and a second outer side reference point are obtained; a firstinner side reference point is obtained; a second inner side reference point is obtained; a first reference plane is obtained; a second reference plane is obtained; a body model of the matching template is constructed; a hold part is built. The construction method is based on the three-dimensional model obtained through preoperative scanning CT reconstruction of a patient, the personalized high tibial osteotomy angle matching template constructed through the construction method after 3D printing can be used for increasing the angle after tibial cutting, and therefore errors in the operation process can be effectively avoided. Besides, operation time can be greatly saved, and the method has a good industrialization prospect.

To facilitate insertion of an implant while retaining a cut in an opened state. There is provided a spreader 1 for high tibial osteotomy to be inserted into a cut made in the deformed femur or tibia of a patient with knee osteoarthritis, and to open the cut so as to make a space that allows insertion of an implant, comprising: two pairs of swinging members 2a/2b and 3a/3b which are respectively connected in a relatively swingable manner by hinge parts 6 and 7 disposed at the distal end; and two opening/closing mechanisms 4 and 5 which open/close these two pairs of swinging members 2a/2b and 3a/3b respectively about the axes of the hinge parts 6 and 7, wherein the two pairs of swinging members 2a/2b and 3a/3b are detachably assembled in the axial directions of the hinge parts 6 and 7.

The invention is related with an external fixator that is used in High Tibial Osteotomy (HTO) surgeries, including at least one positioner (1) for gripping the leg from both sides, at least one angulation device (3) and a proximal arch (8) that is connected to the positioner (1), at least one proximal schanz holder (7) on the proximal arch (8), at least one distal schanz holder (4) at the bottom of the angulation device (3), at least one osteotomy block (5) that enables to set the size and the location of the incision on the proximal arch (8), at least one fibular head positioning device (2) that is connected to the angulation device (3) and at least one angular indicator (scale) (19) on the fixator, on which the correction can be adjusted and controlled.

The invention relates to the field of medical instruments, and particularly relates to a construction method of a high tibial osteotomy guide plate model. The construction method of the high tibial osteotomy guide plate model comprises the steps that a three-dimensional tibia model is obtained; the upper and lower boundary interfaces of the guide plate are obtained; a rotating reference shaft is obtained; the inner and outer side boundaries of the defined guide plate area are formed with the rotating reference shaft acting as the axis; the defined guide plate area is formed; the point set of the defined guide plate area is obtained; a guide plate initial surface is obtained through fitting; a guide plate body model is constructed; multiple transverse osteotomy guide holes are constructed;and multiple ascending osteotomy guide holes are constructed. According to the high tibial osteotomy guide plate and the design method thereof, the accuracy of tibia osteotomy can be effectively enhanced, and the effects of reducing the operation time, reducing the radiation dose to the doctor and the patient and ensuring accurate implementation of preoperative planning of osteotomy can be realized.

Embodiments of the invention provide a positioning method and system for a bone cutting plane of high tibial osteotomy. The method includes the following steps: determining a reference plane of the upper end of a tibia in a three-dimensional model of lower limbs, and arranging an axis perpendicular to a normal position reference plane along a planned shaft point on the three-dimensional model of the lower limbs; translating the reference plane of the upper end of the tibia to make the reference plane of the upper end of the tibia pass through the shaft point, and rotating the reference plane of the upper end of the tibia with the axis as a rotation shaft to a target cutting position; and selecting a to-be-cut square area in the reference plane of the upper end of the tibia as the bone cutting plane of the three-dimensional model of the lower limbs. Embodiments of the positioning method and system strictly guarantee that the bone cutting plane passes through the planned and determined shaft point; the bone cutting plane is determined by rotating the reference plane of the upper end of the tibia along the axis, it can be ensured that in a process of bone expanding, two parts of a bone cutting surface only have deflection around the axis, and bones are prevented from being misaligned in other directions; and compared with the prior art, there is no need relying on doctor's experience and repeated fluoroscopy, and the operation duration and an operative risk are reduced.

The invention discloses an auxiliary tool for inner side high tibial osteotomy. The auxiliary tool comprises an osteotomy guiding template comprising a main body with a fitting curved surface fitting with a curved surface in an area under the inner side of a tibial platform; a lower-side wedge-shaped tibial osteotomy guiding structure and a lower-side tibial tubercle osteotomy guiding structure are arranged on opposite surfaces of the fitting curved surfaces, a first positioning clay contacting the highest bump point of the tibial tubercle is arranged on one side of the main body, and a second positioning claw and a third positioning claw contacting the inner side of the tibial platform are arranged at the upper part of the main body. The special osteotomy guiding template provided by the invention accordant with patient condition is designed in an individualized manner and customized, and by using the special osteotomy guiding template, a doctor can rapidly perform an operation, operation time can be reduced, positioning can be accurate and convenient in the operation, osteotomy accuracy can be furthest improved, the number of fluoroscopy in the operation can be reduced, and thus an achievement ratio of operation is improved, and an infection rate in operation and a recurrence rate are reduced.

The invention discloses a gradual distraction device used after tibial osteotomy and capable of maintaining inner-side cortex to be free of fracture and belongs to the technical field of orthopedic medical instruments. The gradual distraction device is used for distracting a gonitis tibial osteotomy position. The front ends of an upper distraction plate and a lower distraction plate are connectedby a distraction plate rotating shaft, the front end of a distraction seat is connected with the rear ends of the upper distraction plate and the lower distraction plate through connection rod rotating shafts, one end of a distraction connection rod is connected with a connection rod rotating shaft while the other end of the same is connected with a pull rod rotating shaft, the rear end of the distraction seat is connected with the front end of a sleeve, a thread is formed in the rear portion of the sleeve, a spiral pull rod is positioned in the sleeve, the front portion and the rear portion of the spiral pull rod are in rotatable connection, the front end of the spiral pull rod penetrates the distraction seat and is provided with a shaft hole, the pull rod rotating shaft and the shaft hole of the spiral pull rod are in rotating fit, and the rear portion of the spiral pull rod is provided with a thread matched with the thread in the rear portion of the sleeve. By the gradual distraction device, gradual and slow distraction can be implemented on an osteotomy gap during operation to maintain the inner-side cortex to be complete and free of fracture during operation.

The invention relates to the technical field of medical equipment, and in particular to a surgical guide plate for high tibial osteotomy. The surgical guide plate comprises a proximal tibia fixation module, a guide plate connecting rod, and a medial and lateral malleolus positioning module, wherein the proximal tibia fixation module is fixedly installed at the top of the guide plate connecting rod, and the medial and lateral malleolus positioning module is fixedly installed at the bottom of the guide plate connecting rod. The instrument provided by the invention has the advantages such as short surgical time, accurate positioning of an osteotomy position, less number of intraoperative X-ray exposures, short surgical incision, and small soft tissue trauma.

The invention discloses a drill bit guider for high tibial osteotomy. The drill bit guider comprises positioning rods, a positioning block, sliding rods, sliding rod locking bolts, a drill module anda universal adjustment mechanism, the quantity of the positioning rods is two, the front ends of the positioning rods are inserted into the knee joint cavity of a patient, and the middle portions or the rear ends of the positioning rods are fixedly connected with the positioning block; the sliding rods are inserted into through holes at the positioning block, and the sliding rod locking bolts arescrewed into threaded holes at the positioning block, and prop against the sliding rods; and the drill module is close to a position, needing spacer implantation, of the proximal tibia of the patient,and is connected with the sliding rods through the universal adjustment mechanism, and the drill module is provided with a row of drill bit guiding holes corresponding to the tibia of patient. The position and the angle of tibia drilling are adjusted by the sidling rods and the universal adjustment mechanism by using a tibial platform as a positioning reference, so the drilling difficulty is greatly reduced, thereby the drilling accuracy in high tibial osteotomy is ensured, the smooth implantation of the spacer is guaranteed, the operation efficiency is effectively improved.

The invention provides an adjustable gasket for osteotomy. The gasket includes an upper gasket, a lower gasket and an adjusting assembly; the adjusting assembly is arranged between the upper gasket and the lower gasket, connected with the upper gasket and the lower gasket, and used for adjusting the spacing and angle between the upper gasket and the lower gasket to a preset spacing and a preset angle to make the upper gasket and the lower gasket abut against a first osteotomy surface and second osteotomy surface of an osteotomy area when the adjustable gasket for the osteotomy is implanted into the osteotomy area of the tibia respectively. Thus, the thickness and tilt angle of the gasket can be freely adjusted according to the conditions of different patients during the high tibial osteotomy to adapt to different osteotomy needs. The problem is solved that the thickness and cleaning angles of gaskets adopted in the existing high tibial osteotomy cannot be adjusted.

The invention discloses an external fixing device for a knee joint; the external fixing device comprises a tibial upper fixing member, a tibial lower fixing member and a tibial fixing member; the tibial upper fixing member and the tibial lower fixing member are universally connected or supported by at least one main support rod and one secondary support rod, so that the external fixing device canadapt to high tibial osteotomy to open different angles of the inner side of tibia according to the needs of different patients; a joint member is arranged between the tibial fixing member and the tibial upper fixing member, to counteract the pressure applied on the inner side of a tibial plateau by femur; the joint member contains a bulge that can roll and slide relative to one bearing seat of the joint member, so that with rolling and transverse movement of the femur on the tibial plateau during knee joint movement, and the external fixing device is the external fixing device applicable to high tibial osteotomy or knee joint cartilage tissue repair surgery for legs of a patient.

The invention provides separated bone plates for high tibial osteotomy. The separated bone plates for high tibial osteotomy comprises an upper bone plate and a lower bone plate; a plurality of bone nail holes are formed in the upper bone plate and the lower bone plate; an upper warping plate and a lower warping plate are vertically installed on the same side of the upper bone plate and the same side of the lower bone plate, respectively; hollow telescopic connecting rods on the two sides are fixedly installed on the lower bone plate; piston rings are fixedly installed at the ends, away from the lower bone plate, of the hollow telescopic connecting rods on the two sides; channels in the hollow telescopic connecting rods communicate with a channel formed in the lower bone plate; and threaded hole seats are movably installed in threaded rod grooves. According to the separated bone plates for high tibial osteotomy, the upper bone plate and the lower bone plate are arranged in a separated mode, so that pre-opening of a pin plate and cooperative work of locking pliers are not needed, and adjustability and accuracy of the angle of a tibia seam are guaranteed; meanwhile, in the installation process, medicine can be accurately conveyed into the tibia seam through the lower warping plate so that operation time is shortened with operation difficulty reduced and operation efficiency improved. Moreover, later recovery of the patient is also facilitated.