37 results about "Distal femoral osteotomy" patented technology

A bone plate(s) of complex form is provided, particularly suited to tibial plateau-leveling osteotomy and a distal femoral osteotomy. The bone plate has a main longitudinal axis, a bone-contacting bottom side (not shown) and a top side with at least three sets of overlapping holes which communicate through the plate from the top to the bottom side. The sets of overlapping holes define threaded apertures having multifaceted surfaces. When applied to a bone, two sets of such overlapping holes are located so as to lie on opposite sides of an osteotomy site and on the tibial plate; a third is aligned at approximately 60 degrees with the longitudinal axis. The configuration of this complex bone plate vary, depending on the physiology of the patient. An object of the invention is to provide an orthopaedic surgeon greater flexibility of choice in that a threaded peg providing secure fixing can be positioned at any interval along the bone plate, including at its extreme ends or on its elbow.

The invention discloses an osteotomy template for femur extramedullary positioning, and belongs to an auxiliary instrument for an artificial knee joint primary replacement operation. The osteotomy template is used for positioning for distal femur osteotomy in the artificial knee joint primary replacement operation, comprises a tibia surface guide plate (1) and a distal femur osteotomy guide plate (2), and is characterized by further comprising a connecting rod (3), an extramedullary positioning rod (4) and a distal femur osteotomy guide plate fastening nail (5); the tibia surface guide plate (1) can be connected with the distal femur osteotomy guide plate (2) through the connecting rod (3). Through application of the osteotomy template to the artificial knee joint replacement operation, the following advantages can be realized: opening of a femur medullary cavity is not needed, injury and bleeding are reduced, a minimally invasive effect is realized, the pain of a patient is relieved, the knee extension and flexion gaps can be directly determined, osteotomy for several times is not needed, and osteotomy is reduced to the most extent; the osteotomy template is a tool being simple to operate; through adoption of the osteotomy template, the operation duration is shortened, and no any additional cost for preoperative preparation is needed.

The invention relates to a surgery apparatus, in particular to a joint replacement surgery auxiliary positioning method and system based on inertia navigation. The system comprises a reference inertial sensor, a control terminal, a reference fixing frame, an adjustment inertial sensor, a distal femur osteotomy adjustment device, a distal femur osteotomy guider and a femur saw cutting groove. A method comprises the steps of S1, establishing communication connection among the reference inertial sensor, the adjustment inertial sensor and the control terminal; S2, demarcating the reference inertial sensor and the adjustment inertial sensor; S3, registering the femur; S4, calculating internal/external reversing angle and the front/rear inclining angle of the distal femur osteotomy adjustment device; S5, adjusting the internal/external reversing angle and the front/rear inclining angle through the distal femur osteotomy adjustment device, and determining the final osteotomy plane; and S6, performing osteotomy. According to the joint replacement surgery auxiliary position method and system disclosed by the invention, relevant axis recognition and positioning in the joint replacement surgery can be quickly realized, the surgery operation can be simplified, the surgery time is shortened, and the cost price can be reduced.

The invention provides a femoral guide plate for total knee replacement surgery and a using method thereof. The femoral guide plate comprises a femoral guide plate body, a first side of the femoral guide plate body is provided with a distal femur osteotomy groove aligned with a distal femur osteotomy surface and a preartis osteotomy groove aligned with a femur preartis osteotomy surface, a first sickle blade capable of verifying the distal femur osteotomy amount is inserted into the distal osteotomy groove, a second sickle blade capable of verifying the preartis osteotomy amount is inserted into the preartis osteotomy groove, a femur preartis fitting area is arranged at a first end of a second side, opposite to a first side, of the femur guide plate body, a second end of the second side, opposite to the first side, of the femoral guide plate body is provided with a femur medial condyle fitting area and a femur lateral condyle fitting area. The femoral guide plate is accurately positioned and installed, the distal femur osteotomy amount and the preartis osteotomy amount are accurately verified, accurate positioning of osteotomy in an operation is guaranteed, and the safety and the success rate of the operation are improved.

The invention discloses a gap-balancing-method knee-joint-replacement femur size measuring mold. Both a sliding sleeve and a small-column positioning block can slide on a body, and the back side of the sliding sleeve is connected with an upper foot plate in a pendulum-type hanging manner; during a knee extending position, the upper foot plate and a lower foot plate are inserted into spaces completing osteotomy of the proximal tibia and the distal femur and opened, and the size of a prosthesis gasket can be measured through a sliding-cover small window; meanwhile, the sliding sleeve abuts against the small-column positioning block at the upper portion, and slides upwards, and the relationship between the lower foot plate and the small-column positioning block is locked through a hook, a clamping pin and a spring. During a knee bending position, the sliding sleeve falls down, the upper foot plate and the lower foot plate are closed, and are inserted into spaces of the proximal tibia andthe posterior femoral condyle, the upper foot plate and the lower foot plate are opened again, it can be achieved that an medial collateral ligament, a lateral collateral ligament and the like are opened through tension before knee-bending-position osteotomy, drilling is conducted according to positioning holes formed in the two ends of the small-column positioning block, the positioning holes canserve as positioning holes for placing a four-in-one osteotomy module, and the size of a femur prosthesis can be measured through scale identifications of a pointer column inserted into the upper portion of the small-column positioning block at this moment.

The invention discloses a thighbone far-end osteotomy device for the orthopedics department and a positioning device thereof. The thighbone far-end osteotomy device comprises a thighbone far-end fixing plate. The center of the upper surface of the thighbone far-end fixing plate is connected with an intramedullary rod through welding. Two second connecting plates are welded to the lower surface ofthe thighbone far-end fixing plate. A lower end connecting and fixing plate is arranged at the lower portion of each second connecting plate. Thighbone far-end osteotomy can be conducted on a patientthrough the thighbone far-end fixing plate. A groove is formed in the thighbone far-end fixing plate, thighbone far-end fixing can be conducted on the patient through the groove, and fixing is more convenient. Thighbone near-end connecting at the lower portion of the patient can be conducted through the lower end connecting and fixing plates, the thighbone far-end is prevented from twisting, fixing is more comprehensive, and positioning can be conducted through a positioning plate. The thighbone far-end osteotomy device and the positioning device are simple in structure and convenient to install and can prevent rotation, fixing can be more convenient, and convenience is provided for doctors.

The invention provides a bone-cutting device used for knee joint replacement surgery. The bone-cutting device comprises a distal femur bone-cutting part, a base and a guide component, wherein the distal femur bone-cutting part comprises a connection part; the base comprises a base main body, and a first hole is formed in the base main body; the guide component comprises a first end used for beingmovably connected with the connection part and a second end used for insertion into the first hole; the base further comprises a base plate for contacting the bone-cutting end surface of the proximaltibia, and a through hole used for insertion of a force wire rod is arranged at the joint of the base main body and the base plate. For the bone-cutting device used for the knee joint replacement surgery provided by the invention, during the surgical process, under the condition that the femur medullary cavity is not damaged and the limitation of the shape of the femur medullary cavity of a patient is eliminated, the extramedullary alignment of the femur-side force line is realized, thus the postoperative rehabilitation time of the patient is shortened, and the risk of embolism caused to the patient can be avoided.

The invention relates to the technical field of a medical treatment device, and particularly relates to a thighbone osteotomy instrument suite in a minimally invasive knee prosthesis operation. The suite comprises a thighbone remote end osteotomy device and a thighbone preartis osteotomy device, wherein the thighbone remote end osteotomy device comprises a thighbone remote positioning module, an adjusting rod and a thighbone remote end osteotomy module; the thighbone preartis osteotomy device comprises a thighbone measurer, a thighbone preartis locator and a thighbone preartis osteotomy module. By using the thighbone remote end osteotomy device and the thighbone preartis osteotomy device, the thighbone remote end and the thighbone preartis can be exactly positioned and performed with osteotomy, thereby avoiding the repeat operation or operation failure caused by location and osteotomy bias, and reducing the operation risk.

The invention discloses a distal femur cutting assembly and an ectropion positioning device. The ectropion positioning device comprises a rotation plate, a fixing plate, and an operation piece. An overturn axis is rotatably connected between the rotation plate and the fixing plate. The operation piece is clamped and abutted between the rotation plate and the fixing plate. An adjusting portion which is protruded or recessed relative to a plane is arranged in an extending manner on the rotation plane of the rotation plate, opposite to the fixing plate. The operation piece is provided with an abutting portion. throuGh the abutting portion cooperating with the adjusting portion, angle overturn between the rotation plate and the fixing plate is realized. When the operation piece rotates, through cooperation of a first abutting portion and a first adjusting portion and cooperation of a second abutting portion and a second adjusting portion, the fixing plate turns over relative to the rotation plate, and an included angle is formed between the two plates, so as to form an ectropion angle.

The invention provides a minimally invasive distal femur medullary canal orientator. The minimally invasive distal femur medullary canal orientator comprises a main body, a rotating body, an orientating pull plug, a hollow shaft and a hollow end cap, wherein one end of the rotating body is rotatably connected with the main body; the other end of the rotating body is connected with the orientating pull plug; a tooth-shaped angle indicator panel is arranged at an end, which is connected with the orientating pull plug, of the rotating body; a tooth-shaped needle which is matched with the tooth-shaped angle indicator panel is arranged on the orientating pull plug; one end of the hollow shaft successively penetrates through the main body, the rotating body and the orientating pull plug; the end of the hollow shaft is fixed by the hollow end cap; the other end of the hollow shaft is rotatably connected with the main body; and an end, which is connected with the main body, of the rotating body is rotatably connected with the hollow shaft. On the one hand, the orientator is used for determining a knee physical valgus angle in the knee replacement; and on the other hand, the minimally invasive distal femur medullary canal orientator is used for positioning preartis osteotomy of a femoral condyle and distal femur osteotomy, is simple in structure and convenient to operate, and meanwhile is suitable for a left leg and a right leg.

The invention relates to the technical field of medical instruments, in particular to an adjustable osteotomy guider. The guider mainly comprises an osteotomy plate, an adjusting plate connected to the upper side of the osteotomy plate in a sliding mode in the front-back direction, a femur fixing nail for fixedly connecting the adjusting plate to the osteotomy face of the distal femur, and an adjusting assembly for connecting the osteotomy plate and the adjusting plate. The osteotomy plate is provided with a plurality of osteotomy grooves penetrating through the upper side and the lower side;the adjusting plate is provided with a long hole extending in the left-right direction; the adjusting assembly comprises an adjusting knob and an eccentric connecting piece; the lower end of the adjusting knob is fixedly connected with the upper end of the eccentric connecting piece; the adjusting knob and the eccentric connecting piece are eccentrically arranged; the adjusting knob penetrates through the upper side and the lower side of the osteotomy plate; the eccentric connecting piece is arranged in the long hole of the adjusting plate in a penetrating mode; and the eccentric connecting piece is matched with the adjusting knob to clamp the osteotomy plate and the adjusting plate together. The osteotomy guider has the effect of conveniently adjusting the osteotomy amount.

The invention discloses a navigation template for distal femur osteotomy and a design method thereof. The navigation aims at biplanar closed osteotomy in distal femur osteotomy. The distal femur osteotomy navigation template for distal femur osteotomy comprises an osteotomy orientation navigation template module, an osteotomy navigation template near-end optical positioning and tracking module, an osteotomy navigation template far-end optical positioning and tracking module and an osteotomy depth limiting module, so that the navigation and positioning precision in the operation can be improved, and the perspective radiation injury can be reduced. Meanwhile, in combination with the design method of the navigation template for distal femur osteotomy, a digital model and information of the osteotomy process are established before the operation, so that the dependence of doctors on operation experience is reduced, the risk of insufficient positioning during the operation is reduced, and the service level of carrying out distal femur osteotomy by inexperienced doctors and primary medical institutions can be promoted.

The invention discloses a femoral far-end osteotomy guide device for knee joint replacement. The device comprises a fixing part and a swing saw guide part installed on the fixing part, the fixing part is provided with positioning needle sleeving holes sleeved with positioning needles inserted in the femoral far-end, the swing saw guide part is provided with a guide hole for guiding during swing saw osteotomy, and the swing saw guide part is in pivot joint with the fixed plane formed by the positioning needles in a rotation positioning mode. According to the device, the positioning needles of an existing knee joint replacement device are used for fixing, the swing saw guide part is rotatably positioned around the fixed plane formed by the positioning needles, the angle of a swing saw inserted in the guide hole can be adjusted relative to the fixed plane, and osteotomy at different angles can be achieved, so that the device adapts to femoral structures of different patients; further recovery of the patients is achieved, and the problem is solved that the left and right parts of the leg of the patient cannot be completely symmetric.

The invention relates to a mark scraper for the thigh bone far end. The mark scraper is a marking tool used for marking a condyle through line after the thigh bone far end is cut in the knee prosthesis operation. The mark scraper for the thigh bone far end comprises a fixed end, a movable end, a locating column and a marking slot, wherein the lower end faces of the fixed end and the movable end are located on the same plane and are attached to the cut thigh bone far end, the locating column is attached to the protrusion of the outer side condyle of the thigh bone after the far end is cut and the depression of the inner side of the inner side condyle of the thigh bone, the condyle through line marked by the marking slot provides reference for cutting the thigh bone, and dependence on the front condyle or the rear condyle of the complete thigh bone is reduced.

The invention relates to a distal femur osteotomy instrument and relates to the field of medical instruments. The distal femur osteotomy instrument comprises a guider and an auxiliary positioning handle detachably connected to the guider, wherein a nail hole is formed in the guider; the nail hole penetrates through the upper side and the lower side of the guider; a first knife groove is formed in the guider; the auxiliary positioning handle comprises an insertion piece; and the insertion piece is matched with the first knife groove in an inserted mode. The instrument has the effects that the distal femur can be repositioned conveniently, and the positioning precision is improved.

The invention relates to the technical field of clinical operation of knee joint replacement distal femoral osteotomy, in particular to an intramedullary positioning rod for improving the precision ofdistal femoral osteotomy. The intramedullary positioning rod for improving the precision of distal femoral osteotomy includes a handle, a straight rod and a positioning head; one end of the straightrod is fixedly connected with the lower part of the handle, and the other end of the straight rod is provided with the positioning head; a sliding groove is formed in the interior of the straight rod,a screw is rotatably installed inside the sliding groove, a screw sleeve is threadedly connected with the lower part of the screw, a plurality of positioning pieces are symmetrically arranged at theopening of the straight rod, hinge bases, respectively located between two positioning pieces, are fixedly arranged on the straight rod, and the positioning pieces are hinged to the hinge bases; connecting rods are hinged to the inner sides of the positioning pieces, and the other ends of the connecting rods are hinged to the bottom of the screw sleeve. According to the intramedullary positioningrod for improving the precision of distal femoral osteotomy, by adding a rotary table to a handle end to control the tail end of the positioning rod, the tail end can be freely divided into four partsof the interior part, the exterior part, the back part and the front part, the position of the positioning rod in the femoral bone marrow cavity can be adjusted, it is ensured that the positioning rod can be precisely and effectively fixed to the center of the femoral bone marrow cavity, and accordingly the precision of distal femoral osteotomy and the postoperative satisfaction of a patient areimproved.