79 results about "Transtibial prosthesis" patented technology

The invention relates to the technical field of joint prostheses, in particular to an ankle joint prosthesis implantation system based on zirconium-niobium alloy, which comprises a tibia prosthesis (10), a talus prosthesis (30) and a liner (20), the tibia prosthesis (10) and the talus prosthesis (30) are both made of zirconium-niobium alloy material and are integrally formed by 3D printing, the tibia prosthesis (10) comprises a tibia body (101), and the liner (20) is arranged on the tibia body (101). The first bone contact layer (100) is integrally formed on the tibia body (101), and the first bone contact layer (100) is of a porous structure of which the pore diameter is gradually reduced from outside to inside; the talus prosthesis (30) comprises a talus body (301) and a second bone contact layer (300) integrally formed on the talus body (301), and the second bone contact layer (300) is of a porous structure with the aperture gradually reduced from outside to inside.

An ankle joint replacement prosthesis comprises a tibia prosthesis assembly and a talus prosthesis, the tibia prosthesis assembly comprises a tibia prosthesis body and a cushion block, the tibia prosthesis body and the cushion block are in an arc shape with the middle bent upwards on the sagittal plane, the cushion block is arranged at the bottom of the tibia prosthesis body in a sleeving mode, and the surface of the upper portion of the tibia prosthesis body is a tibia joint face. The surface of the lower portion of the cushion block is a first articular surface, the surface of the upper portion of the talus prosthesis is a second articular surface, the second articular surface is in an arc shape with the middle bent upwards on a sagittal plane, the surface of the lower portion of the talus prosthesis is a talus joint surface, and the first articular surface is matched with the second articular surface. When the prosthesis is implanted, only the articular cartilage and the subchondral bone need to be treated at the far end of the tibia, so that the bone at the far end of the tibia is reserved to the maximum extent, the anatomical integrity of the bone is guaranteed, the stability of the prosthesis is enhanced, the service life is prolonged, and the clinical operation effect is improved.

According to one example, a tibial prosthesis that can include a tibial bearing component, tibial baseplate, an insert and a fastener. The tibial bearing component can have medial and lateral proximal articular surfaces and an opposing distal surface. The tibial bearing component can define at least one recess therein with the recess having an opening at a periphery of the tibial bearing component. The tibial baseplate can be coupled to the tibial bearing component on the proximal surface thereof and having a distal surface configured to be disposed on a resected proximal surface of a tibia. The insert can be configured to be disposed within the recess and can engage the tibial baseplate and the tibial bearing component. The fastener can be insertable into the tibial bearing component and can be configured to retain the insert to the tibial baseplate.

The utility model provides a multi-curvature ankle joint prosthesis which comprises a tibia prosthesis connected with a tibia, a talus prosthesis connected with a talus and a cushion block with one side connected with the tibia prosthesis, a joint contact surface is arranged on the other side of the cushion block, and a talus contact surface matched with the joint contact surface is arranged on one side of the talus prosthesis. The curvature of the sagittal plane Z in the talus contact face is reduced from front to back, and the instantaneous rotation center of the talus prosthesis on the joint contact face is in an arc shape. According to the multi-curvature ankle joint prosthesis, the talus contact face and the anatomical structure of the human body are high in consistency, the natural form and the motion mode of the ankle joint are accurately restored, the ankle joint prosthesis better conforms to biomechanics and kinematics in the motion process, the motion stability of the human body is improved, local friction stress of the ankle joint prosthesis is smaller, and the ankle joint prosthesis is more stable in motion. And the service life of the ankle joint prosthesis is prolonged, so that the durability of the ankle joint prosthesis is improved.

The invention relates to the technical field of joint prostheses, in particular to an ankle joint prosthesis based on a bionic bone trabecula, the ankle joint prosthesis comprises a tibia prosthesis (10), a talus prosthesis (30) and a liner (20), the tibia prosthesis (10) and the talus prosthesis (30) are both made of metal materials and are integrally formed through 3D printing, the tibia prosthesis (10) comprises a tibia body (101), and the liner (20) is arranged on the tibia body (101). The first bone contact layer (100) is integrally formed on the tibia body (101), and the first bone contact layer (100) is of a porous structure of which the pore diameter is gradually reduced from outside to inside; the talus prosthesis (30) comprises a talus body (301) and a second bone contact layer (300) integrally formed on the talus body (301), and the second bone contact layer (300) is of a porous structure with the aperture gradually reduced from outside to inside.

The ankle joint prosthesis comprises a tibia prosthesis and a talus prosthesis, the tibia prosthesis is provided with a keel, the keel is used for being implanted into a tibia and extends in the front-back direction of the tibia prosthesis, the talus prosthesis is arranged on the lower side of the tibia prosthesis, the talus prosthesis is provided with a fixing rod, and the fixing rod is arranged on the lower side of the tibia prosthesis. The fixing rod is used for being implanted into the talus and obliquely extends downwards from front to back, an included angle alpha is formed between the extending direction of the keel and the extending direction of the fixing rod, and alpha is larger than or equal to 10 degrees and smaller than or equal to 85 degrees. The ankle joint prosthesis is reasonable in structural design, the stability of the ankle joint prosthesis in the human body movement process can be enhanced, and the dislocation risk of the prosthesis is reduced.

The invention provides a tibial prosthesis which comprises a tibial platform provided with a containing groove and a communicating groove, the containing groove is communicated with the upper surface of the tibial platform, and the communicating groove is communicated with the groove bottom wall of the containing groove and the lower surface of the tibial platform; the gasket structure is arranged in the containing groove in a floating mode in the vertical direction; the bone growth body is connected to the lower portion of the gasket structure and located in the communicating groove, and the gasket structure can drive the bone growth body to penetrate out of the tibial plateau downwards when floating in the vertical direction. According to the technical scheme, the problem that in the prior art, the time needed for combining the sclerotin and the prosthesis of a patient is long can be effectively solved.

The utility model provides a biological tibia prosthesis and a biological knee joint prosthesis. The biological type tibia prosthesis comprises a tibia support, a tibia prosthesis middle column is arranged on the bottom face of the tibia support, a rotatable ratchet wheel is arranged on the tibia prosthesis middle column, at least part of the ratchet wheel protrudes out of the outer surface of the tibia prosthesis middle column, a stop assembly is further arranged in the tibia prosthesis middle column, and the stop assembly can limit one-way rotation of the ratchet wheel. When the tibia prosthesis center pillar moves towards the inside of the medullary cavity, the ratchet wheel rotates under the action of the wall of the medullary cavity, and when the tibia prosthesis center pillar moves towards the outside of the medullary cavity, the ratchet wheel is kept in a static state under the action of the locking assembly. The biological knee joint prosthesis comprises the biological tibia prosthesis. According to the biological type tibia prosthesis, when the middle column of the tibia prosthesis moves towards the inside of a medullary cavity, the ratchet wheel can still be embedded into bone cortex and has a fixing function, and when the middle column of the tibia prosthesis moves towards the outside of the medullary cavity, the ratchet wheel is kept in a static state under the action of the stop assembly and has an anti-pulling effect.

The invention provides a prosthesis for knee joint unicompartmental arthroplasty, which comprises a femoral condyle prosthesis arranged at the femoral end of a knee joint; the tibia base prosthesis is arranged at the tibia end of the knee joint; the tibia gaskets are arranged between the tibia base prosthesis and the femoral condyle prosthesis, are always in sliding contact with the bottom of the femoral condyle prosthesis, and comprise a fixed gasket and a movable gasket, and any tibia gasket can be matched with the tibia base prosthesis for use; the movable gasket is arranged at the upper end of the tibia base prosthesis in a sliding manner; the fixed gasket can be detachably assembled at the upper end of the tibia base prosthesis through an inserting structure. The dual-purpose tibia prosthesis base designed by the invention is compatible with a fixed gasket and a movable gasket, the fixed gasket and the movable gasket can be flexibly selected and replaced according to the specific condition of a patient during an operation, the fixed gasket and the tibia prosthesis base are convenient to disassemble and assemble, and the complexity of surgical operation and surgical instruments is reduced.

The invention discloses a tibia prosthesis posture determination method and device, a storage medium and electronic equipment. The method relates to the technical field of medical treatment and comprises the steps that a theoretical rotation axis is determined according to a skeleton three-dimensional model of a target object, and the theoretical rotation axis is determined based on a posterior condylar line in the skeleton three-dimensional model; acquiring a pose transformation set of the knee joint of the target object from a straight position to a flexion position, and performing fitting according to the pose transformation set to obtain a fitting rotation axis; and determining target pose information of the tibial prosthesis according to the fitting rotation axis and the theoretical rotation axis. Through the method and the device, the problem that the accuracy of determining the pose information of the tibial prosthesis is relatively low due to the fact that the pose information of the tibial prosthesis is planned based on artificial experience in related technologies is solved.

The utility model relates to the technical field of medical instruments, and discloses a high-stability durable tibial prosthesis which comprises a locking mechanism, the locking mechanism is of a double-layer structure, an anti-rotation mechanism is rotatably arranged on the lower end face of the locking mechanism, a telescopic mechanism is movably arranged on the lower end face of the anti-rotation mechanism, and an implanting mechanism is fixedly arranged on the lower end face of the telescopic mechanism. The locking mechanism comprises a locking hole, a side wing steel plate, a tibial plateau, a bone trabecula porous structure, a locking bone screw, a first suture hole and a second suture hole, the anti-rotation mechanism comprises an anti-rotation block, an anti-rotation groove, a first cylindrical pin and an anti-rotation rod, and the telescopic mechanism comprises a telescopic handle, a second through hole, a second cylindrical pin, an adjusting button and an adjusting shaft. The implanting mechanism comprises an intramedullary nail and a bone cement groove. According to the bone trabecula prosthesis, the retraction mechanism is arranged and can be adjusted according to the requirements of different patients, and the bone trabecula porous structure and the anti-rotation mechanism are arranged, so that the prosthesis can be kept stable.

The application discloses a mechanical locking type tibial platform, a tibial prosthesis and a knee joint prosthesis. The mechanical locking type tibial platform comprises a platform holder used for being attached to the proximal end of a tibia, a middle column extending downward along the center of the platform holder and used for being inserted into the marrow cavity of the tibia, an axial hole being arranged in the center of the middle column, a sleeve arranged in the axial hole of the middle column, a limiting structure being arranged on the outer wall of the sleeve, the limiting structure being configured to cooperate with the middle column to enable the sleeve to slide only in the axial direction of the axial hole, a fastener connected to the sleeve and protruding from the outer side wall of the middle column and used for being inserted into the cortical bone of the tibia, and a stand column, one end of the stand column being provided with a limiting block used for abutting against the top surface of the platform holder, and the other end of the stand column being provided with a threaded segment which is threadedly connected to the inner wall of the sleeve. The cooperation of the stand column, the sleeve and the fastener can lock the platform holder to the proximal end of the tibia and ensure the initial stability of the tibial platform.

The application discloses a tibial prosthesis and a knee joint prosthesis with the same. The tibial prosthesis comprises a patellar ligament attachment surface, a lateral collateral ligament attachment surface and a medial collateral ligament attachment surface, and the surface roughness of at least one of the patellar ligament attachment surface, the lateral collateral ligament attachment surface and the medial collateral ligament attachment surface is less than or equal to a preset value. The tibial prosthesis has the advantages of small friction, low wear, no inflammation and pain, significantly reduced postoperative pain and discomfort, facilitated recovery of the patient, effectively maintained stability and function of the knee joint, long service life and the like.

The application provides a tibial prosthesis, which comprises: a tibial platform comprising a base plate and a mounting table arranged on the lower surface of the base plate; an extension rod comprising a rod body and a cone table arranged on the upper end of the rod body, the mounting table is provided with a tapered hole, the cone table is arranged in the tapered hole and matched with the tapered surface of the tapered hole, the cross-sectional size of the tapered hole and the cross-sectional size of the cone table are gradually reduced in the upward direction; a ring-shaped prosthesis is arranged outside the mounting table and the extension rod, the ring-shaped prosthesis and the extension rod are screw-threaded, when the ring-shaped prosthesis rotates forward relative to the extension rod, the ring-shaped prosthesis moves upward relative to the extension rod, and the upper end of the ring-shaped prosthesis can abut against the base plate; a locking structure can limit the reverse rotation of the ring-shaped prosthesis relative to the extension rod when the upper end of the ring-shaped prosthesis abuts against the base plate. Through the technical scheme provided in the application, the problem of poor stability of the tibial prosthesis in the related art can be solved.

The application provides a bionic total ankle joint replacement prosthesis, and belongs to the technical field of medical devices. The bionic total ankle joint replacement prosthesis comprises a talus prosthesis, a tibia prosthesis and a sliding liner arranged between the talus prosthesis and the tibia prosthesis, and the tibia prosthesis is provided with a second reinforcing component fixed with the tibia and the sliding liner. The top of the tibia prosthesis is provided with a curved groove. The top of the talus prosthesis is movably connected with the bottom of the sliding liner, and the talus prosthesis is fixed on the talus. The bionic total ankle joint replacement prosthesis simulates the natural structure of the human ankle joint, helps to restore the normal movement function of the joint, makes the joint movement more flexible and natural, forms multidirectional movement in front and back, left and right and other directions, realizes the functions of varus, valgus, internal rotation, external rotation and movement in other directions of the whole bionic total ankle joint replacement prosthesis, improves the movement range of the whole bionic total ankle joint replacement prosthesis, forms multidirectional bionic functions, and meets the diversified needs of patients in daily life.

The utility model discloses a metal 3D printing porous bone induction structure tibial prosthesis, which comprises a diaphysis prosthesis, a bone fracture plate and an intramedullary nail, the diaphysis prosthesis is designed according to the anatomical form of the focus part of a patient, the diaphysis prosthesis comprises a solid framework and a porous structure, and a cavity is arranged in the diaphysis prosthesis; the at least two bone fracture plates are connected to the two ends of the diaphysis prosthesis in the tibia direction respectively, and the at least two bone fracture plates are connected with the tibia near end and the tibia far end through screws respectively. The tibia near end comprises a first medullary cavity, the tibia far end comprises a second medullary cavity, the intramedullary nail penetrates through the first medullary cavity, the cavity and the second medullary cavity, and the two ends of the intramedullary nail are connected with the tibia near end and the tibia far end through screws respectively. The utility model can solve the problems of incapability of realizing rapid healing, poor initial stability and poor long-term stability in the existing bone defect reconstruction.

The invention discloses a tibial prosthesis and a knee joint prosthesis with the tibial prosthesis. The tibial prosthesis comprises a patellar ligament attachment surface, a lateral collateral ligament attachment surface and a medial collateral ligament attachment surface, and the surface roughness of at least one of the patellar ligament attachment surface, the lateral collateral ligament attachment surface and the medial collateral ligament attachment surface is smaller than or equal to a preset value. The tibia prosthesis has the advantages of being small in friction, low in abrasion, free of inflammatory response and pain, capable of remarkably reducing postoperative pain and discomfort, beneficial to recovery of patients, capable of effectively maintaining stability and functions of knee joints, long in service life and the like.

The utility model provides a single-condyle tibial prosthesis grinding tool, and belongs to the technical field of medical instrument machining. The utility model provides a single-condyle tibia prosthesis grinding tool which comprises a tool body, an installation position used for installing a single-condyle tibia prosthesis is arranged on the tool body, a single-condyle tibia prosthesis main board is arranged on the installation position, and an installation groove used for installing a single-condyle tibia prosthesis bottom board is formed in the installation position. And a mounting hole matched with the mounting rod is formed in the tool main body. According to the grinding tool for the unicompartmental tibia prosthesis, the tool body is installed on the installation rod, the tool body is arranged on the grinding device through the installation rod, the installation position is arranged on the tool body, the bottom plate of the unicompartmental tibia prosthesis is embedded into the installation groove in the installation position, the fixing stability is improved, and the grinding efficiency is improved.

The present invention provides a tibial prosthesis structure for knee joint surgery. The tibial prosthesis structure includes: a tibial body; a repair prosthesis for filling a defect site at the metaphysis of the tibial body. The repair prosthesis includes a first patch assembly and a second patch assembly, and the first patch assembly is arranged to be position-adjustable relative to the second patch assembly, so as to fill an inclusive defect site at the metaphysis of the knee joint by changing the relative positional relationship between the first patch assembly and the second patch assembly. The tibial prosthesis structure of the present invention solves the problem that it is difficult for the specifications of the existing filling prosthesis to match the tibial defect site.

The utility model relates to the technical field of orthopedic medical instruments, and discloses a tibial prosthesis structure. Comprising a tibia prosthesis and a medullary cavity insertion section which are detachably connected, a first groove is formed in the outer side wall of the tibia prosthesis, a third groove is formed in the outer side wall of the medullary cavity insertion section, and the first groove and the third groove are sequentially communicated to form a long groove used for placing an implanted bone. The long groove is a bone grafting space extending in the length direction of the tibia prosthesis structure, the bone grafting material is contained in the long groove, on one hand, the bone grafting part can be prevented from protruding after an operation, and the occurrence rate of wound complications is reduced; on the other hand, healing of the patellar ligament and the bone grafting part is facilitated, the patellar ligament fracture risk is reduced, and the knee joint function of a patient is improved.

The invention discloses a preparation method of a biological tibial prosthesis, and relates to the technical field of prosthesis preparation. The preparation method of the biological tibial prosthesis comprises the following steps: acquiring image data of a tibial plateau of a patient; establishing a platform model according to the image data; acquiring bone mineral density data of a plurality of unit areas on the platform model; based on the multiple pieces of bone mineral density data, bone nail parameters of the multiple unit areas are determined respectively, and the bone nail parameters comprise the number of bone nails; and preparing the tibial prosthesis according to the platform model and the plurality of bone nail parameters. According to the preparation method of the biological tibial prosthesis, the tibial prosthesis adapting to the bone density distribution condition of a tibial plateau of a patient can be prepared, and the stability of the tibial prosthesis in the early stage of implantation is improved.

A femoral component and a tibial component are respectively configured to exclusively couple with the distal end of a femur bearing a femoral prosthesis and with the proximal end of a tibia bearing a tibial prosthesis. The femoral component has a distal portion configured to face the distal end of the femur, bearing distal positioning holes facing a distal region of the femoral prosthesis. A frontal portion extends on the continuation of the distal portion and has a first abutment area operating against the femur bone part and a second area facing a frontal region of the femoral prosthesis. The frontal portion has at least two guide holes at the first abutment area, and at least two frontal positioning holes at the second area.

An embodiment of the present invention provides a unicompartmental knee prosthesis. The unicompartmental knee prosthesis includes a liner and a tibial prosthesis. The liner has a first convex surface along its thickness direction; the tibial prosthesis includes a main body, and the main body is provided with a first concave surface on the side facing the liner. The first concave surface and the first convex surface of the liner can be rotatably and slidably matched. The thickness of the inner front edge of the main body is h1; the thickness of the outer edge of the main body is h2, and the thickness of the inner rear edge of the main body is h3, wherein h1>h2>h3. Therefore, the unicompartmental knee prosthesis of the embodiment of the present invention has the advantages of high installation efficiency and reduced risk of product dislocation.

A tibial prosthesis that includes a baseplate (100) and a tibial keel (108). The baseplate including: a distal surface (104) sized and shaped to substantially cover a proximal resected surface of a tibia; a proximal surface (102) opposite the distal surface, the proximal surface having a lateral compartment (116) and a medial compartment (114) opposite the lateral compartment; a periphery (106) extending between the distal surface and the proximal surface; a first pocket (124) formed in the baseplate and recessed from the distal surface, wherein the first pocket is configured to receive a bone cement therein; a second pocket (126) formed in the baseplate and recessed from the first pocket, wherein the second pocket is configured to receive a portion of the bone cement. The tibial keel extending distally from the distal surface to define a longitudinal tibial keel axis (S1).

The present application relates to a tibial prosthesis configured for implantation onto a tibia, the tibial prosthesis comprising: a distal side; a proximal side opposite the distal side; a bore defining an opening on the proximal side; an anterior engagement member on the proximal side; and a rear engagement member on the proximal side, the rear engagement member being located rearward of the front engagement member. The invention also relates to a method. The present application also relates to a prosthetic knee system comprising: a tibial prosthesis comprising: a distal side; a proximal side opposite the distal side; a bore defining an opening on the proximal side; an anterior engagement member on the proximal side; and a rearward engagement member on the proximal side, the rearward engagement member rearward of the forward engagement member; and a tibial bearing configured to couple with the tibial prosthesis, the tibial bearing comprising: a first complementary engagement feature configured to engage with the anterior engagement member of the tibial prosthesis; and a second complementary engagement feature configured to engage with a posterior engagement member of the tibial prosthesis.

An orthopedic assembly includes a tibial prosthesis that includes a body that defines an anterior side and a posterior side. The body further incudes a recess in the anterior side of the joint prosthesis and a plurality of openings that extend through the body from the anterior side to the posterior side thereof. At least a first and second opening of the openings are positioned at respective lateral and medial sides of a longitudinal axis of the tibial prosthesis. A modular insert is positioned within the recess of the body such that at least a portion of the modular insert is positioned between the openings of the body. The modular insert is formed separately from the tibial prosthesis and has a porous outer surface to promote tissue ingrowth.

The invention provides a bionic total ankle joint replacement prosthesis, and belongs to the technical field of medical instruments. Comprising a talus prosthesis, a tibia prosthesis and a sliding liner arranged between the talus prosthesis and the tibia prosthesis, a second reinforcing assembly fixed with a tibia and the sliding liner is arranged on the tibia prosthesis, a cambered surface groove is formed in the top of the tibia prosthesis, and the top of the talus prosthesis is movably matched with the bottom of the sliding liner. According to the ankle joint rehabilitation device, the natural structure of the ankle joint of the human body is simulated, the normal movement function of the joint can be recovered, the joint movement is more flexible and natural, and multi-direction movement in the front-back direction, the left-right direction and other directions is formed; the functions of introversion, eversion, inward rotation, outward rotation and movement in other directions of the whole bionic total ankle joint replacement prosthesis are achieved, the movement range of the whole bionic total ankle joint replacement prosthesis is widened, the multidirectional bionic function is achieved, and the diversified requirements of daily life of patients are met.

A tibial prosthesis system for knee arthroscopy may include a tibial tray having an anterior portion, a posterior portion, a bone facing surface, a joint facing surface, and a central aperture. The tibial prosthesis system may also include a clip configured to be slidably received in the central aperture. The posterior portion may include a posterior notch. The central aperture may extend posteriorly from the anterior portion, and from the bone facing surface to the joint facing surface. At least a portion of the joint facing surface may extend between the central aperture and the posterior notch.

Embodiments of the present application are applicable to the technical field of computer-aided medical treatment and surgical planning, and provide a single-condyle mobile platform surgical planning method and a computer device. The method comprises: determining a plurality of prostheses to be planned, the prostheses comprising femoral prostheses and tibial prostheses, and the femoral prostheses all being spherical prostheses; placing the femoral prostheses with the distal end point of a pre-constructed femur three-dimensional model as the center, and adjusting the femoral prostheses to target femur positions; calculating femur section coverage rates of the femoral prostheses at the target femur positions; determining a target femoral prosthesis from the plurality of femoral prostheses according to the femur section coverage rates; determining a target tibial prosthesis from the plurality of tibial prostheses, and performing preoperative planning of a single-condyle mobile platform knee joint replacement surgery based on the target tibial prosthesis and the target femoral prosthesis. By using the above method, preoperative prosthesis planning can be performed for single-condyle knee joint surgery of a mobile platform.

ORTHOPEDIC LEG ALIGNMENT SYSTEM AND METHOD Abstract An orthopedic measurement system is disclosed to measure leg alignment. The measurement system includes a tri-axial gyroscope con­ figured to measure movement of a leg. The gyroscope is coupled to a tibia of the leg. For example, the gyroscope can be placed in an insert or tibial pros - thetic component that couples to the tibia. The gyroscope is used to measure alignment relative to the mechanical axis of the leg. The leg alignment measurement is performed by putting the leg through a first leg movement and a second leg movement. The gyroscope outputs angular velocities on the axes the sensor is rotated about. The gyroscope is coupled to a computer that calculates the alignment of the leg relative to the mechanical axis from the gyro - scope measurement data. ORTHOPEDIC LEG ALIGNMENT SYSTEM AND METHOD Abstract An orthopedic measurement system is disclosed to measure leg alignment. The measurement system includes a tri-axial gyroscope con- figured to measure movement of a leg. The gyroscope is coupled to a tibia of the leg. For example, the gyroscope can be placed in an insert or tibial pros - thetic component that couples to the tibia. The gyroscope is used to measure alignment relative to the mechanical axis of the leg. The leg alignment measurement is performed by putting the leg through a first leg movement and a second leg movement. The gyroscope outputs angular velocities on the axes the sensor is rotated about. The gyroscope is coupled to a computer that calculates the alignment of the leg relative to the mechanical axis from the gyro - scope measurement data.20 25 20 12 68 21 F eb 2 02 5 O R T H O P E D I C L E G A L I G N M E N T S Y S T E M A N D M E T H O D A b s t r a c t 2 0 2 5 2 0 1 2 6 8 2 1 F e b 2 0 2 5