375 results about "Cotyloid Cavity" patented technology

The invention discloses a calculation method and system for the optimal placement orientation of an acetabular cup in a total hip joint operation, and belongs to the field of surgical instruments. The calculation method comprises the steps that CT data of a patient is obtained, a three-dimensional model is constructed, point locations in the three-dimensional model are recognized, a three-dimensional coordinate system is established according to a pelvis mark point and a femoral head rotation center point, and the optimal placement orientation of the acetabular cup is calculated; and determining the initial position of femoral motion according to the femoral head rotation center point and the femoral mark point. And drawing a space femoral neck movement range according to the femoral form and a preset hip joint movement range. The centroid of the curved surface is calculated based on the space femoral neck movement range, the rotation center point of the femoral head serves as the starting point and extends towards the centroid to form a ray, and the orientation of the ray in three-dimensional coordinates serves as the optimal placement orientation of the acetabular cup. According to the method, the individualized thighbone shape and the joint movement range of a patient are considered, the optimal acetabulum orientation is given according to different prostheses, and a definite operation target and guidance are given to an operator, so that the dislocation risk after hip replacement is reduced, and the acetabular cup placement reliability is greatly improved.

The invention discloses a hip joint CT image segmentation method based on an improved nnUNet model, and the method comprises the steps: making a data set containing a hip joint CT image and a corresponding expert annotation segmentation mask through a public hip joint CT image data set, and carrying out the preprocessing of the data set, dividing the preprocessed data set to obtain a training set, a verification set and a test set; the training set is input into an improved nnUNet model for training, a model with the optimal performance is obtained, and improvement comprises the steps that a convolution attention module is introduced into jump connection between an encoder and a decoder, and meanwhile an original loss function is replaced with Hausdorff distance loss; and deploying the optimal model to a reasoning environment, reasoning the test image, and outputting a segmentation mask containing the thighbone and acetabulum structure. According to the method, the recognition capability of the complex structure area is improved while high precision is kept, and the method has good universality and practical value.

The invention relates to the technical field of medical instruments, and discloses an angle-adjustable artificial hip joint prosthesis structure which comprises a thighbone connecting assembly, an acetabulum connecting assembly and a movable part movably connected between the thighbone connecting assembly and the acetabulum connecting assembly. The thighbone connecting assembly comprises a first connecting unit fixedly connected with the movable part, a thighbone stem detachably connected to the lower end of the first connecting unit, and a connecting screw fixedly connected to the upper end of the thighbone stem and in threaded connection with the first connecting unit. The acetabulum connecting assembly comprises a second connecting unit fixedly connected with the movable part and an acetabulum fixedly connected to the second connecting unit. Stable rotating connection is achieved through the double-shaft moving part, and a traditional easily-abraded spherical surface structure is replaced; the locking assembly is matched to realize personalized angle adjustment and locking; the femoral stem can be detached and replaced, and adaptability is improved; the surface composite coating promotes osseointegration and improves biocompatibility, the overall structure stability is high, adaptability is high, and postoperative recovery is fast.

The present invention relates to an external guiding frame for a percutaneous internal fixation and strengthening intramedullary nail around the acetabulum, belonging to the field of orthopedic medical devices. It includes a universal guiding frame, which consists of an anterior guiding frame and a posterior guiding frame, respectively applicable to the supine and prone positions of the patient. Each universal guiding frame includes an arc-shaped component, which includes a left arc-shaped guide plate, a middle guide plate, and a right arc-shaped guide plate. The two ends of the middle guide plate are detachably connected to the left arc-shaped guide plate and the right arc-shaped guide plate respectively to form the arc-shaped universal guiding frame; a cross-column nail catheter and an anterior column nail catheter are arranged on the left arc-shaped guide plate or the right arc-shaped guide plate; at least one arc-shaped rod is connected to the middle plate, and a posterior column nail catheter is fixed at the end of the arc-shaped rod; when the universal guiding frame is set on the patient, the cross-column nail catheter, the posterior column nail catheter, and the anterior column nail catheter are respectively opposite to the direction between the anterior superior iliac spine and the anterior inferior iliac spine around the patient's pelvis, the ischial tuberosity of the buttocks, and the pubic upper limb of the acetabular apex.

Systems and methods for real-time navigation of reaming of an acetabulum are disclosed. A first tracking element is interfaced to a reamer. A second tracking element is interfaced at or near the acetabulum. The first tracking element can be interfaced to an outer casing surrounding a portion of the shaft of the reamer. A depth and a tilt angle of the reamer with respect to the acetabulum are determined, based on a location of the first and second tracking elements. Based on a surgical plan, the depth and the tilt angle, the volume of removed bone from the acetabulum can also be determined.

The invention provides a femoral head necrosis recognition system and method based on deep learning, and the method comprises the steps: obtaining a multi-mode magnetic resonance image of a hip joint of an examined person, and the multi-mode magnetic resonance image comprises a magnetic resonance image formed by a plurality of magnetic resonance scanning sequences; loading a pre-trained image segmentation model to identify a femoral head and an acetabulum in the hip joint of the multi-modal magnetic resonance image, and segmenting the femoral head and the acetabulum to obtain a femoral head segmentation image of the magnetic resonance image of each scanning sequence; performing enhancement processing on each femoral head segmentation image; extracting femoral head feature data of each femoral head segmentation image type and forming splicing feature data; and loading a pre-trained necrosis recognition model to process the spliced feature data to obtain femoral head necrosis recognition results under each magnetic resonance scanning sequence and output the femoral head necrosis recognition results. The diagnosis accuracy can be improved, and the misdiagnosis rate is reduced.

The invention relates to a hip joint prosthesis. The hip joint prosthesis comprises an interstitial acetabular prosthesis and a femoral head reconstruction device. The interstitial acetabular prosthesis is stably connected with a pelvic acetabular fossa through the interstitial acetabular cup, the fixing screw and the interstitial acetabular lining, and adaptability and stability are enhanced through multiple designs such as petal openings and damping parts; the femoral head reconstruction device comprises a joint friction surface prosthesis and a bone ingrowth supporting cage frame, and reconstruction and stable supporting of the femoral head are achieved. According to the hip joint prosthesis, the technical effects of improving the stability and durability of the hip joint prosthesis, reducing postoperative discomfort of a patient and promoting bone tissue growth are achieved.

The invention provides a hip joint prosthesis which comprises an acetabular cup provided with a containing cavity, the acetabular cup is provided with a first magnetic part and a limiting ring groove, and the limiting ring groove is communicated with the containing cavity; the ball head is rotatably arranged in the accommodating cavity; the clamping ring is arranged outside the equator part of the ball head in a sleeving mode, the ball head can swing relative to the clamping ring, a second magnetic piece is arranged on the clamping ring, the second magnetic piece is matched with the first magnetic piece in a magnetic attraction mode so that the ball head can be connected with the acetabular cup, at least part of the clamping ring swings in the limiting ring groove along with the ball head, and the clamping ring can be matched with the side wall of the limiting ring groove in a limiting mode; and the femoral stem is fixedly connected with the ball head. According to the technical scheme, the problem that in the prior art, the movement range of a hip joint prosthesis is insufficient, and the joint flexibility is affected is effectively solved.

A hip implant system includes an artificial acetabular cup and an artificial acetabular liner. The liner includes or consists of a metal or an alloy, and is coated at least in sections with a ceramic coating.

The invention discloses a hip joint surgical robot grinding and rubbing detection system and a detection tool thereof, and relates to the technical field of medical instruments. The device comprises a bottom plate and a grinding and rubbing assembly, a hip model assembly is fixedly connected to one side of the top of the bottom plate, an acetabular fossa model assembly is fixedly connected to the other side of the top of the bottom plate, and a tracer support is fixedly connected to the position, located at the rear end of the acetabular fossa model assembly, of the top of the bottom plate. The grinding and rubbing precision can be monitored in real time in the operation process, immediate feedback is provided, an operation team can find and correct errors in the grinding and rubbing process in time, the success rate of the operation is increased, tiny grinding and rubbing errors can be detected by accurately measuring the ball center position of the grinding and rubbing contour, it is ensured that the surgical robot achieves high-precision grinding and rubbing operation, and the working efficiency is improved. Multiple times of X-ray or CT scanning needed by traditional postoperative imaging evaluation are avoided, the radiation risk of a patient is reduced, the grinding and rubbing precision detection process is simplified, the operation time is shortened, and the operation complexity is reduced.

The invention discloses a data processing method and device for a prosthesis fixing nail, a storage medium and electronic equipment. The method comprises the following steps: performing three-dimensional reconstruction according to medical image data of a target object and an acetabular cup prosthesis to obtain an initial three-dimensional model; according to a current nail hole of the acetabular cup prosthesis in the initial three-dimensional model, generating a first implantation parameter of a first fixing nail; according to the first implantation parameter, performing simulated implantation operation in the initial three-dimensional model to obtain a simulated three-dimensional model; and performing safety evaluation on the simulated three-dimensional model, and determining target implantation parameters of the fixing nails of the acetabular cup prosthesis according to the first implantation parameters under the condition that a safety evaluation result represents that the safety evaluation is passed. According to the method and the device, the problem that the accuracy of determining the implanting position and direction of the fixing nail is relatively low due to the fact that the implanting position and direction of the fixing nail of the acetabular cup are determined depending on artificial experience in related technologies is solved.

The invention provides a method for determining special pelvic acetabular cup prosthesis information based on mirror image reconstruction, which comprises the steps of CT equipment image performance detection, pelvic three-dimensional model reconstruction and special pelvic acetabular cup prosthesis information determination, and ensures the performance stability of CT equipment by acquiring and analyzing the operation data of the CT equipment. The method has the advantages that two-dimensional image blurring or distortion caused by poor performance of CT (computed tomography) equipment is avoided, high-quality pelvis two-dimensional images are acquired, the definition of the two-dimensional images can be guaranteed by analyzing and preprocessing the pelvis two-dimensional images, a reliable basis is provided for subsequent three-dimensional reconstruction and prosthesis information determination, and the method is suitable for popularization and application. According to the method, the accuracy and authenticity of the three-dimensional model are ensured, the accurate three-dimensional pelvis model is generated through three-dimensional reconstruction of the two-dimensional pelvis image, the structure and form of the pelvis can be displayed more visually, and a basis is provided for a subsequent special pelvis acetabular cup prosthesis information determination method.

A prosthetic acetabular liner including a wall that extends from an apex portion to a circumferential rim portion, the wall having: a convex outer surface; a threaded spigot extending outwardly from the apex portion; a concave inner bearing surface; and an opening surrounded by the circumferential rim portion. The liner is rotatably insertable into an acetabular outer shell having a corresponding threaded apical hole, and rotation of the liner in the shell causes the threaded spigot to engage the threaded apical hole and thereby draw the liner into the shell.

The acetabular cup removal device for artificial hip joints according to an embodiment of the present invention comprises a main shaft and a cutter section that cuts the acetabular region while being rotated by the main shaft. The cutter section includes a cutter tilting unit capable of tilting along the acetabular region around an imaginary tilting axis, a cutter mounting unit coupled to the cutter tilting unit in a manner that allows relative sliding toward or away from the imaginary tilting axis, and a cutter detachably mounted on the cutter mounting unit. The cutter tilting unit comprises a first through-hole penetrating along the imaginary tilting axis, a connecting bar fixed at both ends to the cutter mounting unit, and a leaf spring fixed at both ends to the connecting bar with a central portion between the two ends.

Devices for treating a bone and methods of inserting such devices into a bone are disclosed. A device for treating a bone may include a flexible tube, a stiffening mechanism and an actuator. The flexible tube has a distal end and a proximal end. The stiffening mechanism within the flexible tube is configured to cause the flexible tube to become rigid. The actuator is configured to cause the stiffening mechanism to cause the flexible tube to become rigid in response to the actuator being actuated.

The invention provides an acetabulum patch prosthesis, which comprises a base part, a first force bearing concave surface, a second force bearing concave surface and a connecting part, the adjusting part is adjustably arranged on the end wall of the base part, and a second force bearing concave surface corresponding to the first force bearing concave surface is arranged on the side wall of the adjusting part; and the adjusting structure is arranged between the base part and the adjusting part so as to adjust the distance between the base part and the adjusting part. According to the technical scheme, the problem that the universality of the acetabular patch prosthesis in the related technology is poor is effectively solved.

An implant system has an acetabular cup with an interior bearing surface with a central bearing zone that is smooth and devoid of holes or indentations. The cup also has a peripheral bearing zone that contains insertion tool engagement holes. The engagement holes are only present in the peripheral zone and have specific shapes and dimensions. The system includes an insertion tool with retractable interlocks that fit within the engagement holes to position the cup during implantation. The central bearing zone bears the main forces during articulation, while the peripheral zone withstands minor forces. The location of the engagement holes has a negligible effect on the cup's performance. The cup can be made of ceramic and may have a coated exterior surface for osseointegration.

The invention discloses a set instrument for acetabulum tenon-and-mortise structural bone grafting and application, relates to the field of orthopedic surgical instruments, adopts a cylindrical ring file, a wedge-shaped angle file, a hollow trephine and a wedge-shaped osteotomy guide plate as the set instrument for acetabulum tenon-and-mortise structural bone grafting, and introduces a tenon-and-mortise structure mechanical embedding principle of Chinese traditional woodworking science into the field of acetabulum reconstruction. According to the acetabular cup prosthesis, a mortise and tenon structural bone grafting of an autologous femoral head is adopted, a Mortia and Tenon Bone Grafting technology (Mortia and Tenon Bone Grafting, MTBG) is innovatively put forward, an acetabular bone groove and a bone grafting block which are matched are prepared in a standardized mode, acetabular defects are embedded and filled through the accurately matched bone block, and the coverage rate and initial stability of the acetabular cup prosthesis are remarkably increased, and the bone fusion prospect of the acetabular cup prosthesis is remarkably improved; the hip joint function of the patient is obviously improved, pain is relieved, the walking ability is improved, and the life quality is improved; the invention provides a reliable and efficient new structural bone grafting technology, and the safety and long-term effect of DDH acetabulum reconstruction can be improved.

An acetabular cub system is configured to be secured to a pelvis and may include an acetabular cup and a plurality of bone fasteners. The acetabular cup may include a bone engaging surface and an articulating surface, as well as a plurality of lobed fastener apertures extending from a first opening at the articulating surface to a second opening at the bone engaging surface. The plurality of bone fasteners may be insertable through the lobed fastener apertures to secure the acetabular cup to the pelvis. Each of the plurality of lobed fastener apertures may include a central aperture configured to receive a first bone fastener of the plurality of bone fasteners and one or more aperture lobes intersecting with the central aperture configured to receive a second bone fastener of the plurality of bone fasteners. The central aperture may be larger than the one or more aperture lobes.

A hip joint navigation system is provided that includes a base having at least one channel disposed therethrough for receiving a pin for mounting the base to the pelvis. A mount feature is disposed on a top surface. A registration jig is configured to couple with the base and to engage anatomical landmarks. In some aspects, a patient specific jig system for hip replacement is provided including an engagement surface formed to closely mate to acetabular bone contours of a specific patient and a registration feature configured to be in a pre-determined orientation relative to an acetabulum the patient when the jig is coupled with acetabular bone contours of the specific patient. In other aspects, methods of using the systems are provided.

The invention relates to a hip joint diagnosis index automatic quantitative calculation method based on three-dimensional equation expression. The method comprises the following steps: step 1, processing a CT image through a boundary-based contour line extraction method to obtain a three-dimensional hip joint point cloud; 2, establishing a three-dimensional equation expression of the hip joint, and calculating diagnosis indexes, namely an acetabulum index and a femoral head protrusion index; step 3, extracting a human body action sequence from the motion video by using a rapid monocular three-dimensional body action capture method; and 4, calculating five key points and the like through the three-dimensional coordinates of the pelvic bone center, the femoral head center, the femoral neck center and the lesser trochanter vertex. According to the method, an integrated auxiliary diagnosis motion model is constructed, the auxiliary diagnosis motion model avoids errors caused by distortion of muscles and skin in motion based on rigid characteristics of hip joint bones, two FAI auxiliary three-dimensional diagnosis indexes are provided based on morphological characteristics, errors caused by view angle changes in a CT image are avoided, and the accuracy of diagnosis is improved. And a reliable hip joint impact diagnosis basis is provided.

An acetabular bone defect filling block design method based on a force conduction path comprises the steps that a mechanical conduction target path is determined, specifically, the stress condition of a hip joint in a gait cycle is simulated on the basis of a three-dimensional model of a pelvis of a patient, a bone defect area Vdefect and a three-dimensional model of an implanted supporting bracket which are obtained in advance, and the mechanical conduction target path is determined; determining an expected force flow conduction path from the acetabular cup loading area to the host bone main bearing area; a filling space determining step: calculating a residual defect space Vremain formed after the support is implanted; a filling block main body generation step: taking the residual defect space Vremain as a design boundary, taking following of the expected force flow conduction path and realization of matching of the structural rigidity and the host bone as an optimization target, generating a filling block main body three-dimensional model with an internal support truss through a topological optimization algorithm, and steering a strong gluteus column by depending on an incomplete acetabular ring, and a fixed foundation which cannot be shaken is provided. An intelligent structure with the optimal mechanical property is generated by converting empirical shape matching into simulation driving generation type design.

A hip joint navigation system is provided that includes a base having at least one channel disposed therethrough for receiving a pin for mounting the base to the pelvis. A mount feature is disposed on a top surface. A registration jig is configured to couple with the base and to engage anatomical landmarks. In some aspects, a patient specific jig system for hip replacement is provided including an engagement surface formed to closely mate to acetabular bone contours of a specific patient and a registration feature configured to be in a pre-determined orientation relative to an acetabulum the patient when the jig is coupled with acetabular bone contours of the specific patient. In other aspects, methods of using the systems are provided.

The invention provides an orthopaedic implantation post-operation X-ray film simulation method and system based on a preoperative CT image, a medium, a program product and a terminal, and aims to accurately convert and present results of three-dimensional segmentation, key point identification and prosthesis positioning based on preoperative CT into a standard post-operation X-ray film simulation effect conforming to clinical routine. A doctor can intuitively and clearly foresee the form projection and the specific spatial position of selected prostheses including an acetabular cup, a lining, a ball head, a femoral stem and the like on a post-operation standard orthotopic X-ray film and the accurate relative anatomical relation between the prostheses and key bony markers of the pelvis and the femur in the pre-operation planning stage. By providing an intuitive and quantitative post-operation X-ray film simulation effect, a doctor is effectively assisted in selecting an optimal operation scheme and adjusting setting of parameters such as the size, the position and the angle of an implant, the predictability and the accuracy of operation planning are improved, and dependence on pure experience is reduced.

The utility model discloses an acetabular cup taking-out device for a hip joint revision operation, and belongs to the technical field of medical instruments. Comprising a grab handle, a power input shaft and an output shaft are rotationally arranged on the two sides of the grab handle respectively and fixedly connected, a positioning ball capable of rotating along with the output shaft is arranged at the end of the output shaft, a movable arc-shaped blade is detachably arranged on the outer side of the positioning ball, and the arc-shaped blade can turn to the bottom of the positioning ball. A blade adjusting assembly capable of driving the arc-shaped blade to move is arranged on the output shaft. The acetabular cup taking-out device for the hip joint revision operation is simple in structure and convenient to operate, the complex hip joint revision operation is simplified, accurate cutting with a predictable result can be conducted by designing the arc-shaped blade with the replaceable size, meanwhile, bone loss can be reduced to the maximum extent, the operation effect is improved, and the hip joint revision operation efficiency is improved. The risk of acetabular fracture in the operation is also reduced, and the practicability is high.

Methods include tracking one or more of a leg length or an offset in a patient during a total hip arthroplasty (THA) procedure performed using a navigated surgical system, with an expandable trial femoral assembly. Certain methods include registering a pelvis of the patient to the navigated surgical system; and in various embodiments measuring a leg length or registering a femur to the navigated surgical system. An expandable trial femoral assembly is affixed to a prepared and broached femur of the patient; and the expandable trial femoral assembly is reduced into an acetabular prosthesis. A navigated driver may then be used to adjust an expansion extent of the expandable trial femoral assembly. The navigated surgical system may measure the leg length and the offset in the patient based on the movement of a reference element of the femur relative to a reference element of the pelvis.

Methods provide computer-navigation assisted total hip arthroplasty (THA) procedures. Such procedures include the use of a navigated instrument, e.g., a navigated reamer construct or a navigated inserter construct to prepare the acetabulum and insert an acetabular shell, a camera tracking system adapted to track a pose of the navigated inserter or reamer construct relative to the patient in use, and a computer platform adapted to receive pose tracking information and generate and display navigational guidance for the user.

The invention discloses a method and a device for calculating an acetabular cup bone fitting rate, computer equipment and a storage medium. The method for calculating the acetabular cup bone fitting rate comprises the following steps: acquiring a pelvis model and an acetabular cup model; extracting an effective bone binding surface of the acetabular cup model; performing Boolean operation on the effective bone binding surface and the pelvis model to obtain an intersection set and a difference set of the effective bone binding surface relative to the pelvis model; and based on the intersection and the difference set, calculating to obtain the bone fitting rate of the effective bone fitting surface relative to the pelvis model. According to the method for calculating the joint rate of the acetabular cup bone, an objective, accurate and efficient method is provided for evaluation of the joint rate of the acetabular cup bone through geometric model reconstruction, effective bone joint surface extraction, Boolean operation and quantitative calculation, quantitative calculation of the joint rate of the acetabular cup bone is achieved, and the joint rate of the acetabular cup bone is evaluated. The problems that in a traditional method, doctor experience is relied on, and subjective judgment accuracy is insufficient are solved, and scientificity and accuracy of operation planning are remarkably improved.

An apparatus and method for inserting a femoral broach or femoral stem or acetabular cup into a bone. The apparatus includes at least one closed loop insertion mechanism to provide impacts on the associated handles of the broach, stem, or the acetabular cup; at least one sensor to sense a series of impacts, including impact angle, and to provide real-time feedback of the alignment and / or condition of the bone; and a processor operably connected to the at least one sensor. The processor includes an algorithm that receives the real-time feedback to control the force, frequency, and alignment of the impacts by the at least one closed loop insertion mechanism.