96 results about "Bone surface" patented technology

The invention relates to the technical field of three-dimensional shape modeling and reconstruction, and discloses a bone surface bidirectional three-dimensional reconstruction and editing method and device, computer equipment and a medium, the method comprises the following steps: obtaining a plurality of multi-modal facial skull three-dimensional data, and obtaining a three-dimensional facial grid and a three-dimensional skull grid based on the multi-modal facial skull three-dimensional data, then, a dense ray matching technology of face-skull topological consistent registration is adopted to obtain a dense control point corresponding relation and a topological consistent face grid; based on a preset face-skull structure mapping relation, mapping the face grid and the three-dimensional skull grid which are topologically consistent, and establishing a dense tissue thickness vector field; on the basis of the dense control points and the dense tissue thickness vector field, a bone surface-tissue joint deformable model is constructed to conduct bone surface bidirectional three-dimensional reconstruction, finally bone surface bidirectional three-dimensional editing is conducted on the basis of a bone surface bidirectional three-dimensional reconstruction result, and the precision and individuation level of three-dimensional bone surface reconstruction are remarkably improved.

The invention relates to an artificial periosteum suitable for a complex bone surface. The artificial periosteum is an integrated single-layer membrane. The artificial periosteum is provided with an anti-adhesion area, a directional pore channel structure area and a bone contact area which are sequentially distributed in the thickness direction. The directional pore channels are sequentially filled with composite hydrogel for filling bone surface pores and promoting bone repair and bonding gel for bonding bone surfaces in the extending direction of the directional pore channels; an expanding agent and prestretching memory polymer fibers are dispersed in a matrix of the artificial periosteum; the expanding agent is enriched in the matrix of the directional pore channel structure area and the bone contact area and is used for driving the composite hydrogel to leave the directional pore channel so as to seal bone surface gaps or cracks; and the pre-stretched memory polymer fibers are enriched in the matrix of the anti-adhesion area and are used for limiting the expansion direction of the expanding agent. The artificial periosteum can solve the technical problems that in the prior art, the attaching effect of the artificial periosteum on the complex bone surface is poor, and the long-term reliability is poor.

A suture button system for fixing a syndesmotic injury comprises a flexible fixation implant and an inserter device used to deploy the implant across bones. The flexible fixation implant typically comprises a flexible connector and two suture buttons which interface with the bone surface or a bone plate or washer. The flexible connector comprises a plurality of suture strands. The buttons typically have a feature which allows them to interface with an instrument used to deploy the implant across the two bones. The inserter device is configured to interface with the flexible fixation implant and to position it across bones through a pre-drilled bone tunnel. The inserter device may comprise an cannulated insertion rod and a handle.

An apparatus includes a fixation portion configured to be affixed to a bone surface within a recipient's body. The apparatus further includes a mounting portion connected to the fixation portion, the mounting portion configured to hold a component within the recipient's body. The mounting portion includes a collar configured to extend at least partially around the component and a reservoir configured to receive an adhesive material within a predetermined volume at least partially bounded by an inner surface of the collar and an outer surface of the component.

Systems and methods for bone surface geometry generation include a computing device. The computing device projects first geometry data indicative of a first bone contact surface of a first bone of a patient to a coordinate space of a second bone of the patient to generate a projected geometry. The second bone includes a second bone contact surface engaged with the first bone contact surface. The computing device also maps the projected geometry to a plurality of poses within a range of motion of the first bone relative to the second bone using position data indicative of relative positions of the first bone and the second bone at the plurality of poses within the range of motion. The computing device also selects an intersecting geometry from the mapped projected geometries to generate second geometry data indicative of a second bone contact surface.

The present invention relates to a surgical spacer device (100) for a joint, comprising a substantially cylindrical or truncated-cone-shaped main body (101), internally hollow and configured for insertion in a distracted joint (1, 2); the main body (101) comprising: a first terminal surface (102) substantially flat and configured to abut onto a first bone portion (1) of the joint (1, 2); a second terminal surface (103) substantially annular and configured to abut onto a second bone surface (2) of the joint (1, 2) opposite the first bone portion (1), the second terminal surface (103) having a first opening (10) for access to the second bone portion (2); at least one lateral element (104) configured for maintaining a three-dimensional spaced structure between the first terminal surface (102) and the second terminal surface (103), the at least one lateral element (104) defining a second opening (20) configured for allowing a lateral access inside the main body (101) and further an access to the second bone portion (2) through the first opening (10).

The application belongs to the technical field of medical image processing, and particularly relates to a kind of bone fracture block automatic reduction methods based on medical image;Including: obtaining the three-dimensional medical image data and three-dimensional label data after fracture of the object to be processed, and pre-processing the three-dimensional medical image data after fracture;The three-dimensional medical image data after fracture is input into the fracture surface segmentation model trained, and the main bone surface area and fracture block surface area are obtained;Three-dimensional coordinates are extracted and main bone surface point cloud and fracture block surface point cloud are constructed;Iterative closest point registration is carried out on the two kinds, and the cumulative rigid body transformation parameter is obtained;The voxel coordinate set corresponding to the fracture block is determined, and the voxel coordinate set is subjected to spatial transformation using the cumulative rigid body transformation parameter, to obtain the three-dimensional label result after reduction;The application can simultaneously complete the problems of automatic identification of fracture section and automatic solution of fracture block reduction posture, improve the degree of automation, result stability and interpretability of fracture block reduction process.

The utility model discloses an oral implant which comprises a bone surface supporting structure, the appearance of the bone surface supporting structure is attached to an upper jaw alveolar bone surface or a lower jaw alveolar bone surface, and a net-shaped through hole is formed in the bone surface supporting structure and corresponds to the alveolar bone surface; a plurality of base tables protruding out of the surface are arranged on the surface of one side of the bone surface supporting structure, and the base tables are used for fixedly connecting the oral implant with a prosthesis; one end, connected to the bone surface supporting structure, of the abutment is provided with an intraosseous implant implanted into the jaw bone. According to the utility model, the traditional subperiosteal implant is improved, the subperiosteal implant is designed in the area with insufficient bone mass of the jaw bone, and the novel stent-shaped implant is formed by combining the subperiosteal implant with the intraosseous implant in the area with sufficient bone mass of the jaw bone, so that independent bone increment operation is not needed, and the implant can be implanted only by one operation; and the clinical problem that a patient with serious atrophy of the alveolar ridge is difficult to implant and repair is effectively solved.

The invention discloses a femoral neck fracture treatment positioning plate, preparation equipment and a preparation method, the positioning plate comprises a main body plate and an adjustable guide module, the shape of the main body plate is matched with the anatomical form of the outer side bone surface of the proximal femur, and the main body plate is provided with at least one bone nail hole. The individualized main body plate accurately matched with the anatomical form of a patient is introduced, and the adjustable guide modules of various innovative designs are combined, so that the problem that a traditional positioning plate is poor in universality is effectively solved, and anatomical differences and operation requirements of different patients can be perfectly met; a spherical hinge, an offset sliding block-arc-shaped guide rail, an elastic deformation ring, a modularized guide sleeve and other structures are adopted by the guide module, the space angle stepless adjusting function is ensured, meanwhile, the mechanical structure is remarkably simplified, redundant parts are eliminated, high-rigidity and gapless locking is achieved, micro-motion and displacement in an operation are thoroughly avoided, and the operation efficiency is improved. And the accuracy and the reliability of screw placement are greatly improved.

A bone registration method and system for joint replacement surgery, based on a VSF surface in a preoperative coordinate system generated from preoperative bone image data and a source point set SPS in an intraoperative coordinate system generated from point data collected from the patient's actual bone surface during surgery, determines the transformation relationship between the preoperative and intraoperative coordinate systems through initial and precise registration. The method includes: a first step: selecting multiple corresponding point pairs from the source point set SPS and the VSF surface, performing initial registration based on Singular Value Decomposition (SVD), and obtaining the initial transformation matrix; and a second step: performing precise registration based on the initial transformation matrix using the ICP method. Each ICP iteration employs a least-squares optimization method that minimizes the sum of squared distances between each point in the transformed source point set SPS and the corresponding projection points in the projection point set PSPS. The algorithm stops when the error is less than a set value or the number of iterations reaches a set value.

The utility model discloses a bone needle biopsy needle, which relates to the technical field of bone needle biopsy and comprises a handle and a groove arranged at the top of the handle, a sleeve penetrating through the handle is arranged at the bottom of the handle, a needle core and a sampling needle matched with the sleeve are inserted in the sleeve, and an inclined cutting edge is arranged at the bottom of the sleeve. Sampling lines are arranged on the inner wall of the sampling needle, the bottom of the needle core extends to the outer side of the sleeve, a polishing surface is arranged at the tail end of the needle core, the bottom of the needle core is an elliptical sphere, the whole sphere is made of metal with the hardness larger than that of a skeleton, and the polishing surface is arranged on the surface of the sphere. The grinding surface at the bottom of the needle core is ensured to have enough contact area with the bone, the grinding surface at the edge can be ensured to be in contact with the inner wall of a through hole when the needle core extending out of the sleeve is in contact with the through hole in the surface of the bone, and if the needle core cannot penetrate through the through hole, the through hole can be ground through the grinding surface at the tail end by rotating the needle core, so that the shape of the through hole is changed.

The invention relates to a device for bone formation, bone reshaping or healing of bone in dental, oral and maxillofacial applications, specifically in connection with installation of dental implants. The device comprises a sheet structure made of an inert material, wherein the sheet structure has an inner surface intended to be directed towards the bone and an outer surface intended to be directed away from the bone. The geometrical features of the cavity formed between the inner surface of the device and the initial bone surface when the device is installed at the intended location is further used to improve and plan the treatment. The device is customized by means of digital planning based on the initial and the optimal bone volume for the intended treatment. Modifications of the device can be introduced to facilitate a combined installation of dental implants with the device.

The invention relates to the technical field of medical image reconstruction, and discloses a bone joint three-dimensional reconstruction method and system based on deep learning. The method comprises the steps that a bone joint tomography image set is input, and multi-scale density slices and edge contour information are analyzed; deducing the two types of information space structures, and establishing an initial space field containing a bone tissue main body frame and a joint lacuna form; separating articular surface structure details and bone surface texture veins from the initial field; generating a network by using the three-dimensional structure which is obtained through separation and input and is trained to obtain a grid body with anatomical topological connection; and performing curved surface iterative smoothing based on biomechanical characteristics on the grid body, and outputting a final bone joint three-dimensional model.

The present application relates to the field of meat processing, and discloses a beef slaughtering meat deboning device, which comprises a processing support, a supporting plate arranged in the processing support, positioning shafts arranged at both ends of the supporting plate and capable of being displaced relative to the supporting plate, a connecting support plate arranged at the top of the processing support, a plurality of deboning blades arranged at the bottom of the connecting support plate, and two separating blades arranged at the bottom of the deboning blades, wherein the separating blades are rotated and unfolded under the action of a jacking rod after contacting the bone, and are limited to an inverted V-shaped bone-adhering state by limiting arc pieces, so that the stripping force is concentrated at the connection between the meat layer and the bone surface, and the effect of reducing the residual meat on the bone surface is achieved. The second spring, the third spring and the fourth spring provide reset and up-and-down floating conditions, so that the separating blades can adapt to the concave-convex changes of the outer wall of the bone, and the effects of reducing the risk of meat block breaking, meat fiber tearing and bone fragments mixing are achieved.

A fracture fixation system includes an intramedullary nail having a proximal nail hole, wherein an inner surface of the proximal nail hole has a non-circular shape in a plane perpendicular to an axis along which the proximal nail hole extends; a plate having an inner surface for placement against a surface of a bone, the plate defining a proximal plate hole adjacent a proximal end of the plate extending through the plate; and a peg extending along a peg axis and configured for insertion into the proximal nail hole, wherein a body of the peg has an outer surface defining a non-circular shape in a plane perpendicular to the peg axis, the peg further including a lateral end adjacent to the body and configured to engage the proximal plate hole, the lateral end having a reduced cross-section that is smaller than a maximum cross-section of the body of the peg.

The invention discloses a fitting type adjustable gasket device for wedge-shaped high tibia osteotomy with an inner opening. The fitting type adjustable gasket device comprises an upper cover, a floating cover, a double-side different-curve cam, a worm gear-worm transmission pair and a base, the worm gear is driven by rotating the worm, and then the double-side different-curve cams are driven to rotate synchronously. The double-side different-curve cam is unique in design, and the curved surfaces of the cams on the two sides of the double-side different-curve cam have specific curvature radius difference. In the rotation process of the cam, the curvature radius difference is utilized to accurately drive the floating cover to stably lift in the vertical direction, and meanwhile, the floating cover can controllably rotate around a coronal shaft. The combined movement mechanism enables the device to accurately generate the required coronal plane angle beta at one time in the operation. By means of the design, accurate adjustment of the angle is achieved, more importantly, large-area and uniform face-face contact can be effectively promoted to be formed between the osteotomy face and the floating cover, and therefore the supporting stability is remarkably improved, the risk of bone face collapse caused by local stress concentration is thoroughly eliminated, and reliable structural support is provided for postoperative recovery.

A tool mark identification method for analyzing bone surface modifications includes receiving a plurality of known images with known attributes, receiving a plurality of unidentified images with unknown attributes including aberrations, aligning the received plurality of known images to thereby generate a plurality of aligned known images, aligning the received plurality of unidentified images to thereby generate a plurality of aligned unidentified images, training a model using the plurality of aligned known images to thereby form a trained model, and applying the plurality of aligned unidentified images to the trained model, thereby predicting tool marks that generated the aberrations in the unknown attributes.

The utility model relates to the technical field of medical auxiliary devices, and discloses a digital guide plate for a depth-keeping bone finishing technology, which comprises a depth-keeping bone finishing guide plate, a depth-keeping guide column, an occlusion fixing plate and a connecting rod for connecting the depth-keeping bone finishing guide plate and the occlusion fixing plate, the occlusion fixing plate is accurately prepared through 3D printing according to the three-dimensional shape of teeth of a patient, a plurality of grooves are formed in the occlusion fixing plate, and the grooves are matched with the teeth of the patient in shape; at least four guide grooves are formed in the fixed-depth bone finishing guide plate, fixed-depth guide columns matched with the guide grooves are movably arranged in the guide grooves, and a specific bone finishing depth mark is arranged on each fixed-depth guide column; and at least two titanium nail holes are formed in the depth-keeping bone trimming guide plate. The whole abnormal bone surface can be positioned and trimmed by only one pair of guide plates, the depth setting column is guided by the depth setting hole to determine the bone trimming depth, real-time navigation in an operation is not needed, operation time and operation steps are greatly reduced, and operation wounds are reduced.

The invention provides a screw angle measuring, guiding and positioning method for a proximal femur compression steel plate, which is applied to the technical field of orthopedic surgery assistance and comprises the following steps of: constructing a three-dimensional bone morphological model of the proximal femur of a patient before a surgery, simulating different X-ray projection directions and generating a projection of a virtual guide needle on a two-dimensional image; measuring an included angle parameter between a femoral neck axis and a guide pin projection, correcting the included angle parameter into a screw incident angle parameter, further designing a guider shell, a guide hole and a sensor layout based on the angle parameter, performing matched simulation on a three-dimensional bone form model, and evaluating the fitting degree of the guider on the bone surface and the guide hole positioning precision; therefore, accurate reference is provided for preoperative screw placement path planning and intraoperative guider use, quantifiable design and guide control of the incident angle of the screw are achieved, and deviation of screw placement is reduced.

Systems and methods for bone surface geometry generation include a computing device. The computing device projects first geometry data indicative of a first bone-contacting surface of a first bone of a patient to a coordinate space of a second bone of the patient to generate projected geometry. The second bone includes a second bone-contacting surface that interfaces with the first bone-contacting surface. The computing device also maps the projected geometry to a plurality of poses in a range of motion of the first bone relative to the second bone using position data indicative of relative positions of the first bone and the second bone at the plurality of poses in the range of motion. The computing device further selects intersecting geometry from the mapped, projected geometry to generate second geometry data indicative of the second bone-contacting surface.

A bone repositioning device includes a base frame comprising a torus support having a plurality of circular frames. A first armature and a second armature connect to the base frame. The first armature includes a first shaft with a base end and a support end, and a second shaft connected to the first support end. The second armature includes a third shaft with a base end and a support end, and a fourth shaft connected to the second support end. A plurality of dome-shaped pads have a dome side and a contact side configured for attachment to a bone surface. These pads are evenly distributed on the second and fourth shafts, with the shafts passing through the pads. A joint connects the first and second armatures at their respective base ends to the base frame, allowing the armatures three degrees of freedom and movement around the joint.

A method for verifying a bone entry point includes receiving a surgical plan that defines a target bone entry point and a first portion of a bone surface at least partially surrounding the target bone entry point; positioning an imaging device near an identified bone entry point; receiving, from the imaging device, an image of a second portion of the bone surface surrounding the identified bone entry point; comparing at least one feature of the first portion to at least one feature of the second portion to quantify a degree of similarity therebetween; and generating, when the quantified degree of similarity between the first portion and the second portion exceeds a threshold, a confirmation.

The utility model relates to the technical field of medical instruments, and discloses an ultrasonic cutter which comprises a cutter bar and a cutter head. The cutter bar is provided with a hollow channel penetrating through the near end and the far end. The cutter head is connected with the far end of the cutter bar and comprises a cutting portion obliquely extending relative to the cutter bar, the cutting portion is provided with an outer spoon face and an inner spoon face, the outer spoon face is a convex face, the inner spoon face is a concave face, and the hollow channel extends to penetrate through the inner spoon face to form a suction opening. Bone residues on the bone surface can be removed through the inner spoon face, the suction opening and the hollow channel, the cutting effect of the cutting part is guaranteed, and the operation efficiency is improved.

The utility model belongs to the field of medical instruments suitable for orthopedic surgery, and particularly relates to a periosteum distraction device for a skull, which comprises a strip-shaped distraction plate bent in an arc shape, a sleeve and a distraction nail provided with external threads, one end of the distraction plate is provided with a combination hole penetrating through the upper surface and the lower surface, and the combination hole is composed of a groove and a threaded hole; a boss matched with the groove in an inserted mode is arranged on the end face of one end of the sleeve, and the sleeve is inserted into the groove in the convex face direction of the stretching plate. The distraction nail penetrates through the sleeve and then is in threaded connection with the distraction plate, the nail tail of the distraction nail extends to the outside of the sleeve, and the nail head of the distraction nail extends to the concave face side of the distraction plate and is configured to make contact with the bone surface. According to the distraction device, the distraction plate can be driven to rotate integrally by rotating the sleeve through the inserting and matching structure of the groove and the sleeve, flexible adjustment of the position of the distraction plate is achieved, periosteum can be stimulated in a targeted mode, and therefore regeneration of subperiosteal blood vessels can be promoted.

The application discloses a centrifugal sand and stone conveying pump with high wear resistance, and belongs to the technical field of fluid conveying, which comprises a volute, a front end cover, a rear end cover and an impeller, the impeller is arranged in the volute, the shaft surface of the impeller forms a smooth transition flow channel, a plurality of blades are arranged on the impeller along the self axis at intervals, the bone surface of the blade is composed of a plurality of continuous spline curves along the self extension direction, and there is at least one inflection point of the mounting angle of the blade along the arc length variation curve of the bone surface; the front end cover is arranged at the inlet of the volute, and a sealing structure is formed between the inner surface of the front end cover and the volute. In summary, the conveying pump effectively improves the pumping effect of large particle substances in the ore slurry, reduces the risk of blockage, and can better adapt to the high-efficiency conveying demand under complex working conditions through the unique flow channel of the impeller, the blade design and the sealing structure between the front end cover and the volute.

The invention discloses an intelligent recognition method and recognition system for bone marrow puncture positioning points, and relates to the field of puncture positioning. Comprising the following steps: acquiring a pelvis image; determining N anatomical mark points of the target bone surface according to the pelvis image map; fitting a local tangent plane of the target bone surface according to the N anatomical mark points; q advanced safety puncture points are determined on the local tangent plane; calculating Q puncture suitability scores of the Q advanced safety puncture points; classifying the Q puncture suitability scores into K score clusters, and constructing K score dimension two-tuples based on the score clusters; a body surface drop point of actual puncture is obtained; according to the method, it is ensured that the self score of the puncture point is high, and the score performance of the surrounding puncture points is stable; and if the same score cluster meeting the high average score and the low fluctuation at the same time is not found in the preset range, calculating the compromise index of each group so as to ensure that an executable puncture positioning point can be output even under a complex pelvis structure.

The application discloses a steel plate fixing auxiliary device for bone surgery and relates to the field of medical instruments, which comprises a fixing seat and an adjusting mechanism movably arranged at the bottom end of the fixing seat and used for adjusting the clamping distance, the bottom end of the fixing seat is symmetrically provided with clamping mechanisms used for clamping bones and slidably arranged, one side of each of the clamping mechanisms is fixedly provided with an opening and closing mechanism, one side of the opening and closing mechanism is symmetrically movably provided with a fixing mechanism used for fixing a steel plate, and the bottom end of the adjusting mechanism is fixedly provided with a centering sleeve rod used for centering the steel plate; the centering sleeve rod penetrates the center of the steel plate, the center of the steel plate is aligned with the center of the bone, the reverse clamping force is provided by the spring three-drive clamping plate, the steel plate is stably clamped in the middle in combination with the silica gel pad, the steel plate is opened and closed in cooperation with the stopper, the steel plate slides downward to the bone surface and is attached, the problems that the steel plate is prone to deviating from the center and is not accurately attached in traditional surgery are solved, the number of times of repeated adjustment and X-ray perspective in surgery is reduced, and the radiation risk is reduced.

The subtalar joint prosthesis comprises a talus assembly, a gasket and a calcaneus assembly, and the talus assembly and the calcaneus assembly are connected through the gasket to form a joint structure; by means of the split structure of the talus assembly, the gasket and the calcaneus assembly, all the assemblies are detachably clamped, step-by-step implantation and assembly in the operation process are facilitated, and therefore the adaptability of the prosthesis under different anatomical conditions is improved. The gasket is arranged between the talus assembly and the calcaneus assembly, a relative motion interface is formed between the talus assembly and the calcaneus assembly, the gasket is made of the low-friction material, direct friction between metal assemblies can be effectively reduced, abrasion is reduced, and the joint movement performance is improved. By means of the structural design, dependence of prosthesis implantation on accurate matching of bone surfaces is reduced, surgical operation is simplified, and meanwhile a feasible solution is provided for rebuilding after joint fusion operation.

The utility model relates to medical forceps technical field, concretely relates to an improved bone rong, including the bone rong formed by the two forceps body connected through hinge screw, still include: mounting screw, recess, the recess sets up in the mouth position of bone rong, and the mouth position occlusal surface is set into dentate; Two The forceps body is fixedly connected with elastic member through mounting screw. The jaw recess can be increased by widening the jaw of bone rong, so it can accommodate larger, more bone block, in addition, the blade on both sides of the jaw does not easily form interference when trimming large bone block; The jaw is toothed, the tooth tip contacts the bone surface when using, reduces the contact area, under the condition of equivalent force, the contact area reduces, and the pressure increases, so the bone rong can be more smoothly bitten into the bone surface and cut off the bone block, in other words, this design can save the effort, and prevents skidding when using.

An implant trial is configured for placement onto a joint of a bone. The implant trial includes a central portion sized for receipt in a joint. The implant trial also includes a peripheral portion extending from the central portion. The peripheral portion includes a first region and a second region separate from the first region. When the central portion is received in the joint, the peripheral portion is configured to be received over a bone surface adjacent to the joint such that at least part of a surface of the first region is flush with a prepared bone surface and at least part of a surface of the second region faces a void in the bone. The second region has a lattice structure defined by a plurality of openings sized to allow bone graft to be received therethrough.