53 results about "Bone contact" patented technology

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.

The disclosure includes devices for assisting in performing an ankle arthroplasty on a non-resected bone surface of a tibia and / or a talus. The devices may include patient-specific mating surfaces configured to engage the non-resected bone surface in a single relative position relative to the non-resected bone surface. The patient specific nature of the mating surface portion may be generated in the devices prior to the devices being brought into contact with the bone. The devices may include various cutting guides and holes for receiving fasteners to fasten the devices to the bone. The devices may include various features to enhance the stability and / or surface area contact between the devices and the bones.

In some embodiments, a bone implant for percutaneous use is provided. The bone implant comprises a head, a body adjacent to the head and a tip opposite the head. At least the head, body or tip is configured to contact bone. An expandable member contacts at least one of the head, tip or body and is movable from an unexpanded configuration to an expanded configuration when deployed at a bone implant site. In some embodiments, a system for percutaneous bone harvesting is provided.

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.

An ultrasonically vibrating surgical tool for removing cement (7) in artificial joint revision surgery has an ultrasonic vibration source operationally coupled to a working tip (5) that acts on the cement (7) in the lumen (8) of a bone such as a femur (1). When acting on the cement (7), the tool vibrates at substantially a single resonant frequency. If the working tip (5) comes into contact with a hard material such as the bone wall (6) of the femur (1), additional supplemental vibrations are generated at other frequencies. The tool is equipped with a microphone or other vibration detector to pick up these supplemental vibrations, which may be in the audible or ultrasonic range. If supplemental vibrations are detected at a frequency characteristic of contact between the working tip (5) and bone, the user of the tool is warned and the operation of the tool is interrupted.

The invention discloses a knee osteoarthritis auxiliary diagnosis method based on semi-supervised learning and double knowledge distillation, and the method comprises the steps: carrying out personalized pixel shuffling: dynamically recognizing a knee osteoarthritis diagnosis key region and a privacy sensitive region according to a KL grading standard and an OARSI guide, adjusting a privacy strategy through visual feature entropy based on KL grading, and carrying out personalized pixel shuffling; high-intensity pixel disturbance is applied to the knee osteoarthritis diagnosis key area, the edge gradient is reserved, and low-intensity disturbance is adopted for the non-KL grading key area; attention-guided distillation: embedding a pre-trained bone geometric morphology convolution kernel, strengthening osteophyte edge feature response, and applying 1.5 times of attention weight to a KL3-4-level bony contact area; and consistency pseudo-tag optimization: after the teacher and the bridging network generate pseudo-tags, screening and retaining the pseudo-tags meeting the consistency condition for student model training to obtain a classification auxiliary result of knee osteoarthritis. According to the invention, the problems of scarcity of medical image data and privacy protection are solved.

A bone fixation device (1) is presented, comprising a wire (7) and a load distributor (9), the load distributor comprising: a contact side (2) having a contact region (11) which is pressed against the bone to be fixed upon tightening of the wire (7), and two opposite lateral sides (4) that are not in contact with the bone upon tightening of the wire (7). At least one of the lateral sides (4) is provided with a plurality of recesses (5) which do not extend into the contact sides (2). The contact side (2) of the load distributor (9) has a continuous smooth surface which is configured to slide across the bone without damaging the bone when the load distributor (9) is pulled longitudinally across the bone during application.

Described herein are cannulated reamer designs and methods. In one embodiment, a reamer comprises a cannulated central body portion, a plurality of cutting legs and outer frame. The cannulated central body portion has an inner wall surface and an opposing outer wall surface defining a thickness and a bone contacting surface and an opposing distal end surface defining a length, the inner wall surface defining a bore about a central longitudinal axis of the cannulated central body portion. The plurality of cutting legs extends outwardly from the cannulated central body portion. The other defines a periphery of the reamer, the outer frame coupled to a lateral end of each of the plurality of cutting legs. The cannulated central body portion has a recess extending entirely through the thickness and only partially though the length.

This utility model discloses a digital dental 3D-printed titanium framework, comprising a pure titanium frame, a support mechanism and an occlusal mechanism on the pure titanium frame, the support mechanism including an upper support rod and a lower support rod, the top of the upper support rod being fixedly connected to a bone contact surface, the bone contact surface having multiple first micropores, multiple embedded protrusions at the outer edge of the bone contact surface, and first positioning markers on the bone contact surface, and multiple triangular support components between the upper and lower support rods, the triangular support components including a first support rod and a second support rod, belonging to the field of medical device technology. This digital dental 3D-printed titanium framework acquires three-dimensional data of the patient's teeth and jaws through an intraoral scanner, uses selective laser melting equipment, and selects medical-grade Ti-6Al-4V ELI alloy powder as the printing material, effectively improving accuracy, shortening the processing cycle, reducing weight, improving osseointegration efficiency, and reducing costs.

Graft for a bone defect, in particular a tibial head graft for a knee-joint endoprosthesis. It comprises a sleeve-like inner body (2) for implantation at one end of a long bone (99). An outer face of the inner body (2) is designed as a bone contact face (20) for bearing on the surrounding bone margin (97). According to the invention, an outer shell piece (3) is provided which, as a bone replacement piece, is doubled onto the outside of the inner body (2) for filling a defect at the cortical bone margin (97) and is not dimensioned peripherally, such that, in the circumferential direction, it covers only a part of the outer circumference of the inner body (2). The doubled outer shell piece (3) forms a filler piece for a bone defect (bone window 96) at the bone end. Closure of the bone window (96) is achieved, and unwanted contact between the graft and surrounding soft-tissue parts is avoided. Moreover, the graft is thus also supported in the region of the bone window (96). Parts of the bone margin (97) that are still present can thus remain intact, allowing the greatest possible preservation of naturally present bone substance.

The invention provides a periodontal disease tooth root regeneration treatment method and a multi-modal implant system, and relates to the technical field of stomatology and tissue engineering, and the method comprises the following steps: S1, minimally invasive extraction of autologous hDPSCs, CD146 + sorting, co-culture of the autologous hDPSCs, a gradient scaffold and growth factor-loaded microspheres in a dynamic culture device to form an ECM membrane-scaffold complex; s2, minimally invasive implantation of the complex under the guidance of a navigation guide plate, wherein the initial torsion resistance of the magnesium alloy retention nail is larger than or equal to 25 N.cm; s3, zirconium oxide all-ceramic crown repair is carried out 6 months after operation, an adhesive contains 20wt% of nano ZrO, dynamic culture parameters are as follows: 1Hz compressive strain, a double-channel perfusion flow rate ratio is (1: 2)-(1: 4), a culture medium contains 25-50ng / mL of BMP-2 and 5-8ng / mL of USAG-1, and the gradient scaffold has a three-layer pore structure: the porosity of an alveolar bone contact layer is 85 + / -3%. According to the system, a functional periodontal membrane is formed, and collagen fiber bundles are vertically inserted into cementum / bone tissue; the vascularization time is shortened by 50%, and the CD31 + vascular density reaches 28.3 + / -4.7 pieces / mm < 2 > in 14 days after operation.

According to the preparation method of the PEEK-based tantalum coating skull restoration, the tantalum coating is prepared through data modeling, fused deposition modeling 3D printing and magnetron sputtering, the preparation process is simplified, and the production efficiency and the product consistency are improved. Medical-grade PEEK serves as a substrate, a micro-nano structure is formed on the surface through laser pretreatment, an ultrathin tantalum coating (the thickness is smaller than or equal to 1 micrometer) is deposited through magnetron sputtering, the matching degree of the appearance of the prosthesis and the anatomical appearance of a skull defect area reaches + / -1 mm, and the proximity error between the elasticity modulus of a bone contact area and a host bone is smaller than or equal to + / -10%.

This invention relates to the field of veterinary medical device technology, and more particularly to a high-performance orthopedic implant for veterinary use and its preparation method. The method includes: preparing a solid external structure using additive manufacturing technology with a matrix material, and preparing a three-dimensional porous structure for the bone contact area on the solid external structure; preparing a micromaterial layer on the three-dimensional porous structure for the bone contact area using PVD technology, thereby obtaining the high-performance orthopedic implant for veterinary use. The preparation method of this invention combines additive manufacturing with technologies such as spraying, PVD, and laser sintering, employing cold spraying combined with laser sintering to overcome the non-metallurgical bonding defects of pure cold spray coatings, improving bonding strength and implant lifespan. The prepared implant possesses high mechanical strength, precise three-dimensional porosity, suitable elastic modulus, and good biocompatibility and osteoinductive properties. Through the synergistic effect achieved by the microporous structure and multi-material composite, excellent bone ingrowth can still be achieved even in cases of bone cell infarction.

The utility model provides a full-porous spine fusion cage with an extremely-small curved surface structure, and belongs to the technical field of medical instruments. The utility model comprises an extremely small curved surface porous structure which is a three-period spiral curved surface; the bone grafting windows are arranged on the pair of cambered surfaces of the extremely-small-curved-surface full-porous structure and are used in cooperation with bone grafting; and the instrument clamping area is arranged in the middle of the bottom surface of the extremely-small-curved-surface porous structure, is communicated with the bone grafting window and is used for clamping the spinal fusion cage by an instrument. According to the utility model, an extremely small curved surface porous structure formed by a three-period spiral curved surface is adopted, the comprehensive mechanical property is excellent, and the static compression strength and the fatigue strength are improved by more than 50%; the matching degree of the elasticity modulus and the human skeleton is high, the stress load is uniformly distributed, the mechanical reliability is high, and the anti-fatigue capability is strong; no compact solid part exists, so that the contact area with bones and the bone tissue ingrowth space are increased; blood is rapidly sucked into the pore channel through the capillary effect, bone fusion and vascularization are facilitated, and bone conduction, bone fusion and bone ingrowth performance is outstanding.

In some embodiments, a bone implant for percutaneous use is provided. The bone implant comprises a head, a body adjacent to the head and a tip opposite the head. At least the head, body or tip is configured to contact bone. An expandable member contacts at least one of the head, tip or body and is movable from an unexpanded configuration to an expanded configuration when deployed at a bone implant site. In some embodiments, a system for percutaneous bone harvesting is provided.

An interbody implant system for use in the spine includes a base comprising two or more bone contacting surfaces, at least one recess in at least one of the two or more bone contacting surfaces, the recess configured for containing a tooth, a deployable tooth to provide fixation between the base and the anatomy of a subject, a break-away bridge between the tooth and the base for providing a first relative position between the tooth and the base, and a locking mechanism for providing a second relative position between the tooth and the base.

An interbody implant system for use in the spine includes a base comprising two or more bone contacting surfaces, at least one recess in at least one of the two or more bone contacting surfaces, the recess configured for containing a tooth, a deployable tooth to provide fixation between the base and the anatomy of a subject, a break-away bridge between the tooth and the base for providing a first relative position between the tooth and the base, and a locking mechanism for providing a second relative position between the tooth and the base.

Systems and methods include a component of a bone implant that includes a patient specific bone contacting surface and, optionally, at least one protrusion adjacent to or extending from the patient specific bone contacting surface. The at least one protrusion is configured for engaging a bone preparation in the bone. To prepare the bone for receiving the component, one or more cutting tool templates may be used. The one or more cutting tool templates may be fabricated to have a patient specific bone contacting surface that engages the bone that is to receive the implant component. A cutting tool is engaged in one or more of one or more slots defined by the cutting tool template(s) to remove surface portions of the bone to create the bone preparation for engaging the protrusion. The patient specific bone contacting surface of the component engages the bone.

A metatarsal implant for repairing damage in a metatarsophalangeal joint of a patient and in particular for repairing damage caused by osteofytes or as a result of osteofytes is provided. The metatarsal implant is adapted to be attached to an implant receiving surface at least partly covering a lateral surface of the metatarsal head. A bone contacting surface of the metatarsal implant is designed to correspond to the implant receiving surface, the bone contacting surface thus comprising at least two sub-surfaces in different planes, and at least one junction point where sub-surfaces meet, and a contour curvature of the articulating surface is designed by simulating a healthy articulating surface of the damaged metatarsal head, generated based on a determined surface curvature of the cartilage and / or the bone in a predetermined area at the site of diseased cartilage and / or bone, to mimic the original, undamaged, articulating surface of the metatarsal head.

The invention discloses a hip joint prosthesis system and a preparation method thereof. The hip joint prosthesis system comprises a thighbone assembly, an acetabulum assembly and a soft tissue fixing device. The femoral component comprises a femoral stem and a femoral bulb, the femoral stem comprises a bone contact surface used for being combined with the thighbone of a user and a near-end bearing portion used for being connected with the femoral bulb, the near-end bearing portion extends laterally to form a neck, and the neck is provided with an interface structure. The bone contact surface of the femoral stem and the bone contact surface of the acetabular cup are each provided with a three-dimensional porous structure. The acetabulum assembly comprises an acetabulum lining arranged on the femur ball head in a sleeving mode and an acetabulum cup arranged outside the acetabulum lining in a sleeving mode. The soft tissue fixing device is mounted on the interface structure; the pore characteristic parameters of the three-dimensional porous structure on the femoral stem change in the axial direction of the femoral stem. According to the invention, the limitation that the traditional uniform coating cannot give consideration to the optimal bone ingrowth conditions of different bone regions can be overcome, and uniform and firmer osseointegration of the prosthesis in the body of a patient can be promoted.

A method for designing a patient-specific implant is provided. The method includes the steps of obtaining a 3D model of at least an articulation portion of a patient's bone, virtually cutting the articulation portion of the 3D model of the patient's bone for defining a resected bone surface having a resected surface area, selecting an implant from a library of standard implants based on the 3D model, virtually engaging the bone-contacting surface of the selected implant with the resected bone surface, designing an implant peripheral portion configured to extend from the selected implant and conform to the 3D model and virtually combining the selected implant and designed implant perimeter to create a 3D model of the patient-specific implant.

A gradient porous structure (200) for one or more bone contacting surfaces of a total ankle replacement implant (100) is provided. The gradient porosity of the porous structure may be optimized to match the natural variation of a patient's bone density, while the pattern (202) of the porous structure may be optimized to maximize mechanical strength so that the implant is structurally stable within the ankle joint.

An implant may include a peripheral structure, an opening for receiving part of an insertion device, and a plurality of bone contacting elements. A first lateral portion and an anterior portion are joined at a first corner portion of the peripheral structure and a second lateral portion and a posterior portion are joined at a second corner portion of the peripheral structure. Also, the opening is disposed in the first corner portion of the peripheral structure. Further, the opening has a central axis and the implant further includes at least three support beams including a first support beam extending along a second axis through a central portion of the implant from the anterior portion to the posterior portion of the peripheral structure. In addition, the second axis of the first support beam is oriented at an oblique angle with respect to the central axis of the opening.

Graft for a bone defect, in particular a tibial head graft for a knee-joint endoprosthesis. It comprises a sleeve-like inner body (2) for implantation at one end of a long bone (99). An outer face of the inner body (2) is designed as a bone contact face (20) for bearing on the surrounding bone margin (97). According to the invention, an outer shell piece (3) is provided which, as a bone replacement piece, is doubled onto the outside of the inner body (2) for filling a defect at the cortical bone margin (97) and is not dimensioned peripherally, such that, in the circumferential direction, it covers only a part of the outer circumference of the inner body (2). The doubled outer shell piece (3) forms a filler piece for a bone defect (bone window 96) at the bone end. Closure of the bone window (96) is achieved, and unwanted contact between the graft and surrounding soft-tissue parts is avoided. Moreover, the graft is thus also supported in the region of the bone window (96). Parts of the bone margin (97) that are still present can thus remain intact, allowing the greatest possible preservation of naturally present bone substance.

A tibial component includes a baseplate component that has an articular side and a bone contact side opposite the articular side. A peg extends from the bone contact side such that an acute angle is formed between a longitudinal axis of the peg and the bone contact side of the baseplate component. The peg includes a distal tip, an anterior portion, and a posterior portion. The distal tip defines a first radius of curvature, the anterior portion has a spherical portion that defines a second radius of curvature and extends from the distal tip, and the posterior portion has a conical portion that defines a taper angle relative to a longitudinal axis of the peg and extends from the distal tip.

The invention discloses a 3D printing anterior cervical interbody fusion implantation system assisted by an orthopedic robot. The 3D printing anterior cervical interbody fusion implantation system comprises a steel plate body (1) and a fusion cage body (2), the steel plate body (1) is of a spatial curved-plate-shaped structure, and pedicle screw placement holes (1.1) are formed in the steel plate body (1). A coating of graphene or a derivative thereof can be arranged on the surface of the implant. The robot-assisted surgery system comprises a handle (3), a control unit (12), an interaction module (6), a visual detection module (7), a mechanical arm (8), a holder (9) and the like. The device adapts to personalized operations, and is large in bone contact area, good in stability and high in fusion rate. By applying the visual operation system of the orthopedic robot, the accuracy and safety of screw placement of the anterior cervical pedicle screw are improved, the number of times of fluoroscopy in an operation is reduced, the operation process is simplified, and accurate treatment of an orthopedic operation is achieved.

Systems and methods include a component of a bone implant that includes a patient specific bone contacting surface and, optionally, at least one protrusion adjacent to or extending from the patient specific bone contacting surface. The at least one protrusion is configured for engaging a bone preparation in the bone. To prepare the bone for receiving the component, one or more cutting tool templates may be used. The one or more cutting tool templates may be fabricated to have a patient specific bone contacting surface that engages the bone that is to receive the implant component. A cutting tool is engaged in one or more of one or more slots defined by the cutting tool template(s) to remove surface portions of the bone to create the bone preparation for engaging the protrusion. The patient specific bone contacting surface of the component engages the bone.

An implant, system, and method used for inserting a tendon repair implant system into a patient's humerus. The implant system includes an implant and at least one staple. The implant includes a body, a first arm extending away from the body on a first end of the implant, and a second arm extending away from the body between the first end and a second end of the implant. The implant may also include a hydrogel coating with a gradient of human growth factors positioned on at least the bone contacting surfaces. The implant is positioned on the proximal humerus and greater tuberosity with the two arms of the implant spaced apart forming a passageway for receiving the rotator cuff tendon.

A stemless implant for shoulder arthroplasty includes a body having a proximal portion, distal portion, and an outer surface. A cylindrical extrusion is substantially perpendicular to and adjacent the proximal portion. At least a portion of the outer surface is configured to contact bone, the outer bone contacting surface comprising a concave taper. The stemless implant can be sized and shaped for insertion into a metaphysis of a humerus bone without penetrating a diaphysis of the humerus bone. The implant optionally comprises a medial fin, a lateral fin, an anterior fin, and a posterior fin. The medial fin and lateral fin may be thicker than the anterior fin. The fins may taper from the proximal portion to the distal portion.

A guide for use in cutting a bone is disclosed. The guide includes a bone contacting surface contoured to conformably mate with a first bone surface when placed against the first bone surface, and a guide surface that is spaced apart from the bone contacting surface. At least one prescribed patient-specific depth of cut information is provided on the guide surface that corresponds to the desired depth of cut being made using the guide.