90 results about "Bone contact" 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.

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.

A prosthetic femoral component includes an articular component and a bone contacting component. The articular component has a convex articular surface and a concave curved inner surface opposite the convex articular surface. The bone contacting component is least partially insertable within the articular component and has an outer side and an inner side opposite the outer side, the outer side having a convex curved surface received on and complementary to the concave curved inner surface of the articular component, and the inner side being defined by a plurality of adjacent planar segments.

The present disclosure in one aspect provides a surgical implant comprising an upper bone contacting surface comprising a plurality of irregularly shaped pores having an average pore size, where the pores are formed by a plurality of struts, a lower bone contacting surface comprising a plurality of irregularly shaped pores having an average pore size, wherein the pores are formed by a plurality of struts; and a central body comprising a plurality of irregularly shaped pores having an average pore size, wherein the pores are formed by a plurality of struts, wherein the average pore size on the upper and lower bone contacting surfaces is different than the average pore size on the central body.

A multi-level vertebral implant comprising a biocompatible cage disposed between a first and a second endplate configured to maximize subsidence and bone contact with adjacent vertebrae is disclosed. In some embodiments, the multi-level vertebral implant comprises a first and a second endplate having plurality of anti-migration features on the bone contacting surfaces of the endplates. In various embodiments, the endplates may be configured to prevent radial and axial rotations of biocompatible cage. In various embodiments, each endplates further comprise and anterior plate that is configured to provide anchoring of the multi-level vertebral implant to ventral surfaces of the adjacent vertebrae to prevent migration of the multi-level vertebral implant in an installed state.

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.

A prosthetic femoral component includes an articular component and a bone contacting component. The articular component has a convex articular surface and a concave curved inner surface opposite the convex articular surface. The bone contacting component is least partially insertable within the articular component and has an outer side and an inner side opposite the outer side, the outer side having a convex curved surface received on and complementary to the concave curved inner surface of the articular component, and the inner side being defined by a plurality of adjacent planar segments.

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.

A dual predrilling module for drilling a fixation hole and a repair tunnel in a bone is provided. The dual predrilling module includes a body comprising a bone interface side comprising a bone contacting surface engageable with a surface of the bone or a fixation plate engaging side removably engageable with a fixation plate, and an operative side opposite the bone interface side or the fixation plate engaging side. The dual predrilling module further includes an osteotomy drill guide to create a fixation hole according to a fixation hole pathway, and a repair drill guide extending outwardly to create a repair tunnel according to a repair tunnel pathway, the repair tunnel pathway being determined to intersect a predetermined cutting plane intended to create an osteotomy and to extend across the bone to open to an articular surface of bone, without intersecting the fixation hole pathway.

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 spinal fusion system comprising an interbody device includes a leading end, trailing end, and opposed bone contacting sides extending therebetween. The trailing end defines a threaded opening that extends toward the leading end. The system also includes a bone plate that includes inner and outer surfaces and defines a first bone screw opening and connection screw opening extending therethrough. The system further includes a connection screw that includes a head and a threaded shaft. The head is positioned within the connection screw opening of the bone plate and is rotatably connected thereto such that the connection screw is rotatable about a longitudinal axis thereof but is prohibited from translational movement relative to the bone plate. The threaded shaft extends from the connection screw opening and is configured for threaded engagement with the threaded opening of interbody device.

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.

The invention relates to an extension section prosthesis and a prosthesis system.The extension section prosthesis comprises a main body part and a connecting part, the connecting part is arranged at the axial end of the main body part and used for being matched with a knee joint prosthesis, the end, away from the connecting part, of the main body part is provided with a bone contact face, a trophoblast is formed in the main body part, and the bone contact face is matched with the trophoblast. One end of each nutrient foramen is communicated with the bone contact surface, and the other end of each nutrient foramen is communicated with the outer wall surface of the main body part. The fusion effect of the extension section prosthesis and surrounding tissues is good, the stability after implantation is high, and the extension section prosthesis is not prone to loosening.

An osteotomy guide (100) includes an inner surface (102) that faces the bone (300), and an outer surface (104) opposite the inner surface (102) along an outward direction (Do). The inner surface (102) defines proximal and distal bone contacting regions (118,120) that are spaced from one another by a gap (124) that extends into the inner surface (102) towards the outer surface (104). The guide (100) includes an ascending guide surface (134) that extends along an ascending direction so as to define an ascending cutting path into the bone (300). The guide (100) includes a transverse guide surface (138) that extends along a transverse direction so as to define a transverse cutting path into the bone (300).

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.

A talar implant system comprises a body. The body includes a bone contact surface and an articulation surface located opposite the bone contact surface. The body defines at least one angled fastener hole extending therethrough from the articulation surface to the bone contact surface along a longitudinal axis. The articulation surface is configured to mimic articulation of the talar dome. A fastener is sized and configured to be received within the at least one fastener hole at a first angle with respect to the longitudinal axis of the fastener hole. A fastener cap is sized and configured to be received within a proximal end of the at least one fastener hole. The fastener cap couples the body to the fastener.

The invention discloses an artificial ligamentum flavum complex which comprises an artificial ligament and two fixing seats, and the two ends of the artificial ligament are fixedly connected with the two fixing seats respectively. Screw holes are formed in the two fixing seats, the two fixing seats are fixedly connected with the spine by installing screws into the respective screw holes, and the bone contact surfaces at the bottoms of the two fixing seats are provided with micropore structures. When the artificial ligamentum flavum complex is installed on the spine, the artificial ligamentum flavum complex can replace the cut ligamentum flavum to maintain the mechanical stability of the spine and cover the dura mater to reduce postoperative dura mater scars. Therefore, the artificial ligamentum flavum complex can replace ligamentum flavum removed in the operation, improve the stability of the spine of a patient, reduce postoperative spine instability, protect spinal canal duramater and nerves, reduce scar adhesion and improve the postoperative clinical effect.

An implant may include a first body member and a second body member, at least one bone contacting arched member, and a first external element extending from the first body member to the second body member, wherein the first external element has an undulating planar geometry in which the first external element undulates in a single plane.

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.

Orthopedic implants having an implant body, a bone contact surface, and a tendon contact surface, wherein the tendon contact surface comprises an elevation ramp sloping downward from the proximal side to the distal side of the implant body and a realignment ramp sloping downward from the lateral side to the medial side of the implant body. Also disclosed are methods for repositioning a tendon that include inserting an orthopedic implant having a complex geometry tendon engagement surface between the tendon and a bone, engaging a bone engagement surface of the orthopedic implant with the bone, engaging a tendon surface with the tendon engagement surface; and causing a repositioning of the tendon via the complex geometry tendon engagement surface by at least one of (a) rotating the tendon along its axial plane, and (b) translating or shifting the tendon along its horizontal plane.

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.