50results about How to "Implant stability" patented technology

A delivery system and method for percutaneous aortic valve (PAV) replacement and apparatus used therein. A temporary aortic valve comprised of a reversibly expandable occluding means, such as balloons, surrounds a central catheter mechanism. The temporary valve is positioned within the ascending aorta, just above and downstream from the coronary ostia. The occluding means is configured such that, when fully expanded against the aortic wall, gaps are left that promote continuous coronary perfusion during the cardiac cycle. The temporary valve with occluding means substitutes for the function of the native aortic valve during its replacement. The native aortic valve is next dilated, and then ablated through deployment of low profile, elongated, sequentially delivered stents. The ablation stent(s) displace the native valve tissues and remain within the aortic annulus to receive and provide a structure for retaining the PAV. The PAV is delivered, positioned and deployed within the ablation stent(s) at the aortic annulus with precision and relative ease. Ablation of the native aortic valve removes the structural obstacles to precise PAV placement. The temporary aortic valve mediates the hemodynamic forces upon the devices as encountered by the surgeon following native valve ablation. The temporary valve also promotes patient stability through continuous coronary perfusion and a moderated transvalvular pressure gradient and regurgitation. Sequential delivery of low profile PAV components minimize the risk of trauma and injury to vascular tissues. Mathematical considerations for determining the optimum cross-sectional area for the temporary valve blood perfusion gaps are also described.

An interpositional biarticular disk implant (11) having a circular peripheral rim, a generally toroidal axial center opening (13) and convex upper and lower surfaces (15, 17) is implanted between resected concave surfaces of the metacarpal base and the trapezium or other carpal bone in a CMC joint replacement. The disk (11) is anchored in operative position through the use of a flexable cond, such as a harvested tendon that passes through the center opening (13) and through osseous passageways created in the two facing bones.

Disclosed is a drug delivery implant implanted into a bone. The drug delivery implant includes an implant fixture provided with an inlet formed at the upper end thereof and a drug supply cartridge coupled to the fixture, the drug supply cartridge includes a cap to close the inlet of the fixture and a cartridge main body provided under the cap, coupled with the cap and accommodated in the fixture to release a drug, and a cartridge hole to accommodate the cartridge main body and drug channels to guide the drug released from the inside of the cartridge main body to the outside of the fixture are formed in the fixture. The drug delivery implant may continuously administer the drug into bone tissues and mount the drug cartridge together with the cap in the fixture, thus facilitating mount of the drug cartridge in the fixture and replacement of the drug cartridge.

A p-type region of a light receiving section is formed by implanting boron ions from the direction normal to a semiconductor substrate. The ion implantation conditions of boron are a few hundred to 4 MeV for the ion implantation energy, 1×10¹⁰ to 1×10¹² ions/cm² for the implanted dose, and 0 degree±0.2 degrees for an ion implantation angle (θ) with respect to the direction normal to the surface of the semiconductor substrate.

The invention relates to a 3D printing device of an oral cavity apparatus and a printing method thereof. The 3D printing device comprises a forming worktable, a power paving device, a first laser module, a second laser module and a laser control module, wherein the laser control module controls the first laser module to output continuous laser to scan and form to form a printing layer of the oralcavity apparatus and output pulse laser for precise processing; the second laser module carries out subtractive processing of a microstructure on the printing layer of the oral cavity apparatus. According to the 3D printing device of the oral cavity apparatus and the printing method thereof provided by the invention, by sending out continuous laser and pulse laser separately by adopting an opticalfiber laser: a first laser with high stability, carrying out scan forming to form the printing layer of the oral cavity apparatus through the first laser for precise processing and carrying out subtractive processing of the microstructure on the printing layer by means of the second laser, follow-up grinding treatment on the oral cavity apparatus of 3D printing is not needed. The oral cavity apparatus is printed and molded at one time, and the 3D printing device has a high precision and simplifies the production step.

The invention discloses a combined type renal artery stent. The combined type renal artery stent can select a certain number of segmented stents to form a proper length of renal artery stent accordingto the lesion position and range so as to meet the individualized needs of patients. Meanwhile, because the various segmented stents are connected in a protrusion and groove clamping mode, the peripheries of the various segmented stents have impenetrable X ray markers to achieve rapid assembly and accurate positioning. The drug coating on the surface can reduce the incidence of various complications by slow release and reduce the risk of human body lumen restenosis. In addition, the combined type renal artery stent can be bent naturally according to the structural characteristics of the humanrenal artery so as to be more consistent with human tissue adaptability and make implantation safer and more stable.

The invention discloses a combined type femoral stem. The combined type femoral stem is used for fixing hip joint prostheses and comprises proximal femurs (1) and distal femurs (2). The bottom surfaces of the proximal femurs (1) are sunken to form limiting holes (11) in the shapes of inverted cones, the tops of the distal femurs (2) upwardly extend to form conical limiting columns (21), the conical limiting columns (21) are inserted into the limiting holes (11) in the shapes of the inverted cones, and the proximal femurs (1) with different specifications are connected with the distal femurs (2) with different specifications, so that the combined type femoral stem is adaptive to patients with different anatomic morphologies of pulp chambers. The combined type femoral stem has the advantages that the proximal femurs and the distal femurs are of adjustable structures, and accordingly the combined type femoral stem is wide in applicable patient range and is practical; the prostheses can be stably implanted into the patients, and surgery can be facilitated; stem-shaped structures are favorable for blood supply for the femoral hip chambers of the patients; the combined type femoral stem is excellent in rotation resistance and bone ingrowth, and accordingly the service lives of the prostheses can be prolonged.

The invention relates to a preparation method of an anatomical type three-dimensional printing corrugated pipe elastic body tracheal stent and a product thereof. Biological elastic body poly 1, 8- octylene glycol-citric acid (POC) and polycaprolactone (PCL) are main structural materials of a mechanical support, nano-sized hydroxyapatite particles (Hap) are used as a filler and are mixed with POC-PCL to form POC-PCL/Hap master batch, and then a degradable tracheal stent material is prepared by a three-dimensional printing method through melt deposition forming. The stent consists of a tubular body, four symmetrical circular holes are formed in the edge of the body and are used for fixing an air pipe, the surface of the stent is smooth and corrugated, the diameter of the stent is 2cm, the length of the stent is 6cm, and an array of holes are distributed on the corrugated curved surface of the stent. The tracheal stent has the advantages of accurate implantation, convenient operation, acceleration of postoperative healing, good stability, firmness and difficulty in releasing.

The invention discloses a rice seedling transplanting tube. The rice seedling transplanting tube having an opened mud discharging paw is adopted, a seedling insert channel is arranged nearby the mud discharging paw, the mud discharging paw is used to dig a hole in the field in advance, and a seedling is inserted into soil in a pneumatic manner, so the tube has the advantages of very simple operation, no foiling to hands, no need of repeated waist bending for seedling transplantation, and good social benefit.

The invention discloses a mechanical hand which is used for implanting a nut. The mechanical hand comprises a rack, a grabbing mechanism, a slide mechanism, a power mechanism and a return mechanism. In production operation, the nut is grabbed by the grabbing mechanism, and the nut is kept to not drop under clamping action of a first clamping plate and a second clamping plate. The power mechanism drives a slide plate to slide in a slide slot, drives an ejector pin to get out of a limiting hole, and ejects out the grabbed nut to implant into a target element. After implanting is completed, the power mechanism stops applying force to the slide plate, and the slide mechanism is returned under action of an elastic part of the return mechanism. The grabbing mechanism continuously grabs a next nut to enter next implanting operation, so that continuous and automatic production is realized, and implanting efficiency is improved. The ejector pin slides and is stable in a return process, so that the nut is prevented from the defects such as floating or sinking, and therefore, the implanting effect is relatively good.

The invention discloses a video advertisement implanting method and device, electronic equipment and a storage medium, and the method comprises the steps: obtaining a corresponding video frame according to a to-be-played video stream; selecting a target area for implanting an advertisement from the video frame; correspondingly implanting an advertisement frame corresponding to a to-be-implanted advertisement into the target area of the video frame according to a playing sequence to obtain the video frame after the advertisement is implanted; and obtaining a video stream containing the advertisement according to the video frame in which the advertisement is implanted. According to the scheme, the exposure rate and the acceptance degree of the advertisement can be improved.

The invention discloses a 3D printing tibia intramedullary nail total ankle joint prosthesis. The 3D printing tibia intramedullary nail total ankle joint prosthesis is characterized by comprising a tibia fixing rod and a tibia far-end total ankle joint prosthesis; the tibia fixing rod comprises a tibia fixing rod body; the lower part of the tibia fixing rod body is provided with a tibia far-end connecting body; the outer surface of the tail end of the tibia far-end connecting body is conical, and an inner threaded hole is formed in the tail end of the tibia far-end connecting body in the axial direction; the tibia far-end total ankle joint prosthesis comprises a tibia far-end prosthesis, a polyethylene liner and a calcaneus and talus prosthesis; and a taper connecting hole is formed in the upper end of the tibia far-end prosthesis, the tail end of the tibia far-end prosthesis is inserted into the taper connecting hole in a conical mode, the taper connecting hole is provided with a screw hole connected with an arch-shaped opening, and the tibia far-end prosthesis and the tibia fixing rod are connected by screwing a screw into the screw hole and the inner threaded hole. The 3D printing tibia intramedullary nail total ankle joint prosthesis has the advantages that the prosthesis is suitable for prosthesis replacement of a patient with the distal tibia resection, the wing plates and the grooves are arranged in the axial direction, so that implantation of the prosthesis is more stable, and medium-and-long-term stability is good.

The present invention provides a nut for a dental implant and methods related thereto, said nut adapted to be positioned under the sinus membrane of a maxillary sinus of a patient and comprising a hollow body having a first end, a second end and a through passage extending from the first end to the second end, wherein the second end abuts against the maxilla when the nut is positioned under the sinus membrane in a maxillary sinus of a patient and the through passage is adapted for receiving a dental implant at said second end, and wherein said second end further comprises at least two pins, adapted to extend into the maxilla when said nut is implanted under the sinus membrane in a maxillary sinus of a patient.