19results about How to "Improve initial stability" patented technology

The present application belongs to the field of medical surgical instruments, and provides an elbow joint surgical instrument, which includes a head, fixed wings, and a fixed cage. The head is used to cover the surface of the distal end of the humerus; the fixed wings are connected to the side of the head and are used to connect to the humerus; the fixed cage is connected to the head and forms a bone crushing groove with the head for accommodating the filling bone, and the fixed cage also has a limiting structure for cooperating with the bone tissue of the distal end of the humerus. The elbow joint surgical instrument provided by the present application can greatly reduce the amount of osteotomy, which is conducive to later revision surgery. The filling bone placed in the bone crushing groove is conducive to promoting the patient's postoperative recovery and postoperative weight-bearing. The limiting structure cooperates with the bone tissue in the corresponding area of ​​the distal end of the humerus, which is conducive to strengthening the stability of the elbow joint surgical instrument fixed on the distal end of the humerus.

The invention discloses a multi-point retention two-section tooth root type implant device and application thereof, and relates to the technical field of human oral medicines.The multi-point retention two-section tooth root type implant device comprises a tooth root type implant, a gum penetrating necklace, retention screws, healing screws, repair screws and a repair abutment, internal threads are designed in the bolt channels, a retention groove is formed in the occlusal surface of the upper end of the implant, a V-shaped bolt channel is formed in the repair abutment, a small opening of the bolt channel corresponds to the repair retention bolt channel of the gingival surface of the implant, a retention protrusion matched with the retention groove is arranged on the gingival surface of the repair abutment, and the gingival penetrating collar is used after being subjected to 3D printing through zirconium oxide and glazing on the tissue surface. The problem that the gingiva of the metal gingival penetrating part becomes black and is not attractive due to metal ion precipitation and oxidation is solved, bacteria are not prone to being retained on the glazed smooth surface, and peri-implantitis is effectively prevented; according to the technical scheme, the initial stability of RAI planting can be improved, and the clinical adaptation of RAI is expanded.

This invention discloses a hip joint prosthesis for bone defects, comprising a crescent-shaped acetabular rim filler assembly, a bone-metal defect block, an acetabular wall defect support block, a cylindrical support block, an angle pad, a locking screw, a locking nut, an assembly screw, an acetabular sealing screw, and an acetabular support block. The crescent-shaped acetabular rim filler assembly includes two sets of crescent-shaped acetabular rim fillers, which are assembled by engaging pins through pin holes. The outer circumference of the bone-metal defect block of the acetabular support block is connected to the crescent-shaped acetabular rim filler assembly via bone cement. This hip joint prosthesis for bone defects effectively fills irregular defect areas of the acetabular rim. The various screw holes and Kirschner wire holes on its surface provide multi-dimensional fixation options. The overall structure, through the synergistic action of multiple components, achieves precise reconstruction while ensuring biomechanical performance, significantly reducing the risk of postoperative prosthesis loosening and wear.

The present invention discloses a single-blade hyperboloid structure floating foundation and an offshore floating wind turbine system, including a foundation body and a damper. The foundation body is a single-blade hyperboloid structure as a whole, including an upper disc platform, a middle disc platform, a lower disc platform, a foundation support, an arc-shaped diagonal brace and an inclined buoy. The upper disc platform, the middle disc platform and the lower disc platform are arranged in sequence from top to bottom. The center of the upper disc platform and the middle disc platform is connected by the foundation support, and the outer periphery of the upper disc platform and the outer periphery of the middle disc platform are connected by an arc-shaped diagonal brace. A damper is arranged between the foundation support and the arc-shaped diagonal brace, and a plurality of inclined buoys are arranged circumferentially between the outer periphery of the middle disc platform and the outer periphery of the lower disc platform. The present invention can effectively avoid the enhancement of the pitch, roll and heave motion response of the wind turbine system, effectively improve its stability, and does not need to increase the foundation size and the length of the mooring system, and has good economy.

This invention relates to the field of metal oxide technology, specifically to a highly dispersed nano-gadolinium oxide and its preparation method. The preparation method includes: activating surface sites through weak acid etching, pulsed ultrasonic depolymerization, and hydrothermal re-hydroxylation; adsorption using a polycarboxylic acid chelating agent; introducing hydrophobic chains and tertiary amine groups through sequential amidation; forming a strongly hydrated outer layer through beet alkalization; and finally, ultrafiltration desalting and concentration. The nano-gadolinium oxide dispersion obtained by this method has advantages such as narrow particle size distribution, low viscosity, good storage stability, and strong electrolyte resistance, making it suitable for high-end applications such as polishing slurries and coating precursors.

The invention relates to an orthopedic implantation instrument which comprises a porous layer, the porous layer comprises a variable-diameter section, the variable-diameter section is made of a memory material, so that the variable-diameter section has an original state and a deformation state, and in the deformation state, the variable-diameter section can respond to deformation to the original state after receiving specific stimulation; in a deformation state, the surface of the porous layer is smooth, the thickness is matched with a receptor bone tissue part, and the thickness of the reducing section is smaller than that in an original state; the memory material is used as the reducing section, so that the orthopedic implantation instrument can be directly implanted into a corresponding receptor bone tissue part in a deformation state, tool striking and pressurizing implantation is not needed, and the possibility of potential complications and frequent postoperative pain caused by striking and pressurizing implantation is reduced; besides, after implantation is completed, the reducing section can respond to special stimulation to deform to an original state, and the thickness of the reducing section is increased to realize active pressurization, so that the orthopedic implantation instrument and a receptor bone tissue are fixed through interference fit, and better initial stability is achieved.

This invention discloses an experimental water tank system and a ship statics experimental teaching platform, belonging to the field of ship statics experimental teaching. The ship statics experimental teaching platform includes an experimental water tank system and an experimental ship model set within the experimental water tank system. In the experimental ship model, four transparent transverse bulkheads longitudinally divide the interior of the ship body into a bow compartment, three midship compartments, and a stern compartment. Two transparent longitudinal bulkheads laterally divide the bow or stern compartment into three areas, with the middle area being the bow area liquid tank. The middle compartment among the three midship compartments is the midship area liquid tank, which can be divided into two half-tanks or restored to a full tank via a vertically movable central bulkhead. A detachable grounding platform is used to ground the experimental ship model. This invention enables experimental teaching of ship static stability, first-type damaged stability, second-type damaged stability, third-type damaged stability, grounding, and mooring theories.

The invention provides a novel implant appearance structure which is characterized in that the appearance form of an implant is formed by connecting three sections of arcs with different radiuses, the three sections of arcs are divided into a neck arc, a body arc and a root arc, the radius of the neck arc is larger, the radius of the body arc is smaller, and the root arc is smaller, so that a cone-like structure from the neck of the implant to the root is formed; the implant has the advantages that the structure is simple, the appearance structure is rounder, the implant is similar to the tooth root form of a natural tooth, the stress distribution between the implant and a bone interface is improved, the stress concentration is reduced, the initial stability and the implantation torque of the implant are improved, and the implant has good self-tapping performance, so that the implant is easier to implant, and the mechanical stability of the implant is enhanced. According to the novel implant appearance provided by the invention, the traditional design is improved, so that better biomechanical adaptability and clinical application effect are realized, and remarkable progress is brought to the field of dental implant.

The application discloses an air duct mounting device and a mounting method, and belongs to the technical field of core unit assembly. The device comprises a main body driving assembly, a positioning and stopping assembly, a hook holding control assembly and an auxiliary operation assembly. The main body driving assembly comprises a rod, and a first handle is arranged on the upper portion of the rod. The hook holding control assembly comprises a hook claw arranged at the lower end of the rod and a hook rod penetrating the rod, a boss is arranged on the hook claw, the boss is used for being connected with a groove in the middle portion of the air duct during work, and the air duct is controlled to move up and down and rotate. One end of the hook rod is connected with the hook claw, a second cylindrical pin is arranged on the other end of the hook rod penetrating the rod, the second cylindrical pin is used for driving the hook rod to move up and down by control, and the boss of the hook claw is popped out or withdrawn. The positioning and stopping assembly comprises a stopping sleeve movably sleeved on the upper portion of the rod, and a second handle is arranged on the stopping sleeve. The stopping sleeve is matched with an end groove on the rear end face of the high-vortex first-stage disc rear shaft neck, so that stopping is realized during the tightening process.

The present invention discloses an implant denture device, including an implant and a crown, wherein the crown is arranged on the implant by a screw, the implant includes a main body, the outer surface of the main body is provided with an external thread, the implant is provided with a blind hole inside, the blind hole is stepped, and a shallow cylindrical hole, a deep cylindrical hole and a threaded hole are arranged in sequence from top to bottom in the blind hole; the crown is hollow inside, and a stepped hole is arranged inside, the lower part of the crown is provided with a short cylinder adapted to the shallow cylindrical hole and a long cylinder adapted to the deep cylindrical hole, and the rod of the screw passes through the stepped hole and is connected to the threaded hole. The present invention increases the strength of the crown contacting with the implant and the insertion part of the implant, the crown is fixed to the implant by a central screw, the positioning is accurate, and no base is required, which greatly simplifies the implant restoration structure, simplifies the restoration surgery, and shortens the restoration time. It has a simple structure and is easy to manufacture, and the manufacturing and maintenance costs are low.

The invention relates to the technical field of medical instruments, in particular to an adjustable eccentric knee joint center defect filling system which comprises an eccentric conversion connector, a center cushion block and a prosthesis, the prosthesis is provided with a prosthesis connecting column center hole, the center cushion block is provided with a center cushion block connecting hole, and the eccentric conversion connector is provided with a prosthesis connector and a center cushion block connector. The prosthesis connector and the center cushion block connector are arranged oppositely and eccentrically, the prosthesis connector is inserted into the center hole of the prosthesis connecting column, and the center cushion block connector is inserted into the center cushion block connecting hole. The system provided by the invention can effectively solve the problem of poor bone coverage caused by eccentricity of a medullary cavity and a prosthesis, improves the comfort of a patient, is good in overall supporting performance, can prevent collapse after bone defect repair, can ensure initial stability, and is beneficial to later-stage bone growth.

The invention discloses a reed with good durability and a preparation method thereof, and relates to the technical field of reeds. The preparation method of the reed with good durability comprises the following steps: taking raw materials, smelting the raw materials in an argon atmosphere, and casting and cooling the raw materials to obtain a cast ingot; the cast ingot is subjected to homogenization treatment, surface milling is conducted after furnace cooling, and then blooming is conducted; annealing is carried out after primary rolling, finish rolling is carried out, a thin strip is obtained, stamping cutting and annealing are carried out, and a rough reed is obtained; the rough reed is taken, cleaned, dried and polished and then placed in a passivation solution to be soaked, and the finished reed is obtained; the passivation solution comprises the following raw materials in percentage by mass: 1-4% of benzotriazole, 0.3-0.5% of a surfactant, 2-5% of a corrosion inhibitor, 12-15% of phytic acid, 1-2% of citric acid, 2-5% of ethanol and the balance of deionized water. The finally prepared reed has a hydrophobic surface and good corrosion resistance.

This invention discloses a porous personalized implant and its manufacturing method. The porous personalized implant includes an abutment and an implant body. The abutment is disposed on top of the implant body and connected to it via a neck. A threaded, porous layer is formed directly on the outer surface of the implant body. The porous layer is helical and has a non-uniform curved surface structure, resulting in an uneven surface. A porous support region is also provided on the outer surface of the neck, passing through the neck and communicating with the porous layer on the outer surface of the implant body. The porous personalized implant of this invention is integrally molded. The porous structure adopts the G-surface structure of the three-period minimal surface, solving the stress shielding and stress concentration problems of existing dental implants. Furthermore, it shortens the surgical cycle while reducing damage to the surface treatment layer during implantation, improving the osseointegration performance of the implant and meeting the needs of different patients.

The invention relates to the field of lower limb joint replacement, and provides a modular knee joint filler implantation system with a porous structure, which comprises a connector, the connector comprises a connecting part and a first Morse taper outer column, the first Morse taper outer column is arranged at one end, close to a joint prosthesis, of the connector, one end of the connecting part is connected with the first Morse taper outer column, and the other end of the connecting part is connected with the second Morse taper outer column; a Morse taper inner hole is formed in the other end of the connecting part, and the first Morse taper outer column is matched with a joint prosthesis; the filler prosthesis is conical, the outer surface of the filler prosthesis is of a porous structure, the inner surface of the filler prosthesis is of a solid structure and is provided with an inner channel, the inner channel is matched with the connector, the extension handle comprises a second Morse taper outer column, an extension matching surface and an extension rod, the second Morse taper outer column is matched with the Morse taper inner hole, and the extension matching surface is circular; a threaded inner hole is formed in the end, close to the joint prosthesis, of the second Morse taper outer column. According to the invention, the condition of secondary bone mass removal caused by the placement of the filler prosthesis is reduced, and the sinking of the bone defect after filling modification is prevented.

This invention relates to the field of medical device technology, and discloses a 3D-printed humeral prosthesis that preserves the shoulder joint. The prosthesis includes a prosthesis body, with a proximal end for connecting to the humeral head of the patient's own shoulder joint. The proximal end of the prosthesis body is ball-shaped, and a connection area is provided at the top of the proximal end, with multiple nail-like protrusions. The proximal end of the prosthesis body also has through-holes perpendicular to the connection area. The ball-shaped proximal end of the prosthesis body of this invention, with its connection area, connects to the humeral head of the patient's own shoulder joint, preserving the patient's own shoulder joint, maintaining the patient's natural range of motion and function, reducing damage to surrounding tissues, facilitating more natural movement and recovery of daily activities, and improving postoperative function. The ball-shaped connection has a large contact area, and the nail-like protrusion structure in the connection area of ​​the proximal end of the prosthesis body further increases the contact area, making the connection more stable; this contributes to the initial and long-term stability of the prosthesis implantation.

The utility model relates to the technical field of advertising equipment, and discloses a vertical advertising machine with an anti-toppling structure, which comprises an advertising machine body, an upper base is arranged on the lower side of the advertising machine body, a mounting component is arranged in the upper base, the lower side of the upper base is fixedly connected with a lower base, and the lower base is fixedly connected with the advertising machine body. A balance assembly is arranged on the lower side of the lower base, a balancing weight is fixedly mounted in the lower base, an open groove is fixedly formed in the lower base, a mounting base is arranged in the lower base, and a rotating shaft is fixedly connected into the mounting base. According to the advertising machine, the overall gravity center of the advertising machine is lowered through the balancing weight, the inclination sensor is matched to monitor the inclination state in real time, when abnormity is detected, the electric telescopic rod drives the supporting block to rapidly stretch out, the anti-skid rubber pad makes contact with the ground to form an additional supporting point, and the advertising machine is effectively prevented from toppling over; the anti-toppling performance of the advertising machine is greatly improved when the advertising machine is impacted by external force.

The invention relates to the technical field of trunk processing, in particular to a micropore electric trunk injection machine for preventing and controlling peach fruit moths and a using method thereof.The micropore electric trunk injection machine comprises an injection machine body, the injection machine body is divided into a filling gun and an impact hammer, the impact hammer comprises a grip, a sliding rod is arranged at the end of the grip, an end is arranged at the end of the sliding rod, and a drill bit is arranged at the end of the end. An impact assembly is arranged on the outer wall of the sliding rod; the perfusion gun comprises a handle, a catheter is arranged in the handle, a push rod is arranged at one end of the catheter, a connector is arranged at the other end of the catheter, an injection needle is arranged at the end of the connector, and clamping assemblies are arranged on the outer wall of the perfusion gun and the end of the impact assembly. When tree trunk injection operation is carried out, the impact hammer is aligned with an injection part and then the clamping assembly is started, the initial stability is enhanced, the impact hammer drives the impact assembly to enable the clamping force to be higher during drilling, the drilling problem is avoided, and tree trunk damage is reduced; after drilling, the clamping assembly assists in fixing the filling gun, it is guaranteed that liquid medicine is accurately injected, and tree health is promoted.

The invention relates to the field of offshore wind power, in particular to a floating wing of a floating type fan platform and a construction method of the floating wing, the floating wing comprises a shell, the shell is formed by sweeping a generatrix along a cross section contour line, the generatrix is a parabola, a hyperbolic curve, an arc or a Bezier curve, and the floating wing can be fixed to the side face of a stand column of the fan platform. According to the floating wing suitable for the floating type fan platform, the waterplane area and the buoyancy of the platform can be greatly increased, and the trim rigidity of the platform is improved, so that the anti-overturning capacity of the platform in stormy waves is remarkably improved, heaving and pitching of the platform are reduced, and the initial stability of the platform is improved. And variable loads in the marine environment can be effectively dealt with, and stable operation of the draught fan under different sea conditions is ensured. The design of the floating wings optimizes the hydrodynamic characteristics of the structure, effectively reduces the impact of waves on the platform, and improves the anti-storm capability of the platform.

The present application relates to a kind of dental implants for repairing alveolar bone defect, the dental implant includes abutment, implant and side wing, three are integrally connected;The lower part of abutment is connected with the upper part of implant and is provided with side wing, the side wing is the integrated composite structure formed by reinforcing layer and porous layer.Two side wings of the dental implant are astride on alveolar bone surface, two side wings effectively disperse stress, and two side wings produce good clamping effect to alveolar bone, avoid making dental implant sink, rotate and loosen in bone alveolar bone, provide better initial stability.And the porous layer of side wing plays the role of bone graft, the shape and size of porous layer can be designed according to the shape and size of alveolar bone bone defect part.The implant of the dental implant and the porous layer of side wing have multi-scale aperture porous structure, promote bone tissue to grow into porous structure, so that implant and alveolar bone form bone integration, realize long-term biological fixation.