97results about How to "Avoid secondary surgery" patented technology

The invention relates to a tissue sealant and a preparation method and application thereof. The sealant mainly comprises hydrophilic raw material, nucleophilic raw material, a marker and physiological thinner, wherein the hydrophilic raw material mainly refers to the derivatives of polyethylene glycol and the nucleophilic raw material mainly refers to polyamino acid. The preparation method includes: physically mixing the hydrophilic raw material, the nucleophilic raw material, the marker and the physiological thinner through a mixing tool, and performing covalent cross-linking to form hydrogel. The tissue sealant has the advantages that the sealant mainly used for sealing small wounds after eye surgery is good in tissue cohesive force and film-forming property, good in biocompatibility, capable of promoting epithelization healing and preventing seepage leakage, simple in preparation method, capable of being quantified to form a stable production line, and good in clinical application value.

The invention provides an artificial dental abutment, an artificial dental multi-part implanting system and an implanting method. A crown connection section and an implant connection section are respectively arranged at two ends of the artificial dent abutment, wherein the included angle of the axis of the crown connection section and the axis of the implant connection section is 10-30 degrees. The artificial dental abutment can adapt to various oral implanting conditions and angles. An artificially implanted tooth has a harmonious and beautiful repairing effect with surrounding tissues and remained dentition by adopting the abutment. The invention discloses an artificial dental multi-part implanting system comprising the artificial dental abutment, wherein the implant is a multi-part and nonsubmerged technology combined implant, is high in stability and strength, and can adapt to various oral implanting conditions and angles, can be used for effectively reducing the local stress, shortening the healing time and reducing the hurt of patients.

The invention discloses an easily-removing implant device and a screwing-out tool thereof. The easily-removing implant device comprises an implant, a base station and a central bolt; the easily-removing implant device is characterized in that the implant comprises a gum-penetrating neck part and a head part, wherein a thread is formed on the outer surface of the head part, at least two spiral self-tapping grooves are also formed in the outer surface of the head part, a connecting hole coaxial with the implant is formed in the implant, the connecting hole comprises a tapered hole, an anti-rotation hole, an implant taking-out section and a blind threaded hole, which are sequentially connected coaxially, the base station comprises a dental crown connecting section and an implant connecting section, the implant connecting section comprises a conical table and an anti-rotation column, a stepped hole matched with the central bolt is formed in the base station, and the central bolt penetrates through the stepped hole to be connected with the blind threaded hole, so that the base station and the implant are fixed integrally. According to the easily-removing implant device, the implant taking-out section with a reverse thread is additionally arranged in the implant, the problem that a part of the implant, which is remained in dentale due to fracture of the implant, is difficult to take out is solved, and the easily-removing implant device has the advantages of simple structure, strong practicability, and the like.

A bone injury repair fixation instrument and a method of manufacturing same. A crosslinked biodegradable polymer material is adopted for the instrument. The polymer material is a homopolymer of monomers, a copolymer of multiple monomers or a blend of 2 or 3 kinds of the homopolymer and copolymer, and has a three-dimensional crosslinked network structure. The instrument comprises a bone nail, a bone screw, a bone plate or a fixing support, and has great mechanical performance, structural stability, controllable degradation speed, and excellent biocompatibility.

The invention discloses a flexible intramedullary nail, which pertains to the technical field of orthopedic medical devices and aims at providing a flexible intramedullary nail which can spare secondary operation, eliminate stress shielding, promote fracture healing and has the advantages of simple structure, practicality and low cost. The technical proposal of the invention is that a nail pole of the intramedullary nail consists of a proximal-end nail body, a distal-end nail body and a spring body, wherein, the proximal-end nail body and the distal-end nail body are positioned at both ends of the nail pole respectively and a proximal-end fixed screw hole and a distal-end fixed screw hole are arranged on the two ends; the spring body is arranged in the middle of the nail pole and both ends of the spring body are tightly connected with the proximal-end nail body and the distal-end nail body respectively; the length and quantity of the spring body can be adjusted according to the characteristics of a long bone and the diameter of the spring body can be 2mm to 6mm and can be adjusted according to the requirements of fracture fixing. The flexible intramedullary nail has simple structure and innovative design, resolves the problems of eliminating stress shielding, promoting fracture healing, avoiding secondary operation, and the like after the intrameduallary nail is put in the body, and also has the advantages of simple structure, practicality and low cost.

The invention belongs to the technical field of intelligent materials, nanocomposite functional materials and biomedical materials and discloses a photothermal drive type shape memory multiscale porenanocomposite biological scaffold and a preparation method thereof. The method comprises the following steps: (1) performing hydrophobic modification on graphene oxide by low molecular weight carboxyl-terminated polylactic acid to obtain hydrophobic modified graphene oxide; (2) adding the hydrophobic modified graphene oxide, a biodegradable shape polymer and a rheological agent to an organic solvent to form an oil phase; adding water to the oil phase, performing mixing and emulsification to obtain a water-in-oil type viscous pickering emulsion; and (3) obtaining a 3D porous emulsion scaffold by extrusion type 3D printing with the water-in-oil type viscous pickering emulsion, and performing drying to obtain the composite biological scaffold. The scaffold consists of multiscale pores and hasthe porosity of 65%-95%; and the scaffold has good shape memory performance under two stimulations of heating and near infrared light irradiation and has good application prospects in the tissue engineering field.

The invention discloses a biodegradable lacrimal duct embolus and a preparation method thereof. The lacrimal duct embolus is prepared by using one or more of a lactide/caprolactone copolymer, a glycolide/caprolactone copolymer, a lactide/dioxane ketone copolymer and a lactide/trimethylene carbonate copolymer as raw materials through the following steps of sequentially carrying out melt extrusion,hot stretching and cold cutting on the raw materials in an inert gas atmosphere. The biodegradable lacrimal duct embolus is used for treating dry eye syndromes; in the process of operation, a part ofthe lacrimal duct embolus is implanted into a lacrimal duct, and the rest of the lacrimal duct embolus can automatically be shrunk into the lacrimal duct, therefore, in the process of operation, a patient feels no pain, the diameter of the lacrimal duct of the patient is not required to be measured before operation, and the lacrimal duct embolus in one product specification can be suitable for the lacrimal ducts in different sizes; in the process of preparing the biodegradable lacrimal duct embolus, the embolus can load anti-inflammatory agents, antibiotics and antiproliferative drugs so as to avoid the generation of complications such as inflammations, wrapping and the like; and in addition, the lacrimal duct embolus is good in biocompatibility and can be completely biodegraded in the lacrimal duct, and the final products of the embolus are non-toxic water and carbon dioxide, thereby avoiding secondary surgery of the patient.

The invention discloses a repair system applied in a craniocerebral operation. The system is characterized by comprising movable repair patches, wherein the repair patches are overlaid to form a movable topological structure; the movable topological structure can expand with increased intracranial pressures and can retract with decreased intracranial pressures; and a topological system is composed through arrangement of the multiple repair patches, and the system can expand or retract with intracranial pressure changes. The repair system can be reset after an intracranial pressure of a patient returns to normal after the operation and can finally become consistent with the form of a skeletal flap of the patient removed during the operation. Through application of the repair system, traumas and economic burdens caused to the patient by a second-time operation in a traditional treatment scheme can be avoided; and possible infection and complications such as epilepsy caused by the second-time operation to the patient can be avoided.

The invention relates to the technical field of medical apparatuses, in particular to a spine dynamic growth rod, which comprises at least one connecting rod, one conical elastic clamping sleeve, one sleeve cylinder and one cover plate. When one connecting rod is used, a conical hole is formed in one end of the sleeve cylinder, a circular hole is formed in the other end of the sleeve cylinder, the connecting rod is arranged in the sleeve cylinder in a clearance fit way through the conical elastic clamping sleeve, and the sleeve cylinder is connected with a cover plate; when two connecting rods are used, conical holes are formed in the two ends of each sleeve cylinder, a circular hole is formed in the middle part of each sleeve cylinder, the two connecting rods are symmetrically arranged, the symmetrical end surfaces are respectively provided with a limiting block, the two connecting rods are respectively arranged in the sleeve cylinders in the clearance fit way through the corresponding conical elastic clamping sleeve, and the two ends of each sleeve cylinder are connected with the corresponding cover plate by threads. The spine dynamic growth rod has the advantages that by utilizing the simple conical structure, the dynamic growth rod grows along with the growth of a patient, so the pain of the patient caused by secondary operation and multiple operations because of growth is avoided; by selecting a one-way growth mode and a two-way growth mode, the operation time of the doctor is effectively shortened, and the foreign body sensation of the patient in the use process is effectively reduced.

The invention relates to a negative-pressure double-sleeve drainage tube which comprises an outer sleeve and an inner dredging sleeve. The negative-pressure double-sleeve drainage tube is characterized in that a plurality of convex strips are evenly distributed on the inner side wall of an inner section of an outer sleeve body in the circumferential direction, holes are formed in the centers of the convex strips, the holes of the convex strips converge with and are communicated with a channel formed in the outer end side wall of the outer sleeve body, a circle of groove is formed in the inner wall of an outer section of the outer sleeve body in the circumferential direction, and an opening, corresponding to the channel, is formed in the groove and is communicated with the channel. After the technical scheme is adopted, it is ensured that the in-cavity position of the outer sleeve is not moved, various blockages such as blood clots, tissue fragments and mixed proteins are simply and effectively cleared, smooth drainage is easily restored, passive drainage is safely and efficiently changed into initiative drainage, a best drainage effect is achieved and is the priority among priorities of conservative treatment means, and accordingly possible second operation is avoided.

The invention discloses a medical internal fracture fixation needle and a medical fracture fixation tool. The medical internal fracture fixation needle is made of biodegradable magnesium or magnesiumalloy materials, and comprises a needle head, a needle body and a needle tail, wherein the needle head is conical so that an internal fixation needle can be inserted into a bone hole; the needle bodyis cylindrical, and a clamping structure is arranged on the needle body, and is used for achieving locking of the needle body after the internal fixation needle is inserted into the bone hole; multiple tail vane structures arranged at intervals are arranged on the surface of the needle tail, the ends, away from the needle tail, of the tail vane structures are pointed, so that the tail vane structures are inserted into the bone hole to achieve the anchoring effect, and a sliding groove for achieving the guiding effect is formed between every two tail vane structures. By means of the medical internal fracture fixation needle and the medical fracture fixation tool, the discomfort of a patient in the application process is reduced while a fixation operation can be conveniently carried out on the patient, and a second operation is avoided; as a degradation product of magnesium and magnesium alloy is alkalescency, stem cells can be better differentiated into osteoblast, generation of new bones is facilitated, and fracture healing is promoted.