The invention relates to a multimaterial rod for fixing bone fractures, meant to be used in the field of orthopaedic surgery. According to the invention, the multimaterial rod comprises a bone fixing part (1) made of biocompatible Mg alloys, with normal thread at the end towards the other component (2) of the rod, while, at the other end, the thread is pointed, in order for it to penetrate the bone, and a rod-type component (2) made of austenitic stainless steel, having the same diameter as the first component (1) and threaded at one end, the two components (1 and 2) of the rod being assembled by a ceramic sleeve (3) made of alumina or zirconia, which is externally ribbed to be easily screwed in and internally threaded, between the two threads there being a smooth zone meant to prevent the galvanic corrosion generated by putting together the Mg alloy and the austenitic stainless steel.
SEMICONSTRAINED TOTAL ELBOW PROSTHESIS MADE OF SHAPE-MEMORY ALLOYS, WITH COUPLING SYSTEM BASED ON SHAPE-MEMORY EFFECT
BATALU NICOLAE-DAN; SEMENESCU AUGUSTIN; COSTOIU MIHNEA COSMIN; ANTONIAC VASILE-IULIAN; DOICIN CRISTIAN-VASILE; AMZA CĂTĂLIN GHEORGHE; MATEŞ ILEANA MARIANA; CHIVU OANA-ROXANA; CODOREAN ION BOGDAN; BARBU CĂTĂLIN-ALEXANDRU; BĂDICĂ PETRE; NEGOIŢĂ OLIVIA-DOINA
The invention relates to a semiconstrained total elbow prosthesis made of TiNi biocompatible shape-memory alloys meant to replace the human elbow joint affected as a consequence of accidents or bone or joint diseases. The prosthesis, as claimed by the invention, has two components: a. an ulnar component (1) which is fixed in the medullary canal of the ulna and consists of a fixation rod of truncated pyramid shape, with a length of 50...200 mm, with a square-shaped end cross-section having a side of 3...10 mm and an angle of flaring of 1...5° towards the cylindrical end in which the articulation recess is cut out, the fixation rod having rounded edges at one end and the other end being transverse cylindrical with a diameter of 7...20 mm and a length of 10...30 mm, b. a humeral component (2) which is first fixed on the humeral bone canal and which comprises a fixation rod with a length of 50...200 mm, with a square-shaped end cross-section having a side of 3...10 mm and an angle of flaring of 1...5° towards the attachment extension, with a flange for external support onto the bone with a length of 10...20 mm, a width of 5...10 mm and a thickness of 2...5 mm and an attachment extension with a length of 5...10 mm, a thickness of 3...10 mm, and the circular bending angle of 175...260°, all the edges being rounded, with a radius of curvature ranging between 0.1...2 mm, the winding of the attachment extension of the humeral component (2) on the recess in the transverse end of the ulnar component (1) being carried out by activating the shape-memory properties of the alloy, meaning that the open position is activated at a low temperature of 1...3°, and the closed position is activated at a temperature slightly lower than the temperature of the human body, namely between 30...33°C.
DENTAL ALLOY OF CO-CR TYPE ALLOYED WITH BIOCOMPATIBLE METALS WITH RESISTANCE TO HIGH CORROSION
ANTONIAC VASILE IULIAN; RAU DZHULIETTA; SEMENESCU AUGUSTIN; DAWOD NAZEM; GEANTĂ VICTORAŞ; VOICULESCU IONELIA; MATEŞ ILEANA MARIANA; ŞOLEA MARINA ROXANA
The invention relates to a dental alloy of CoCrMB type, where MB are the biocompatible metals Zr, Nb, Ag and Ru, prepared by elaboration in arc electric furnace in neutral atmosphere, the alloy with a high biocompatibility being used in dental prosthetics for making dental metal-ceramic prostheses. According to the invention, the alloy has the following chemical composition, expressed as percentage by weight: 47 ... 53% Co, 22 ... 26% Cr, 4 ... 7% Mo, 0.9 ... 1.2% Si, 3 ... 5% Nb, 0.8 ... 1.1 % Ru, 10 ... 14% Zr, 2 …4% Ag, together with other elements, in various percentage variations.
ORTHOPEDICAL SCREW ROD AND PROCESS FOR INCREASING BIO-COMPATIBILITY
UNIVERSITATEA POLITEHNICĂ DIN BUCUREŞTI
ANTONIAC VASILE IULIAN; SEMENESCU AUGUSTIN; LAPTOIU DAN CONSTANTIN; MARIN ALEXANDRU; HADAR ANTON; GHIBAN BRÂNDUŞA; GHIBAN NICOLAE; IONESCU LIVIU VICTOR; ALIONTE CRISTIAN GABRIEL; ALUPEI COJOCARIU OVIDIU DORIN
The invention relates to an orthopedical screw rod for being fixed into fractured bones, meant to be used for human or animal surgery intervention. According to the invention, the rod has a length ranging between 150...220 mm and it consists of a cone-shaped point (1), which has, in the median area, a threaded segment which is continued with a threaded section (2), both being adapted in order to be implanted into the bone cortical area, the threading being performed by means of the cone-shaped end (3) and a handle (4) between which there is a recess (5) needed for facilitating the shortening of the orthopedical screw rod, the handle (4) being provided with some grooves (6) which give the rod a self-threading character, the diameters of the threaded section (2) and the handle (4) being in the ratios ranging between 2/3...5/6, the length of the threaded section (2) being approximately 30...40% of the total length of the orthopedical rod, and the point (1) having cut some longitudinal channels (7) with the role of protecting the bone marrow white while inserting the rod, the length ranging between 10...20% of the length of the threaded section (2).
ALLOY OF CO-CR TYPE ALLOYED WITH RUTHENIUM AND OTHER NOBLE METALS, FOR METAL-CERAMIC DENTAL PROSTHESES
ANTONIAC VASILE IULIAN; RAU DZHULIETTA; SEMENESCU AUGUSTIN; DAWOD NAZEM; GEANTĂ VICTORAŞ; VOICULESCU IONELIA; MATEŞ ILEANA MARIANA; ŞOLEA MARINA ROXANA
The invention relates to a CoCrMN type alloy, where MN are noble metals Ru, Zr and Ag, obtained by elaboration in an arc electric furnace, in neutral atmosphere, with or without magnetic levitation, the alloy with a high biocompatibility being used in dental applications, namely for manufacturing metal-ceramic prostheses. According to the invention, the alloy has the following chemical composition expressed as percentage by mass: 58 ... 61% Co, 28 ... 30% Cr, 3.4 ... 4.4% Si, 2 ... 4% Ru, 0.7 ... 1.4% Zr and 0.8 ... 1.2% Ag.
CRANIAL IMPLANT WITH OSTEOINTEGRATION STRUCTURES AND FUNCTIONAL COATING
ANTONIAC VASILE IULIAN; MOHAN AUREL GEORGE; SEMENESCU AUGUSTIN; DOICIN CRISTIAN VASILE; ULMEANU MIHAELA ELENA; COSTOIU MIHNEA COSMIN; CAVALU SIMONA; MURZAC ROMAN; DOICIN IRINA ELENA; SĂCELEANU MIRCEA VICENŢIU; MATEŞ ILEANA MARIANA
The invention relates to a mesh-type cranial implant made of Ti or biocompatible Ti alloys, having functional coating based on selenium and/or hydroxyapatite nanoparticles with role of osteointegration, to be used for cranioplasty and reconfiguration in big cranial defects generated by accidents, congenital anomalies, surgical extraction of tumours or other affections. According to the invention, the implant has a geometrical structure obtained based on mathematical modelling and simulation with specialized software products, and consists of a fixed layer (1) assembled with a mobile layer (2), the layers (1 and 2) being made of some osteointegration modules (3), each consisting of four basal cells (6) placed in layers, the modules (3) being connected to one another through rigid connecting bridges (4) aligned on the direction S, and through flexible connecting bridges (5) aligned on the direction S, so that the two directions intersect each other on the longitudinal axis of the implant under an angle α , the two bridges (4 and 5) together with the basal cells (6) having a porous structure and a geometry which enables the adsorption of the impregnated active substances and the proliferation of the osteoblast cells, where, for obtaining a Se nanostructured surface, the implant is immersed into a reaction medium starting from the NaHSeOprecursor and using as reducing agents various molecules from sugar category, such as starch, lactose, galactose or fructose, the ratio between NaHSeO/sugar being 1 : 4 for starch, 1 : 6 for lactose and 1 : 12 for galactose and fructose, a chemical hydro-thermal reaction takes place under magnetic stirring, resulting in a colloidal solution in which the implant is introduced for 10 min, at a temperature of 120°C, and exposed to some chemical reactions, after which the implant is extracted, washed with deionised water, subjected to a treatment with ultrasounds for 5 min and dried.
CRANIAL ENDOPROSTHESIS WITH SLIDING SYSTEM
UNIVERSITATEA POLITEHNICA DIN BUCUREŞTI
DOICIN CRISTIAN VASILE; ULMEANU MIHAELA ELENA; SEMENESCU AUGUSTIN; ANTONIAC VASILE IULIAN; COSTOIU MIHNEA COSMIN; MITRICĂ MARIAN; MURZAC ROMAN; CHIRTEŞ ALIN; DAVIŢOIU DRAGOŞ VIRGIL
The invention relates to a cranial endoprosthesis with a sliding system used to repair trauma-type defects of the brain case, by cranioplasty surgical procedure. According to the invention, the endoprosthesis consists of an upper sliding layer (1), a lower sliding layer (2) and a fixing system (3), the sliding layers (1 and 2) consisting of mobile cells (4) with a sliding system, the endoprosthesis being positioned in relation to a schematic model (5) of the brain case which exhibits an orifice caused by a cranio-cerebral trauma, where, for assembling the endoprosthesis, the lower sliding layer (2) is positioned in non-sliding state, tangent to the lower surface (6) of the brain case, and for sliding and engaging the mobile cells (4), comprised in the lower layer (2), the actuating key (7) positioned on a longitudinal direction in relation to the lower sliding layer (2) is used, and, upon rotation of the key (7), the layer (2) slides into the final position while remaining tangent to the lower surface (6) of the brain case, the upper sliding layer (1) is similarly positioned, but at the surface of the brain case, the fixing system (3) consisting of a clamping flange (17) and a fixing pin (18) allowing the orientation, positioning and fastening in relation to the sliding layers (1 and 2) by means of the fixing cover (20) and the fixing base plate (22), they being finally assembled when the toroidal surface of the fixing pocket (19) gets in contact with the conjugated surface of the protuberance (21).
TOTAL CONSTRICTED ELBOW PROSTHESIS MADE OF SHAPE-MEMORY ALLOY WITH HINGE-LIKE FIXATION AND COUPLING SYSTEM BASED ON SHAPE-MEMORY EFFECT
BATALU NICOLAE-DAN; SEMENESCU AUGUSTIN; COSTOIU MIHNEA COSMIN; SINESCU IOANEL; ANTONIAC VASILE IULIAN; DOICIN CRISTIAN-VASILE; CODOREAN ION BOGDAN; MATEŞ ILEANA MARIANA; BARBU CĂTĂLIN-ALEXANDRU; BĂDICĂ PETRE; GAVRILIU TRAIAN-ŞTEFAN
The invention relates to a total constricted elbow prosthesis made of biocompatible shape-memory metal materials and polymer materials, the prosthesis being meant to replace the human elbow joint affected as a consequence of accidents or bone and joint diseases. The claimed prosthesis comprises an ulnar component (1) made of CoCr, TiAlV, TiNi alloys or other equivalent alloys, which is fixed in the medullary channel of the ulna and consists of a fixation rod of truncated pyramid shape with a length of 50...200 mm, with a square-shaped end cross-section with a side of 7...20 mm and an angle of flaring of 1...5° towards some attachment eyelets, with rounded edges, with an end with rounded edges and a transverse cylindrical end having a diameter of 7...20 mm and a length of 10...30 mm, the passage from the rod to the cylinder being carried out smoothly, by means of connections, the transverse cylindrical end being symmetrically continued in both directions with two cylindrical axles with a radius of 4...10 mm and a length of 7...20 mm on which some polymer or ceramic rings (2 and 3) will be fixed, each axle ending with a disk with rounded borders having a diameter of 9...25 mm and a thickness of 2.5...4 mm which limits without blocking the axial displacement of the humeral component (4) which is fixed on the humeral bone and which comprises a fixation rod with a length of 50...200 mm, with a square-shaped end cross-section with a side of 3...10 mm and an angle of flaring of 1...5° towards some attachment eyelets, an element of support on the bone with a length of 10...20 mm, having an intermediary paralellepipedal element and some attachment eyelets which remain in the closed position, being wound on the rotation axle of the ulnar component (1), at a temperature slightly below the temperature of the human body, i.e. 30...33°C and being unwound into open position at low temperatures of 1...2°C, for revision.
ACETABULAR MILLING DEVICE
NICULESCU MARIUS; ANTONIAC VASILE IULIAN; SEMENESCU AUGUSTIN; DOICIN CRISTIAN-VASILE; ULMEANU MIHAELA-ELENA; COSTOIU MIHNEA COSMIN; MURZAC ROMAN; MATEŞ ILEANA MARIANA; DAVIŢOIU DRAGOŞ-VIRGIL
The invention relates to an orthopedic milling device intended to remove osteophytes without the risk of breaking the acetabular part of a hip endoprosthesis, meant to be applied in the field of orthopedic surgery. According to the invention, the device comprises a collecting cup (1) and a face milling cutter (2), assembled by means of a quickly-interchangeable bushing (3), the milling cutter (2) having a central rod (4) provided with some orifices, which is screwed into the collecting cup (1) and locked for setting the machining zero level, by a locking screw (5), two attachment rings (6 and 8), namely an external one and an internal one, respectively, a helical spring (7), a main body (9) and an operating key (10).
The invention relates to a femoral non-case-hardened component, of the total hip prosthesis, meant to replace a natural coxo-femoral joint, in case of affections thereof, said component, in order to use some biocompatible accesible materials and to increase the total prosthesis reliability, in order to assure a fast and easy recovery, is made of a body (1) having a flat, elongated shape, with a pistol configuration, with the distal part continued by a "dovetail"-type prosthesis (7) of a sortable length, at the upper side provided with a one-way enlarged shoulder (2) having a hollow shape, where 6...9 quadrilateral-shaped and deltoid openings (3) are cut, generating a lattice-girder-like structure, said structure respecting the anatomic structure of the metaphysis area of the femur.
The invention relates to a discontinuous regenerative firing plant, having more firing modules (C), comprising, for each module (C) two reactivators (9a and 9b) with ceramic balls, connected to two ceramic burners (1a and 1b), provided with some pilot burners (7a and 7b), by means of a postcombustion chamber (8a and 8b), these being joined through some connecting pipes (11a and 11b), serially connected through an electrically operated valve (12), where the burners (1a and 1b) include in their construction a ceramic pipe (4a and 4b respectively), provided with some paddles (5a and 5b respectively), for the vortex generation of the combustion air and the reduction of the parasitic fluids quantity, the fluid carriage in this process being achieved by using the empty space created by introducing compressed air through some connections (16a and 16b respectively), into some Venturi-type ejectors (15a respectively 15b), coupled to the reactivators (9a and 9b) through some pipes (13a, 13b, 13c, 13d and 17a, 17b, 17c, 17d) and some electrically operated valves (14a, 14b, 14c, 14d and 18a, 18b, 18c, 18d).
The invention relates to a knee orthosis with magnets which creates a magnetic field using several permanent magnets fixed on a classic knee orthosis worn by a patient during the treatment, the said orthosis being useful in the treatment of knee cartilage lesions after having previously introduced therein a visco-elastic active substance which contains magnetic nanoparticles bio-functionalized by hyaluronate coating. According to the invention, the orthosis consists of a classic orthosis () having, in the knee joint area, a centering recess () on top of which there is placed a complement covering () provided with some pockets () which are fixed to the complement covering () by some attachments (), wherein the magnets () are introduced, some other attachments () being located in the medial magnet area, the pockets () ending at their top part with some resilient elements (), while some resilient tapes () are placed on the perimeter of the classic orthosis (), the magnets being placed at a certain distance () in the vertical plane and having, in the horizontal plane, an angle () therebetween.
The invention relates to a bioresorbable self-tapping cannulated screw made of a composite material of the polymer-ceramics type, i.e. poly-L-lactic acid and tricalcium beta-phosphate, for the fixation of soft tendinous tissues or bone-tendon-bone grafts during joint reconstruction surgery. According to the invention, the screw () comprises, at its distal end which represents the screw tip, a cone-shaped zone () provided with a double-pitch thread with three self-tapping channels () of constant depth, stretching all along the said zone. At the proximal end, the screw has a cylindrical shape () of a length which is equal with two thirds of its total length, provided with a double thread having a constant pitch allover its length, continued up to 1 mm from the proximal end (), so that the screw can be completely inserted into the bone. In the truncated cone-shaped part of the screw, the thread () is more aggressive in order to easily penetrate the cortical bone, while, in the cylindrical part, the thread () has a larger leading angle in order to prevent the graft damage. The screw is cannulated, having inside a hexagonal channel whose size is variable along the screw length.
BIOMIMETIC BIODEGRADABLE COMPOSITION MEANT FOR OSSEOUS IMPLANTS
UNIVERSITATEA BABEŞ-BOLYAI DIN CLUJ-NAPOCA - INSTITUTUL DE CERCETĂRI ÎN CHIMIE RALUCA RIPAN
MOLDOVAN MARIOARA; MUŞAT OLGA; ANTONIAC VASILE IULIAN; PREJMEREAN CRISTINA; TRIF MARCELA; SAROŞI CODRUŢA; BOBOIA STANCA; SILAGHI-DUMITRESCU LAURA
The invention relates to a biomimetic biodegradable composition for making osseous implants, consisting of an organic phase comprising 30...70% hydroxyethylmethacrylate, 30...70% polycaprolactone dimethacrylate, 0.5...3% diethylene glycol dimethacrylate within which there is dispersed an inorganic material comprising 40...60% hydroxyapatite or tricalcium phosphate previously treated in order to create an affinity to the filler/polymer matrix interface. The composition as claimed is made of two components to be mixed before use and to be cured in a dual system of chemical and photochemical UV polymerization.
METHOD AND INTELLIGENT SYSTEM BASED ON X RAYS FOR TRAINING SURGEONS IN INSERTING PEDICLE SCREWS
UNIVERSITATEA POLITEHNICA DIN BUCUREŞTI
POPESCU DIANA; AMZA CĂTĂLIN GHEORGHE; LAPTOIU DAN CONSTANTIN; AMZA GHEORGHE; SEMENESCU AUGUSTIN; ANTONIAC VASILE IULIAN; CICIC DUMITRU TITI
The invention relates to a method and an intelligent system based on X rays for training the surgeons in inserting pedicle screws into the spine. According to the invention, the method uses some polyurethane vertebrae as working models and follows the stages of: identification, on the vertebra, of the entry point for the pedicle screw and the selection of the diameter and the length thereof, drilling the vertebra and the insertion of the screw, acquisition and processing the X ray image, determination of the value for the insertion trajectory deviation in relation to the pedicle axis and including it or not within the safety zone, by means of the computer, by using special software based on an algorithm which uses a Hopfield neural network for segmenting the image and displaying the deviation value and the corresponding evaluation messages. According to the invention, the system comprises a set of test-vertebrae () made of polyurethane (), a roentgenography apparatus () for the X ray image acquisition and a computing unit () with special software for processing the images in order to segment the same by applying an algorithm based on a Hopfield neural network (with automatic extraction of the pedicle screw image as separate object, followed by the computation of the main attributes of the resulting image), the computing unit () having an image acquisition subsystem (), an image pre-processing subsystem (), an image segmentation subsystem (), a high level detection subsystem () and a knowledge/data base ().