38 results about "Posterior column" patented technology

The invention is directed to a composite bone graft for implantation in a patient, and methods of making and using the composite bone graft, along with methods for treating patients by implanting the composite bone graft at a site in a patient. The composite bone graft includes two or more connected, discrete, bone portions, and includes one or more biocompatible connectors which hold together the discrete bone portions to form the composite bone graft. The composite bone graft may include one or more textured bone surfaces. The textured surface preferably includes a plurality of closely spaced protrusions, preferably closely spaced continuous protrusions. The composite bone graft is useful for repairing bone defects caused by congenital anomaly, disease, or trauma, in a patient, for example, for restoring vertical support of the anterior and/or posterior column. Implantation of the composite bone graft results in improved graft stability and osteoinductivity, without a decrease in mechanical strength. The composite bone graft does not shift, extrude or rotate, after implantation. The present composite bone graft can be appropriately sized for any application and can be used to replace traditional non-bone prosthetic implants.

The invention discloses an acetabulum parastyle and posterior column united steel plate. The united steel plate is composed of a main plate, a parastyle steel plate and a baffle which are connected into a whole. At least two threaded holes are formed in the main plate and are arranged along the bow-shaped edge from the proximately-bow-shaped edge face of the fossa iliaca. The axis of each threaded hole is vertical. One side of the main plate is bent downwards and extends to the square area above the ischial spine to form the baffle. The curved surface formed by the lower surface of the baffle and the lower surface of the main plate is matched with the curved surface formed by the corresponding proximately-bow-shaped edge face of the fossa iliaca, the surface of a bow-shaped edge from the front edge of the sacroiliac joint and the surface of the square area above the ischial spine of the acetabulum bone. A plurality of fixed screw holes are formed in the baffle. The parastyle steel plate extends to the ramus superior ossis pubis from one end of the main plate along the surface of the proximately-bow-shaped edge face of the fossa iliaca. A parastyle fixing screw hole is formed in the parastyle steel plate. The bone fracture plate is easy and convenient to operate, high in safety, small in operation wound, and capable of being used for simultaneously drawing in fractured acetabulums of the parastyle and the posterior column.

A three column spinal fixation implant, including: an anterior cage configured to be disposed in an intervertebral space between adjacent vertebral bodies in a spine of a patient; an anterior plate coupled to the anterior cage; a pair of anterior screws coupled to the anterior cage and the anterior plate and extending posteriorly from the anterior cage and the anterior plate through a portion of one or more of the adjacent vertebral bodies and into or through posterior bony structures of the spine of the patient; a pair of anterior screws coupled to the anterior plate and extending posteriorly from the anterior plate through a portion of one or more of the adjacent vertebral bodies and into or through posterior bony structures of the spine of the patient; a plurality of posterior headbodies coupled to the anterior screws opposite the anterior cage and the anterior plate; and one or more connecting structures coupled to the plurality of posterior headbodies; wherein the three column spinal fixation implant provides structural stability to the spine of the patient across a first anterior column, a second middle column, and a third posterior column thereof.

An automatic Maxillary Expander, which is a bone-borne distractor for expanding the maxillary bone in adult and adolescents having transversal maxillary hypoplasia. It fixes itself to the palatal vault in a way without any need for screwing, by the asymmetrical triangular prism-shaped spikes on the anterior, posterior columns. Both being hygienic and not wasting a bulky space in the mouth, it provides a high patient comfort. The maxillary expanding process does not interrupt orthodontic treatment of patients and minimizes damage to the texture of the mouth. An automatic Maxillary Expander Transferring Apparatus enables the practitioner to place the Automatic Maxillary Expander into the palatal surface with ease and precision into the palate under local anesthesia quickly, without any surgical operation. In addition, this apparatus is composed of a very simple mechanism. It has rounded ends in order not to hurt the practitioner or patient.

A manufacturing method for a posterior column lag screw 3D navigation module used for acetabulum fracture comprises the following steps that A, according to simulation reestablishing, 3D reestablishing is performed according to pelvis thin layer CT scanning data of an object with the acetabulum fracture so as to obtain an original 3D reestablished model, on the basis of the original 3D reestablished model, fracture block division is performed along the fracture line, and the femur head is removed so as to obtain a fracture block separation model, and on the basis of the fracture model, a single fracture block 3D space position is adjusted to recover the normal anatomic form of the acetabulum, so that a fracture reduction model is obtained; B, according to virtual posterior column slag screw implanting simulation, on the basis of the fracture reduction model, a posterior column slag screw implanting fracture reduction model is simulated with a cylinder on the fracture reduction model; C, according to obtaining of a navigation module simulation body, the navigation module simulation body is established according to the cylinder, so that the navigation module simulation body with screw channels is obtained; D, the navigation module is obtained through 3D printing. The manufactured navigation module has the advantages that the manufacturing technology is simple, precision is high, and safety is good.

The invention discloses a self-locking acetabular posterior-wall posterior-column anatomical steel plate which comprises a steel plate body, a self-locking bolt and an auxiliary sleeve pipe, wherein the auxiliary sleeve pipe is used for controlling the installation of the steel plate body, and a locking-hole internal thread is respectively manufactured at the tops of a first self-locking hole, a second self-locking hole and a third self-locking hole; an external thread is respectively manufactured on the self-locking bolt and the auxiliary sleeve pipe, and the external thread can be in corresponding spinning fit with the locking-hole internal thread; the design per se permits appropriate torsion and bending in a three-dimensional space, is convenient for molding so as to be better fitted with individualized bones and is used for bearing the moving loads of joints, so that fractures are normally healed, and complications, such as fracture later-looseness, shift, pains, bone stress shielding and the like are reduced; the success ratio of fracture internal fixation operations is improved, the molding in the operations is avoided, the blood loss in the operations is reduced, the anesthetic time is reduced, the infected chances are reduced, and the operative risk is lowered; and the interference of built-in materials for sciatic nerves in the internal fixation of the operations is reduced.

The invention relates to a posterior fixing steel plate for fracture of acetabular anterior and posterior columns. The posterior fixing steel plate comprises a plate body covering the back wall of the acetabular posterior column; the plate body extends downwards to the root of an ischial spine from the upper part close to the top end of a greater sciatic notch along the inner side edge of the acetabular posterior column and then is bent and extends to the lower part of the top end of an ischial tuberosity; an anterior column threaded hole for being connected with a guide sleeve is formed in the end, at the top end of the greater sciatic notch, of the plate body, and the axis of the anterior column threaded hole points to the acetabular anterior column through sclerotin between an acetabular fossa and a square area; a posterior column threaded hole used for being connected with the guide sleeve is formed in the other end of the ischial tuberosity and the axis of the posterior column threaded hole points to the tail end of the ischial tuberosity through sclerotin in the ischial tuberosity; a plurality of fixing screw holes arranged along the plate body are formed between the anterior column threaded hole and the posterior column threaded hole; a limiting hook hooked to the upper part of the greater sciatic notch is arranged on the side edge, which is close to the greater sciatic notch, of the end and corresponding to the anterior column threaded hole, of the plate body.

The invention discloses a fixing device for fractures of anterior and posterior columns of acetabulum and a use method for the fixing device. The fixing device comprises an arcus marginalis steel plate, a pubis steel plate and a posterior column side wall, wherein the integral shape is matched with anatomical structures of the inner sides of the anterior and posterior columns of acetabulum; the arcus marginalis steel plate is matched with the structure of arcus marginalis, and extends toward fossa iliaca to form the posterior column side wall; the pubis steel plate is matched with the anatomical structure of the inner side of superior pubic ramus; a pubis side wall extends toward the upper surface of the superior pubic ramus at a position near pubic tubercle; a plurality of screw holes are formed in the arcus marginalis steel plate and the pubis steel plate; the arcus marginalis steel plate and the pubis steel plate are fixed at the acetabular dissection positions by planting screws. According to the fixing device and the method disclosed by the invention, the fractures of the upper parts of the anterior and posterior columns and a quadrilateral area of acetabulum can be stably fixed, so the quality of fracture reduction and internal fixation is improved.

The invention discloses a semi-self-locking acetabulum posterior wall and posterior column anatomical plate which comprises a steel plate main body, a self-locking sleeve and self-locking screws, wherein the steel plate main body is sequentially provided with a first fixing region, a first location region, a main fixing region, a second location region and a second fixing region, the main fixing region is provided with self-locking screw holes, the first fixing region and the second fixing region are provided with non-self-locking screw holes, and the first location region and the second location region are provided with location holes. The invention can be properly twisted and bended and is in convenient moulding so as to be better jointed to a skeleton to bear joint motion load, enable the fracture to be normally healed and reduce complications such as loosening, displacement, pains, bone stress shielding and the like at a later stage of fracture. The invention has the advantages ofhaving less internal stress and relatively according with acetabulum anatomy and biomechanics, enhances the success rate of a fracture internal fixation operation, avoids moulding in the operation, saves the operation time, reduces the blood loss in the operation, reduces the anesthetic time and lowers the operation risks.

The invention provides a tibial plateau posterolateral bone fracture plate for a fracture at the attachment of the posterior cruciate ligament, which belongs to the field of medical devices. The tibial plateau posterolateral bone fracture plate comprises a handle-like part which is in adaptation with the proximal tibia posterior metaphysic, a main support plate part which is in adaptation with the tibia posterolateral articular lip and a side support part covering the bone surface at the attachment of the posterior cruciate ligament, wherein the front end of the handle-like is connected with the main support plate for constituting a T-shaped or L-shaped bone fracture plate whole, the bone fracture plate whole comprises a bottom side surface for being in contact with the bone and a group of screw holes, the handle-like part of the bone fracture part has a certain radian so as to enable the bone fracture plate to be completely attached on the posterior column of the tibial plateau and enable the main support plate part to be attached on the posterior lateral margin of the tibial plateau, and the side support plate part is covered on the bone surface at the attachment of the posterior cruciate. The embodiment of the invention is suitable for treatment of complex tibial plateau fractures, in particular to the fractures at the attachment of the posterior cruciate ligament, and can enable the fracture to heal better.

The invention provides a combined fixing steel plate for acetabular fractures. The combined fixing steel plate comprises a bowed-edge main plate and an auxiliary plate, wherein the bowed-edge main plate is an arc-shaped strip-like steel plate and is bent to match with an anatomical structure on the inner side or upper portion of a bowed edge, the auxiliary plate is a strip-like steel plate and is selected from at least one of a posterior column ilium sitting steel plate, a square zone baffle, a middle column pubis sitting steel plate, a front wall steel plate and a rami superior ossis pubis steel plate. The fixing steel plate can better meet the treatment demands of various acetabular fractures, can be used for a variety of acetabulum reattachment surgeries different in approaches and can be used for a variety of acetabular fracture surgeries adopting different anterior approaches.

The invention discloses a screw implantation sighting device and belongs to the field of orthopedics department medical instruments. The screw implantation sighting device comprises a sighting device front section and a sighting device back section, the back portion of the sighting device front section is movably connected with the front portion of the sighting device back section, the front portion and the bottom face of the sighting device front section are matched with the edge of the small pelvis, and a plurality of locating through holes are formed in the sighting device front section. When the front portion and the bottom face of the sighting device front section are adhered to the edge of the small pelvis, an extension line of the locating through holes is located in an acetabulum posterior column, an arc-shaped limiting plate is arranged on the back portion of the sighting device back section, the arc-shaped limiting plate is formed by bending of the back portion of the sighting device back section towards the bottom face of the sighting device back section, and the radian of an inner arc of the arc-shaped limiting plate is matched with the upper edge of the anterior superior spine. The screw implantation sighting device is simple in structure and low in cost and has the advantages of being accurate in locating and convenient to operate due to the adoption of multipoint locating and fixing.

The invention provides a universal atlas axis bone grafting block bridging plate for the cervical vertebra. The bridging plate has a transverse plane part and a longitudinal plane part, wherein the transverse plane part is connected to the longitudinal plane part in a T shape, the transverse plane part is inclined to the longitudinal plane part, the transverse plane part is an axis plate positioning block, the axis plate positioning block corresponds to an axis plate, and an axis plate positioning hole is formed in the axis plate positioning block; the longitudinal plane part is divided into abone grafting block fixing area close to the transverse plane part and an atlas positioning area far from the transverse plane part in the longitudinal direction, the bone grafting block fixing areais used for fixing a bone grafting block, and a bone grafting block fixing hole is formed in the bone grafting block fixing area; the atlas positioning area corresponds to an atlas, and an atlas positioning hole is formed in the atlas positioning area. The universal atlas axis bone grafting block bridging plate for the cervical vertebra has the advantages that the stability and the usability are both taken into account, and the biomimetic reconstruction of the posterior column of the cervical vertebra is achieved.

The invention relates to a posterior column screw guiding plate. The posterior column guiding plate is characterized by comprising a baseplate (1) and a guiding pipe (2) positioned on the baseplate (1); the guiding pipe (2) is communicated with the bottom of the baseplate (1) at the bottom of the guiding pipe and integrated with the baseplate (1); the baseplate (1) includes a transverse fossa iliaca fitting plate (1.1) and a vertical crista iliaca fitting plate (1.2), wherein the inner side of the crista iliaca fitting plate (1.2) is connected to the outer side of the fossa iliaca fitting plate (1.1), and the fossa iliaca fitting plate (1.1) is integrated with the crista iliaca fitting plate (1.2). The posterior column screw guiding plate has the advantages that the manufacturing price islow, and positioning is accurate; by adopting the posterior column screw guiding plate, the frequency of fluoroscopy during an operation can also be reduced, and therefore damage caused to the human body after fluoroscopy is carried out several times is avoided.

A personalized acetabular-bone posterior-column screw-setting drill die prepared through 3D printing comprises a body of a triangular frame structure, wherein the body comprises two main positioning pins, an auxiliary positioning pin, a main supporting wall and two auxiliary supporting walls. A preparation method comprises the following steps that 1, target acetabular-bone medical image data is obtained; 2, a central point set of a target acetabular-bone posterior-column zone is obtained; 3, the maximum inscribed cylinder of the target acetabular-bone posterior column is determined; 4, the outer diameter of a bone-connecting screw is initially selected, and the central axis of a corresponding screw-setting channel is determined; 5, the outer diameter of the bone-connecting screw is adjusted and controlled to solve the problem that a guiding drill die channel and an ilium ala possibly intervened with each other; 6, the outer diameter of the bone-connecting screw is further adjusted andcontrolled to meet the, designing, manufacturing and using demand of the screw-setting drill die; 7, a three-dimensional model of the screw-setting drill die is established; 8, the bone drill die is prepared through 3D printing. When the drill die is used for an acetabular-bone posterior-column screw internal-fixation technology, minimally invasive and efficient personalized acetabular-bone posterior-column screw-setting operation can be achieved, screw setting is accurate and safe, the operation is simple and stable, and the instrument cost is low.

The invention discloses a combined acetabular bone fracture fixation plate, and relates to the technical field of internal bone fracture fixation plates. The combined acetabular bone fracture fixationplate comprises a reconstruction boone fracture fixation plate, a supporting bone fracture fixation plate main plate, a supporting bone fracture fixation plate auxiliary plate and a reinforcement plate; the reconstruction bone fracture fixation plate is in a straight shape or an arc shape for adapting to the shape of the inner wall of the pelvis, is provided with a plurality of reconstruction bone fracture fixation plate screw holes at intervals and can be fixed to the anterior and posterior columns of the acetabular bone through first screws; the supporting bone fracture fixation plate mainplate comprises a main plate body part and main plate end parts, the main plate end parts are connected to the left and right ends of the main plate body part, the main plate body part is provided with a plurality of main plate screw holes at intervals, and each main plate end part is provided with an oval screw hole and can be fixedly connected with the reconstruction bone fracture fixation platethrough a second screw. According to the combined acetabular bone fracture fixation plate, the supporting bone fracture fixation plate main plate and the supporting bone fracture fixation plate auxiliary plate can be spread by supporting screws, so that the fracture is reset and fixed, the effect is good, and the screws are prevented from piercing the bone while the requirement for providing thefixation effect on some parts is met.