36 results about "Bone flaps" patented technology

A bone member fastener for closing a craniotomy includes a cap and a base interconnected by a narrow cylindrical collar. The cap has an externally threaded stud that screws into an internally threaded bore of the collar, thereby allowing the cap and base to be brought into clamping engagement against the internal and external faces of a bone plate and surrounding bone. In a particularly disclosed embodiment, the base of the fastener is placed below a craniotomy hole with the collar projecting into the hole, and the stud of the cap is screwed into the bore of the base from above the hole to clamp a bone flap against the surrounding cranium. This device provides a method of quickly and securely replacing a bone cover into a craniotomy. The distance between the cap and base can be selected by how far the threaded stud of the cap is advanced into the internally threaded collar. The fastener is therefore adaptable for use in several regions of the skull having various thicknesses. An insertion tool with a long handle permits safe and convenient placement of the base between the brain and the internal face of the bone plate. Some disclosed embodiments of the fastener have a cap and base that conform to the curved surface of the skull, for example by having an arcuate shape or flexible members that conform to the curvature of the bone plate and surrounding cranial bone as the fastener is tightened.

The disclosed cranial flap clamp includes first and second clamping members and an extension member. A portion of the first member is positionable against inferior surfaces of a bone flap and skull and a portion of the second member is positionable against superior surfaces of the flap and skull. The extension member extends from the first member through the second member and fits between the flap and skull. Movement of either of the clamping members urges the inner surface of the first member against the inferior surfaces of the flap and skull and urges the inner surface of the second member against the superior surfaces of the flap and skull. The securing instrument includes features useful in cutting or crimping the extension member. The tension limiting assembly provides variable designs and combinations for limiting the tension placed on, and exerted by, the securing instrument during use.

A cranial bone and bone flap fixation device, comprising first and second caps between which portions of the cranial bone and bone flap are to be gripped; a longitudinally extending mounting post located to allow relative cap movement lengthwise of an axis defined by the post at least the first cap having protruding structure to extend into a gap formed between the cranial bone and the bone flap to laterally orient the first cap so that peripheral portions thereof will extend over both the cranial bone and the bone flap during fixation.

The invention relates to a trephine having a limiting sleeve, wherein the trephine is used for a medical surgery purpose in skull defect and skull puncture surgeries. The trephine with the limiting sleeve comprises a motor, an internal trephine, and at least one trephine sleeve. The internal trephine is nested in the trephine sleeve by means of at least two bearings and is driven, by means of themotor, to rotate. The external trephine sleeve defines and adjusts the cutting depth of the internal trephine, while protecting a surgery operator and the tissue around a surgical site from being injured by a trephine rotating at a high speed; moreover, by drilling using the trephine having a limiting sleeve, a bone flap can be completely removed and retrieved from a trephined bone. The present invention realizes standardization and repetition of cranial defect and drilling surgery, and makes the surgery simple, easy to operate, safe and reliable, efficient, and is less traumatic. In a commonmedical researching laboratory condition, the trephine supplies a surgery technological insurance for a skull defect model and a clinical medical craniotomy and skull puncture of mice to large animals.

A method and means of cranial bone flap fixation that provides, among other things, the re-opening, resetting and/or repositioning of the bone flap during neurosurgical procedures. The instrumentation central to this method and means is MR and CT-visible to aid in imaging-based localization of it. The method and means can also be used in other types of medical procedures where certain kinds of hard or firm tissue fixation is desirable according to the method of the invention.

A surgeon utilizes a brain scan image to locate a brain lesion and to plan the operation to treat it. Distance measurements representing the location of the lesion are derived from various views of a brain scan image. In the operating room, he transfers these distance measurements onto the patient's cranium in a “warped” or curvilinear Cartesian coordinate system defined by intersecting orthogonal lines extending along the surface of the patient's cranium. As a result, the lesion is localized and the surgeon may establish the appropriate location and orientation of a bone flap to be used to access the lesion.

Disclosed is a manufacturing method of a skull guiding formwork for calvarium reconstruction surgery. The manufacturing method includes building a three-dimensional outline model of a skull of a patient; predicting a surgical objective model; determining a cutting path of craniotomy and the quantity and the shapes of bone flaps required to be cut and cutting and obtaining the bone flaps according to the cutting path; building a three-dimensional cutting guiding formwork model; designing splicing structures among the bone flaps and building a three-dimensional splicing guiding formwork model; and manufacturing a cutting guiding formwork and a splicing guiding formwork according to the cutting guiding formwork model and the splicing guiding formwork model. The skull guiding formwork for calvarium reconstruction surgery comprises the cutting guiding formwork and the splicing guiding formwork, and an outline of an edge of a cutting guiding formwork body shows the cutting path during surgery; and a mortise connecting structure which is spliced with the adjacent splicing guiding formwork or a skull base is arranged at the outer edge of a splicing guiding formwork body. The manufacturing method has the advantages that important anatomy position can be protected during surgery, excessive cutting to the bone flaps is avoided, and the manufacturing method is favorable for postoperation recovery and healing.

The invention provides an autologous skull collection, treatment and storage device and a profound hypothermia preservation method. The autologous skull collecting, processing and storing device comprises a profound hypothermia refrigerator body; two bridging plates both fixedly mounted on the outer wall of one side of the deep hypothermia refrigerator body; a double-section screw rod rotationally mounted on the sides, close to each other, of the two bridging plates; two fixed connection seats both fixedly installed on the outer wall of one side of the deep hypothermia refrigerator body, wherein the double-section screw rod penetrates through the fixed connection seats and is movably connected with the fixed connection seats; two bearing plates respectively hinged to the two fixed connection seats; and two placing grooves. The autologous skull collection, processing and storing device and the profound hypothermia preservation method have the advantages that the skull flaps and accessories are convenient to take, the air exposure time of objects is shortened, the temperature rise speed of the objects is slowed down, and use is convenient.

The invention discloses a skull flap activity preservation system for neurosurgery, and the system comprises a box body; the box body is divided into a sterilization chamber and a preservation chamberthrough a partition plate, the outer side of the top end of the box body is further provided with a liquid storage chamber, the upper portion of the sterilization chamber is further fixedly providedwith a spiral pipe through a support, and the input end of the spiral pipe is further connected with a cleaning straight-through pipe; a first electromagnetic valve is arranged at the input end of thecleaning straight-through pipe, a second electromagnetic valve is arranged at the output end of the cleaning straight-through pipe, the cleaning straight-through pipe is communicated with the liquidstorage chamber through a pipeline, a cathode ray tube used for sterilization is further fixedly installed at the top of the cleaning straight-through pipe, and a filter screen is further arranged atthe output end of the spiral pipe. According to the invention, integrated automatic operation of multiple steps and links is realized; the system saves time and labor, and greatly improves the intelligent degree and the automation degree of the system equipment; sterile operation is conducted in the whole process of the bone flap cleaning and storing stage, infection of external bacteria and viruses is avoided, the activity degree of the bone flap is guaranteed, and the high efficiency and practicability of the system for storing the bone flap are greatly improved.

The invention discloses a method of repairing skull defect models of New Zealand rabbits through autologous osteoblasts 3D bio-composite printed skull bone flap, and belongs to the technical field ofskull repairing. The method can make printed skull bone flap precisely individualized so as to achieve the requirements of skull mechanics; cells can be uniformly distributed in the three-dimensionalspace of a support, the normal nutrition and metabolism of the cells can be maintained, and cell viability can be guaranteed; the printed simulated skull flap can be immediately transplanted to repaira skull defect model of a New Zealand rabbit; histopathology, cellular immunology, imageology and other methods can be applied to detect the activity of osteoblasts, the structural changes of the support and the fusion situations of skull bone flap and bone margin; the purposes of the method are to explore a brand-new biomaterial for skull defect repair and establish a novel treatment mode for clinical skull defect repair; and important experimental bases and theoretical bases can be provided for future 3D biological multi-material and multi-cell organ printing.

The invention relates to the technical field of large bone flap decompression, and discloses a large bone flap decompression postoperative temporary brain protection device which comprises a first protection shell and a second protection shell, a top shell is arranged at the upper end of the first protection shell and the upper end of the second protection shell, and air bag layers are arranged on the inner side faces of the first protection shell, the second protection shell and the top shell. A first magnetic sheet is embedded in the upper surface of the first protective shell, a fixing box is arranged on the front surface of the first protective shell and located below the front groove, and a loudspeaker is embedded in the front surface of the first protective shell and located on one side of the fixing box. The wearing comfort of patients with different head sizes is met through the gas injection amount of the air bag layer, meanwhile, oxygen and food supply of the patients can be met through the design of the fixing box and the oxygen uptake cover, doctors or family members can conveniently understand the requirements of the patients in time through cooperation of the microphone and the loudspeaker, help is provided for the patients, operation is easy and convenient, and practicability is high. The functionality is high.

The invention relates to the technical field of medical apparatus and instruments, and discloses a skull repairing support frame. The 'H'-shaped skull repairing support frame comprises a bottom plate, a movable upper plate and a fixed upper plate. The middles of two side edges of the bottom plate are fixedly connected with the bottoms of support rods, the movable upper plate is movably connected with the tops of the support rods, the fixed upper plate is fixedly connected with the tops of the support rods, and at least two connecting holes are respectively formed in the movable upper plate and the fixed upper plate. The ends of the fixed upper plate are clamped on the normal skull at the peripheral edge of a bone window when the skull repairing support frame is used, so that the bottom plate can cling to the bottom surface of the skull of a patient, the movable upper plate can be upwardly lifted after the fixed upper plate is firmly fixed by the aid of screws, repaired free bone flaps can be arranged on the bottom plate according to corresponding shapes, then the movable upper plate can be reset and can be firmly fixed by the aid of screws. The skull repairing support frame has the advantages that the skull repairing support frame is simple in structure and reliable in performance, can be used conveniently and quickly and can be reused, trauma of the patient can be reduced, and the treatment cost can be lowered for the patient.

The invention discloses a mandibular osteotomy guide plate capable of retaining apodeum. The mandibular osteotomy guide plate is characterized by comprising two osteotomy guide plates and a connecting rod for connecting the two osteotomy guide plates, wherein the two osteotomy guide plates are provided with osteotomy guide wire grooves; and both the osteotomy guide plates are provided with fixing holes. A patient is subjected to maxillofacial CT before an operation, and CT data are imported into digital surgical auxiliary software in a DICOM format; the mandible is separated in the software, and simulation design of the osteotomy guide plate and bone flap repair are carried out; and after 3D printing is carried out on a repaired model, titanium plate bending and nail hole presetting are carried out on the basis, and CT is carried out on the model again. After osteotomy repair simulation, the mandible model, a titanium plate and nail hole model are subjected to fitting to complete nail road transfer; related data is imported into three-dimensional design software in a stl file format; design of the osteotomy guide plate is carried out; and after design is completed, 3D printing is carried out. The mandibular osteotomy guide plate is simple to operate and easy to popularize.

The present invention relates to a jaw bone transplantation in-place guide plate. The jaw bone transplantation in-place guide plate comprises a guide plate body, the guide plate body comprises a mainplate and a plurality of positioning parts located on an inner side of the main plate, wherein, a plurality of the positioning parts are fixed to a mandible stump bone and a transplantation bone respectively, the main plate between every two adjacent positioning parts forms an arch structure, and gaps for accommodating soft tissues are formed between the arch structures and the mandible stump boneor the transplantation bone. The jaw bone transplantation in-place guide plate ensures in-place guiding of the transplantation bone, also fully reserves muscles and other soft tissues carried by boneflaps, ensures functional recovery of a reconstruction operation and fullness of a face, and avoids a situation that the functional recovery is affected after the muscles and other soft tissues brought by the bone flaps are fully peeled off.

The invention relates to a method for cultivating a vascularized bone flap. The method comprises the following steps: performing in-vivo blood perfusion of a vascularized envelope flap with an axial blood vessel by an immunodeficient animal or an artificial perfusion system to obtain a vascularized bone flap cultivator; performing primary culture of bone marrow mesenchymal stem cells or osteoblasts, and inoculating to a porous bone matrix material; and wrapping the inside of the vascularized bone flap cultivator to cultivate a vascularized bone flap. By applying the vascularized bone flap obtained by the method provided by the invention to bone defect repairing, the body injury can be minimized.

The embodiment of the invention provides an intraosseous fixing screw made of semi-threaded magnesium alloy and magnesium alloy. The screw comprises a nail body and a nail cap integrally formed with the nail body, wherein the nail body is provided with threads, and the ratio of the length of the threads to the length of the nail body is (0.3-0.5): 1; a hole is formed in the nail cap; the nail capis a pressurized nail cap; and the included angle between the conical surface of the pressurized nail cap and the center line of the nail body is 20-40 degrees. The intraosseous fixing screw made of semi-threaded magnesium alloy can exert pressure on bone tissues again after the screw is completely implanted, and thus the fixation effect of the screw on bone blocks and bone flaps can be strengthened; as the screw has higher fixation strength, when the screw is implanted into hard bone such as cortical bone, deformation and fracture of threads can be avoided, and sliding and twisting breaks ofthe nail cap can be avoided; and the intraosseous fixing screw made of semi-threaded magnesium alloy has a semi-threaded structure, has a better holding effect on a fixed position with larger tension,and can improve the fixation strength of the screw.