60 results about "Cranial bone" 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.

To provide an implant for securing neighbouring bone plates, especially neighbouring cranial bone plates, wherein the bone plates each have an inner face and an outer face, comprising an inner contact element that is adapted to rest on the inner faces of the neighbouring bone plates, an outer contact element that is adapted to rest on the outer faces of the neighbouring bone plates, and an in a linear manner flexible tensioning element for connecting the inner contact element and the outer contact element in such a manner that they can no longer be separated from one another, with improved properties, it is provided that the outer contact element comprises at least one recess for at least partially accommodating a connection region between free strands of the tensioning element or for feeding the connection region through into a separation gap between the neighbouring bone plates.

A fixation device is disclosed for the fixation of proximal humerus fractures includes an implantable humerus plate having a proximal portion adapted to be positioned at a head and medial calcar of the humerus, a distal portion adapted to be positioned along a shaft of the humerus, and a plurality of calcar openings provided through the proximal portion adapted to receive calcar fasteners that extend into the medial calcar. The calcar fasteners are grouped into a rafted configuration and the tips of each fastener are positioned into the calcar region so that torsional forces bearing upon the calcar regions are distributed into the rafted fastener support, thereby avoiding varus collapse of the humerus head after fixation of the fracture.

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.

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 mounting post located to allow relative cap movement lengthwise of an axis defined by the post, at least the first cap, which is movable lengthwise of the post, forming peripheral petals that are spaced apart about an axis and radially outwardly of a central body portion of the cap, whereby the petals are individually and resiliently movable relative to the central body portion in directions generally parallel to the axis, and in response to gripping.

The invention is a manufacturing method for titanium alloy cranial bone dummy, applies to cranial nerves surgery cranial bone renovation field. The invention assembles the dummy based on the CT picture of patient; the character lies in: the computer with universal image processing software and back designing software reconstructs the three-dimension prototype of patient head after dividing the fracture image, designs the dummy of defect part according to the three-dimension prototype, and the designed dummy curved surface is guided into multi-point forming system and quick-prototype system to press titanium network board and produce dummy slice model, finally forms the terminal dummy through comparing and cutting the titanium network board; the invention uses multi-point forming technology to compress the dummy quickly, it can uses the softness character of mouldless multi-point to compress the dummy in order to solves the back springing problem. The cost is low, the speed is high.

The invention relates to a double-layer titanium mesh for cranioplasty, which is characterized by comprising an inner-layer titanium mesh and an outer-layer titanium mesh, wherein the outer-layer titanium mesh coincides with the defective edge on the outer surface of the cranial bone; the curvature of the outer-layer titanium mesh conforms to the appearance of the head; the gap between the inner-layer titanium mesh and the outer-layer titanium mesh is filled with autologous bone granules or artificial bone granules; the outer-layer titanium mesh comprises a scalp contact surface and fixed-end grooves; the curvature of the outer-layer titanium mesh conforms to the outer surface of the skull; the edge of the outer-layer titanium mesh coincides with the defective edge on the outer surface of the cranial bone; the outer-layer titanium mesh is fixed on the defective position on the outer surface by screws, so that the outer surface of the cranial bone can be closed; and the outer-layer titanium mesh is provided with holes. The titanium mesh can simultaneously repair the inner surface and the outer surface of the cranial bone, thereby realizing full anatomical and functional recovery and avoiding the brain tissue damage caused by inner surface defects.

The invention provides means by which access to the intracranial compartment is completely sealed from the skin and the scalp tissues, which makes it possible to change the drain when necessary without bringing the drain in the contact with the scalp. It also provides an improved ventricle draining system supporting a better fixation of the drain to avoid the drain from sliding. The drain comprises a fixture with a conduit defining passage through the fixture, the fixture being provided with fastening means for attachment of the fixture to an aperture in the cranial bone, a seal for sealed engagement with a catheter inserted in the fixture, and fastener for securing the catheter to the fixture.

An implant is provided for fixing neighbouring bone plates of the cranial bone in a simple and reliable manner. The implant comprises an outer bearing element for covering a spacing gap between the bone plates, which sits on outer surfaces of the bone plates. The outer bearing element has a first pair of outer openings and a first pair of inner openings. An inner bearing element is provided for covering the spacing gap between the bone plates, which sits on inner surfaces of the bone plates. The inner bearing element has a second pair of outer openings and a second pair of inner openings. A thread-like tensioning element is provided which is threaded through the openings of the outer and inner bearing elements in a displaceable manner, such that, when tensioned, the tensioning element draws the inner bearing element and the outer bearing element together.

The invention relates to a navigation system for dental and cranio-maxillofacial surgery, comprising a surgical handpiece (2), an imaging unit (4) which is movably attached to the surgical handpiece (2), and a marker member (6; 44, 46) which is attachable to a cranial bone, a facial bone (26), a tooth or teeth of a patient. The marker member (6; 44, 46) comprises a plurality of marker elements (8, 10; 46) which are detectable by the imaging unit (4). Further, the invention relates to a positioning tool (40) for use with the navigation system, wherein the positioning tool (40) is configured for positioning the marker member (44, 46) on a patient's cranial bone, facial bone (26), tooth or teeth and comprises a die element (42) and the marker member (44, 46). The marker member (44, 46) comprises a deformable material (44), the deformable material (44) is releasably received in the die element (42) and the plurality of marker elements (46) are arranged on a surface of the deformable material (44) which faces the die element (42), The invention further relates to a navigation method for dental and craniomaxillofacial surgery using the navigation system and to a method of positioning a marker member (44, 46) on a patient's cranial bone, facial bone (26), tooth or teeth using the positioning tool (40).

The provide manufacturing technology and method for a bone conductive speaker that enables a person to be aware and recognize audio signal, with the cranial bones of a human body, through the vibrations of a vibrator. In a bone conductive speaker, a magnet is not installed proximately to a voice coil in a configuration box, but one magnet is installed in an upper portion of an iron piece. Thus, the trouble of matching magnet directionality is eliminated, not only characteristics adjustment can be made wider by enlarging the size of the voice coil, but also strength adjustment that depends on the changes in the size of the magnet can be significantly facilitated, and the bone conductive speaker can be made small-sized and lightweight.

An apparatus for delivering audio signals to a user includes an air-conduction transducer and a bone-conduction transducer. The air-conduction transducer is configured to convert a component of the audio signals to air vibrations detectable by an ear of the user. The bone-conduction transducer is configured to convert another component of the audio signals to vibrations in a cranial bone of the user via direct contact with the user. The apparatus employs one or more filters to separate input audio signals to produce a high-frequency component, a mid-frequency component, and a low-frequency component. The mid- and low-frequency components are processed using compressors to reduce the dynamic range of the components, and then combined to produce a combined component. The combined component is delivered to the user through the bone-conduction transducer, and the high-frequency component is delivered to the user through the air-conduction transducer.

The present invention provides a bone conduction intelligent wearable watch, comprising a master control CPU, a data processing module, a bone conduction processor, a display module, a signal source module, a power supply module, a sample acquisition module, an information feedback module, a gravity sensing module and a control module; wherein the master control CPU is connected with the data processing module, the display module, the signal source module, the power supply module, the sample acquisition module, the information feedback module, the gravity sensing module and the control module, the data processing module is also connected with the information feedback module, the sample acquisition module and the bone conduction processor, and the bone conduction processor is connected with an auditory nerve by using a bone as a conducting medium. The bone conduction intelligent wearable watch of the present invention can conveniently transmit the sound to the auditory nerve in an ear directly through cranial bones by means of a bone conduction technology.

An implantable cortical electrical stimulation device having wireless power control function comprises: an electrical stimulation device (100) which is arranged through a perforation part of cranial bone (1) and upper part of which is covered with scalp and thus electrical stimulation is transferred outside dura meter (2) to cerebral cortex (3); a head set (200) which is provided controllably with antenna (210) connecting wirelessly with the electrical stimulation device (100) outside scalp and applying power, and is fixed to a head; and a control element (300) which controls the electrical simulation device (310) through a power wire (211) connected to the antenna (210) of the head set (200). According to the present invention, cranial bone is perforated and electrodes of the electrical stimulation device allows reference electrode and stimulation electrode to be contacted with cerebral cortex, and the electrical stimulation device is fixed to cranial bone with titanium screw and then implantation thereof is finished. Here, in order to supply power to the electrical stimulation device an antenna for supplying power is approached closely to scalp and the antenna is placed to be an exact center of the electrical stimulation device so that power supply and data can be transferred without error.

A surrogate multilayered material includes a first fiber reinforced layer; the first reinforced layer including a crosslinked polymer and fibers; a second fiber reinforced layer; the second reinforced layer including the crosslinked polymer and the fibers; a foam layer; the foam layer disposed between the first fiber reinforced layer and the second fiber reinforced layer; where opposite faces of the foam layer are in direct contact with the first fiber reinforced layer and the second fiber reinforced layer; the foam layer having a compressive strength of about 3.5 to about 4.5 MPa, when measured as per ASTM-D-1621-73, and a shear strength of 1.50 to about 2.15 MPa, when measured as per ASTM-C-273.

The invention provides an otolith vibration therapy instrument, and discloses a tool for treating cupulolithiasis of benign positional paroxysmal vertigo. The benign positional paroxysmal vertigo includes canalithiasis and the cupulolithiasis. Multiple existing methods can effectively treat the canalithiasis, but the method for effectively treating the cupulolithiasis does not exist. The otolith vibration therapy instrument is designed according to the existing study theory and clinical practice experience of the cupulolithiasis. The otolith vibration therapy instrument has the advantages that according to the characteristics of dissecting of cranial bones of human body, a mastoid process is used as a part which is in contact with the human body in the therapy process; during therapy, the vibration therapy frequency is continuously switched between low frequency and high frequency through electrodeless adjusting, so the otolith adhered to the cupula of ampullary crest is promoted to fall down.

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.

The invention discloses a prior knowledge-based method for reconstructing the artificial bone repair model of a damaged part. According to the method, firstly, a skeleton outer contour is extracted from a medical tomographic CT image, and a repairing template is introduced. Meanwhile, a contour line is re-sampled from the repairing template according to the thickness of a broken layer. Secondly, atemplate layer which is the most matched with a to-be-repaired layer is searched out of the repairing template by utilizing a characteristic value method, and the template layer and the to-be-repaired layer are aligned and transformed. Thirdly, the isomorphic points of the breakpoint of the to-be-repaired layer are obtained on the template layer through a common included angle method, and a fitting equation between isomorphic points is calculated. The values are reversely substituted into a fitting equation and then the coordinate of the interpolation point of the to-be-repaired layer can beobtained. Fourthly, an inner contour is generated according to the given thicknesses of the inner and outer layers of the bone. Finally, an artificial bone repair model is obtained by utilizing the VTK three-dimensional reconstruction. The method disclosed by the invention is applied to the actual implantation operative procedure of personalized artificial bones when cranial bones are broken too seriously to be directly repaired by the surgical operation after human frontal bones, parietal bones and other parts are heavily damaged.

The invention relates to a hand craniotomy drill with a depth limiting device. The hand craniotomy drill comprises a drill bit (1), a thread (2), a drill body (3), a drill body connecting portion (4) and a nut (5). The hand craniotomy drill has the advantages that the operation is simple, the usage is convenient, besides, drilling depth for a cranial bone can be adjusted according to the thickness of the cranial bone of a patient, the use cost is low, and the safety for usage is remarkably improved.

A ventricle drain includes a sealing structure for providing a sealed passage through an aperture in a cranial bone. The ventricle drain also includes a catheter having a free end and an end adapted for insertion into the aperture through the sealed passage for draining bodily fluids. The sealing structure includes a fixture with a conduit defining a passage through the fixture, a seal for sealed engagement with the catheter and the fixture, and a fastener for securing the catheter to the fixture. The fixture is provided with a fastening structure for attachment of the fixture to the aperture.

The invention discloses an in-situ inoculating operation method for a cerebral tumor tissue block animal. The method comprises the following steps: (a) taking a cerebral tumor tissue, and shearing the cerebral tumor tissue into tumor tissue particles; (b) placing the tumor tissue particles into a needle tube of a tissue block injection needle, and carrying out quantifiable indwelling control on the tumor tissue particles; (c) anaesthetizing the animal, dissecting the skin on the surface of the animal skull, and boring a hole on the animal cranial bone; (d) inserting the tissue block injection needle along a cranial bone hole, and slowly injecting the tumor tissue particles; and (e) slowly pulling out the needle, sealing the cranial bone hole by bone wax, and suturing the scalp. The method can ensure the original tissue structural property of an inoculated tumor tissue, provides a tumor model with high simulation degree for tumor research, can ensure the vitality of inoculated cells, has high tumor transplantation success rate, can realize quantification of cell number in the inoculated tumor tissue and positioning of inoculation in the tumor tissue animal brain, has short operation time, and can meet the requirement of needing large amount of animal models in once experiment.