52 results about "Skull repair" patented technology

The invention relates to a bone cement injection device for skull repair. The bone cement injection device comprises an outer sheath tube, a separate injection structure and an outer push rod, a pushing channel extending in the axial direction is formed in the outer sheath tube, the tube wall of the outer sheath tube is provided with a first hole group and a second hole group which are symmetrically distributed by 180 degrees in the circumferential direction, and each hole group comprises a plurality of via holes arranged at equal intervals in the axial direction; the two symmetrically-arranged separated injection structures are arranged corresponding to the first hole set and the second hole set respectively, each separated injection structure comprises a separated injection pipe, the separated injection pipe is inserted into the pushing channel, a perfusion channel extending in the axial direction is arranged in the separated injection pipe, the near end of the perfusion channel is through, and the far end of the perfusion channel is closed; the rigid contact pins are arranged at equal intervals in the axial direction of the separate injection pipe and penetrate through the side wall of the separate injection pipe at the same circumferential angle, and the inner end of each contact pin is communicated with the perfusion channel. The repairing block can be effectively filled with bone cement, and the effect after skull repairing is improved.

The utility model relates to the technical field of skull repairing, in particular to a splicable skull repairing system which comprises a first skull repairing piece, a second skull repairing piece and a plurality of connecting assemblies used for connecting the first skull repairing piece and the second skull repairing piece to the skull of the human body, and the first skull repairing piece and the second skull repairing piece are arranged in an up-down spaced mode. The first skull repairing piece comprises a plurality of first splicing strips which are arranged side by side in an abutting mode, the second skull repairing piece comprises a plurality of second splicing strips which are arranged side by side in an abutting mode, and the arrangement direction of the second splicing strips and the arrangement direction of the first splicing strips are staggered; a plurality of convex tongues are arranged on the second skull repairing sheet in an array mode, and a plurality of clamping grooves are formed in the first skull repairing sheet in an array mode; and the second skull repairing sheet is connected with the first skull repairing sheet through the clamping matching of the convex tongue and the clamping groove. The skull repair block has the advantages that the risk that the skull repair block collapses when bearing impact is reduced, the strength of the spliced skull repair block is improved, a patient is protected, the operation time is shortened, and the cost and the postoperative infection rate are reduced.

The invention provides light-cured bio-ink, a digital light processing 3D printing product, a preparation method of the digital light processing 3D printing product and application of the digital light processing 3D printing product in preparation of a skull repair material, and belongs to the technical field of biological medicine. The material provided by the invention can continuously release HO under different environmental conditions. Particularly, in a simulated in-vivo environment, the GHDP hydrogel keeps stable HO release for a long time, so that a signal channel related to angiogenesis is continuously activated, and in the skull defect repair process, the GHDP hydrogel can promote neovascularization and osteogenic differentiation by regulating and controlling the HO level, so that the skull defect repair effect is improved. And a new strategy and thought are provided for promoting tissue regeneration by utilizing redox signal regulation and control.

The utility model relates to a skull repair surgery bone plate which comprises a plate body, at least two seepage holes and at least two line hanging holes, the seepage holes are evenly distributed in the plate body, the line hanging holes are distributed in the plate body at intervals according to a preset distribution arc line, the seepage holes and the line hanging holes both penetrate through the plate body, and the plate body is used for covering and fixing a defect area of a skull. When the plate body covers the defect area of the skull, the line hanging holes are correspondingly distributed in the direction of the upper temporal line of the patient. When the bone plate for the skull repair surgery is used, the embedding angle of the plate body can be correspondingly adjusted according to the corresponding relation between the preset distribution arc line and the supratemporal line of a patient, so that the line hanging holes can be approximately arranged in the direction of the supratemporal line of the patient; according to the utility model, the suture line can pass through the suture line hanging hole and can draw and fix the temporalis in the growth direction of the temporalis, so that the traction effect of the temporalis before dissection and dissociation can be furthest restored, enough tension is provided for the temporalis, the normal function of the temporalis is maintained, and temporalis atrophy is prevented.

The present invention discloses a composite skull repair hydrogel material with a patterned adhesion-promoting surface and a preparation method thereof. The preparation method comprises the following: 1) using a precipitation method to prepare mesoporous manganese dioxide (MMD), then combining a cyclic ultrasonic loading method to load osteogenic drugs in the pores of the MMD, and using an in-situ free radical polymerization method to coat a sustained-release polydopamine (PDA) coating on its surface to obtain MMD-O-PDA; 2) MMD-O-PDA is evenly mixed with an amino-containing UV-curable polymer solution, placed on a custom PDMS mold with a special patterned surface, covered with a transparent quartz sheet, and UV-cured and demolded; 3) in situ grafting of adhesion proteins on the surface of the composite hydrogel material with a cross-linking agent, and the hydrogel material is obtained after ultra-frequency dialysis. The material has a highly efficient cell adhesion-promoting effect, can quickly enrich osteoblasts in the defect site, and simultaneously has anti-inflammatory and full-cycle osteogenic effects, thereby efficiently promoting the repair of skull defect sites.

The invention relates to the technical field of computer-aided skull repair prosthesis design and manufacturing, in particular to a computer-aided skull repair prosthesis design and manufacturing system. Comprising a form prediction unit used for solving an optimal form coefficient and generating an initial prosthesis form; the constraint evaluation unit is used for calculating to obtain a prosthesis conflict index and dividing conflict grades; the correction field generation unit is used for deconstructing a physical violation amount in response to the prosthesis conflict index, and solving and generating a dense displacement field covering all vertexes of the prosthesis through a form correction propagation model; and the closed-loop optimization unit is used for performing geometric deformation on the initial prosthesis form by applying the dense displacement field to obtain a corrected prosthesis form, and re-submitting the corrected prosthesis form to the constraint evaluation unit to execute a grading final edition strategy. According to the method, the contradiction between anatomical fidelity and clinical safety constraint in skull repair is solved by constructing a system comprising morphological prediction, constraint evaluation, correction generation and closed-loop optimization.

The invention provides modified PMMA bone cement powder and a preparation method thereof, modified PMMA bone cement and a preparation method and application thereof, and relates to the technical field of biomedical materials. The modified PMMA bone cement powder comprises 5-20 wt% of a modified magnesium-containing material, 3-7 wt% of an initiator and the balance of PMMA powder; the modified magnesium-containing material comprises a magnesium-containing material (magnesium or magnesium-zinc alloy powder) and an MgF2 layer coated on the surface of the magnesium-containing material. Bone cement added with the modified PMMA bone cement powder is used as a skull defect repair material, after implantation and solidification, through slow release of magnesium ions (which can contain zinc ions) in modified magnesium or magnesium-zinc alloy powder, on the basis of ensuring safety and effective skull repair, through multi-channel anti-inflammation (Mg < 2 + > (which can comprise Zn < 2 + >), hydroxyl and hydrogen synergistic anti-inflammation), the anti-inflammation effect is remarkable, and the anti-inflammation effect is good. And long-term stability of the structure can be guaranteed, and remarkable mechanical attenuation or structural failure is avoided.

The invention relates to a prosthesis used for being implanted into a defect area of a bone, and particularly discloses a skull repairing component which comprises a bone flap body used for being filled in the defect area of the skull, and the bone flap body comprises a disc-shaped filling body and a plurality of stimulation units. The plurality of stimulation units are circumferentially arranged between the outer disc surface and the inner disc surface of the filling main body, and each stimulation unit can protrude out of the side wall of the filling main body through radial movement; and the force application part is used for driving the stimulation units to radially protrude out of the side wall of the filling main body, so that after the bone flap body is filled in the defect area, the stimulation units are driven to stimulate the bone flap body. The force applying component drives the stimulation units to protrude out of the side wall of the filling body, so that the radial outer ends of the stimulation units are pressed against the side wall of the defect area to stimulate the bone body of the side wall of the defect area; and the positioning component is used for combining and positioning the bone flap body and the skull.

The present invention relates to a polyetheretherketone (PEEK) composite material, a preparation method thereof, and its application in 3D-printed artificial skull prostheses, and relates to the technical field of PEEK materials. The PEEK composite material comprises the following raw materials, measured by weight: 50-60 parts of PEEK, 40-50 parts of modified hydroxyapatite, and 4-9 parts of chitosan. Based on the existing PEEK / hydroxyapatite system, the present invention effectively addresses the problem of decreased tensile strength caused by excessive addition of hydroxyapatite by modifying hydroxyapatite with a carboxyl-containing cage-type polysilsesquioxane and introducing chitosan with an appropriate degree of deacetylation. This improves the material's flexibility, resulting in a PEEK composite material with a high hydroxyapatite content, excellent tensile strength, and good flexibility, which can fully meet the application requirements of bone implants such as artificial skull prostheses.

The invention belongs to the technical field of medicine, discloses a skull rapid growth marker and application thereof, and provides a skull rapid growth marker based on a pressure / dura mater FAK-Twist1 pathway and an application method of the marker in child skull defect repair. By detecting the expression level of the marker, the growth and development state of the pediatric skull can be accurately judged, and a scientific basis is provided for clinical doctors to select proper skull repair opportunities, so that the success rate and safety of pediatric skull defect repair operations are improved, and postoperative complications are reduced. The rapid skull growth markers determined by the invention are closely related to the growth and development mechanism of the child skull based on a pressure / dura mater FAK-Twist1 pathway, and the growth state of the skull can be accurately reflected by detecting the expression level of the markers, so that a reliable diagnostic basis is provided for opportunity selection of a child skull defect repair operation.

This invention relates to the field of cranioplasty materials, and particularly to a pediatric cranioplasty material, its preparation method, and its application. A method for preparing a pediatric cranioplasty material includes: acquiring cranial model data of a pediatric patient; obtaining a dense layer using 3D printing based on the cranial model data; placing a titanium mesh on the dense layer; wherein the titanium mesh comprises multiple titanium strips, each titanium strip having its two ends movably connected to the endpoints of two other titanium strips to form a titanium mesh, and each titanium strip rotating in the same plane about the movably connected point as an axis to extend or contract the titanium mesh; obtaining a porous layer using 3D printing on the dense layer and the titanium mesh based on the cranial model data, the dense layer and the porous layer encapsulating the titanium mesh to obtain the pediatric cranioplasty material. This invention provides a pediatric cranioplasty material, its preparation method, and its application, providing a cranioplasty material with strong mechanical properties and deformation capacity.

The invention discloses a functional structure improvement preparation method based on a PEEK skull repair material, and belongs to the technical field of skull repair materials. The PEEK skull repairing material comprises a PEEK skull repairing main body, a plurality of mounting holes, a plurality of first through holes and a plurality of second through holes, wherein the mounting holes are formed in the edge of the PEEK skull repairing main body at intervals; the first through holes and the second through holes are formed in the PEEK skull repairing main body at intervals; the first through hole is of an hourglass-shaped hole channel structure. The second through hole is of a needle nose structure; the PEEK skull repairing material is prepared by the following steps: performing 3D printing on a composite material which is obtained by compounding a carbon nano tube, hydroxyapatite, PEEK and a pore-forming agent and is used as a raw material, standing and extracting in acetone, and sequentially adding an N, N-dimethylformamide solution of poly (L-glutamic acid-L-cysteine), L-threonine-N-carbonyl anhydride and an N, N-dimethylformamide solution of a magnesium gallate metal organic framework, an N, N-dimethylformamide solution of a magnesium gallate metal organic framework into the 3D printing material for 3D printing to obtain the PEEK skull repairing material. And dipping in an N, N-dimethylformamide mixed solution to obtain the product.

The utility model relates to the technical field of artificial bone structures, in particular to an improved PEEK (polyetheretherketone) screen plate which comprises a plate body corresponding to a skull repair position in shape, a plurality of fixing grooves formed in the outer edge of the upper end of the plate body in a staggered manner and a plurality of through holes formed in the middle of the plate body in a rectangular array manner. The outer side of the plate body is provided with a suture fixing structure used for assisting in suturing and fixing muscular tissue to the outside of the plate body through a suture line. According to the utility model, the original PEEK skull mesh plate structure is scientifically and reasonably improved, and the mesh plate is provided with two forms of line fixing structures which are used for assisting in suturing and fixing muscular tissues outside the plate body through sutures, so that the temporomuscle muscular tissues can be conveniently sutured and fixed outside the mesh plate along a track; the fixing device is simple in structure and convenient to use, temporal muscles can be attached to the net plate easily, muscle contracture is avoided, the workload and difficulty of actual operation of medical staff are effectively reduced, and therefore the convenience and efficiency of actual fixing operation of the PEEK net plate are improved.

The application discloses a porous structure skull prosthesis manufacturing method based on 3D printing and injection molding technology, relates to the technical field of skull defect repair prosthesis in neurosurgery, and comprises the following steps: performing three-dimensional reconstruction according to skull imaging data to obtain a skull three-dimensional model; manufacturing a male mold (also referred to as a convex mold) mold, a female mold (also referred to as a concave mold) mold and a porous sand structure according to the skull three-dimensional model; assembling the male mold mold, the female mold mold and the porous sand structure to be injection molded into a skull prosthesis model; and cooling, solidifying and sand cleaning the skull prosthesis model to obtain a skull repair prosthesis. The application is processed by means of CNC numerical control machining technology, injection molding technology and 3D printing technology, high-temperature injection molding is performed on a medical polymer material, and the skull repair prosthesis is obtained by removing the sand structure. The skull repair prosthesis can realize the ingrowth of scalp soft tissue, speeds up the skull repair and reconstruction process, and reduces the incidence of adverse reactions such as postoperative hydrops.

According to the preparation method of the PEEK-based tantalum coating skull restoration, the tantalum coating is prepared through data modeling, fused deposition modeling 3D printing and magnetron sputtering, the preparation process is simplified, and the production efficiency and the product consistency are improved. Medical-grade PEEK serves as a substrate, a micro-nano structure is formed on the surface through laser pretreatment, an ultrathin tantalum coating (the thickness is smaller than or equal to 1 micrometer) is deposited through magnetron sputtering, the matching degree of the appearance of the prosthesis and the anatomical appearance of a skull defect area reaches + / -1 mm, and the proximity error between the elasticity modulus of a bone contact area and a host bone is smaller than or equal to + / -10%.

The utility model relates to the technical field of medical instruments, in particular to a skull repair plate, which comprises an implantation main body provided with an inner surface and an outer surface which are opposite to each other; the through hole penetrates through the implantation main body; the temporomuscle suspension system is distributed on the implantation main body and comprises at least one group of temporomuscle suspension structures which are independent from the through hole and are not communicated with the through hole; the temporalis suspension structure comprises a first opening, a second opening and a channel, the first opening and the second opening are both located in the outer surface, the channel obliquely extends downwards from the first opening and then obliquely extends upwards to the second opening, the bottom wall of the channel is a plane, and a gap is formed between the bottom wall of the channel and the inner surface. According to the skull repair plate, the temporal muscle suspension system is arranged, the mechanical strength of the repair plate is considered, meanwhile, the skull repair plate can be suitable for suture curved needles with different arcs and radians, the suspension threading difficulty is reduced, the operation time is shortened, and the operation satisfaction degree of a patient is improved.

The utility model relates to medical instrument technical field, specifically disclose a skull repair device of integrated cerebrospinal fluid shunt, including artificial bone plate, be used for repairing skull defect, the outer surface of artificial bone plate is equipped with positioning recess, the positioning recess is used for accommodating cerebrospinal fluid shunt, and the positioning recess is equipped with the fixing assembly for fixing shunt. The utility model embeds the main part of cerebrospinal fluid shunt into artificial bone plate, makes shunt main part can accommodate in the thickness range of repair device itself, thereby significantly reduced the overall profile height of implant, effectively reduced the pressure and tension generated to scalp, can prevent the scalp erosion, breakage, necrosis and other serious complications caused by implant profile too high, simultaneously, through the fixing assembly to the shunt fixation, can effectively prevent the shunt from turning over or displacement after operation, guarantee the long-term stability and safety of drainage system, and simplify the operation.

The invention discloses a skull connecting and fixing system for fixing a skull repair patch, and relates to the technical field of medical instruments. The system comprises an upper locking piece, a lower locking piece and an expansion screw, and the fixing stability of the skull repairing piece is improved through a double fixing mechanism. The upper locking piece and the lower locking piece are in threaded connection to achieve primary longitudinal fixation, and the skull and the repairing piece are preliminarily locked; the expansion screw is inserted through a middle hole of the upper locking piece and expands, secondary transverse fixing is achieved, and the anti-loosening capacity is enhanced. The lower locking piece is provided with a retaining ring for a medical wire to penetrate through so as to lift and position the lower locking piece in the installation process. The upper locking piece and / or the lower locking piece are / is provided with elastic parts, each elastic part comprises a deformable groove position, and the elastic parts are opened under the action of the expansion screws to press the skull and the repairing piece. The expansion screw comprises an expansion structure and a screw, and when tightened, the expansion screw is opened to transmit force to the locking piece. The whole system is made of biocompatible materials, is suitable for craniocerebral surgery, and effectively solves the technical problem that a traditional skull fixing device is insufficient in stability.

The artificial skull structure comprises an artificial skull main body and a supporting foot, the supporting foot is connected to the periphery of the artificial skull main body and extends outwards, and the artificial skull main body is provided with an inner surface and an outer surface opposite to the inner surface. The projected area of the outer surface of the artificial skull body on a plane parallel to the skull surface is larger than the projected area of the inner surface of the artificial skull body. The supporting feet are arranged on the periphery of the artificial skull main body, so that a stable supporting point is provided for the artificial skull main body; the projected area of the outer surface of the artificial skull main body is larger than that of the inner surface of the artificial skull main body, so that the overall displacement resistance, collapse resistance and external impact resistance of the artificial skull main body are enhanced, and the safety of intracranial tissues is effectively protected.

This invention discloses a composite cranial repair bioprobe based on a 3D frame structure, comprising a 3D frame and biological patch units. The 3D frame includes an edge retention device and an internal main frame, each with a support platform. Each support platform houses the biological patch unit, which comprises a porous layer, a biomimetic layer, and a reinforcing layer arranged sequentially from the outside in. The porous layer has a porous structure with pores, the biomimetic layer is a biomimetic structure mimicking the trabeculae of the skull, and the reinforcing layer is a solid structure. The 3D frame portion of the composite cranial repair bioprobe provided by this invention sufficiently ensures the mechanical strength of the repair. The design of individual biological patch units, while meeting certain mechanical strength requirements, also ensures the integration of soft tissue and the ingrowth of host bone, guaranteeing the long-term stability of the repair.

The present application relates to the technical field of computer-aided skull repair prosthesis design and manufacturing, in particular to a computer-aided skull repair prosthesis design and manufacturing system. The system comprises a shape prediction unit for solving optimal shape coefficients and generating an initial prosthesis shape; a constraint evaluation unit for calculating a prosthesis conflict index and dividing a conflict level; a correction field generation unit for responding to the prosthesis conflict index, decomposing a physical violation amount, and solving a dense displacement field covering all vertices of the prosthesis through a shape correction propagation model; and a closed-loop optimization unit for applying the dense displacement field to geometric deformation of the initial prosthesis shape to obtain a corrected prosthesis shape, and re-submitting the corrected prosthesis shape to the constraint evaluation unit to execute a hierarchical final version strategy. The present application solves the contradiction between anatomical fidelity and clinical safety constraints in skull repair by constructing a system comprising shape prediction, constraint evaluation, correction generation and closed-loop optimization.

The utility model discloses a bone connection slip sheet structure, which relates to the field of skull repair of children, and comprises a repair component, the repair component consists of a fixed part and a sliding part, and the sliding part is embedded into the fixed part and is in sliding connection with the fixed part; according to the scheme, a slide way type bone connection mode is adopted, and compared with an existing titanium steel mesh fixing and repairing mode, the first repairing sliding piece and the second repairing sliding piece which are used for connection during skull repairing or long bone fracture connection can extend in a sliding mode, the firmness degree of connection between normal bones can be guaranteed, growth of the bones of children cannot be limited, and the safety of the children is improved. The bone repairing agent is very suitable for children bone repairing.

The utility model relates to a skull repairing body suitable for children. The skull repairing body comprises a covering part and an embedding part arranged on the lower surface of the covering part, the covering part comprises a contact area which is positioned above the embedding part and corresponds to the embedding part, and a plurality of extension parts which are distributed on the periphery of the contact area; wherein a containing cavity is formed between every two adjacent extension parts, and the containing cavities are used for installing non-rigid fixing devices. The utility model further relates to a skull repairing system comprising the repairing body. According to the skull repairing body, non-rigid fixation is adopted, the risk that rigid fixation possibly limits growth and development of the autologous skull and causes injury or infection is avoided, the covering part used for covering the autologous skull around the bone window is arranged, the repairing body obtains bearing force from the autologous skull, and the repairing body can be used for repairing the autologous skull. The problem that in the skull growth and development process of children, due to the fact that the defect area of the skull becomes large, fixing of the non-rigid fixing device fails, and then the skull repairing body falls off can be prevented.

The invention discloses a flexible conductive hydrogel stent with skull repairing and neural signal monitoring functions, which is prepared by taking polyvinyl alcohol-collagen-polylysine as a matrix, doping magnesium oxide nanoparticles and black phosphorus nanosheets, and finally performing freeze-induced phase separation and freeze-drying. The skull defect repair stent can be used as a skull defect repair stent to promote bone tissue regeneration, and can also be used as a flexible ECoG electrode to realize high-fidelity electroencephalogram signal monitoring.

The invention relates to the technical field of medical data processing, in particular to a skull repair implant material parameter configuration method and system, and the method comprises the following steps: obtaining the image data of a skull defect area, and determining the boundary information of skull defect based on the image data; according to the boundary information, obtaining physical attribute information of own bones adjacent to the boundary, and based on the physical attribute information, evaluating the bone regeneration capacity of an area adjacent to the boundary; determining skeleton regeneration potential distribution of each position in the skull defect area according to the skeleton regeneration capacity of the area adjacent to the boundary; performing unit division on the skull implant, and obtaining skeleton regeneration potential information corresponding to each unit of the implant according to the skeleton regeneration potential distribution; according to bone regeneration potential distribution of all positions in a skull defect area, material parameters of all units of the implant are finely configured, and precise matching of the degradation rate of the implant and the growth process of new bone tissue is achieved.

The invention discloses a method for assisting puncture drainage treatment of hypertensive cerebral hemorrhage based on a cranial surface locator and CT (Computed Tomography). According to the cerebral hemorrhage puncture treatment system, through cooperative application of the cranial surface locator and the CT three-dimensional reconstruction technology, the accuracy and safety of cerebral hemorrhage puncture treatment are remarkably improved. The positioner adopts stable combination of medical titanium alloy and standard steel balls, millimeter-level space coordinate calibration can be achieved, and the hematoma space position and the puncture path can be accurately measured and calculated before an operation in cooperation with a high-definition image obtained through thin-layer CT scanning. The stereotactic mechanism effectively avoids blindness of traditional bare-handed puncture, ensures that the drainage tube accurately reaches a hematoma core area at a time, greatly reduces the risk of mechanical injury to brain parenchyma in an operation, and considers equipment condition limitation of primary medical institutions. The positioner is made of leftover materials of a conventional skull repair operation, and does not need to depend on an expensive stereotactic frame or navigation equipment, so that the technical popularization cost is remarkably reduced.

The present application relates to a skull defect repair structure based on PEEK skull repair material, and relates to the field of skull repair technology. The structure includes a patch adapted for the skull defect area, the patch being provided with a plurality of grooves and holes extending through its thickness, and the holes being provided with switchable barriers. The grooves are provided on the side of the patch facing the scalp, and are used to guide the growth of scalp soft tissue and enhance the fusion of the patch with the skull. The holes are used to allow the climbing growth of scalp soft tissue after the repair structure is installed. After the scalp soft tissue grows into the holes, the barriers automatically switch from a connected state to a blocked state under the action of gravity, thereby limiting the penetration of the scalp soft tissue into the brain. This structure not only promotes the integration of the scalp soft tissue and the patch, but also helps protect brain tissue, improving the repair effect and the safety of the repair structure after installation.

The invention provides a skull repair implant, a preparation method thereof and a skull repair system. The skull repair implant comprises a main body part, the material of the main body part comprises polyaryletherketone, and the main body part is provided with a through hole; wherein the area, extending within 1cm from the edge of the main body part to the center of the main body part, of the main body part is a porous area, the porous area is provided with a plurality of microporous structures, and the microporous structures are filled with gel to form a composite part; and the gel extends out of the edge of the main body part to form a gel part. According to the skull repair implant, one-time fixation of an inert bone implant can be achieved, use is convenient, the operation time can be shortened, and the bone implantation process is rapid and convenient.

A high-purity magnesium skull repair mesh and its preparation method are disclosed, belonging to the field of biomedical materials. The repair mesh is made of high-purity magnesium with a purity of 99.95 wt%, and its surface roughness R... a,表面 The roughness R inside the pore is controlled within the range of 0.5~0.6 μm. a,孔 ≤ 0.8 μm. By precisely controlling the surface and internal roughness, a degradation rate of ≤0.2 mm / year was achieved for the repair mesh, a modulus ≥18 GPa after 12 weeks of implantation, and spontaneous disappearance of the degradation air bladder within 12 weeks, with a significant bone-promoting effect. The preparation method includes electrical discharge drilling, internal polishing, diamond wire slicing, and surface polishing. This invention solves the problems of excessively rapid degradation, poor morphological retention, and rapid decline in mechanical properties of existing magnesium-based cranial repair meshes, and is suitable for repairing bone defects in the skull, jawbone, radius, femur, and other bones requiring long-term mechanical support.

The utility model relates to a thickness-adjustable skull restoration body which is characterized by comprising an upper restoration piece and a lower restoration piece which are made of PEEK materials, the lower restoration piece is arranged below the upper restoration piece, the upper restoration piece is provided with a plurality of nail holes which penetrate through in the thickness direction and are used for rod portions of first screws to movably penetrate through, and the lower restoration piece is provided with a plurality of second nail holes which penetrate through in the thickness direction. The rod parts of the first screws penetrate through the corresponding nail holes and then are in threaded connection with the lower repairing piece, a distance is formed between the lower repairing piece and the upper repairing piece, the inner ends of the fixing plates are fixed to the edge of the upper repairing piece, and the outer ends of the fixing plates extend out of the upper repairing piece to be fixed to the skull. By selecting the first screws with different lengths, the distance between the lower repairing piece and the upper repairing piece can be changed, and then the overall thickness of the repairing body is adjusted.