37 results about "Bone specimen" patented technology

A method of in vitro or in vivo nuclear magnetic resonance and / or magnetic resonance imaging, to determine bone properties by measuring the effects of molecular diffusion inside the bone specimen to derive parameters that are related to the structure of the trabecular bones. The method is a non-invasive probe that provides topological information on trabecular bone without requiring a full high-resolution image of its structure, and is compatible with clinical use.

The invention discloses a making method for a fracture model of artificial bone, which comprises the following steps: carrying out continuous spiral CT (computed tomography) scanning on affected bone along the cross section to obtain a multi-layer image, storing according to a Dicom 3.0 standard and making out a three-dimensional reconstruction model of the bone and a fractured section by utilizing Mimics software; fractioning the model to be processed by UG (Unigraphics) software and making an appearance mold of the bone and a mark groove for the position of a fracture line of the archetypal bone by numerically-controlled mill processing; and carrying out three-dimensional printing to obtain a fractured section model, also placing at the position of the mark groove of the corresponding bone appearance mold, jointing an upper mold and a lower mold, filling polymethyl methacrylate, standing at room temperature, solidifying and taking out the fractured section model so as to obtain a specimen of the fracture model of the artificial bone. In this way, the prepared fracture model is made in one step, and the complicated processes of obtaining a bone specimen and afterwards making fracture artificially, the consumption of equipment and the worry of enhancing the cost are omitted. The condition of stress between fractured sections is comprehensively and truly reflected by an obtained fracture interface, and the assistance is provided to the treatment of clinical fracture.

An orthopedic fastener rated to be received into a corresponding bone specimen. The corresponding bone specimen has an overall outer thickness from near cortex to far cortex. Preferably, but optionally, the corresponding bone specimen also has a predetermined bone hole preparation which includes a pilot hole through the near cortex and into the far cortex. The fastener itself comprises a plurality of cutting flutes on one end. The cutting flutes transition into a tapered male threaded portion. The tapered male threaded portion provides a plurality of self-tapping threads. The self-tapping threads taper from a minimum thread crest diameter Dmin proximal to the cutting flutes to a maximum thread crest diameter Dmax distal from the cutting flutes. The cutting flutes are further rated to ream the pilot hole, when provided, to a diameter of about Dmin.

An orthopedic fastener rated to be received into a corresponding bone specimen. The corresponding bone specimen has a predetermined bone hole preparation including a tapered female threaded section. Threads on the tapered female threaded section have a pre-selected thread profile. The fastener itself comprises a male tapered threaded portion. Threads on the male tapered threaded portion are rated to mate, according to the pre-selected thread profile, with corresponding threads on the tapered female threaded section. The pre-selected thread profile has a predetermined thread geometry. The thread geometry is predetermined so that, when the male tapered threaded portion on the fastener is fully engaged in the tapered female threaded section on the bone hole preparation, a predetermined further tightening of the fastener imparts a corresponding predetermined radial preload on bone tissue surrounding the tapered female threaded section.

The invention discloses a method for defatting a bone specimen. The method includes the following steps: S1. After punching holes at both ends of the deboned bone, soak the bone in 10% to 15% degreasing agent for 45 to 50 hours, and use a pressure water gun to wash away the impurities floating on the surface of the bone. Impurities; S2. Put the bones in a mixed solution of methylal-acetone, seal until the bones are degreased and clean, and no yellow in the bones can be seen with the naked eye; S3. Rinse off the grease on the surface of the bones with a pressure water gun, and contain 5% to 10 Soak in water with % degreasing agent for 2-3 hours, then wash. The invention greatly shortens the degreasing time of bone specimens, the degreasing treatment of bones is clean and complete, avoiding damage to the bones, the degreasing method is simple, the degreasing effect is better and more thorough, and the degreasing time is short, which reduces the preparation of specimens to a certain extent It saves time, improves production efficiency, and has great application potential.

The invention provides a method for protecting bone specimens by a vacuum impregnation technique. The method includes the following steps: soaking pretreated bone samples in a working fluid, performing vacuum decompression to the 5% standard atmospheric pressure, and soaking the bone samples until bubbles disappear; soaking the treated bone samples in a protecting liquid until the interiors and the surfaces of bones are initially cured with paint films; subjecting the treated bone samples to desolventizing and dry curing to obtain the bone specimens. The method has the advantages that the paint films on the surfaces of the bone specimens are thin and uniform, and the bone specimens are protected internally and externally, so that the service life of the bone specimens is prolonged, and theshortage of remains resources is alleviated.

The invention provides a bone specimen degreasing and bleaching apparatus. The apparatus degreases and bleaches animal bones in a semiautomatic or fully-automatic mode in order to obtain an ideal specimen. The apparatus comprises a degreasing tank and a bleaching tank paralleling to the degreasing tank, the degreasing tank and the bleaching tank are respectively movably provided with lids, the apparatus also comprises a track device arranged above the degreasing tank and the bleaching tank, and a hanging basket, and the hanging basket is fixedly provided with a hanging rod; and the track device is movably provided with a dolly, the dolly is provided with a motor, and the motor is in transmission connection with the hanging rod through an elevating device. Stirring paddles are arranged in the degreasing tank and the bleaching tank; and temperature control devices are arranged in the degreasing tank and the bleaching tank. The track device comprises a left track and a right track paralleling to the left track, and the hanging rod traverses through a gap between the left track and the right track, and is connected with the elevating device. The apparatus also comprises a control system and a temperature and concentration monitoring and adjusting system.

The preparation method and specimen of intraosseous blood vessel anatomical display display specimen of the present invention, wherein the method comprises: obtaining fresh femur or tibial specimen; removing cortical bone, immersing and fixing in formalin; using EDTA decalcifying agent to soak and decalcify; using CT thin Layer scanning to find the femoral intercondylar foramen or tibial intercondylar foramen; enter the anatomy through the above-mentioned holes to reveal the blood vessels and the intraosseous vascular channels containing the blood vessels; put the dissected bone specimens into the container box and add resin After the bone specimen is submerged, the resin gradually enters into the bone specimen; put the container box into the incubator, remove the container box after the resin hardens, and take out the specimen; cut off the excess resin, and polish to complete the production. By using the manufacturing method of the present invention, 100% of intraosseous blood vessel channels and intraosseous blood vessels can be exposed, and the existence and distribution of intraosseous blood vessels in the bone can be visually displayed; if it is a pediatric bone specimen, it can also be revealed that intraosseous blood vessels pass through the epiphyseal plate situation.

The invention discloses a method of removing meat from a bone specimen. The method comprises the following steps: 85%-90% of soft tissues are removed from an animal carcass, and a bone part is kept; the bones are then divided to limb, skull, thorax, lumbar vertebra and hipbone parts, and the parts are packaged respectively; after a mixed solution is prepared by protease, a degreasing agent and water with a mass ratio of 20-50 to 1-2 to 2000-2100, and thermostatic waterbath is carried out; the well-packaged bones are put in the mixed solution respectively, the bones are just immersed by the mixed solution and are soaked for 4 to 5 h, the soft tissues are washed out by high pressure water, and the impurities on the bones are removed; and the bones are then put in the mixed solution again andare soaked until no impurities exist on the surfaces of the bones, the bones are taken out, the soft tissues are washed out by high pressure water, and then, the bones are washed clean by using a detergent. The processed bones are clean and complete, damages of the bones are avoided, the meat removal method is simple, the meat removal time is shortened in a condition of maintaining the integrityof the bones, and the application potential is great.