Dozór Techniczny (Technical Supervision) 2021/01

  • It will only be the Industrial Autumn
    STOM cycle with accompanying events and shows Foundry METAL will be held at Kielce Trade Fairs autumn 2021 years Dates individual events and exhibitions organized at Kielce Trade Fairs in 2020 were mainly dependent on the epidemiological situation.
  • Prospects in the use of surgical robots control systems in step ś snip welding and welders training using communication distances SC
    The paper discusses various possibilities of remote welding using a surgical robot equipped with a digital camera, used to observe the weld zone, and in particular difficulties in detecting the boundaries of the weld pool. The difference in the processing of the real image by the human brain is discussed in comparison to the image in the form of a film from a digital camera. Three models of human image recognition have been presented, one of which has already been studied by scientists from Cambridge. The concept of melting the base material by controlling the weld pool at the pressure of non-ionized arc gases as well as measuring the third dimension of the weld pool and determining the depth of weld fusion using electronic devices is discussed. The required trajectories for the movement of the electrode tip are presented, based on the physics of the welding arc and welding technology, and the difficulties encountered during the training of welders. The basis of the neural model of the brain is presented together with the vector model of artificial intelligence.
  • Selected issues of joining biomaterials
    The article presents the most frequently used methods of joining biomaterials in three areas. The first one covers bonding methods, as a result of which implants for medical applications are produced, and concerns the sintering of Co-Cr-Mo metal powders with methods allowing to obtain the assumed operational properties of a hip joint prosthesis. The second area concerns the classic methods of joining biomaterials: arc and laser welding, especially new methods of laser welding of dental implants and welding of titanium alloys with the TIG method. The third area of joining biomaterials involves connecting the implants to the tissue. An example of bonding with modified bone cements together with the working conditions of a cement bond is presented on the example of a hip joint endoprosthesis connection.  The basic factors determining the course of the process of formation and exploitation of joints are also discussed, including issues such as: toxic reactions, heat damage, infections, loosening and water absorption. The results of research on the doping of cement bonds with aqueous solutions containing bioactive modifiers stimulating tissue growth in the vicinity of the implant were also presented. Sintering in the production of implants Prosthetics is responsible for replenishing the tissue defects with artificial substitute material in the form of foreign bodies implanted into the body - a prosthesis or an implant. Implantation is performed in order to restore the natural functions of the body or improve the aesthetics of a damaged organ. Most commonly used are implants to replace hard tissue such as bones and joints. It is very popular to implant hip joint endoprostheses and, more rarely, knee joint prostheses. Implants are also used in dentistry to replace lost teeth. Recently, there has been an increased interest in methods of making implants from porous biomaterials.
  • 3D printing in dentistry
    In dentistry, a high level of personalization is always necessary, as each person has unique teeth. In the case of traditional manual work methods, the quality of the finished products is highly dependent on the skill of the technician. Obtaining high-quality dental products with many potential sources of error is extremely difficult. Additive manufacturing, which has already been used in many areas, is also perfect in dentistry. More and more dental offices and prosthetic laboratories are investing in specialized 3D printers designed for fast and precise printing of entire dental arches or individual teeth. Using biocompatible materials, it is possible to use 3D printers to produce orthodontic models, dentures, implants, highly accurate models of crowns and bridges, splints, inlays, onlays, overlays, templates, retention devices and many others. The use of additive technologies in dental treatment is not more complicated than traditional methods. Using an oral scanner or computed tomography, an accurate image of the place to be supplemented with a filling, implant or prosthesis is obtained. The obtained data is used to create a computer model of the complement. Then, on the basis of the model, the 3D printer prints the element, applying successive layers of a special powder, which is then hardened with a laser beam. The created restoration is ideally suited to the anatomical structure of the patient's teeth. Alternatively, stationary scanners in dental laboratories can be used to scan traditional impressions of alginates and PVS (addition silicones) or PE (polyethers) masses.

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