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  • Author: Klaudia Kulcsár x
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Examination of Laser Microwelded Joints of Additively Manufactured Individual Implants

Abstract

Digital product processing and the utilization of novel, tissue-friendly materials allow the use of fixed dentures for patients. Its basis is a titanium plate fixed to the cortical bone surface at given screw positions. A digital dental cast is created from the existing bone surface, and modelling and necessary statistical analyses are carried out in a virtual environment. Safety of the welded joint is evaluated with mechanical methods. When designing the fixing points, an idealized denture is used that was previously designed for the patient. The number and position of pillar elements used for screw fixation of the denture are determined by the complex geometry of the denture itself, and the location, direction, and articulating position of existing teeth. The additively manufactured implant and the machined pillar sleeves are joined with laser-welding at given nesting positions. Homogeneity of the metallic material structure at the welded joint zone of the product is examined with micro-CT. Due to this implementation method, surgical time decreases together with complication rates and post-operative problems.

Open access
Moderization of Cortically Supported Individual Implants

Abstract

Digital product processing, 3D and finite element analysis techniques, modern, tissue-friendly implants with adequate surface treatment and proper screw-fixing make it possible for a good idea to successfully treat patients who do not have a sufficient amount of bone tissue for the implantation of conventional cylindrical-shaped dental implants. The duration of the surgical procedure of a complete, toothless jawbone becomes much shorter. Complicated measurements and risky techniques that require substantial expertise become unnecessary. The implant can be placed precisely into position with a simple surgical procedure. Then, it can be fixed to the bone tissue with the help of pre-designed fixation points. After this, only the professional closing of the wound has to be carried out. We have designed and manufactured a titanium cortical implant that is novel both in the view of chemical composition and surgical procedure. The final connection shaping of the sleeve and abutment system of the personalized cortical-backup implants was designed with the help of finite element analysis methods after the healing process.

Open access
Numerical Analysis of Additively Manufactured, Individual Titanium Implants Designed in a Virtual Environment

Abstract

The aim of this study is the design, manufacture, and development of a metallic rehabilitation device (titanium frame structure) that is created with a printing process. Product design is inspired by the Computed Tomography (CT) based reconstruction method, during which a metallic frame structure is designed that perfectly fits the retrieved bone surface. The internal structure of the designed metallic frames is a statically analysed three-dimensional construct which makes it possible to create individual product types. Constructs with different structure are checked by finite element analysis. Our goal is to establish a standardised manufacturing process, in which specific mechanical stressing can be carried out and optimal product type chosen, depending on different cases. At the end of this study, our solution of choice is demonstrated with surgical pictures.

Open access
The Influence of Heat Treatment on the Mechanical Properties of 3D-Printed Cobalt-Chrome Alloy Used in Dental Laboratory Practice

Abstract

The material used for manufacturing of dental implantation prostheses is cobalt-chromium alloy. The following study presents a new heat treatment technology for dental implantation prostheses. Specimens were created with the innovative technology of 3D printing. The brittleness of specimens subjected to heat treatment with parameters recommended by the manufacturer made it necessary for us to reconsider the heat-treating process. After changing given heat treatment processes, tensile and hardness tests were performed. From these tests, the optimal heat treatment process technology was chosen.

Open access
Addictive and Substractive Combined Production of Cobalt-Crome-Based Frames in Dentistry

Abstract

The following study analyses the use of modern 3D printing technology in dentistry with its necessary manufacturing and machining processes. Fitting of the manufactured metal structures is examined depending on their use, in terms of conventional adhesion-based denture designs and screw-fixed dentures on implants. Influencing factors and effects of the required post-processing steps are examined. Aspects such as sand-blasting, heat treatment, equipment and tools required for cutting are analyzed. The aim of this study is to create a manufacturing process that enables the required precision fitting of the created frame structure types.

Open access
Construction of Albumin-Coated 3D Allograft Based on Cone-beam CT Images

Abstract

The 3D block products presented in this study are used in dental surgery to provide bone replacement for patients who do not possess a sufficient amount of bone tissue for implantation. If dental implants are supported by a proper amount of allografts, the mastication ability of the patient can be totally restored. The required bone replacement for the insertion of dental implants is a reconstruction utilising lyophilized human bone tissue treated with alveolar and mandibular odontological albumin. This study puts emphasis on the analysis, planning and processing of CBCT images, and on the machining and production three-dimensional albumin-coated allograft. The study also extends to former and current bone grafting techniques, and provides a review on BoneAlbumin and the selection of suitable materials. This paper also investigates the domestic and international bone grafting market. Furthermore, it contains a case study and conclusions.

Open access