Page 12 - tech fest 2025 אשדוד חוברת תקצירים

12
Printed CoCr for Dentistry: The Relationship between Printing Geometry and Electrochemical Behavior
ChE-A-07
Bar Bargig; barbargig@gmail.com
Advisor: Dr. Guy Ben Hamu
SCE - Shamoon College of Engineering, Ashdod
Cobalt-chromium (Co-Cr) alloys are extensively used in dental applications due to their high mechanical strength, corrosion resistance and biocompatibility. Although additive manufacturing offers advantages, such as improved microstructural uniformity and reduced porosity, the impact of structural geometry on corrosion resistance is not yet fully understood. This study explores the effect of varying 3D-printed Co-Cr component geometries on corrosion behavior in a simulated oral environment using synthetic saliva. Through electrochemical testing and hardness measurements, the research assesses how geometry affects material performance and electrochemical stability. The results deepen our understanding of the geometry-corrosion relationship, contributing to the design of dental restorations with superior corrosion resistance and lower metal ion release—ultimately improving long-term clinical outcomes.
Keyword: Cobalt-chromium (Co-Cr), corrosion resistance, dental applications, electrochemical testing, 3D-printed Co-Cr
Acrylated Lamin Proteins for Photocrosslinked Bioadhesives with Enhanced Mechanical Strength
ChE-A-08
David Grabarnik; david76401@gmail.com
Advisor: Dr. Kfir Ben-Harush
SCE - Shamoon College of Engineering, Ashdod
Lamin protein-based nanofilaments, known for their exceptional mechanical resilience, are emerging as promising candidates for bio-based adhesives. This study explores the development of durable, biocompatible adhesives by acrylating recombinant lamin proteins using methacrylate chemistry. The acrylated lamin is crosslinked via photopolymerization, employing Irgacure 2959 as a photoinitiator activated by UV light at 365 nm. This process forms a robust, three-dimensional nanofilament network, enhancing both adhesion (surface bonding) and cohesion (internal strength). Adhesive performance is evaluated by lap shear testing, to optimize formulations for medical, biotechnological and industrial applications. This approach leverages the structural integrity of lamin proteins and the efficiency of photoinitiated crosslinking to create sustainable, high-performance adhesive materials.
Keywords: acrylation, bioadhesives, lamin, nanofilaments, photopolymerization