________________________________________________________________________________________ KRESZINGER, M., B. TOHOLJ, A. AČANSKI, S. BALOŠ, M. CINCOVIĆ, M. PEĆIN, M. LIPAR, O. SMOLEC: Tensile strength retention of resorptive suture materials applied in the stomach wall -an in vitro study. Vet. arhiv 88, 235-243, 2018. ABSTRACTThe primary objective of this study was to determine whether polyglyconate or polydioxanone resorptive surgical materials are superior in terms of tensile strength retention in implantation in the cadaveric submucosa of the stomach wall. A secondary objective was to compare the tensile strength retention, in the same conditions, of polydioxanone suture materials produced by different manufacturers. Five samples of resorptive suture materials (polyglyconate (Maxon ® , Covidien), polydioxanone (PDS ® , Ethicon, PDX ® Kruuse, Surgicryl ® SMI), Catgut chromic, Kruuse) all diameter USP 2-0, were incubated in vitro in the cadaveric submucosa of the stomach wall for fifty days. Measurements of tensile strength were made on day 0 and the 10 th day. Polyglyconate (Maxon ® ) showed the greatest initial tensile strength. After 10 days of incubation in the submucosa of the stomach, the tensile strength decreases more rapidly for polyglyconate (Maxon ® ) in comparison to polydioxanone sutures, but they were still higher compared with the others on the 10 th day. Polydioxanone Surgicryl ® had the highest tensile strength retention -91.4% after 10 days of incubation in the submucosa of the stomach. Polydioxanone PDX ® maintained only 58.5% of its initial tensile strength. Polydioxanone Surgicryl ® had the highest initial Young's modulus.

The paper presents an overview of metal additive manufacturing technologies. The emphasis is on unconventional emerging technologies with firm background on welding technologies such as Ultrasonic Additive Manufacturing, Friction Additive Manufacturing, Thermal Spray Additive Manufacturing, Resistance Additive Manufacturing and Wire and Arc Additive Manufacturing. The particular processes are explained in detail and their advantages and drawbacks are presented. Attention is made on materials used, possibilities to produce multi-material products and functionally graded materials, and typical applications of currently developed technologies. The state-of-the-art on the Wire and Arc Additive Manufacturing is presented in more detail due to high research interests, it’s potential and widespread. The main differences between different arc additive manufacturing technologies are shown. An influence of processing parameters is discussed with respect to process stability and process control. The challenges related to path planning are shown together with the importance of post-processing. The main advantage of presented technologies is their ability of making larger and multi-material parts, with high deposition rate, which is difficult to achieve using conventional additive technologies.