Biological Materials Science: Poster Session
Sponsored by: TMS Functional Materials Division, TMS Structural Materials Division, TMS: Biomaterials Committee
Program Organizers: Steven Naleway, University of Utah; Jing Du, Pennsylvania State University; Rajendra Kasinath, DePuy Synthes (Johnson and Johnson); David Restrepo, University of Texas at San Antonio
Monday 5:30 PM
February 24, 2020
Room: Sails Pavilion
Location: San Diego Convention Ctr
Session Chair: Steven Naleway, University of Utah; Jing Du, Pennsylvania State University; Rajendra Kasinath, DePuy Synthes (Johnson and Johnson); David Restrepo, University of Texas at San Antonio
B-22: Fabrication and Shape Memory Characteristics of Non-toxic Ti-Zr-Nb-Sn Biomaterials: Yeon-Wook Kim1; Tae-hyun Nam2; Myunghwan Byun1; 1Keimyung University; 2Gyeongsang National University
Ti-Zr-Nb-Sn alloys have been considered as promising biomedical metallic materials due to non-toxicity of Ni-free, good shape memory effect and superelasticity. Alloy fibers were prepared by melt overflow technique. The fibers were uniformly put into the predetermined packing chamber of the mold pressing equipment and the pressure was applied by screwing the bolts. The porous scaffolds with 75% porosity were produced by a solid state sintering at 1300oC and for 1 hour under the high vacuum. The porous specimen has a wide range of porosity, a large pore size, and three-dimensional network structures and then open pores of biomaterials can enhance bone in-growth, and thus improve fixation at the interface between bones and implants. The critical aim of this research is to determine the most appropriate Ti-Nb-Mo composition and to develop porous β-type Ti-Nb-Mo alloy with controlled architecture for cell renewal with emphasis on strength for biomedical applications.
B-23: Mechanical, Physical, and Morphological Characterization of a Composite Made from Luffa Cylindrica and EVA Copolymer: Alejandro Restrepocarmona1; Henry Colorado1; 1University Of Antioquia
The need for teeth protection in contact sports is an interesting biomedical topic. Mouthguards in the market come in four types, and the custom-made version is the most appropriate for players. Composites have been a good alternative for approaching energy absorption issues in shock impact protection needs on parts for automobiles, aircraft, sports, among others. Several composites can be obtained depending on processing, type of material, and product shape. New composites may come out from natural fibers (nf) and polymers (poly) in sandwich structures using nf as reinforcement and poly as the matrix. In this work, a new composite from loofah (Luffa cylindrica) and Ethylene Vinyl Acetate (EVA) was created. Its morphological, physical, and mechanical properties were characterized as well as statistical analyses using Statgraphics or R software were undertaken.
B-24: Quantitative Study of Banana Green Peel Tannins for Preparing a Bioma Terial: Elisângela Ferreira1; Veronica Candido1; Rafaela Pinheiro1; Alisson Silva1; Sergio Monteiro2; Samara Marques1; 1Universidade Federal do Pará; 2Federal University of Rio De Janeiro
This study aimed to characterize a green banana peel in relation to the amount of tannins in different extracts for the preparation of a biomaterial. Three extracts were used: by decoction, by reflux and with the powder of the banana peel. The extracts were filtered and the total tannin content was determined by the colorimeter method using the Folin-Ciocalteau reagent. The sample was mixed with the reagent, let the reaction and made a reading at 726nm in a spectrophotometer. It was based on a standard curve and then prepared aqueous solutions at concentrations of 1 to 9 mg/L. The highest amount of tannins was found in the extract prepared by decoction followed by the extract made by the reflux. The methods of extraction a warm were the most effective for extraction of tannins and in a way that can be used in the preparation of a biomaterial.
B-25: Radiopacifying Bismuth Oxide-based Composite Powder Prepared by High Energy Ball Milling: Pee-Yew Lee1; 1National Taiwan Ocean University
Mineral trioxide aggregate (MTA) serves as dental filling materials and consists mainly of Portland cement (75%), bismuth oxide (20%), and others. Bismuth oxide is rare-earth metal oxide and serves as radiopacifier within MTA. Concerning the replacement of bismuth oxide, zirconium oxide and tantalum oxide with their excellent mechanical properties and biocompatibilities are among the best potential materials. In the present study, composite (BiO2)100-x(ZrO2 or Ta2O5)x (x = 0, 5, 10, 15, and 20) powder were prepared by high energy ball milling process. After 3hrs of milling, the as-milled composite powder were further heat treated at 400 oC for 2 hours. The as-milled and heat-treated powder were then mixed with Portland cement and deionized water to prepare MTA. Experimental results showed that a significant improvement in radiopacity of MTA can be achieved using as-milled composite powder. The MTA prepared by 3h as-milled (BiO2)95(Ta2O5)5 powder exhibited the best radiopacity.