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This Defense Intelligence Reference Document, dated 7 January 2010, was prepared by the Defense Intelligence Agency's Defense Warning Office. It is one of a series of advanced technology reports produced in FY 2009 under the Advanced Aerospace Weapon System Applications program. The report reviews biomaterials used in medicine, including silicones, Teflon, biodegradable polymers, hydrogels, titanium, ceramics and tissue constructs, and applications such as stents, joints, contact lenses, drug delivery and dialysis. It concludes that most innovation lies in new ways to apply existing materials.
From the source:Release of 2026-09-18 Incident: 1/7/10, Las Vegas, Nevada. Released with redactions. This document is a Defense Intelligence Reference Document (DIRD), a technical reference format used by the Defense Intelligence Agency (DIA) to capture baseline knowledge on a specific topic for later analytic use. DIRDs are best understood as reference and synthesis products rather than as original research. It is one of 38 DIRDs produced under the Advanced Aerospace Weapon System Applications Program (AAWSAP) between 2009 and 2011. Because AAWSAP’s scope permitted a broad range of supporting topics, not every DIRD in the series directly concerns aerospace systems or future threat assessment. The following summary reflects the DIRD’s scope and framing at the time of writing and should not be read as implying current validation of the concepts discussed. This DIRD is a broad survey of biomaterials, including metals, polymers, ceramics, glasses, and composites designed to interact with living tissue, and argues that their value depends mainly on biocompatibility, reliability, and careful matching of material properties to specific medical uses. The report reviews major application areas including biosensors, implants, cardiovascular devices, contact lenses, drug delivery systems, tissue constructs, titanium devices, and dialysis membranes, emphasizing that no single biomaterial works best in every setting. Its overall conclusion is that biomaterials are already foundational to a large medical-device industry and save or improve millions of lives, but that progress tends to be slow because safety testing is stringent; as a result, most advances come from improved ways of applying established materials such as silicone, Teflon, biodegradable polymers, ceramics, and titanium in new devices and clinical settings rather than from radically new substances.
UNCLASSIFIED/ /FOR OFFl&IAl l:ISE 8HlY Two common ceramics used in dentistry and hip prostheses are alumina and hydroxyapatite (HA). HA is a major component of the inorganic compartment of bone. Commercially prepared HA is processed using a technique of phosphoric acid and hydrothermal exchange that produces a porous, "bone-like" morphology in the resulting structure. Figure 16 shows this result. When implanted into bone defects, HA supports bone growth through the pores and, thus, becomes an intermediate scaffold, as well as an eventual support matrix. Hydroxyapatite composites have been successfully used to repair, reconstruct, and replace diseased or damaged body parts, especially bone. They have been used in vertebral Figure 16. Hydroxyapatite Porous Bone-Like Structure prostheses, intervertebral spacers, After Commercial Processing bone grafting, middle-ear bone replacements, and jawbone repair. Aluminum oxide, or alumina (Al2O3), has been used in orthopedic surgery for more than 20 years as the joint surface in total hip prostheses because of its exceptionally low coefficient of friction and minimal wear rates. Alumina has excellent corrosion resistance, good biocompatibility, high strength, and high wear resistance, making it ideal for orthopedic applications. Other bioceramics include coral skeletons, which can be transformed into hydroxyapatite by high temperatures. Their porous structure allows relatively rapid ingrowth of living cells at the expense of initial mechanical strength. The high temperature also burns away any organic molecules, such as proteins, preventing graft-versus-host disease and rejection. Bioceramics made from a calcium phosphate material containing tiny pores have been used to coat metal joint implants or as unloaded space fillers for bone ingrowth. Tissue ingrowth into the pores occurs, with UNCLASSIFIED/ /FOR AFFICIOla l'ili QNkY Figure 17. Bioceramic Used in Artificial Hip Replacement Component 12
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Official release, from the pursue collection. The PDF is mirrored here; the original link is above. 32 pages are in the text index: search them above, or from the library's search.