Matthew Di Prima
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View article: Optimization of fused filament fabrication process parameters to improve the compressive properties of PEEK and PEKK biomaterials
Optimization of fused filament fabrication process parameters to improve the compressive properties of PEEK and PEKK biomaterials Open
Fused filament fabrication (FFF) is increasingly being adopted to create polymeric orthopedic devices. FFF process parameters determine the mechanical performance of final printed parts; hence, optimizing for appropriate levels of strength…
View article: Additive manufacturing inert gas flow path strategies for multi-laser powder bed fusion systems and their impact on lattice structure mechanical responses
Additive manufacturing inert gas flow path strategies for multi-laser powder bed fusion systems and their impact on lattice structure mechanical responses Open
Multi-laser Additive Manufacturing systems hold great potential to increase productivity. However, adding multiple energy sources to a powder bed fusion system requires careful selection of a laser scan and inert gas flow strategy to optim…
View article: The strategy for American leadership in high-consequence additive manufacturing
The strategy for American leadership in high-consequence additive manufacturing Open
Over the past decade, a consistent theme in enhancing U.S. global competitiveness has been the need for U.S. leadership in critical advanced manufacturing technologies. Additive manufacturing (AM), also known as 3D Printing, has been among…
View article: Dimensional variability characterization of additively manufactured lattice coupons
Dimensional variability characterization of additively manufactured lattice coupons Open
Background Additive manufacturing (AM), commonly called 3D Printing (3DP), for medical devices is growing in popularity due to the technology’s ability to create complex geometries and patient-matched products. However, due to the process …
View article: A comparison of metal/metal and ceramic/metal <scp>taper‐trunnion</scp> modular connections in explanted total hip replacements
A comparison of metal/metal and ceramic/metal <span>taper‐trunnion</span> modular connections in explanted total hip replacements Open
Corrosion and wear are commonly found at the taper‐trunnion connection of modular total hip arthroplasty (THA) explanted devices. While metal/metal (M/M) modular taper‐trunnion connections exhibit more wear/corrosion than ceramic/metal (C/…
View article: Temperature dependence of nickel ion release from nitinol medical devices
Temperature dependence of nickel ion release from nitinol medical devices Open
Nitinol exhibits unique (thermo)mechanical properties that make it central to the design of many medical devices. However, nitinol nominally contains 50 atomic percent nickel, which if released in sufficient quantities, can lead to adverse…
View article: Larger surface area can reduce nitinol corrosion resistance
Larger surface area can reduce nitinol corrosion resistance Open
Surface area has long been thought to influence the corrosion behavior of medical devices although this phenomenon has not been systematically investigated. Because many nitinol implants are offered in a range of sizes, understanding the i…
View article: Specimen-Specific Finite Element Models for Predicting Fretting Wear in Total Hip Arthroplasty Tapers
Specimen-Specific Finite Element Models for Predicting Fretting Wear in Total Hip Arthroplasty Tapers Open
Products from fretting wear and corrosion in the taper junction of total hip arthroplasty (THA) devices can lead to adverse local tissue reactions. Predicting damage as a function of design parameters would aid in the development of more r…
View article: Comparison of ASTM F2129 and ASTM F746 for Evaluating Crevice Corrosion
Comparison of ASTM F2129 and ASTM F746 for Evaluating Crevice Corrosion Open
Crevice corrosion is one of the major mechanisms that drives implant failure in orthopedic devices that have modular interfaces. Despite the prevalence of crevice corrosion in modular interfaces, very little is known with regards to the su…
View article: Effect of wire fretting on the corrosion resistance of common medical alloys
Effect of wire fretting on the corrosion resistance of common medical alloys Open
Metallic medical devices such as intravascular stents can undergo fretting damage in vivo that might increase their susceptibility to pitting corrosion. As a result, the US Food and Drug Administration has recommended that such devices be …
View article: The effect of fatigue on the corrosion resistance of common medical alloys
The effect of fatigue on the corrosion resistance of common medical alloys Open
The effect of mechanical fatigue on the corrosion resistance of medical devices has been a concern for devices that experience significant fatigue during their lifespan and devices made from metallic alloys. The Food and Drug Administratio…
View article: Current practices in corrosion, surface characterization, and nickel leach testing of cardiovascular metallic implants
Current practices in corrosion, surface characterization, and nickel leach testing of cardiovascular metallic implants Open
In an effort to better understand current test practices and improve nonclinical testing of cardiovascular metallic implants, the Food and Drug Administration (FDA) held a public workshop on Cardiovascular Metallic Implants: corrosion, sur…