SINTX Technologies. has been granted a patent for methods that enhance the wear performance of silicon nitride and other ceramic materials, specifically for biomedical implants. The patented process involves forming a silicon nitride block and subsequently oxidizing it to create a silicon oxynitride material with improved properties. GlobalData’s report on SINTX Technologies gives a 360-degree view of the company including its patenting strategy. Buy the report here.
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According to GlobalData’s company profile on SINTX Technologies, Prosthetic cardiac valves was a key innovation area identified from patents. SINTX Technologies's grant share as of July 2024 was 33%. Grant share is based on the ratio of number of grants to total number of patents.
Improving wear performance of silicon nitride for biomedical implants
The patent US12070391B2 outlines a method for preparing a silicon oxynitride material that exhibits enhanced wear performance, particularly suitable for use in prosthetic joints. The process begins with the formation of a silicon nitride material block, which is achieved by preparing a slurry containing silicon, oxygen, nitrogen, and optionally yttrium oxide or aluminum oxide. This slurry is then milled and dried to create a dried slurry, which is subsequently oxidized through hydrothermal methods. The oxidation process is specified to occur at a pressure of approximately 2 atmospheres and a temperature range of 120°C to 135°C, with a preferred temperature of 132°C maintained for about 72 hours.
The resulting silicon oxynitride material is characterized by a unique surface chemistry that enhances its wear resistance, potentially extending the longevity of prosthetic joints, such as femoral heads, beyond 15 years. The material's surface features periodic pits and defects that are filled with silica glass post-oxidation, contributing to its durability. Notably, the hydrothermal oxidation process leads to a significant reduction in O—Si—N and N—Si—N bonds, favoring the formation of O—Si—O bonds. Additionally, there is a notable decrease in silicon amine functional groups, replaced by silanol functional groups, which further lubricates the surface and improves wear performance. This innovative method presents a significant advancement in the development of materials for medical applications, particularly in enhancing the performance and lifespan of prosthetic devices.
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GlobalData Patent Analytics tracks bibliographic data, legal events data, point in time patent ownerships, and backward and forward citations from global patenting offices. Textual analysis and official patent classifications are used to group patents into key thematic areas and link them to specific companies across the world’s largest industries.
