The SAS Kerrison is always as sharp as ‘first-use,’ reducing procedure time, improving accuracy, and optimizing patient safety. The cutting/biting edge sharpness (as measured by Blade Sharpness Index) of most kerrisons decreases by approximately 15% after a single surgical use, and by as much as 50% after use in only four surgeries, yet reusable kerrisons are rarely sharpened before 20 or more surgical uses.² Studies have also shown a direct correlation between sharpness and post sterilization bone contamination.² Spartan’s Sterile, Always Sharp Kerrison avoids these common dangers of reusable kerrisons, providing a biting blade that is always perfectly sharp.