Disposable Carbon Steel Surgical Blades, Sklar. Sharp, Curved, #15C. Sklar's Disposable, Sterile, Carbon Steel Surgical Blade #15C is most commonly used in dentistry and in periodontal procedures. The #15C blade features a longer cutting edge than the #15 blade and when combined with a long style handle provides an even more extended reach for the user. Disposable blades are available in bulk quantities of 100 per box.