Controlled coefficient of thermal expansion vitreous enamel composition for electrosurgical tool

An article comprising:

• (a) an electrosurgical cutting blade formed as a monopolar device, the electrosurgical cutting blade comprising a metal electrode having a coefficient of thermal expansion and an exposed cutting edge, and
• (b) a solidified vitreous enamel coating on at least a portion of the metal electrode but not on the exposed cutting edge, the solidified vitreous enamel coating comprising a glass-ceramic composition having a crystalline phase and an amorphous phase, and a coefficient of thermal expansion within less than ±30% of the vitreous enamel-coated metal electrode coefficient of thermal expansion, wherein the vitreous enamel-coated electrosurgical cutting blade exhibits a percent blade width reduction no lower than −12% according to a Blade Width Reduction Test, wherein the Test is performed by manually wearing out the blade on porcine tissue using plasma and a PEAK AEX™ electrosurgical generator from Medtronic operated for 10 minutes at Cut Mode 10 followed by 10 minutes at Coagulation Mode 8, and with the percent blade width reduction being based on the width of the vitreous enamel-coated blade measured before and after the Test.