Gold Heat Treatment

Gold heat treatment is a proprietary thermal process developed by Dentsply Sirona that raises the austenite finish temperature (Af) above 37°C, placing the alloy predominantly in the martensite phase at body temperature. Martensitic NiTi is significantly more flexible than austenitic NiTi, reducing lateral forces on canal walls and cutting resistance. Clinical studies show Gold-treated files offer two to four times greater cyclic fatigue resistance compared to conventional M-Wire instruments, making them the preferred choice for severely curved canals. The characteristic gold surface color results from a thin oxide layer formed during heat treatment.