The SX-F3 serves dental practices that prepare root canals with a rotary motor and want a large taper system in six graded sizes. SOCO lists endodontic treatment as the setting, with the clinician choosing each file and setting the motor from the listed figures.
The six sizes range from a tip diameter of 16 in SX to 18 in S1, 20 in S2, 25 in F2, and 30 in F3. Tapers vary alongside them, from 02vt on S1 to 04vt on SX, S2 and F3 and 05vt on F1 and F2, which is the multi-taper variation SOCO describes.
Motor settings follow the size. Size SX runs at 300 rpm with 3.0 N.cm of torque; sizes S1 and S2 run at 350 to 375 rpm with 1.5 N.cm; and sizes F1, F2, and F3 run at 350 to 375 rpm with 2.0 N.cm. SOCO's recommended range of 300 to 375 rpm covers all six. The sizes and settings are listed together, which keeps the routine short.
Length forms part of the choice as well. Size SX is listed at 19 mm, and the other sizes at 21, 25, and 31 mm, so the clinician selects length and size together.
Packaging suits the way a practice orders. A single-colour box contains 6 pieces of one size for routine restocking, and a mixed box provides a range of sizes. The coloured bands let a dental assistant lay out the tray by colour, and the clinician reads the size from the handle during treatment.
