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Description:
in advance* Fixing the working length
* The preparation of the mid-part of the root canal
Use Sequence:
a. Open the pulp to form a straight line washing channel.
b. Explore the root canal with #10 and #15 K-files.
c. Press the root canal to rotate S1 deasil until it cut the dentinand unable to march on, then rotate S1 widdershins to make itdeviate from the dentin, repeat this step until up to the deepnessof #15 K-files. If necessary, use SX to enlarge the coronal.
d. Measure and fix the working length with # 15 K- files
e. Prepare S1 to the working length according to the methodreferred to step c.
f. Prepare S2 to he working length
