Given technique is called as:
Correct Answer: Crown down technique
Description: Crown-Down Technique
Numerous modifications of the original step-down technique have been introduced, including the description of the crown-down technique. The more typical step-down technique includes the use of a stainless steel K-file exploring the apical constriction and establishing working length.
In contrast, a crown-down technique relies more on coronal flaring and then determination of the working length later in the procedure.
The more typical crown-down, or double-flare technique consisted of an exploratory action with a small file, a crown-down portion with K-files of descending sizes, and an apical enlargement to size #40 or similar. The original technique included stepping back in 1-mm increments with ascending file sizes and frequent recapitulations with a small K-file and copious irrigation. It is further emphasized that significant wall contact should be avoided in the crown-down phase to reduce hydrostatic pressure and the possibility of blockage. Several studies demonstrated more centered preparations in teeth with curved root canals shaped with a modified double-flare technique and Flex-R files compared to shapes prepared with K-files and step-back technique.
A double-flare technique was also suggested for ProFile rotary instruments.
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