K-file: Recommended use

The K-file is suited for the preparation of straight canals. It prepares dentin effectively both in filing motion (up and down) and when rotated. In slightly curved canals the recommended techniques are continuous rotation (lower picture) when the resistance is small and balanced force (upper picture) against greater resistance. Compared to reamers, the use of continuous rotation is limited because of the screwing effect typical of K-files.

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