Question

Which of the following hand files has its spiral edges arranged so that cutting occurs only on the pulling stroke, making the dentinal walls smooth and easier to fill?

1) Hedstrom file
2) K-file
3) Reamer file
4) Broach file

Answer 1

The Hedstrom file has spiral edges that cut only on the pulling stroke, making dentinal walls smooth and easier to fill.

Step-by-step explanation:

The hand file that has its spiral edges arranged so that cutting occurs only on the pulling stroke, making the dentinal walls smooth and easier to fill, is the Hedstrom file. The Hedstrom file is commonly used in dentistry for shaping and cleaning the root canal during root canal treatment.

Unlike other hand files such as the K-file, Reamer file, and Broach file, the Hedstrom file is designed specifically to cut on the pulling stroke. This design helps to minimize the risk of damaging the dentinal walls and ensures a smoother surface for filling.

Overall, the Hedstrom file is an essential tool in root canal therapy as it allows for precise and effective shaping of the root canal system.