- One instrument only can prepare a root canal
- Effective with less steps, time saving
- Special screw thread, reciprocating motion
- 3 sizes can be chosen for different root canals
![DENCO rotary file ONLY ONE FILE](https://cdn-ecgpa.nitrocdn.com/tQzbOMTUdnnLiSZFbOwrkYqxaaAaebpc/assets/static/optimized/wp-content/uploads/2021/11/28f004168656e7600965386c358e7038.only-one-file.png)
Operation instruction
![DENCO rotary file ONLY ONE FILE details](https://cdn-ecgpa.nitrocdn.com/tQzbOMTUdnnLiSZFbOwrkYqxaaAaebpc/assets/static/optimized/wp-content/uploads/2021/11/122aa1da7828088e7e46970282880776.%E5%8D%95%E6%94%AF%E9%94%89%E7%B4%A0%E6%9D%90.png)
1.K files for glide path development and determinethe working length
![DENCO rotary file ONLY ONE FILE details](https://cdn-ecgpa.nitrocdn.com/tQzbOMTUdnnLiSZFbOwrkYqxaaAaebpc/assets/static/optimized/wp-content/uploads/2021/11/7010b2a8ab0d9f801daa8b8215c9b52b.%E5%8D%95%E6%94%AF%E9%94%89%E7%B4%A0%E6%9D%901.png)
2.R25:ONLY ONE FILE perform a circumferential brushing movement, and the movement should not exceed 3 mm each time.
R40/R50:ONLY ONE FILE reach full working length and perform a circumferential brushing movement.
![DENCO rotary file ONLY ONE FILE details](https://cdn-ecgpa.nitrocdn.com/tQzbOMTUdnnLiSZFbOwrkYqxaaAaebpc/assets/static/optimized/wp-content/uploads/2021/11/c07a6a9bb895b6fb358d9a65e06e1678.%E5%8D%95%E6%94%AF%E9%94%89%E7%B4%A0%E6%9D%903.png)
3.Clean the grooves and irrigate the root canal. Afterwards continue with step 1-3 until full working length has been reached
![DENCO rotary file ONLY ONE FILE](https://cdn-ecgpa.nitrocdn.com/tQzbOMTUdnnLiSZFbOwrkYqxaaAaebpc/assets/static/optimized/wp-content/uploads/2021/11/e2aa1d517930464525845c85bd97110d.%E5%8D%95%E6%94%AF%E9%94%89%E7%B4%A0%E6%9D%906.png)
R25: For narrow canals
If the canal is partially or completely invisible.
![DENCO rotary file ONLY ONE FILE](https://cdn-ecgpa.nitrocdn.com/tQzbOMTUdnnLiSZFbOwrkYqxaaAaebpc/assets/static/optimized/wp-content/uploads/2021/11/6120c23ddabc896e9d68ab2aecf8dba1.%E5%8D%95%E6%94%AF%E9%94%89%E7%B4%A0%E6%9D%905.png)
R40: For medium canals
If the canal is completely visible and hand file #20 K moves freely to working length but #30 can’t.
![DENCO rotary file ONLY ONE FILE](https://cdn-ecgpa.nitrocdn.com/tQzbOMTUdnnLiSZFbOwrkYqxaaAaebpc/assets/static/optimized/wp-content/uploads/2021/11/1142040aee5e2eccb854433f55697364.%E5%8D%95%E6%94%AF%E9%94%89%E7%B4%A0%E6%9D%907.png)
R50: For wide canals
If the canal is completely visible and hand file #30 K moves freely to working length.
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