Huizhou Pengchengrui Technology Co., Ltd.

The service life of nickel titanium files is not determined by the number of sterilization cycles, but by the number of prepared root canals per case.

>Core principle: The degree of bending is the biggest factor determining the lifespan. As long as micro cracks or spinning occur under the microscope, it should be immediately scrapped, regardless of how many times it has been used

Nickel-titanium file

1. Conventional multi rotation nickel titanium files (ProTaper, Mtwo, etc.)

-  ✅  Straight root canal/anterior teeth: can prepare 20-30 root canals

-  ✅  Moderately curved molars: 10-15 root canals (clinically conservative recommendation is 5-10 root canals)

-  ⚠️  Severe bending, S-shaped bending, and steep root tip bending: single use, disposable after use (safest)

2. Reciprocating single file (single file systems such as Reciprocac and WaveOne)

The manufacturer generally recommends preparing up to 3-5 root canals per file; Complex curved root canals are disposable.

3. Domestic heat activated nickel titanium files (M3 Pro, etc.)

-Straight root canal anterior teeth can have up to 30 canals; There are approximately 15 curved tubes in the posterior teeth; Heavy bending is recommended for one-time use.

Nickel-titanium file

4. Important Reminder

1. Fatigue is cumulative: even if it is cleaned and sterilized in a standardized manner every time, micro damage inside the metal will continue to accumulate, and micro cracks cannot be seen with the naked eye. It is necessary to inspect before and after each use with a magnifying glass/microscope;

2. It is increasingly recommended in clinical practice to directly use nickel titanium files for curved molars and re treated cases to avoid the risk of instrument separation;

3. Factors affecting lifespan:

-The greater the bending angle of the root canal, the sharply reduced its lifespan

-Forcefully pressing down and continuing to operate with high resistance → Severe fatigue occurs after one attempt

-Long term immersion in sodium hypochlorite, corrosion pitting → significantly shortened lifespan

-Directly filing without establishing a smooth path can easily cause twisting damage

4. Don't just remember fixed numbers: the number of times is only a reference upper limit, and abnormal microscopic examination should be given priority for scrapping

The service life of nickel titanium files depends on the curvature of the root canal: straight root canals can be used multiple times; Moderate bending reduces the frequency of use; Highly curved root canals are recommended for one-time use; Before and after each use, it must be inspected under a microscope, and any deformation or cracks should be immediately discarded.

Pengchengrui Technology Co., Ltd. in Huizhou City specializes in supplying nickel titanium file components with excellent corrosion resistance and super elastic properties, suitable for single and multiple nickel titanium file solutions. The product has excellent toughness and strong fatigue resistance, and can smoothly adapt to curved root canals, effectively reducing the risk of instrument separation. Precision manufacturing, stable quality, supporting customized matching, providing reliable substrates for dental root canal treatment equipment. Welcome to inquire and discuss cooperation.