How to use endodontic file?

Endodontic files are very important instruments in the process of root canal treatment, and different endodontic files have different functions and methods of use. This article will give you a detailed introduction on how to use the endodontic files.

Root canal exploration

Root canal dredging and apical positioning

Open the upper section of the root canal and establish a straight channel

Further dredge and establish smooth passage

System file preparation, expanded to working length

Choose the corresponding tooth tip

1.Root canal exploration

The K file in the stainless steel hand file can be used for exploration and dredging. During preparation, the medullary canal can be filled with 17% EDTA lubricating root canal. When curved root canal is encountered, the stainless steel K file is pre-bent. Rotate gently into the root canal with the touch of the hand, and rinse with a large amount of sodium hypochlorite solution.

2. Root canal dredging and apical positioning

Use stainless steel hand to turn clockwise with K file, and gently lift 4-5 times to dredge the root canal. Need to use a large amount of sodium hypochlorite solution for rinsing. In clinical operation, it should cooperate with the root canal length measuring instrument to determine the accurate working length.

3. Open the upper section of the root canal and establish a straight channel

Use an open file to fully pre-open the root canal, set the root canal motor speed: 375rpm, torque: 3N.cm, start the root canal motor, establish a linear channel on the 1/3 part of the root, and pull up and down along the root canal 3-4 times, When receding, move along the root canal wall with a "brush" technique and rinse with a large amount of sodium hypochlorite solution. When debris accumulates in the root tip, the root canal can be dredged with a K file.

4. Further dredge and establish smooth passage

Use the root canal measuring rule to determine the working length of the file. Set the root canal motor speed: 375rpm, torque: 1.5N.cm. Shortly lift into the root canal 3-4 times, and then retreat when encountering resistance, do not press down, brush the side wall properly, and exit the root canal for irrigation after reaching the working length.

5. System file preparation, expanded to working length

Use the root canal measuring rule to determine the working length of the file. Pull up and down 3-4 times along the direction of the root canal, move backwards along the root canal wall by "brushing", and use a large amount of sodium hypochlorite solution to rinse each preparation. When debris accumulates at the apex, K files can be used for back filing and large amounts of rinsing. In the next step of preparation, the file tip should be dipped in EDTA to keep it lubricated, so as to enter the root canal smoothly. The endodontic files such as Niti Protaper Gold heat-activated should not stay in the root canal for more than 5 seconds. Each preparation should be filled with EDTA for lubrication, rinsed with sodium hypochlorite solution, and pay attention to remove debris on the edge of the file every time to keep the surface of the file clean. After the preparation is completed, the root canal can be dried with a moisture-absorbing paper tip and a saliva suction head.

6. Choose the corresponding tooth tip

For root canal filling, the tooth tip corresponding to the taper and number of the main tip file is used for filling, and the commonly used tooth tip is 04/25 or 06/25.

The above are the specific steps of using endodontic files in root canal treatment and dental pulp treatment. Although it may seem complicated, it is something the dentist must do during the treatment. If you have any other questions about using endodontic files, please visit our website for consultation.