Top 5 Factors to Know in Rotary Endodontics to Minimize RCT Failure

The successful endodontic treatment completely depends on accurate diagnosis and accurate preparation of the pulp space for restoration. Previously dentists used to do mechanical preparation of teeth using hand files in a step back technique which was time-consuming and would cause fatigue to the dentist as well as it was tedious for the patient. Overcoming these drawbacks with help of new technology Dental Endo motors with advanced technology have come into the market.

Top 5 Factors to Know in Rotary Endodontics to Minimize RCT Failure

These engine-driven instruments help to remove all debris at an ease and in a short period making the root canal treatment comfortable for the patient and at the same time improving the efficiency of the Dentist. These endo motors comprise a control unit and a contra-angle handpiece to attach various files. Any rotary file system can be attached to the endodontic handpiece.

However, there are a few things to keep in mind that will help you avoid procedural errors and reduce the number of RCT failures.



Torque is a measure of how much rotational force acting on an object & causing that object to rotate. In Root canal therapy, the torque is set to cut the canal walls efficiently for the preparation of the root canals and also provide it a tapering by avoiding the procedural accidents. Torque has to be controlled as different file systems require different torque values. Rotary files in canals are subjected to variable torque values, and if the value exceeds the specified torque limit, the instrument is at risk of breaking, resulting in treatment failure.


Speed refers to revolution per minute that is the file rotates in a minute. Variety of speeds has been recommended for different file systems. The average recommended speed ranges from 150 rpm to 500 rpm for the mainstream file systems. Although greater speed comes with disadvantages like:

  1. Loss of tactile sensation.
  2. Loss of control.
  3. Breakage of the instrument with flute distortion.
  4. Change in Canal Anatomy or Procedural accidents.

The balance of speed and torque in the rotary file determines cutting efficiency. If the torque is inadequate, the efficiency of canal preparation may be hampered; on the other hand, if the speed is high, the file inside the canal may break or even fracture the tooth. By selecting the recommended speed and torque value, root canal failure can be avoided. Because different file systems require varied torque and speed levels, endomotor selection must be done carefully to ensure flexibility in speed and torque settings.


Advanced endodontic motors provide the benefit of automatic operation, which reduces the risk of error. If the desired amount of torque has been reached the auto-reverse feature shifts rotation in opposite direction reducing the load on rotary files and returns to forward rotation when the excess load is eliminated. Such endo motors prove to be beneficial. The reverse motion in motors can be of help to avoid the risk of ledge formation, perforation, or over instrumentation during biomechanical preparation.


Advanced endomotors are capable of using two devices together improving efficiency and accuracy.  When the endomotor is used in conjunction with the apex locator in a combined mode, the dentist can see the file inside the canal in real-time, making root canal preparation safer and more precise.


Top 5 Factors to Know in Rotary Endodontics to Minimize RCT Failure

One such interesting product is Endo Smart Plus Endomotor by woodpecker. It is a high-performing, cordless, Brushless Endodontic Motor that can be used with a Dpex V apex locator. By connection to the apex locator, the exact position of the file in the canal can be located. Also,  functions like auto apical reverse/stop can be activated. It has a brushless motor which means higher performance, precision, and durability. Compatible with all NiTi files, incorporating a small head for higher visibility making it the best endomotor to use. It comes with wireless charging and adjustable torque and speed. The contra-angle handpiece is capable of 360-degree rotation providing flexibility of operation.


“What we remove from the pulp space is far more important than what we replace it with”

Choosing the right endo motor with good efficiency and precision is therefore crucial. Unicorn Denmart offers the most advanced new generation endomotors in the market, allowing dentists to perform securely during root canal preparation.

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