dental supply

The Benefits of Endo Motor Reciprocating Motion in Root Canal Treatment

wireless endo motor with build in apex locator

Reciprocating motion is becoming an increasingly popular approach in endodontic root canal preparation. But why is this alternating rotation so advantageous compared to traditional continuous rotation? In this article, we’ll explore the main benefits of using reciprocation and how it is impacting modern root canal therapy.

Why need reciprocating motion in endodontics

Reciprocating motion refers to an alternating clockwise and counterclockwise rotation used during root canal instrumentation. This is in contrast to continuous rotation in one direction.

Reciprocating motion is designed to reduce torsional stress on endodontic files and decrease the risk of file separation or fracture during cleaning and shaping procedures.

It enhances canal centering and improves cutting efficiency while minimizing the chances of ledging, transportation, or perforation of the root canal system.

Reciprocation allows the file to periodically disengage dentin and enables improved debris removal compared to continuous rotation.

How does endo motor work on reciprocating mode

Endodontic motors can operate reciprocating files in two main ways:

1. Pre-set reciprocation mode:

Here, the angles of reciprocation (clockwise and counterclockwise rotation) are fixed and pre-programmed into the endo motor.

For example, a file like WaveOne Gold has a fixed reciprocation of 170° counterclockwise and 50° clockwise rotation. This is built into the motor and not changed during use.

2.Adaptive Torque Control (ATC):

Motors with ATC monitor torque levels and can dynamically adjust the reciprocation angle based on feedback from the file.

This allows the reciprocation motion to adapt in real-time to the unique anatomy of each canal.

The reciprocation angle changes automatically to maintain optimum cutting efficiency and prevent file separation when high torque levels are sensed.

ATC aims to improve safety and prevent file fracture compared to fixed reciprocation.

So in summary, pre-set reciprocation uses fixed angles while ATC adapts the angles in real-time based on torque feedback from the file. The goal of both is safe and efficient reciprocating motion.

Best Two Endo Motor Reciprocating Features

endo motor works with apex locator

It features a brushless motor, integrated apex locator, color display, and wireless functionality, streamlining root canal measurements and treatments. With adjustable speed, torque, sensitivity, and automated apical features, it can be customized to suit every patient’s needs. Plus, the ergonomic and ambidextrous design enhances performance and productivity, and the 360° Rotatable Contra Angle and torque calibration protect delicate root canals.

The endo motor allows ATC, reciprocating rotation mode, and build in 5 Pre-set reciprocation modes in M0.

5 Pre-set reciprocation modes:

1Fwd 150°-Rev 30°For continuous rotation files
2Fwd 180°-Rev 30°For continuous rotation files
3Fwd 210°-Rev 30°For continuous rotation files
4Fwd 250°-Rev 30°For continuous rotation files
5Fwd 30°-Rev 150°For reciprocating files

Technical table:

DisplayColor TFT display
Apex LocatorConnected, adjustable sensitivity
Apical ControlAuto start/stop, apical reverse, apical slow down
Working ModesForward, reverse, adaptive, reciprocating
Memory9 programmable memory slots (M1-M9)
Build in 5 pre-set reciprocating modes
Speed Range120-1000 rpm
Torque Range0.5-4.0 Ncm
Handpiece1:1 mini contra-angle
Battery1500 mAh capacity
  • Endo motor with 16:1 handpiece, maximum 550rpm

The New Endo Motor Reciprocating System: the perfect tool for efficient and safe root canal preparation!

This system, combined with the integrated apex locator, allows for precise and controlled file advancement while monitoring the canal length. The motor’s automated functions, such as auto start/stop/reverse and torque monitoring, ensure that the file tip is always at the right distance from the apex. The enlarged interface provides visual feedback when the anatomical apex is near, allowing you to avoid overinstrumentation.

root canal apical measuring and expanding model works together
endo motor + mini 16:1 contra-angle handpiece + build in apex locator

Technical table:

Torque Range0.3-4.0 Ncm
Speed Range140-550 rpm
Handpiece16:1 reduction mini head
Battery800 mAh Lithium rechargeable battery
Working ModesM0-M9: 10 custom endo modes, allowing ATC, and Reciprocation 
M9: Apex locating mode
Apex LocatorIntegrated, Accuracy: ±0.5 mm
Measurement Range0-99 mm
DisplayLED display shows enlarged canal on apex approach
File CompatibilityAll ISO endo files and systems

In conclusion, reciprocating motion offers distinct advantages that are transforming modern root canal preparation techniques. The alternating clockwise and counterclockwise rotation is designed to minimize stress on endodontic files, enhance cutting efficiency, improve canal centering, and enable better debris removal.

While continuous rotation can lead to file separation or fracture, reciprocation allows the file to periodically disengage dentin for improved safety. Systems like WaveOne, Reciproc, and Adaptive Motion provide preset angles or allow adaptive torque control to optimize the reciprocating motion.

With the flexibility of pre-programmed motors or real-time feedback, reciprocation enables canal shaping with fewer instruments. Although reciprocating motion has limitations in certain complex anatomies, the overall benefits of increased safety, reduced file failures, and predictable shaping make it an important advancement in endodontic therapy.