Morita Root ZX II Quick Manual

What is OTR (Optimum Torque Reverse)?

The ROOT ZX II OTR Module prepares root canals while
helping to prevent file jamming inside the canal.
OTR Function Illustrations
Normal Filing
Cutting
Load is less than torque setting
Filing is performed normally.

Usage

1. Power

Press the button to turn on the unit.

2. Memory Selection - OTR Mode

Press the button to set the memory to the OTR mode.
You may select either M1 or M2 for the file's appropriate
rotation speed.
Factory Setting for Memories
Setting
Rotation Mode
Speed (rpm)
Torque Line (Level) *
• If the OTR release action is triggered before inserting the file in the canal,
raise the torque line by one level.
• To change the memory parameters, refer to the Operation Instructions
(Settings and Changing Memory).
* Set value to trigger the OTR action.

3. Check Torque Bar Reading

The torque line should be set at 1 and
the file used with a vertical motion
(pecking motion).

4. Start Filing

Step on the foot switch to start the motor handpiece.
• In OTR mode," " appears in the rotation speed window when the motor
is running.
OTR Action
Load
90°
3
2
1
Cutting
Release Load
Load exceeds torque setting
File reverses for 90º then moves
forward 180º, and repeats as necessary.
Memory
M1 M2
OTR OTR Normal
300 500
1 1
Torque Line Display
Quick Guide
Video: www.morita.com/usa/otr
OTR offers a safer and more efficient method for canal
preparation. OTR reduces the possibility of:
1. File breakage
2. Ledge formation
3. Canal transportation
Also, when the handpiece is linked to the apical reverse or
stop function, the working length of the canal can be properly
prepared without damaging the apex.
Since the ROOT ZX II
from regular filing to OTR action depending on the shape and
condition of the file, filing efficiency is not greatly reduced. Also,
the instrument can be used in regular mode for pre-flaring.
Files that cut during forward rotation must be used.
Torque Line
Display
Rotation Speed
Display
M3
250
3
Level 1
For the OTR mode, the torque line setting represents the
toque level when the handpiece starts rotating. It is easi-
er to switch over to the OTR mode when this is set at a
low level. A low torque setting will not have much influ-
ence on the actual torque applied. In the OTR mode, filing
c an re ach the
3.5 N/cm so filing efficiency will be the same.
If the OTR function is triggered before the file is inserted
in the canal, increase the torque line setting.
(OTR Mode)
in curved canals
OTR system automatically switches
1 2
R O OT Z X II 's m a x imum torque of
Apical Line
Memory