8
Preclinical Considerations
•
The EndoVac’s fluid mechanics depend on an intact clinical crown with an access opening measuring at
least 6-8 millimeters from cavosurface angle to the pulp floor. If the clinical crown is compromised, create
a temporary crown using a composite material.
•
Final apical shape must be at least a #35 with a 4% taper. For non-tapered preparations, it is
recommended that LightSpeedLSX be used as a finishing file to enlarge to at least a size #45. This will
provide adequate space for the MicroCannula to reach full WL and help ensure a cleaner canal.
1. Multi-Port Adapter and MDT Set-up in the Operatory
Figure 1. The Multi-Port Adapter (black arrow) is placed in a Hi-Vac connection as it sits in the evacuation rack.
Ensure suction control valve (white arrow) is fully open.
Figure 2. Install Fingerpiece/Handpiece tubing set (white connectors) into both holes (black arrows) at the top
of the Multi-Port Adapter. Loop the clear tubing behind the evacuation rack (white arrows).
Figure 3. Install the Master Delivery Tip (MDT with blue connector) onto the 20 cc syringe that holds NaOCl.
Figure 4. Firmly insert one end of the MDT tubing set (blue connectors) to the blue connector of the MDT
(black arrow).
Figure 5. Firmly insert the opposite end of the MDT tubing set (blue connectors) to the lower port of the
Multi-Port Adapter (black arrow).
Figure 6. Hang the MDT on the screw (black arrow) attached to the front of the Multi-Port Adapter.
Figure 7. The assistant or dentist now has convenient access to the MDT at all times.
2. MDT Use During Instrumentation
Overview
The MDT (Figure 8) provides both a constant source of fresh sodium hypochlorite from its metal delivery tip
(Figure 9 - white arrow) into the pulp chamber and the immediate removal of any excess irrigant via the plastic
evacuation hood (black arrow) surrounding the delivery tip. This dual action provides a method of maintaining
a pulp chamber brim full with fresh sodium hypochlorite. The delivery tip is placed just inside the access
opening while the evacuation hood remains on the outside. A stream of irrigant is directed from the delivery
tip at an axial wall and never should it be aimed directly into a pulp canal orifice.
Reminder: It is possible to create positive pressure into the pulp canal, thus creating the risk of a sodium
hypochlorite accident — if the clinician fails to follow these points: (a) always discharge the irrigant from the
MDT into a natural or temporary intact access opening measuring at least six to eight (6-8) millimeters from
cavosurface angle to pulp floor; (b) always direct the irrigant stream at an axial wall approximately 45 degrees
from the pulp canal’s axial plane in molars, 60 degrees in premolars, and 90 degrees in anteriors; and (c) never
place the MDT’s delivery tip closer than five (5) millimeters from the coronal opening of any pulp canal. (Figure 9)
Use
Instrumentation generates significant debris that must be evacuated from the pulp chamber via evacuation
and fresh irrigant replacement. Use the MDT to deliver approximately one (1) cc of sodium hypochlorite at
each instrument change in order to evacuate the debris and refresh the irrigant in the pulp chamber.
Figure 10. To avoid spillage of excess irrigant adjust the MDT tip and Evacuation Hood by bending it into a
suitable position for each tooth.
Gripping the Syringe/MDT
Gripping the syringe plunger with the palm of the hand (white arrow) rather than with the thumb will reduce
hand fatigue. (Figure 11). The needle component of the MDT was intentionally designed with a small internal
diameter to prevent spills via a controlled flow. Some doctors or assistants do not have enough hand strength
to comfortably express the NaOCl through a 20 cc syringe. In this case it is recommended to use 10 cc syringes
and change the syringe more often.
3. MacroCannula Clinical Set-up
Figure 12. Firmly insert the MacroCannula into the Handpiece.
Figure 13. Remove the white connector closest to the front of the Multi-Port Adapter (arrow).
Figure 14. Firmly insert it into the back of the Handpiece (arrow).
Figure 15. Use the MDT to deliver irrigant into the pulp chamber.
Note: Check that the MacroCannula is suctioning properly. If not, check the Hi-Vac system and that the
connections were made properly.
Summary of Contents for EndoVac
Page 1: ...EndoVac Apical Negative Pressure Irrigation System Instructions for Use...
Page 3: ...3 1 Figure 1 Figure 2 Figure 3 Figure 4 Figure 5 Figure 6 Figure 7...
Page 4: ...4 2 3 Figure 8 Figure 9 Figure 10 Figure 11 Figure 12 Figure 13...
Page 5: ...5 4 5 Figure 14 Figure 15 Figure 16 Figure 17 Figure 18 Figure 19...
Page 6: ...6 6 7 Figure 20 Figure 21 Figure 22 Figure 23 Figure 24 Figure 25...