Etienne, there is a doc here in town who has a Deka CO2 which he loves and also a Deka ErYAG and he tells me that he get lots of sensitivity and doesnt use his much.

Does the water flow come out onto the tooth with the window type delivery system. I dont know if your system is as versatile as some of the systems with contact tips. Does anyone in your area have the unit. What are they using for settings. What is your water flow per minute, and where does it fall. Can you cut Class Vs , incisal edges, class 3s or are all preps sensitive.

Measure your water flow and with the scope see where the water falls when you use a mirror system (does it hit where the beam is touching and ablating the tooth).

Glenn

There is a massive difference between window type delivery systems and tips where the water flow can be controlled much more easily to fall where you are aiming.

If you do test the water flow mine is around 14-18ml/min.

Glenn

Etienne: I’ll chime in here with another thought. I don’t know the laser you’re using very well, but you did mention that you’re using “the shortest pulse duration available”, so I’m guessing your laser allows you to vary the pulse duration. Dan you tell us what the range of pulse durations are? Generally, shorter pulse durations are associated with increase sensitivity due to the higher peak pulse powers.

I treat these occlusal cupolas frequently, but my delivery system is significantly different on my Hoya unit, so quoting my settings won’t help much, but generally more water, lower pulse energy (mj), and lower hz translates to less sensitivity.