How deep can one go on nose with fractional CO2 without damaging cartilage?

Hi!

I gonna get a chin + nose fractional CO2 treatment for acne scars. However, I'm afraid that my doc will go too deep on the nose and hence damage the cartilage.

Is this possible?

What is the maximum depth he can go? 1mm?

Many thanks for your help!

Done 2 70mJ fraxels. Need your help on # of *passes* and *treatment level*

Hi!

I've had 2 fraxel 70mJ treatments so far. However, I feel my practitioner didn't go as hard as she could.

I know mJs are depth. However, there is also of course density.

Could you please indicate for me the absolute most aggressive settings (knowing that the mJs are fixed at 70mJ).

For example:

Energy: 70mj (fixed)

Treatment Level: ?

Passes: ?

Head tip information: 125 or 250 ?

Thanks very much!