Micro-needling gives good results for superficial acne scars over multiple sessions. However, it is unlikely to give good results for deep acne scars.
For deep/severe acne scars, you would still need Fractional micro-needling Radiofrequency, like Infini, which can deliver RF energy to depths that Fractional CO2 cannot reach. Devices like Infini can deliver RF energy up to depths of 3.5mm, whereas Fractional CO2 delivers energy up to 1mm deep.
Please consult a doctor for a more detailed discussion. Hope that this helps!
Warmest regards,
Dr Justin Boey
