I would agree with others in that the depth of penetration for the RF treatment is not deep enough to adversely impact the Bellafill. Having said that I am not a huge fan of the RF treatments as a whole as the results seem to be very inconsistent.
The melting point for Bellafill is 160 degrees C. Lasers get to about 100C and RF gets to 45-70C depending on the device. As you can see, neither is hot enough to melt the PMMA in Bellafill.